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Everything posted by LostCosmonaut

  1. LostCosmonaut

    Competition: Tank Design 2239

    Finally got my turret to work (decent depression, close to balanced, gun doesn't smash the commander in the groin when it fires); Maximum gun depression is about 9.5 degrees. Model is still a bit unfinished, but it's at least enough to prove the bits work. Weight of the turret and hull armor (ignoring gun model) is about 14.5 tons. Assuming the armor mass increases to 15 tons by the time I'm finished modeling everything, and the armor comes out to 43% of the total mass (midpoint of the range listed in this post; http://sturgeonshouse.ipbhost.com/topic/1085-design-contest-supplement-typical-weights-in-a-modern-tank/ ), it's on pace to come out at about 35 tons.
  2. LostCosmonaut

    Competition: Tank Design 2239

    Backstory (skip if you don't like alternate history junk) The year is 2239. It has been roughly 210 years since the world was engulfed in nuclear war. Following the war, the United States splintered into hundreds of small statelets. While much knowledge was retained in some form (mostly through books and other printed media), the loss of population and destruction of industrial capability set back society immensely. Though the Pacific Northwest was less badly hit than other areas, the destruction of Seattle and Portland, coupled with the rupturing of the Cascadia Subduction Zone in 2043, caused society to regress to a mid-19th century technology level. However, in the early 2100s, the Cascade Republic formed, centered near Tacoma. The new nation grew rapidly, expanding to encompass most of Washington and Oregon by 2239. The Cascade Republic now extends from the Klamath River in the south to the Fraser River in the north, and from the Pacific roughly to central Idaho. Over time, the standard of living and industrial development improved (initially through salvaging of surviving equipment, by the late 2100s through new development); the population has grown to about 4.5 million (comparable to 1950 levels), and technology is at about a 1940 level. Automobiles are common, aircraft are less common, but not rare by any means. Computers are nonexistent aside from a few experimental devices; while scientists and engineers are aware of the principles behind microchips and other advanced electronics, the facilities to produce such components simply do not exist. Low rate production of early transistors recently restarted. The current armored force of the Cascade Republic consists of three armored brigades. They are presently equipped with domestically produced light tanks, dating to the 2190s. Weighing roughly 12 tons and armed with a 40mm gun, they represented the apex of the Cascade Republic's industrial capabilities at the time. And when they were built, they were sufficient for duties such as pacifying survivalist enclaves in remote areas. However, since that time, the geopolitical situation has complicated significantly. There are two main opponents the Cascade Republic's military could expect to face in the near future. The first is California. The state of California was hit particularly hard by the nuclear exchange. However, in 2160, several small polities in the southern part of the state near the ruins of Los Angeles unified. Adopting an ideology not unfamiliar to North Korea, the new state declared itself the successor to the legacy of California, and set about forcibly annexing the rest of the state. It took them less than 50 years to unite the rest of California, and spread into parts of Arizona and northern Mexico. While California's expansion stopped at the Klamath River for now, this is only due to poor supply lines and the desire to engage easier targets. (California's northward advanced did provide the final impetus for the last statelets in south Oregon to unify with the Cascade Republic voluntarily). California is heavily industrialized, possessing significant air, naval, and armored capabilities. Their technology level is comparable to the Cascade Republic's, but their superior industrial capabilities and population mean that they can produce larger vehicles in greater quantity than other countries. Intelligence shows they have vehicles weighing up to 50 tons with 3 inches of armor, though most of their tanks are much lighter. The expected frontlines for an engagement with the Californian military would be the coastal regions in southern Oregon. Advancing up the coastal roads would allow California to capture the most populated and industrialized regions of the Cascade Republic if they advanced far enough north. Fortunately, the terrain near the border is very difficult and favors the defender; (near the Californian border) The other opponent is Deseret, a Mormon theocratic state centered in Utah, and encompassing much of Nevada, western Colorado, and southern Idaho. Recently, tension has arisen with the Cascade Republic over two main issues. The first is the poorly defined border in Eastern Oregon / Northern Nevada; the old state boundary is virtually meaningless, and though the area is sparsely populated, it does represent a significant land area, with grazing and water resources. The more recent flashpoint is the Cascade Republic's recent annexation of Arco and the area to the east. Deseret historically regarded Idaho as being within its sphere of influence, and maintained several puppet states in the area (the largest being centered in Idaho Falls). They regard the annexation of a signficant (in terms of land area, not population) portion of Idaho as a major intrusion into their rightful territory. That the Cascade Republic has repaired the rail line leading to the old Naval Reactors Facility, and set up a significant military base there only makes the situation worse. Deseret's military is light and heavily focused on mobile operations. Though they are less heavily mechanized than the Cascade Republic's forces, operating mostly armored cars and cavalry, they still represent a significant threat to supply and communication lines in the open terrain of eastern Oregon / southern Idaho. (a butte in the disputed region of Idaho, near Arco) Requirements As the head of a design team in the Cascade Republic military, you have been requested to design a new tank according to one of two specifications (or both if you so desire): Medium / Heavy Tank Weight: No more than 45 tons Width: No more than 10.8 feet (3.25 meters) Upper glacis / frontal turret armor of at least 3 in (76mm) LoS thickness Side armor at least 1in (25mm) thick (i.e. resistant to HMG fire) Power/weight ratio of at least 10 hp / ton No more than 6 crew members Primary armament capable of utilizing both anti-armor and high explosive rounds Light tank Weight: No more than 25 tons Width: No more than 10.8 feet Upper glacis / frontal turret armor of at least 1 in thickness Side armor of at least 3/8 in (10mm) thickness Power/weight ratio of at least 12 hp / ton No more than 6 crew members Primary armament capable of utilizing both anti-armor and high explosive rounds Other relevant information: Any tank should be designed to operate against either of the Cascade Republic's likely opponents (California or Deseret) The primary heavy machine gun is the M2, the primary medium machine gun is the M240. Use of one or both of these as coaxial and/or secondary armament is encouraged. The secret archives of the Cascade Republic are available for your use. Sadly, there are no running prewar armored vehicles, the best are some rusted hulks that have long been stripped of usable equipment. (Lima Tank Plant ate a 500 kt ground burst) Both HEAT and APFSDS rounds are in testing. APCR is the primary anti-armor round of the Cascade Republic. Either diesel or gasoline engines are acceptable, the Cascade Republic is friendly with oil producing regions in Canada (OOC: Engines are at about a late 1940s/early 50s tech level) The adaptability of the tank to other variants (such as SPAA, SPG, recovery vehicle, etc.) is preferred but not the primary metric that will be used to decide on a design. Ease of maintenance in the field is highly important. Any designs produced will be compared against the M4 Sherman and M3 Stuart (for medium/heavy and light tank), as these blueprints are readily available, and these tanks are well within the Cascade Republic's manufacturing capabilities.
  3. LostCosmonaut

