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Showing content with the highest reputation on 03/28/2018 in all areas

  1. 3 points

    The Leopard 2 Thread

    Hi Xoon, I do not have all the information you requested but this might be of interest. According to Krapke: For the Leopard 2(A0-A4) the gun laying system or Waffennachführanlage (WNA) is known as H22. It is a electric-hydraulic retarder control eqipped hydrostatic motor where an electric motor powers a coaxial piston pump which pumps the hydraulic fluid out of the reservoir into hydro storage cell. Here is the diagram of the WNA H22:
  2. 1 point

    CW-21: KNIL Interceptor

    During the late 1930s, the Curtiss-Wright corporation was a major source of aircraft for both the US military and export customers. One of their most famous models was the Hawk 75 (also known as the P-36), which saw extensive service with the Americans, French, Finns, and others. This design would evolve into the famous P-40, which was then followed by a series of much less successful designs. One of their less well known designs was the CW-21. The CW-21 was derived from the earlier, unsuccessful CW-19 civilian aircraft. It was designed by the vice president of the St. Louis branch of Curtiss-Wright, George R. Page. Page's design went against the grain of American fighter design of the time, which focused on low level performance. Instead, it was designed to climb rapidly to altitude to intercept bombers, using its superior climb rate to evade escorting fighters. As can be seen from [url=http://sturgeonshouse.ipbhost.com/topic/1533-trade-offs-in-wwii-fighter-design/]this[/url] topic, climb rate is dependent on thrust (engine power), weight, and drag. Early CW-21. The early-model landing gear fairings are quite distinct. Page's design achieved an excellent climb rate by minimizing weight. The definitive CW-21B model had an empty weight of only 1534 kg, compared to 2076 kg for the P-36 and 2753 kg for the P-40. The light weight was achieved through heavy use of aluminum in the structure. Despite this, it still managed to fit a 1000 hp R-1820-G5 (Wright Cyclone) engine (compare to the P-36 and its 1050hp R-1830). A two-stage supercharger was fitted to the engine to improve performance at altitude. CW-21B in Dutch markings. The CW-21 first flew on September 22nd, 1938. At once, it achieved an excellent climb rate. Though claims that it could climb “a mile a minute” were exaggerated, it did demonstrate the ability to reach an altitude of 16400 feet (5000 meters) in five minutes. This was exceptional performance for the time. Many accounts give an initial climb rate in excess of 4,000 feet per minute, though this is not backed up by all sources. Top speed was 315 miles per hour at altitude, and the aircraft was reportedly quite agile. Armor was very light, although the pilot was provided with some protection. Armament was also decent for the time, though light compared to later aircraft. The CW-21B's that saw combat were armed with two M2 machine guns, and two M1919 machine guns, though some sources say they were fitted with four M1919s. No provision was made for the use of air to ground weapons. American forces never seriously considered using the CW-21. By 1938-39, the USAAF had several fairly new aircraft in service such as the P-36 and P-35, along with several others in development such as the P-38, P-39, and P-40. The CW-21's light structure would have made it completely unsuitable for carrier-based service. Instead, the CW-21's main customer, at first, was the Republic of China. By 1939, China had already been at war with Japan for several years (since 1931 or 1937, depending on one's definition of the war). The Chinese Air Force was horribly outmatched against the IJAAF and IJNAF, even with support from the Soviets. Desperate for modern fighters, the Chinese signed a contract for the purchase of three finished aircraft, along with parts for 27 more to be assembled in China. It appears the first three CW-21s arrived in Rangoon in early 1940. There, they languished until December 1941, due to bureaucratic delays, and the low throughput of the Burma Road. Then, the American Volunteer Group (better known as the Flying Tigers) attempted to fly the three aircraft to one of their bases in China. All three planes suffered engine failures partway through the flight (likely due to bad fuel); one pilot was killed, and all three CW-21s destroyed. Indications are that the Chinese built at most two CW-21s from the parts provided. Little of substance is known about their use in combat. The CW-21 was slightly more successful in Dutch service. In early 1940, the