Recent content by thrawn

Some people are mixing expectet engine life time with reliability. It is right that an unreliable engine has an shorter average lifetime than an reliable. But to assume a short life engine is unreliable is simply wrong. If we assume a gaussian normal distribution with the peak at 20 hours...

Since i've been there a few years ago, i can tell they have soviet tanks also. Most of these were used by the former NVA (Army of east germany). From t-34 to t-72, its all there. IIRC also some british tanks and some american. They took what they can get . There are also many small arms and...

Maybe i didn't made my point clear enough. I want a definition of mobility. What are the characteristics of mobility? i.e. what must a tank could do, to be mobile. If we have these characteristics, we can determine how these can be technically achieved (power to weight, torque, ground...

This is not a real characteristic of mobility. If so, a stationary power generator would be highly mobile. Agreed. Agreed. This alone is also no real attribute of mobility, but the result is. namely good cross-country ability. Agreed. Yes, for the most part i agree. To sum it up...

alejandro, for clarification, can you please post your definition of mobility? i.e. what charateristics are a must-have for tank to rate it mobile in your opinion? regards thrawn

max. Torque at 70% of rpm. 100% = 3000 rpm 3000rpm * 0.7 = 2100rpm. Soren is right.

It seems that this is a completly other turret, than the one with the many holes. The Tiger 2 with the great number of shots had a Zimmerit coating, the one with the 122mm holes numberd 1 and 2 didn't. btw, the last tank with the 122mm holes looks like a Panther turret... Regards thrawn

Hi Juha, at the end of the war it seems most piston-engined aircraft projects uses annular radiators in Germany. One reason is the "Einheitstriebwerk" solution by the RLM, i agree, but on the other hand the radiator of the Do-335 is an unusual one, because of the excentrical location of the...

I think its interesting to compare the cooling layout of the P-51 to the Do-335. They are very similar in appearance and size. But, scince the oil cooling Flap is similar attached to the one in the P-51, the Do-335 had two main cooling flaps side hingend at the end of the fuselage. Another...

davparlr, i find it highly doubtful, that the xp72 can manage 480mph at SL too. I also think it is questionable that the Tempest II runs 416mph at SL. May I ask where you get this from? In comparison, the Fw190A-9, a smaller and lighter fighter than the Tempest II, is capable of ca. 370...

The Rechlin statement is from Dietmar hermann. Its written in his books about the Fw and at www.wwiiaircraftperformance.com as a comment to the dora charts. I think he is credible on this. But i think its possible that later the rubber seal was used, but no documentary was found yet. I also find...

Hi all! The engine gap problem IMHO occured to all 190d a/c, prototype or serial production. The reason for this gap is that the engine cowling was fitted to the engine. In flight the engine turns slightly (in the opposite direction of the prop,because of the great torque) in there elastic...

The problem ist, that these graph's at this chart are imho all calculated. There is no evidence, that in real these performance could be achieved. especially the "A-Lader als Bodenmotor" variant is highly doubtful, because it would need ca. 2400hp to reach 640km/h at SL. Its also very strange...

Hi Soren! Absolutley! With some changes, better materials, proper cooling, good maintenance and for short time periods, i had no doubt a Jumo213 could deliver 3500hp today. Its too bad that no more 190A's and D9's, 109's, Ta's with there DB's, BMW's and Jumo's survive. It would be great fun...

Hi Soren! 3500hp? On a test bed probably. but then the engine is dead. It could never deliver such a high output in operational service. Junkers developed at the end of the war the Jumo213J with four valve technology and many other changes, such as higher compression, higher rpm and it was...