Recent content by stoxm73

The 15 X 69B is the only one missing the project in the following picture. The 15 X 83B is its big brother with a 57 gram project and a MV of 870 m/s. Both figure and data are from Williams' website.

I have not found the data for this cartridge yet. However, its project should share the same shape and weight with its two big brothers, which according to Williams' website is about 57 grams. If this cartridge had the similar kinetic energy with the American 0.50, then it would have a muzzle...

Since hemi-head has an excellent surface-to-volume ratio, minimal heat loss to the cylinder head, and room for two large valves. Besides, its spark plug locates at or near the center of the chamber to promote a strong flame front. Theologically, these allow squeezing more power from the same...

Spitfire, P-35, and Re.2000 adopted the elliptical profile. Were their wings really able to reduce the drag, and consequently edged their rivals like bf-109?

The Madsen 11.35mm round weights 70-80% more than a regular rifle round, indicating it can accommodate more incendiary charge. Theologically, this gives a better chance to smoke the opponents. On the other hand, since this round has almost identical length to 30-06, it should be compatible with...

I am thinking that whether some improvements on high-lift device, such as apply Fowler-flap, can significantly boost the maneuvering capability of these two. Can the P-36 match in tight-turn of Zeke/Oscar after this kind of modification?

Thanks for the reply and link.

They both used similar engines ranging 900-1200 hp They both were armed with 0.50 The mid-wing on buffalo theologically contributing a bit more maneuvering capability than the low-wing on P-36 The buffalo looks rugger than P-36 The P-36 had an edge on power/mass and wing loading So which...

Hemi-Head, Desmodromics, and fuel injection are not new technologies. They are all initiated before 1930.

HS-12Y looks very promising when it was first run in 1932. However, its later development left far behind its peers like PV-12, V-1710, and DB601. If it could get enough funding and applied some new technologies such as Hemi-Head, Desmodromics, and fuel injection. The Hemi-Head cylinders will...

According to Airpower and Industry, the British policy during the 1935-1939 was to keep the promising designs as many as possible.

The mine HE from German 20 mm is a real challenge to the spitfire's air-frame

The Vickers applied the geodetic structure on their Wellington bomber in the 1930s. However, such structure had never applied on the fighter. Since the light alloy lattice-work gave a light structure with tremendous strength, it is possible that a lighter and sturdier spitfire could be...

So, the LERX can improve the turn performance? Thanks

The vortex appears at 00:30-00:50 This one seems making vortex on turning, not on high AOA. Can the LERX improve the turning-rate of an aircraft?