Dutch government, conscious of the deteriorating situation in Europe, sought to improve its anemic defenses by any means possible. In April 1940, the Dutch government placed an order for 24 CW-21B aircraft (Several CW-22 Falcons, a trainer/light bomber derived from the CW-21, were also ordered. The Falcon saw a much larger production run than the CW-21, also serving with the US Navy as the SNC.). The German invasion on May 10th, 1940, derailed plans for the CW-21 to serve in the Netherlands. Instead, the aircraft were transferred to the East Indies to serve with the MN-KNIL. Lineup of CW-21Bs. All 24 of the crated aircraft arrived in Java by November 1940. After reassembly, they served with 2-VLG IV. Even before the start of the war with Japan, some issues arose. Structural problems became apparent, likely a result of the CW-21's light construction. In particular, as of December 1941, many aircraft were grounded by cracks in the undercarriage. Only nine CW-21s were operational when the war started. 2-VLG IV was dispersed throughout Java shortly after the conflict. It would take some time before the CW-21 saw combat. Despite several false alarms, they did not encounter Japanese forces until February 3rd. On that day, the Dutch CW-21s (along with a mixed force of P-40s, P-36s, and Buffaloes) encountered a large group of A6Ms over Java. Against the well trained and experienced Japanese pilots, the CW-21s came off poorly. Three Zeroes were shot down by the CW-21s, in exchange for the loss of seven planes (with several more damaged). This action seriously depleted the strength of 2-VLG IV, and it was soon sent to western Java to rearm with Hurricanes. Four more CW-21s were lost to Japanese aircraft on February 24th. The last confirmed use of the CW-21 was on March 3rd, when three of them escorted a group of Martin 166 bombers against the captured Kalidjati airfield. At least one CW-21B was captured and tested by the Japanese; it was found in Singapore by returning British forces in 1945. No CW-21s are known to have survived following the war. Photos from Dutch archives An interesting exercise is to compare the CW-21 to one of its contemporaries and opponents, the Ki-43 (“Oscar”). The Ki-43 first flew in early 1939, just after the CW-21's first flight. While the Ki-43 had a reputation for being quite agile, it actually weighed much more than the CW-21, with an empty weight of over 1900 kilograms, compared to roughly 1500 for the CW-21. Initial models of the Ki-43 had an Ha-25 engine with 975 horsepower (this would be improved in later version), similar to the CW-21. The Ki-43's armament was quite light, with only one 12.7mm machine gun and one 7.7mm machine gun (again, this was increased in later variants). Like the CW-21, the Ki-43 had a reputation for agility, but also for being quite fragile (a common trait of many Japanese aircraft of the time). On paper, the two aircraft seem similar, but the Ki-43 was more successful. This is in part due to its larger production run, but also due to the severe conditions the Dutch faced in 1941-42. The CW-21 is given the name “Demon” by many sources. However, it is likely that this is incorrect. There is no evidence that Curtiss-Wright ever used the name, indeed, most Curtiss aircraft of the time had names connected to birds in some way (Hawk, Falcon, etc.). One story is that the name comes from a crate which had “Demonstration” written on it, with the letters “demon” showing on one side. I have not been able to find what, if any, nickname Dutch pilots on Java gave their CW-21s. Model of CW-21 and Martin 166 in Dutch markings from; http://www.britmodeller.com/forums/index.php?/topic/234977846-netherland-east-india-1941-cw21-b10/ Sources: https://thejavagoldblog.wordpress.com/background-info-book-1/airplanes-2/curtiss-cw-21b/ https://www.warbirdforum.com/cw21.htm ^major source^ http://www.j-aircraft.com/captured/capturedby/cw-21/captured_cw21.htm http://kw.jonkerweb.net/index.php?option=com_content&view=article&id=718:curtiss-wright-cw-21b-interceptor-uk&catid=84&lang=en&showall=1&limitstart=&Itemid=546 https://www.ipms.nl/artikelen/nedmil-luchtvaart/vliegtuigen-c/vliegtuigen-c-curtiss-cw21/1112-curtiss-cw21-23-5.html https://www.valka.cz/13571-Curtiss-Wright-CW-21-aneb-americky-Interceptor-v-rukou-holandskych-pilotu-1-cast
  3. 1 point
    PKM have feeding system that our army don't use usually.
  4. 1 point
    I want Bud Light Guy Flipping Off Shooter interviewed on the alphabet channels!
  5. 1 point
    One of the early IS-7s had an external volute spring suspension because the hull had no room for any suspension elements.
  6. 1 point
  7. 1 point