    Aerospace Pictures and Art Thread

    Post cool pictures (including art) of aerospace object here.
  4. LostCosmonaut

    Competition: Tank Design 2239

    No strong preference, they'd need forest and desert camo for different operating environments, plus winter camo as well.
  5. LostCosmonaut

    Competition: Tank Design 2239

    Sure, if you're up for it. M3 or M22 sounds about right, I honestly didn't have a full design spec'ed out in my head beyond the approximate weight and armament. ''
  6. LostCosmonaut

    Competition: Tank Design 2239

    Yeah, any publicly available research can be used in development of your design. Although I like the thought that the nation's archives are just a bunch of shit that somebody printed out from SH, which was somehow the only thing to survive the nuclear apocalypse.
  7. LostCosmonaut

    Competition: Tank Design 2239

    I didn't have anything specific in mind for ammo requirements, I'll leave that up to the judges determination as long as you have a reasonable number (i.e. 10 rounds for the main obviously wouldn't be acceptable, but 30 might be depending on what it is and what kind of secondary armament you have and such). Any of the tanks you design should be capable of engaging hard and soft targets.
  8. LostCosmonaut

    Aerospace Documents Collection Point

    I will be making a list of useful aerospace related documents in this thread. I'll be adding my own collection at first, feel free to add you own. Launch Vehicles Advanced Cryogenic Expendible SSTO Advanced Rocket Engines Air Augmented Rocket Propulsion Concepts Improved Saturn V Variants History of Soviet Liquid Fueled Engines Silbervogel The Space Shuttle as an Element in the National Space Program (published 1970) Space Shuttle Range Safety Command Destruct System Why Does the Space Shuttle Have Wings?: A Look at the Social Construction of Technology in Air and Space Human Rated Delta IV Ignition! An Informal History of Liquid Rocket Propellants Soviet Space Program Handbook (1988) Launch Loop Atlas V Users Guide Current Evaluation of Tripropellant Concept Star Raker Assessments of Proposed Upgraded (STS, 1999) Liquid Flyback Booster Configurations Liquid Flyback Booster Study Assessment Dual Liquid Flyback Booster for Space Shuttle Apollo Lunar Module Propulsion Systems Overview Lifting Manned Hypervelocity Reentry Vehicles Saturn V Improvement Study Nuclear Propulsion Missions to Mars and the Moons of Jupiter and Saturn Utilizing Nuclear Thermal Rockets with Indigenous Propellants Nuclear Thermal Rockets Using Indigenous Martian Propellants Nuclear Thermal Rocket/VehicIe Design Options for Future NASA Missions to the Moon and Mars Nuclear Pulse Propulsion Solid Core Nuclear Propulsion Concept Development of Nuclear Rocket Engines in the USSR NSWR Space Nuclear Thermal Propulsion Program Rover Nuclear Engine Program Tests Design of Antimatter Annihilation Rocket Antiproton Powered Propulsion with Magnetically Confined Plasma Engines Nuclear Pulse Space Vehicle Study SOAR: Space Orbiting Advanced Fusion Power Reactor Metal DUMBO Rocket Reactor Fission Fragment Rocket Engine The Political Feasibility of Nuclear Power in Space Liquid Annular Reactor System (LARS) On the Use of a Pulsed Nuclear Thermal Rocket for Interstellar Travel Fission Fragment Rockets (1988) Exploration Lunex Soviet Manned Lunar Program Solar Rocket System Concept Analysis Manned Mars Missions Using Electric Propulsion Galactic and Solar Cosmic Ray Shielding Issues in Radiation Protection: Galactic Cosmic Rays Titan Submersible Proposal Discovery of 1992 QB1 (first KBO) Color Diversity Among Centaurs and KBOs Manned Venus Flyby Proposal (1967) Manned Eros Flyby (would have used Apollo derivative possibly) Bussard Ramjet (simple) Bussard Ramjet (more stuff) Comparison of Phobos and Deimos as Exploration Targets Scenarios for the Orbits of 2000 CR105 and 2003 VB12 A couple of spaceflight books JIMO Materials Challenges Aerocapture Analysis for a Neptune Mission Aerogravity Assist at Triton Neptune Orbiters Using Solar and Radioisotope Electric Propulsion Magnetic Field of Mercury Human Exploration of Mercury and Saturn Project Mercury Report (1959) Abort Options for Mars Missions Manned Phobos Mission (Project APEX) Manned Venus Orbiting Mission High Altitude Venus Operations Concept Crewed Mission to Callisto Titan and Europa Mission Summary Design of a Common Lunar Lander (1991) Manned Lunar Habitats Meteroid/Debris Shielding Interstellar radio links enhanced by exploiting the Sun as a Gravitational Lens. Origin and Orbital Distribution of Trans-Neptunian Scattered Disc X-Ray Fluorescence from Inner Disc in Cygnus X-1 Evidence for a Distant Planet in the Outer Solar System Evidence for Nemesis (from 1985) THE USES OF ASTRONOMY AN ORATION Rapid Mars Transits with Exhaust-Modulated Plasma Propulsion VASIMIR Columbia Crew Survival Investigation Report CO2/Metal Propellants for Mars Sample Return Missions ISS EVA Radiation Protection Studies The Mars Project (Von Braun, 1953) That is not dead which can eternal lie: the aestivation hypothesis for resolving Fermi’s paradox Nanotechnology and Space System Architecture Apollo Guidance Computer Code List Missiles Defense Against Ballistic Missiles ICBM Basing Options Soviet Theater Nuclear Forces: Implications for NATO Defense (1981) The Evolution of the Cruise Missile A series of presentations on guided missile technology from the National University of Singapore. Seize the High Ground: The Army in Space and Missile Defense Soviet Concepts of Ballistic Missile Defense ABM R&D at Bell Labs Production and Deployment of Nike-X Professional Development Short Course on Tactical Missile Design Tactical Missile Design The Pluto Program Ballistic Missile Defense Report Military Aviation US THE SEARCH FOR AN ADVANCED FIGHTER A HISTORY FROM THE XF-108 TO THE ADVANCED TACTICAL FIGHTER F-106 Data Sheet Encyclopedia of US Air Force Air Craft and Missile Systems, Vol. 1 (1945-1973) Encyclopedia of US Air Force Aircraft and Missile Systems, Vol. 2 (1945-1973) Designations of US Aircraft Accuracy of Azon Guided Bomb AERODYNAMIC CHARACTERISTICS OF A 0.12-SCALE MODEL OF THE A-9A AIRCRAFT AT MACH NUMBERS FROM 0.30 TO 0.80 A-10 Thunderbolt II (Warthog) SYSTEMS ENGINEERING CASE STUDY FLIGHT EVALUATION (SYSTEMS) OF THE A-1OA PROTOTYPE AIRCRAFT - APPENDIX V - WEAPON DELIVERY FLIGHT EVALUATION (SYSTEMS OF THE A-10A PROTOTYPE AIRCRAFT RAND Study on F-20 Project FICON STABILITY AND CONTROL CHARACTERISTICS OF SEVEN LENTICULAR MODELS AT MACH NUMBER 5 FORCE TESTS ON TEN LENTICULAR MODEL CONFIGURATIONS AT MACH NUMBERS 3 AND 5 AND ANGLES OF ATTACK FROM 0 TO 90 DEG LANDING CHARACTERISTICS OF A LENTICULAR-SHAPED RE-ENTRY VEHICLE PYE WACKET. LENTICULAR ROCKET FEASIBILITY STUDY LONGITUDINAL STABILITY AND CONTROL CHARACTERISTICS OF A LENTICULAR MODEL AT MACH NUMBER 8 STATIC LONGITUDINAL STABILITY AND CONTROL CHARACTERISTICS AT MACH NUMBERS OF 2.86 AND 6.02 AND ANGLES OF ATTACK UP TO 95 DEGREES Congress and SDIO AIM-4F Falcon Characteristics Summary September 1963 AIM-4D Falcon Standard Missile Characteristics September 1963 APPROVED NAVY TRAINING SYSTEM PLAN FOR THE AIM-7M/P SPARROW MISSILE SYSTEM N88-NTSP-A-50-8008C/A NAVY TRAINING SYSTEM PLAN FOR THE AIM-9M SIDEWINDER MISSILE SYSTEM(FOR MODELS THROUGH AIM-9M-10) N78-NTSP-A-50-8105C/A NAVY TRAINING SYSTEM PLAN FOR THE AIM-9X SIDEWINDER MISSILE SYSTEM N88-NTSP-A-50-9601A/A APPROVED NAVY TRAINING PLAN FOR THE AIM-9M SIDEWINDER MISSILE SYSTEM (FOR MODELS THROUGH AIM-9M-8) A-50-8105B/A DRAFT NAVY TRAINING SYSTEM PLAN