Quote:
Originally Posted by delcyros If You trace that 350 mp/h figure down it comes from a He-177 Schiffer book. Those Schiffer books have never been reputated for reliability altough in this very topic they were correct. However, there is something different:
The 350 mp/h were flown at "Erhöhte Notleistung"-powersetting (something like WEP + injection. Only suitable for less than a minute in DB 610´s without risking an engine failure or worser: engine fire) in level flight by an He-177AV prototype stripped down from defensive armement and without payload except for minimum fuel load. So this figure isn´t represantative for the He-177 in usual bomber configuartion.
The He-177A5, the mostly used bomber variant had a top speed of 440 Km/h (273 mp/h) sustainable for 30 min.+ at "Steig- und Kampfleistung"-powersetting (100%). Using the "Start- und Notleistungs"- powersetting (WEP or 110%) the He-177A5 could be accelerated to 488 Km/h (303 mp/h) max in level flight. This speed was flown at Rechlin during several testflights with defensive armement but without bombs at 3/4 fuel load (for normal range).
Hope, this helps. |
Interesting and good info, which Schiffer book is that exactly ?
A sidenote on power settings, of course the max speeds are understood for Start u. Notleistung, or as it was earlier called on the DB 601/606 engines, erhöhte Notleistung. These power settings were of course, only allowed for a couple of minutes, by Allied terminology this is WEP power setting.
However it should not be forgotten that every other bombers listed top speed, say a B-17s, is
also given with using the WEP limited to a few minutes. So it's comparable, even though it's not a very useful speed for a bomber, considering especially formation flying and fuel economy issues (range!) that meant that bombers usually cruised at far less then their top
speeds.
Continous maximum and economic cruise speeds are far more interesting IMHO.