    United States Gun Control Megathread

    This is what we call in the news industry "burying the lede". The headline should read "Reverend Al Sharpton's Brother Arrested for murder" with the lede of the story being "Reverend Kenneth Sharpton Glasgow", the brother of infamous civil rights firebrand Al Sharpton was taken into custody last night for suspicion of homicide." At that point you mention the some of the key details. The incident happened at the intersection of X and Y. The victim's name and age was so-and-so. A handgun was found on the scene or witnesses describe seeing Glasgow shooting out the back of the victim's car window. Authorities say the incident stemmed from road rage or whatever. Third or fourth paragraph should read "Ironically, Reverend Glasgow was involved in a march for life rally 36-hours earlier decrying gun violence. The remaining paragraphs should be background information which include a statement from the police spokesperson or district attorney. If there's any witness testimony include it now. Then you give background on the suspect himself. How long he's been in the community, his church, his congregation, and previous incidents where he's been in the news. At the bottom, again, repeat that he is Al Sharpton's brother. For photographs, the newspaper needs to use either a booking shot of the suspect, any footage of the crime scene that might be available - a shot up passenger car and police tape is always nice. If the story jumps from the front page to the back, then you include any file photo you have of Glasgow and Sharpton together. That's how you write a news story. Literally I can write up a 400 to 600 word story on this in well under an hour with the only delays being how long it might take to get phone calls back from a couple of quoted sources. And that's only because I used to ALWAYS insist on including quotes from individuals whom I've talked to in person or via the phone before they were included. None of that quoting Twitter bullshit.
  8. 1 point
  9. 1 point

    WoT v WT effort-thread

    Not surprising, I don't come cheap
  10. 1 point

    WoT v WT effort-thread

    Wow, that guy is really mad about a business doing businessy things.
  11. 1 point
  12. 1 point
    Your argument was that the M1 is so much better than everything else (except T-14) because it has an isolated ammorack, but your links showed that in only 2 out of 14 instances it made a difference. And from 1 of those 2 we don't know the specifics and the other one was one where the Iraqis screwed up and got flanked. If we're going to include hits with no injuries, it's 2 out of 22 instances where isolated ammo stowage made a difference. Actually, multiple of the injuries weren't even due to a penetrating hit, but due to things caused by a non-penetration. There are multiple reported injuries from the fire surpression system. So if you're an American M1 crew man you're more likely to be injured by the fire surpression system than be injured/killed by igniting ammunition. So basically, an isolated ammorack only helps if you're allowing yourself to get flanked and the enemy manages a direct hit and penetration on your ammorack. Which is not very likely to happen unless you fuck up. But according to you all other tanks, including (but not limited to) the Type 99, T-90M, Leclerc, Challenger 2, Leopard 2A7 and K2 are all pieces of shit you'll outright refuse to drive one into combat because they have no isolated ammo stowage.
  13. 1 point
    I don't think expanding gas works that way at all. If you have a container full of high-pressure gas that has two openings that lead to areas with lower pressure, and one of the openings is large and the other opening is small, the gas will escape through both openings. My evidence for this is the fact that gas-operated firearms work.
  14. 1 point
    We've had this link in the resources section for a while on TMEPS. The engine was not "a standard AGT-1500," as the document explains, it had a new high pressure turbine rotor, new high pressure turbine cylinder, new recuperator, new power turbines, a new electronic control unit and a new auxiliary power take off.
  15. 1 point
    Don't get run over by a drunken National Guardsman in an APC!
  16. 1 point
    man, things were so much simplier in the good ole days just siiting in the east German pines, starring at the great satan through binoculars, wondering when i could be relieved to go piss
  17. 1 point
  18. 0 points
    We've tried. His skin has developed thick dermis patches all over that is completely immune to small arms fire. In short, he's corny as fuck.
  19. 0 points
    Another thing he mentioned was that the younger guy in the car has a history of stirring shit up in Dothan. For instance, there was an officer-involved-shooting a few years ago of a mentally impaired person. He was a violent schizophrenic off of his meds. The police tried EVERYTHING to deescalate the situation, but it got dangerous for innocents and police involved and they had no choice but to shoot when faced with a deranged, violent, murderous individual. Who was also assaulting the police officers and had one of the police officers on the ground and was beating him to death. This guy then runs a smear campaign against the officer who killed this poor innocent black man in cold blood. Officer had to step down because of it.
  20. 0 points
    Just got a voice message from my buddy in Dothan, an EMT who knows who worked the scene.
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