FOR THE AIM-54 PHOENIX MISSILE N88-NTSP-A-50-8007C/D APPROVED NAVY TRAINING SYSTEM PLAN FOR THE AIM-120 ADVANCED MEDIUM RANGE AIR-TO-AIR MISSILE N88-NTSP-A-50-8111C/A A-10/GAU-8 Low Angle Test Firings Versus Simulated Soviet Tank Company NPS-50-80-008 A4D-2 Standard Aircraft Characteristics Naval Air Training And Operating Procedures Standardization Manual A-4A/B/C F-16A-B MLU Pilot Guide Part 1 F-16A-B MLU Pilot Guide Part 2 Pilot Operational Procedures of F-16 USAF Test Pilot School F-4 Phantom II Guide USAF T. O. 1F-4C-1-2 Flight Operating Difference Supplemental Data USAF Series F-4E Aircraft Thunderbird Configuration NATOPS Flight Manual Navy Model RF-4B Aircraft NAVWEPS 01-235FDC-1 NATOPS Flight Manual Navy Model F-4J Aircraft NAVAIR 01-245FDD-1 NAVAIR 01-F14AAP-1B NATOPS POCKET CHECKLIST F-14B AIRCRAFT NATOPS FLIGHT MANUAL NAVY MODEL F−14D AIRCRAFT XB-35 Pilots Handbook YB-49 Pilots Handbook YRB-49A Pilots Handbook YF-12 Utility Flight Manual Aparent AN/APG–68(V5) Operations Guide, Used on F-16C Aircraft NAVEDTRA 14014A Ch. 9 Aircraft Ordnance Weapons File 2003-2004 TECHNICAL MANUAL, ENGINEERING HANDBOOK SERIES FOR AIRCRAFT REPAIR, GENERAL MANUAL FOR STRUCTURAL REPAIR T.O. NAVAIR 01-1A-1 - 1 APRIL 2015 NAVAIR 01-245DB-2-1.2 (6-1 to 6-49) part 1 NAVAIR 01-245DB-2-1.2 (6-50 to 6-86P) part 2 NAVAIR 01-245DB-2-1.2 (6-87 to 6-108) part 3 Pilots Flight Operating Instructions for Army Model B-17 F and G, British Model Fortress II P-40N Erection and Maintance P-40N Flight Operating Instructions F-86A Flight Handbook AN 01-60JLA-1 30 July 1952 F-86A Flight Handbook T.O. 1F-86-A-1 - 30 August 1957 U-2 Flight Utility Manual 1 March 1959 Supercharging the Allison V-1710 The Impact of Allied Air Attacks on German Divisions and Other Army Forces in Zones of Combat The Effect of the Allied Air Attacks on the Ground Echelon of the Luftwaffe in Western Europe in 1944 1959 SAC Target List A-26 Pilot Training Manual P-40 Pilot Training Manual P-51 Pilot Training Manual P-47N Pilot Training Manual P-38H Pilot Training Manual F-14D manual B-25 Pilot Training Manual USAF Designations Sheet (?) Air Force Performance in Desert Storm YF-109/F3L XBT2D-1 Destroyer Characteristics Sheet AD-5 Skyraider Aircraft Characteristics Sheet A4D-1 Skyhawk Aircraft Characteristics Sheet A2F-1 Intruder Aircraft Characteristics Sheet XF5U-1 Flapjack Aircraft Characteristics Sheet F7U-3P Cutlass Aircraft Characteristics Sheet F3D-2 Skyknight Aircraft Characteristics Sheet F4D-1 Skyray Aircraft Characteristics Sheet F2H-3 Banshee Aircraft Characteristics Sheet F3H-2N Demon Aircraft Characteristics Sheet F4H-1 Phantom Aircraft Characteristics Sheet AF1-E Fury Aircraft Characteristics Sheet AF-9J Cougar Aircraft Characteristics Sheet F-11A Tiger Aircraft Characteristics Sheet F-14A Tomcat Aircraft Characteristics Sheet R3Y-1 Tradewind Aircraft Characteristics Sheet R4Q-1 Flying Boxcar Aircraft Characteristics Sheet P2B-1 Superfortress Aircraft Characteristics Sheet P4M-1Q Mercator Aircraft Characteristics Sheet P5M-2S Marlin Aircraft Characteristics Sheet P3V-1 Orion Aircraft Characteristics Sheet D-188A Aircraft Characteristics Sheet HO4S-2 Aircraft Characteristics Sheet HSS-1F Seabat Aircraft Characteristics Sheet HSL-1 Aircraft Characteristics Sheet K-225 Aircraft Characteristics Sheet KD2G-2 Firefly Aircraft Characteristics Sheet D-188 Scale Model Flight Tests An Experimental Investigation of VTOL Flying Qualities Required for Shipboard Landings X-22A Report Air Combat Tactics Evaluation F-100 F-104 F-105 F-4C vs. MiG 15/17 Type Aircraft (F-86H) History of the NF-104A USAF Serial Numbers 1922-2018 JATO Rocket Flight Test An in-depth examination of the F-20 tigershark program Lockheed P-80A Manual North American X-15 Manual Bell YFM-1 Airacuda Manual CIA Oxcart Archives