BETA PATCH v.1.08.18956 - August 3, 2012

[CaptainDoggles]

Originally Posted by macro

500 - 1000 feet

http://lmgtfy.com/?q=tas+ias+calculator

[macro]

so even at different temperatures, 0-25C the TAS is 265-277mph at 500ft (if i did that right?)

The A.&A.E.E. trials of N.3171 resulted in level speeds of 283 mph at sea level and 354 mph at 18,900 feet with the Merlin engine operating at 6.25 lbs/sq.in., 3000 rpm. 1d For comparison, Spitfire Mk. I R.6774 equipped with de Haviland Constant Speed Airscrew and armoured windscreen achieved 288 mph at sea level and 355 mph at 17,800 using 6.25 lbs/sq.in., 3000 rpm. The similarly equipped Spitfire I R.6770, except fitted with 2 cannons and four Browning guns, reached 358 mph at 18,000 ft. The Royal Aircraft Establishment (RAE) obtained 314 mph at sea level and 359 mph at a full throttle height of 11,500 feet using +12 lbs/sq.in. boost.

seems slow to me

[jimbop]

Yes, variation between IAS and TAS is minimal, maybe 5 mph.

I had a play in the Spit IIa just now and couldn't break 275 at 1000 ft. I don't know what is historically accurate but it sure doesn't feel anything like it as fast as the last time I tried it (a few patches ago).

[Kwiatek]

For sure RAF fighters are too slow at low level ab. 20-30 mph ( didnt check higher alts so dunno about it).

109 is also too slow at the deck but about 20-30 kph.

[macro]

i seem to be having more luck in the spit mk 1 (2 stage prop) now lol