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View Diary: The QF 6pdr Class M Mark 1 – the sting in the ‘Tsetse’! (48 comments)

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  •  Ohh, ohh, Ohh, I forgot the P-39 (4+ / 0-)

    It was designed around a 37mm 'cannon' firing thru the propeller hub.  Part of the reason it had a mid engine.  That 37mm was popular with PT boats too.  IIRC, PT-109 (JFK's boat) had one mounted when it was struck.

    “that our civil rights have no dependence on our religious opinions, any more than our opinions in physics or geometry.” Thomas Jefferson

    by markdd on Fri Dec 21, 2012 at 06:30:01 PM PST

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    •  The RAF took delivery of P-39s... (4+ / 0-)

      ...but they had a 20mm cannon rather than a 37mm. They were only issued to ONE unit, No. 616 Squadron, and were a total disaster!

      'Per Ardua Ad Astra'

      by shortfinals on Fri Dec 21, 2012 at 06:34:33 PM PST

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      •  I read about why they took (2+ / 0-)
        Recommended by:
        shortfinals, PrahaPartizan

        the turbochargers out of the P-39s, I think they were not terribly reliable early on, but another big factor was that P-39s were maybe a bit undersized. When they got all the necessary gear on them for combat, the weight went up and the performance went down.

        The Russians loved them, allegedly. But only used them at low level, as they pretty much didn't have much combat at high altitudes. Even their own higher-altitude designs got short shrift.

        I remember some stories about how they managed to get short takeoff performance out of P-39s, I think it was, if not others. Get them up to as high a speed as possible and then retract the gear whether lifted off or not. Kind of scare the plane into the air. Much like that IL-76 video from Australia a few diaries back. The russian word for air, "vozduch", is derived from "duch", meaning spirit. Lifted up by spirits, as it were. lol.

        Moderation in most things.

        by billmosby on Fri Dec 21, 2012 at 07:05:51 PM PST

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      •  Disaster ? (3+ / 0-)

             The Russians loved 'em.

        The free market is not the solution, the free market is the problem.

        by Azazello on Fri Dec 21, 2012 at 08:01:21 PM PST

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        •  The Russians kept them at low level... (2+ / 0-)
          Recommended by:
          Azazello, Otteray Scribe

          ....plus when the RAF fired the 20mm, it caused the repeater compass in the cockpit to go haywire! They were never able to sort this, and the LAST thing you want if you are making low-level sorties over France is a compass that is useless!

          There is a propaganda film telling cinema audiences how good the Aircobra is, but they were rapidly withdrawn.

          http://www.youtube.com/...

          The video portion comes after the first set of slides. You can see the thinner 20mm barrel on these aircraft. The codes 'UF' apply to the famous No. 601 (Couty of London) Squadron, Royal Auxiliary Air Force

          'Per Ardua Ad Astra'

          by shortfinals on Fri Dec 21, 2012 at 08:51:50 PM PST

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      •  Sorry, my bad - I meant 601 Sqn... (1+ / 0-)
        Recommended by:
        Otteray Scribe

        ...I wrote 616 because I was a member of 616 Squadron Association :)

        'Per Ardua Ad Astra'

        by shortfinals on Fri Dec 21, 2012 at 10:08:23 PM PST

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      •  RAF had the 20mm (2+ / 0-)
        Recommended by:
        shortfinals, Otteray Scribe

        P-39D, USAAC did have the 37mm.  I can't track thru the Wiki well enough to figure out what the Soviet ones had.

        “that our civil rights have no dependence on our religious opinions, any more than our opinions in physics or geometry.” Thomas Jefferson

        by markdd on Fri Dec 21, 2012 at 10:20:55 PM PST

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    •  P-63 Successor Liked by Soviets Too (2+ / 0-)
      Recommended by:
      shortfinals, Otteray Scribe

      The Americans supplied quite a few Lend-Lease P-63 fighters to the Soviets, who actually liked the airplane for its durability and firepower.  The P-63 was a successor design to the P-39 with a few extra refinements, but it was basically the same airframe.

      "Love the Truth, defend the Truth, speak the Truth, and hear the Truth" - Jan Hus, d.1415 CE

      by PrahaPartizan on Fri Dec 21, 2012 at 09:22:07 PM PST

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      •  The Kingcobra was 'similar' to the P-39, (3+ / 0-)

        ...but was larger all around and had many different systems. The Russians (who were very eager to receive the Kingcobra) were supposed to use it ONLY against the Japanese, but secretly used in against the Germans, too!

        The other main user was the Free French Air Force.

        'Per Ardua Ad Astra'

        by shortfinals on Fri Dec 21, 2012 at 09:53:11 PM PST

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