Recent content by Shortround6

Quite true. The Core for the 75/55 ammos was just about 2lbs so roughly 900 times what your estimate of the 7.9mm core? Not going to argue about a few percent or even 10%. The 7.9mm AT rifles was one of those expensive toys. The early non Tungsten core round was the one that had the tear...

April 1945, XP-42 was flying with an all moving tail (horizontal stabilizer). I don't know what the goal of the test was, high subsonic flight or some other goal but this well before the X-1.

A short timeline of the Mustang I and P-51 no lette, cribbed from AHT. Bill Marshal very likely has much more/better information. Oct 24th 1941, First Mustang I arrives in England. Nov 11th 1941, four more arrive in England. Jan 1942, Mustang I production peaks at 92 per month. April 1942...

The Lycoming IO-360 makes 200hp in certified form, which gives 0.55 hp/ci (up to 220hp for experimental: 0.65 hp/ci). Gives some idea of what modern aircraft engines are giving out. We don't really know what a "modern" reciprocating engine can really do because we stopped developing them in the...

Since the IG 37 doesn't seem to show up until 1944 I would appreciate any reference that says otherwise. This just when it seems to have shown up, not that it could not have been done before. The IG 37 sources can't seem to agree with themselves, let alone each other...

The almost 400m/s performance doesn't show up until late in the war. A substitute for the taper bore guns needs to be ready in 1940/early 41. The IG 18's first HEAT shell was the one that had 260m/s velocity and had the 45mm at 30 degree performance. Used a powder charger of 71g. It took a...

True but the short 75mm was actually a pretty poor AT gun and it also shows the problem with trying to figure out what German HEAT shells could do when. The first HEAT round used in the IG 18 (same ammo as the IG 37) in 1940-41 was only good for about 45mm of penetration at 30 degrees. Later...

Allison had a hard time with a better supercharger for the Allison and the USAAC wanted a crap load of Allison's yesterday. Not really Curtiss's fault. It worked out the the British. The Germans went to night bombing and the daylight battles were pretty much put on hold. But just like the...

Are those metric Vise Grips and adjustable wrenches?

R-1535 didn't even make good power for it's displacement ;) Everybody dismisses the P-40 as a poor performer. But if we are looking at a 'design' we have to ask why? If P-40 can run with a MK V Spit or a Ki-61 or the Reggiane Re.2001 Falco WHILE carrying an extra 1000-1500lbs how bad was the...

A bunch of people used the German 37mm carriage and some of them mounted new barrels on them. Not hard as the German 37mm was one of the weaker non French 37mm guns around. Perhaps there was room for a 45-47mm gun that fit between the 330kg 37mm and the 970-1000kg 5cm Pak 38? Although it...

I have said the V-1650-1 powered Mustang would be better, but the P-40Fs already exist. P-40s are still too heavy. P-40Ls never got any of good weight reduction stuff that the P-40Ns got (aluminum radiators, oil coolers, wheels, etc) taking out a couple of guns and one of three internal fuel...

I actually agree with you. Just trying to point out the German thinking. The Germans designed and built a huge amount of rather interesting but not practical military "toys" that sucked up engineering and manufacturing capacity. Problem with the French guns are two fold. 1, Not invented here (...

Going back to No. 3 again. Heat shells don't have a lot of killing power inside a tank unless they really overmatch the armor. British No 68 rifle grenade. Now since the "effective" range was only about 70 yds and the troops were advised to let the tanks pass them by and shoot at the rear of...

True but the Soviets were using thousands of T-26s, BT-7s and T-60s well into 1942. Production of T-70s continued into 1943. Although the T-70 is a lot tougher on the front. For world wide use see Italian, Japanese and even American light tanks (M3 Stuart). Nobody expects light AT guns to stop...