Performance and Surge Limits of a TF30-P-3 Turbofan Engine/Axisymmetric Mixed-Compression Inlet Propulsion System at Mach 2.5 Wind Tunnel Tests of 1/17th Scale XBDR-1 Model US Navy Interest in U-2 Project Hazel (Mach 3 Recon) Speed Agile Concept Lockheed's Archangel whitepaper NASA Comparison of Me-262, P-80, and Meteor P-38 Design Analysis, by Hal Hibbard Evolution of the F-16 R-2800 Maintenance Manual General Dynamics Aircraft X-Planes at Edwards ATF Contenders Grumman F-11 Northrop YF-23 Lockheed AH-56 Grumman F11F-1F Super Tiger Douglas A-1 Skyraider Douglas A2D Skyshark F-22 Raptor McDonnell Model Numbers Swept Wing Tailsitter USSR SOVIET ASSESSMENTS OF U. S. CLOSE AIR SUPPORT Soviet Naval Aviation (1986) Guide on using E-24 in MiG-23ML Part 1 Guide on using E-24 in MiG-23ML Part 2 Supposed digital transcription of Mi-24V(P) Pilots notes MiG-21Bis Performance Analysis Tumanskiy R-25-300 SU-27SK Flight Manual Part 1 SU-27SK Flight Manual Part 2 ICAS2002 Congress - Generations of Su-27 Fighter - Mickhail A. Pogossyan, Mickhail P. Simonov, German I. Zagainov, Alexy Z. Tarasov - Sukhoi Aircraft Design Bureau, Russia Aviation Week September 24 1990- Su-27 British Pilot Report (1 of 2) Aviation Week September 24 1990- Su-27 British Pilot Report (2 of 2) Russian performance charts for many planes Polkarpov Po-2 technical manual Tu-16 Badger Sukhoi T-50 Evaulation of Soviet Automatic Aircraft Guns 37mm NS and 37mm N Soviet Air Force P-39 Manual Soviet Assessments of North American Air Defense Tupolev Tu-22M Soviet Secret Projects: Fighters Since 1945 Su-25 Mi-24 MiG-29 MiG-31 Yakovlev V/STOL Fighters Su-27 Walkaround OKB MiG: A History Soviet Secret Bomber Projects UK Vulcan B MK. 2 Aircrew Manual Hunter F.1 Pilots Notes Sea Hawk F.2, F.B.3&5 and F.G.A.4&6 Pilots Notes Sea Hornet F.20 Pilots Notes Venom FB.4 Pilots Notes SPITFIRE IX, XI & XVI PILOTS NOTES THIRD EDITION Seafire Mk.I, II, III Merlin 32, 45, 46, 55 or 55M Engine Pilots Notes Seafire Mk.XV&XVII Griffon VI Engine Pilots Notes Seafire mk.45 Griffon 61 Engine Mk.46 Griffon 87 Engine Seafire FR.47 Griffon 87 or 88 Engine Naval Air Fighting Development Unit Test Report on Seafire FR.47 WT Thread with Pilot Notes on British/Commonwealth Planes Royal Air Force Buffalo Mk. I Manual [url= https://www.dropbox.com/s/d00qe9vl3sdkdxj/TempestV PilotNotes.pdf?dl=0 ]Tempest V Pilot's Notes[/url] British Secret Projects (Fighters) Sweden Swedish Military Aircraft Reference Sheet Swedish Air Force Squadron Composition Saab SK35C Draken Flight Manual SFI FPL SK35C 29 October 1994 Australian Government Evaluation of J35B A Bunch of Swedish Gas Turbine Patents from the 1930s Swedish Air Force Jet Engines AJ and AJS 37 Viggen flight manuals (untranslated) 1965 Swedish Fighter Tactics Manual From Jaktfalken to Viggen Where the Air Force was After 1945 Italy G.91 Flight Testing Italian F-104 UCAV Proposal Macchi 200 C Aircraft Manual CR.32 Manual February 1941 Italian Aviation Magazine Germany A Ram-Jet Engine For Fighters (NACA, 1947, Translation of German Paper) 1950 report on the Horten designs Luftwaffenmaterialkommando GAF T.O. 1F-MIG29-1 Flight Manual MiG-29 (English) Ta-152H Teil 1 Ta-152H Manual Translated Ta 152 C, Baubeschreibung Nr.290, 5.Januar 1945, 12 Seiten Ta 152 H-0, H-1, Vorläufiges Handbuch, Elektrisches Bordnetz, Januar 1945, 42 Seiten Ta 152, Ersatzteil-Liste Ta 152, Januar 1945, 299 Seiten Ta 152 C,H, Werkzeichnungen , 1943-1945, Band 1, 104 Seiten Do-335 A1 Teil 0 Flight Handbook Do-335 Patentschrift Document Do-335 A1 Geraeteliste Do 335 A-6 Nachtjaeger Baubeschreibung Do 335 B-0 Zerstoerer Daimler Benz Handbuch DB 601 A-B Daimler Benz DB 603 A Handbuch Daimler Benz DB 603 E-G Handbuch East German MiG-29 The Development of German Antiaircraft Weapons and Equipment of All