Recent content by Bretoal2

Not Amiot(s) 354 (single fin) , but Amiot 351 (twin fin) . I believe the aircraft in the background on the far right is the Amiot 356-01 (2 Rolls-Royce Merlin X engines), with a particular shape for its fins. They were in Tunis-El Aouina on August 20/21, 1940.

"Two things are infinite: the Universe and human stupidity. But, for the Universe, I don't yet have absolute certainty" (Albert Einstein).

. I'm not saying that it was a very good fighter, I'm just saying that it was a very solid and sturdy airplane as the photo demonstrates: the structure is still almost intact after hitting buildings with multiple sharp corners. But also the Bloch 152/155 were undoubtedly better than their...

The Bloch 152 was a VERY sturdy airplane !

Exactly what I said. Fixed pitch (or ground ajustable - i.e. non adjustable in flight) is not suited for running at full rpm BOTH on ground and rated altitude. And probably the high CR of engine (8:1) doesn't allow it, neither. Next Fiat 30-series engine (A-33 RC35) had a supercharger and...

No. About detonation, the main problem in the enormous capacity aero engines (20 x , 30 x or 40 x times a motorcycle engine....) is inlet temperature. See that ADI is injected in the induction circuit, not in the cooling system !

Yes, but losing some efficiency - or waisting some extra power. The best propeller is always the largest.

Two points : - As shown below, increasing the maximum boost on Merlin III gave better performance ONLY at low altitudes - see this graph: max speed at 18,500 feet is the same at 6.25 - 12 - 16 psi boost. Why ? Simply because these three numbers are just three different limiter setting, in all...

About data plate, don't forget this engine had a fixed pitch propeller. So, higher rpm when airplane has gained speed is normal. And yes, I wonder if this Fiat A.30 RA was able to sustain full throttle operation at sea level - I think the answer is NO, in fact ! This would explain why the...

I think that the manufacturer FIAT knew its engine much better than any Russian author... So here is the engine plate. We read that maximum power is 600 hp at 2600 rpm on the ground, and 550 hp at 2750 rpm at 3,000 m. (exactly what Jane's says). We also see that the normal engine fuel is a...

As I said above, the Jupiter VII is a second generation Jupiter, with "V" (not parallel) valves in a forged and entirely machined head. The Wasp had cast aluminium cylinder heads.

By the beginning of the 1930s, many engineers around the world had understood that the dimensions of the Jupiter (146 x 190 mm) were outdated, seeing that it was necessary to reduce its excessive stroke, and that the future was in the Mercury (146 x 165 ). The Kotobuki goes in this direction...

I think your "Beute, captured Balkenkreuz" must be a Bf 108 Taifun. Note, among other things, the thinness of windshield central mounting, and the handle just above.

Ooooooh !!!!! I did not see a "little" detail on pic #1 : on rudder is written "Potez 637" !!!!!! And from this angle, you can't see the gondola.... A better look at some other pictures shows that photos # 17, 22, 24, 27, 31, 32 are Potez 630 with Hispano-Suiza engines and upper...

I don't see ANY Potez 637 in this thread... Many 631 and 633, yes, but no 637.... A true Potez 637 : https://www.passionair1940.fr/Armee%20de%20l%27Air/Appareils/Reconnaissance/Potez-637/Potez-637.htm Main caracteristic : ventral gondola.