No joke: 248mph Hurricane dh5-20, 230mph Spit... what on earth is going on??

[ATAG_Dutch]

Thanks Momod. I've done a lot of testing recently, and quite honestly I'm glad other people have 'taken up the baton' as it were!

This is as it should be, the 100oct should only have improved performance up to a certain altitude, which I forget at the mo.

The whole issue though, brings the problem of altitude inaccuracies in the game back to the fore. The fact that none of the aircraft can achieve documented operational ceilings makes one wonder how the 'atmosphere' is modelled. So the performance we get at 17.000 may reflect RL performance at 25,000 or something like that. This is one of the reasons I've done most of my testing at low alt. I don't trust the 'atmosphere'.

That still doesn't explain the DH5-20 Hurri being so much faster than the IIa however, at any height!