Types Up to 1945 Flight evaluation of a captured ME-262 MK 112 Autocannon MK 101 MK 103 MK 108 American Analysis of Me-110 Bf-109 F-1 Handbook Me-109 K-4 Handbook Me-163 Handbook Me-262 A-1 Handbook R4M Rocket Jumo 004 Improvements Jumo 004 Pictures Fritz-X Rheinmetall RZ-65 Hecht Glide-bomb Wasserfall Hs 117 Schmetterling Rheintochter Rheinbote Rh Z 61/9 Luftwaffe Suicide Projects He-176 Soviet Bf-109 G-2 trials Bf-109 F-1/F-2 with DB601N Performance Trials US Navy Report on Messerschmitt Aircraft Development Ta-152 Working Drawings Ta-400 Focke Wulf PTL 021 German Secret Weapons Secret Wonder Weapons of Germany Rotorcraft of the Third Reich Luftwaffe Secret Projects (Ground Attack) Luftwaffe Secret Projects (Fighters) Luftwaffe Secret Projects (Bombers) Japan A7M Wind Tunnel Test Results (Untranslated) A6M3 Operations Manual (Untranslated) Ki-10 Manual (Untranslated) Ki-44 Manual (Untranslated) Nakajima Type 99 Ha25 Manual Nakajima Aircraft Engine List (Line Type) Nakajima Aircraft Engine List (Single Row Radial) Nakajima Aircraft Engine List (Double Row Radial) F6F-5 vs. J2M3 Japanese Secret Projects (WW2) Canada Canadian Neptune (P2V) Project 1794 (Avrocar) Final Report Israel 6 Day War Air Power France Mirage 2000C Manual L'Arsenal de l'aeronautique (Untranslated) Hawk 75 Pilot's Manual Hawk 75 Maneuvers Mirage F1 in South Africa Vietnam North Vietnam Air Defences Finland Winter War and Continuation War Aircraft Types Other/Uncategorized Leaked Swiss Evaluation of Gripen vs Eurofighter vs Rafale The Strategic Aspect of Supercruising Flight Standard Aircraft Characteristics Archive Close Coupled Canard Design for Air Combat Aerodynamic highlights of a fourth generation delta canard fighter aircraft Air Intakes for High Speed Vehicles Ballistic Missile Defense Penetration and Deceleration of 25,000 lb Bombs in Concrete Targets The Use of Prototypes in Weapon System Development Radar Cross Section Measurements Breuget Range Equation External Burning Ramjets Wingless Flight: The Lifting Body Story Engineering Design Handbook: Design for Air Transport and Airdrop of Materiel Akin's Laws of Spacecraft Design A Study of Hypersonic Aircraft (1964) A Linear Accelerator in Space Astronomical Engineering: A Strategy for Modifying Planetary Orbits A comparison of sleeve valve and poppet valve engines. Combat Aircraft Prototypes Since 1945 Aviation (Civilian) Generalized Performance Comparison of Large Conventional, Tail Boom, and Tailless Aircraft (NACA, 1947) The Supersonic Transport as an Instrument of National Power Silent Supersonic Demonstrator (Japan) Sonic Boom Reduction United 232: Coping with Loss of All Flight Controls Wing-in-Ground Effect Craft Supersonic Aerodynamics 747-400 Flight Crew Operations Manual Boeing 747-400 Operations Manual 767-300 Flight Crew Operations Manual For Norwind Airlines - Document Number D632T001-36NRW - Revision Number: 9- Revision Date: August 16, 2013 Aerodynamic Characteristics of Four Duct Tandem VTOL Aircraft Configurations Engine Proposal for Phase III of the Supersonic Transport Program Supersonic Transport Engines GE4 vs. JTF17 Sonic Cruiser Concept Analysis Span-Distributed Loading Cargo Aircraft Boeing - Planemaker to the World High Velocity Jet Noise Reduction Biographies/Personal Accounts Fulcrum: A Top Gun Pilot's Escape from the Soviet Empire, by Alexander Zuyev MiG Pilot: The Final Escape of Lt. Belenko Boris Chertok Memoir Link to English Translation Memoirs of an Aeronautical Engineer: Flight Tests at Ames Research Center: 1940-1970 The Problem of Space Travel 1928 by Slovenian Engineer Herman Potočnik General Kenney Reports, a personal History of the Pacific War By George C Kenney: Darker Shades of Blue Rockets and People, by Boris Chertok Pierre Sprey gets dunked on
  9. LostCosmonaut

