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Showing content with the highest reputation on 07/23/2021 in all areas

  1. Some detail on the hull faults on AJAX: - inconsistent lengths - hull sides not being parallel - substandard welding - etc
    4 points
  2. https://www.defensenews.com/land/2021/07/23/us-army-chooses-competitors-to-design-infantry-fighting-vehicle-replacement/ Point Blank Enterprises,Oshkosh Defense, BAE Systems, General Dynamics Land Systems and American Rheinmetall Vehicles
    1 point
  3. Stolen from otvaga, tankoff did a summary post on Arena systems. Arena (1993) patent: 1 are countermunitions in their launchers, placed around turret. 2 is radar station on top of the turret. Arena-M APS with correctable trajectory countermunitions: Compared to previous version much less countermunitions and launchers are used, subsystems are more compact. Less weight, statistically less vulnerable to fragmentation damage. Countermunition schematics. CM is connected to launcher with a wire, BTW. Patent for BMP-3 equipped with Arena, pic showing possible use of APS as a system to automatically turn turret of AFV in the direction from which AFV was shot at. Looks like Arena was offered to Germans in 90s. Pics from Wehrtechnisches Symposium, 1995. One of first article about Arena, 1996. 2012 - model of Arena-M (or Arena with correctable countermunitions) was shown. At RAE-2013 T-72 with shown with similar system, but with some additional changes. Arena-E with correctable countermunitions, video by KBM. 50m detection range, minimal reaction time - 0.04s, same direction is covered by at least 2 countermunitions, can intercept incoming projectiles with speeds of 70 to 1000 m/s. Can work of 8 hours without stops, weight - up to 900kg. Laser sensors (same as on Shtora) can be part of Arena. APS can be intergrated into BMS. Countermunition launch. Small holes just under cap/cover probably are impulse jets to rotate countermunition after launch. Upper schematics proably shows those impulse jets. Launch. Question if it is actually capable of intercepting top attack threats in configurations shown to public is still open. Max detection range is 50 meters, but how much radars can see "up" is question that i don't know answer for. Vertically aimed launchers suggest that at least ATGM that "overfly" target (like Bill 2 or TOW-2B) are covered by modernised system. Original Arena (at least in 1995 config) was not capable of intercepting overfly ATGMs. Another question without answer is how much "correction" measures can change facing of countermunition. Against top attack threats there were ideas to place CMs nearly horizontaly and aim them upwards.
    1 point
  4. Although this looks like civilian one , it looks like there are add on armor panels on front doors , folding rotors also hint towards shipborne use Again new composite fuselage Figures presented at MAKS indicate that that maximum speed rose to 134kt (250km/h), up from 118kt; range grew to 302nm (560km), from 260nm; while payload for the 3.6t helicopter grew to 1,000kg (2,204lb), up from 785kg.
    1 point
  5. Seems like there is some new developments with helos as well Mil 171 'Gazprom' looks like completely new machine combining new fuselage with Mil28 power train and rotor system. Will it also end up as cheap alternative to Mil 38 for the military? Considering how smooth it is i gather its mostly composite construction which should also saved some weight
    1 point
  6. Laviduce

    The Leopard 2 Thread

    Regretfully, I have not done a full CAD model on the Leo 2 (yet), so I can not tackle the volume/mass distribution from that angle in any meaningful way. Here are numbers coming from German and Swiss sources/publications (some of them are somewhat contradictory): This is for a Leopard 2 with B-Technology special armor, as far as i know: Total Combat Weight: 55,15 t / max: 55,55 t Hull without ammunition, equipment and crew: 37,80 t / max: 38,16 t Hull Shell: 12,1 t Turret with armament but without ammunition, equipment and crew: 16,0 t / max: 16,99 t Turret Shell: 8,91 t Main gun with breech: 1,97 t (1,995 t is also given) Main gun without gun mantlet: 3,10 t Main Gun Tube: 1,20 t Engine (dry): 2,71 t (with air filters) Transmission with cooling unit (wet): 2,97 t Powerpack including cooling unit (wet/dry): 6,05 / 5,61 t Tracks: 2,70 t Mass of fuel: 1,03 t Mass distribution in %: Electronic Equipment, Equipment, etc: 7% --> 3,86 t Armament and ammunition: 8% --> 4,41 t Powerpack with fuel:15,5 % --> 8,55 t Running gear/Suspension System/ tracks: 21, 5% --> 11,86 t Turret and Hull Shell: 48% -->26,47 t (this is odd) For the Swiss Panzer 87: Combat Weight: 56,5 t Turret weight with gun: 16 t Powerpack (wet/dry): 6,12 / 5,57 t Engine: 2,86 t Transmission (wet/dry): 2,45 / 2,17 t Suspension arm with / without damper: 0,226 t / 0,182 t Torsion bar: 0,059 t Return Roller: 0,025 t Idler Wheel: 0,034 t Idler Wheel arm: 0,11 t Bump Stop: 0,012 t Track link mass: 0,033 t Tracks: 2,75 t More on the gun system: With mantlet: 3,655 t (max 3,8 t) Without mantlet: 3,015 t Mantlet: 0,640 t Gun, Total: 1,905 t Gun Tube: 1,150-1,175 t Gun breech: 0,683 t Gun breech block: 0,110 t Bore Evacuator: 0,0135 t Thermal Shroud Front: 0,0135 t Thermal Shroud Back: 0,0128 t I might find more, but this is it for now.
    1 point
  7. Some footage of the export K2 Black Panther doing some high speed tests in Oman
    1 point
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