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Post by shorty on Feb 8, 2019 11:15:23 GMT 12
"recovered from New Guinea by Tallichet’s team" Shorty, another of your recoveries? The Tadji P-39s were P-39Q 42-19991, -19993, -19995, -20007, -20339, 44-2438 P-39N 42-19027, -19034 I don't have the serials of the ones from TsiliTsili or the other places
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Post by baz62 on Feb 8, 2019 14:54:12 GMT 12
Doesn't the engine drive shaft run through a gear box, with drive line change to the prop?. Might be the gearbox winding down? Correct. Basically the reduction gearbox that normally sits on the front of the Allison is mounted where it normally sits in the nose and the drive shaft extends from the crankshaft output on the engine to the gearbox. I would say the noise from the gearbox is absorbed somewhat when mated to the engine so I believe it is the gears you can hear.
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Post by FlyingKiwi on Feb 8, 2019 19:42:37 GMT 12
That would make a lot of sense. It's certainly a unique sound.
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Post by ZacYates on Feb 9, 2019 19:14:36 GMT 12
That it is. I expected it to sound like a P-40 but that whine gives the P-39 an exotic edge.
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Post by Dave Homewood on Feb 9, 2019 19:16:58 GMT 12
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Post by ZacYates on Feb 19, 2019 18:40:50 GMT 12
Paul McSweeny has uploaded a new engine run video:
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Post by johnnyfalcon on Feb 19, 2019 19:08:04 GMT 12
OH YUM!!!
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Post by Dave Homewood on Feb 19, 2019 19:14:26 GMT 12
It has done a high power run with the cowls on now too. See the Warbirds Facebook page for a film.
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Post by planecrazy on Feb 19, 2019 20:15:39 GMT 12
So cool to see something different, sorry for the newbie question but wondering about cooling and the location of the radiator/s is that the intake in the wing root?
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Post by Brett on Feb 19, 2019 22:22:59 GMT 12
The radiator is under the engine.
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Post by planecrazy on Feb 20, 2019 8:14:18 GMT 12
Thank you she really is quite different, a break away from the machines of the time, wonder what at why the thinking went mount the motor back there, was it all only to get the big gun in her?
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Post by davidd on Feb 20, 2019 8:58:01 GMT 12
No, the designer (by name of Wood or Woods, cannot recall his given name, but he was quite a solid fellah) thought that placing the engine at the centre of gravity (if not lift) might contribute to making the aircraft more manoeuvrable; don't think it quite worked out that way, but that is my understanding of the design philosophy. However there was also a supposed propensity for the P-39 to go out of control and to "tumble" in flight if severely provoked by violent use of controls, but others reckon that was a myth. Also notice in the exploded diagram above that there was a two-man life raft provided - would like to know the reasoning behind that one, or did not the USAAC have a one-man dinghy at this time? And note that cannon shell capacity was only 30 rounds - could that be right? I suppose it is. David D
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Post by angelsonefive on Feb 20, 2019 11:19:26 GMT 12
The life raft was probably a droppable one, intended for the use of ( in the words of the old hymn ) "... those in peril on the sea."
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Post by saratoga on Feb 20, 2019 16:25:04 GMT 12
The 37mm cannon only had 30 rounds, loaded in the 'elliptical' magazine around it. This was actually like a conveyor belt, the rounds separately loaded in, so no separate belt link as such. These 37mm cannon were also used on the PT boats as deck guns, still retaining the same elliptical magazine. The 20mm Hispano's when fitted retained their standard drum mags, so would have a few more rounds but less hitting power. The 37mm were slow firing so chances of getting a hit, once lined up were less likely. But if you did, more catastrophic for the target. Always a trade off!
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Post by davidd on Feb 21, 2019 13:18:40 GMT 12
Was the 37 mm cannon used on many P-39 variants, or were most fitted with the more useful 20mm? I am fairly certain the P-400 (RAF version) had the 20mm as much more reliable. David D
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Post by Brett on Feb 22, 2019 8:23:50 GMT 12
C of A received. Test flying to start next week - weather dependent.
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Post by skyhawkdon on Feb 22, 2019 10:30:30 GMT 12
It won't be at Masterton then...
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Post by isc on Feb 22, 2019 13:28:51 GMT 12
From the weather forecasts I'v heard there might not be anyone at Masterton, it's supposed to get a bit grotty. isc
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Post by ErrolC on Feb 26, 2019 13:24:01 GMT 12
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Post by ErrolC on Feb 26, 2019 14:19:55 GMT 12
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