    Competition: Tank Design 2239

    An end date of September 30th sounds good to me, that should give people time to do research and do modeling and shit.
  10. LostCosmonaut

    Competition: Tank Design 2239

    Thanks for joining, and welcome to the forums! In response to your questions, and a few I've been asked by other people; The standard grade of gasoline is 87 octane (Some prewar refining capacity survived, and kept making fuel for prewar automobiles. Even though there's new-build refineries now they've decided to stick with 87). Most diesel is actually biodiesel, so the cetane ratings are a bit higher than expected. The current gun calibers in service are 20mm, 40mm, 55mm, 80mm, 95mm, and 120mm. However, since we're assuming a new gun is going to be developed, don't limit yourself to just those calibers. Things that aren't available at the current technology base: computerized FCS, ATGMs (electronics just aren't advanced enough for anything except maybe an X-7 clone). Manufacturing capabilities: The Cascade Republic's ability to cast steel is pretty good; test castings up to ~35 tons and the size of a medium tank hull have been done. Likewise, RHA up to about 6 inches thickness is readily produced. A big limitation is stamping; something like the stamped T-34 turret isn't readily producible (though the cast version is). Plastics are at about early 1950s technology; notably aramids like kevlar and nomex aren't in production (though they are known obviously). Tungsten is available (there are mines in Canada, controlled by friendly nations). DU is not (what can be salvaged from prewar isn't enough for any real use, and gotta have EU to make DU). Any publicly available research from prewar (OOC: now) can be used. If you want to crack open Technology of Tanks and distill it into a CAD model, feel free. Let me know if you/anyone else has questions. Also, a big thank you to Loooser, Jeeps, and Zyklon for judging.
  11. LostCosmonaut

    Competition: Tank Design 2239

    Also going to relink this post from the last tank competition;
  12. LostCosmonaut

    Competition: Tank Design 2239

    1. The previous tank was the Light Tank M6, plus various unofficial nicknames. 2. Time for bullet points California In service Heavy tank / heavy towed anti-tank gun: 89mm (3.5 in) gun with ~140mm RHA pen at 100 meters, ~80mm using HEAT Much less common than medium / light guns Medium tank / medium towed anti-tank gun: 70mm (2.75 in) gun with ~100mm pen at 100 meters, ~55mm using HEAT Light tank / light towed anti-tank gun: 51mm (2 in) gun with ~75mm pen at 100 meters Anti-tank rocket: 70mm diameter warhead, ~90mm penetration, effective range ~200 meters Common infantry anti-tank weapons In development Improved 89mm gun with ~160mm pen (likely to be used on next generation Californian heavy tanks in early development) Very heavy towed 108mm (4.25 in) gun with ~215mm pen at 100 meters (also to be used for indirect fire) Improved 70mm gun with ~125mm penetration (expected to be used on next generation Californian tanks in early development) Improved HEAT warheads with penetration up to 1.5 diameters when fired from existing rifled guns Improved 70mm anti-tank rocket with ~110mm penetration Deseret In service Heavy armored car armament: 57mm (2.25 in) gun with ~75mm pen at 100 meters Medium armored car armament: 30mm autocannon with ~55mm pen at 100 meters Most common vehicle armament, also used by Deseret's small force of light tanks Anti-tank rocket: 76mm (3 in) rocket with ~60mm armor penetration (HEAT), effective range 400 meters Most common infantry / cavalry antitank weapon, also limited use as vehicle mounted weapon Medium 90mm recoilless rifle with ~75mm penetration Towed, also vehicle mounted Anti-tank rifle: 20mm single shot rifle with ~40mm penetration at 100 meters Being phased out in favor of anti-tank rockets, retained for use against lightly armored targets In development Lightweight 76mm gun with ~90 mm penetration, for use as mobile artillery, heavy armored cars, and next generation light tanks Improved antitank rocket with ~90mm penetration, coupled with longer range and shorter flight time Heavy 120mm recoilless rifle with ~155mm penetration (HEAT) Both towed / vehicle mounted (multiple to be mounted on wheeled anti-tank platform in development) Common to both nations Heavy machine gun with ~25mm penetration (it's an M2) Various other weapons with limited / situational anti-tank capability (mortars, fragmentation/high explosive grenades, incendiary devices) Mines
  13. This is the official thread for discussion of anything related to skiing/snowboarding on SH. If you like throwing yourself down a frozen mountain, or are at all interested, this is the place. My personal experience: I mostly ski in the northeast (New York / Vermont), have never tried snowboarding. All my experience is at resorts, so if you want to know more about crazy backcountry shit I might not be able to answer 100% (though I am seriously considering heading to Tuckerman Ravine this year). Basic advice: Wear a helmet Rating systems are uniform everywhere, what's a black diamond somewhere might be a blue at a more hardcore place. Anything above black diamond (and especially above double black) is as much marketing as difficulty rating. Difficulty depends on conditions Wear a helmet Taking a lesson your first time is probably a good idea Make sure your boots are properly fitted Resources: http://www.skibum.net/ Site with a bunch of general info about skiing, and has little blurbs/ratings about a whole lot of American ski/snowboard places, grouped by state (surprised how many midwest states have ski places). Has a pro-ski / anti-snowboard tilt. https://www.liftopia.com/ Deals on lift tickets (it is an expensive hobby, especially if you go to Aspen or Vail) http://nyskiblog.com/ Blog about New York skiing http://forums.alpinezone.com/forumdisplay.php/10-Northeast-Skiing-and-Snowboarding-Forum Forum about skiing in the Northeast https://www.tetongravity.com/forums/ General skiing forum, but has more of a western audience. Also appears to have a vibrant shitposting culture. http://mountainvertical.com/ Shows de-marketified vertical ratings for each mountain. Vertical (distance from top to bottom) is a big deal for marketing, and there's a lot of ways to fudge it. http://www.goremountain.com/ http://www.whiteface.com/ The two places I go most often. Whiteface has more vertical and longer runs, but is farther away and is often windy and iced over. Gore is closer, less crowded, and sometimes has better conditions. http://timefortuckerman.com/ Site about Tuckerman Ravine, one of the holy sites of Northeast skiing. https://www.youtube.com/channel/UCzmlnH8vDQHoEb2TrC0WDCg Jerry of the Day Pic at the top is from the summit of Whiteface about a year ago.
  14. LostCosmonaut

    The SH Ski/Snowboard Thread

    Where you planning on taking her to start? I keep trying to drag my coworkers who don’t ski to the little 400 vert hill near me, but they are reluctant.
  15. Reading through the whole thing would be quite an achievement ( @Collimatrix Can tell you after he broke the forums that one time) Also paging @LoooSeR and @Bronezhilet to the thread.
  16. LostCosmonaut

    Competition: Tank Design 2239

    Yeah, power density was the main thing I had in mind. @Toxn I’ll reply to you once I’m not using my phone on lunch break
  17. Don’t worry, there’s hypocrites of all types! https://www.nytimes.com/2018/08/13/nyregion/sexual-harassment-nyu-female-professor.html
  18. LostCosmonaut

    Competition Topic Suggestions

    Agreed, I’ll knock together a more detailed scenario when I get home, glad to see the general concept has been positive received though.
  19. LostCosmonaut

    Bash the F-35 thred.

    I haven't read all of it yet, but I like the part where he claims that the F-4, literally the internet meme plane for "bad dogfighter designed without a gun", was designed with an internal gun. Also, wasn't Pierre Sprey or one of those other dudes really into wing loading as the end all be all of aircraft performance?
  20. LostCosmonaut

    Competition Topic Suggestions

    Got an idea for a tank design competition, might be a bit of alternate history junk, but I'll see how it goes; It is the year 20XX. It has been XX years since a nuclear war destroyed much of the world, causing severe damage to the industrial base. You are an engineer in <country>, tasked with designing a new tank for your nation's armed forces. While your country has knowledge of prewar tank developments (such as the M1, T-14, etc.), your nation's industrial base is insufficient to use manufacturing techniques more advanced than late 1930s / early 1940s technology (what exactly this means requires me to do a bit more thought). Basically, a cheap way of getting around that any of the tanks from "design a tank for world war 2 country in 1938/1941/1944" end up using what we already know from hindsight and don't look like something that would have been made in that period.
  21. LostCosmonaut

    Aerospace and Ordnance discussion/news.

    Virgin investing in a vaporware product is unexpected (how many years ago were suborbital tourist flights supposed to start?). JAL showing interest gives me better hopes there might actually be something to the project. Have they decided on an engine yet? Not like they can just phone up P&W and order some F119s.
  22. Everyone's getting on the reusability train! This is a good idea though, now that it's been proven that landing stages (at sea or on land) is feasible, I'd be surprised if any new projects from this point forward didn't incorporate it. Aside from maybe any very small launchers that get built. It boggles the mind that Vulcan is just going with catching the engines (and to my knowledge haven't done any actual testing on it, SpaceX had the Grasshopper for a few years before landing F9).
  23. As a former resident of New Jersey, this pleases me. How the fuck Menendez didn't get thrown in prison is a mystery (no it isn't). Unfortunately, you now know, after seeing that.
  24. LostCosmonaut

    The Meteorology Thread: Hector Lives

    Tropics are putting on a big show in the Pacific. Hector is near Cat 5 and will brush Hawaii (shouldn't be too bad); (satellite resolution is bad because GOES-16 is at a pretty high angle, it's meant for storms further east) Meanwhile, John is rapidly intensifying and murdering Ileana;
  25. For discussion of all sorts of weather and weather related phenomena. Post cool shit, or just talk about what it's like outside. First, here's a cool pic of some sprites; Also, we're just now starting to get into hurricane season (although it actually began about 5 months ago with Hurricane Alex)! The US has dodged a lot of bullets recently, there hasn't been a landfalling major hurricane in the US since 2005. The biggest story in the Atlantic for 2015 was Hurricane Joaquin, which reached category 4 intensity over the Bahamas despite its unusual method of formation, and sank the cargo ship El Faro; The East Pacific had Hurricane Patricia, which produced the highest winds ever recorded in a hurricane, and the lowest pressure ever recorded in the western hemisphere (872 mb) Side not, California hasn't been hit by a hurricane since 1898. Maybe this is the year they'll get unlucky!