For most of the the new additions:
Speed with WEP at 50 feet flying with 25% gas I measured with E6B:
337 mph for Spit Mk.VIII
343 mph for Spit Mk.XVI
359 mph for Spit MK.XIV
369 mph for Bf 109K-4
347 mph for Bf 109G-14
337 mph for Bf 109G-6
304 mph for Spit Mk.Vb
303 mph for Seafire Mk.IIc
Time to Climb, based on 300 mph at 50 feet for start to 10,000 feet are as follows:
Spit Mk.VIII: 1:44.72
Spit Mk.XVI: 1:38.38
Spit Mk.XIV: 1:44.69
Bf 109K-4: 1:43.19
Bf 109G-14: 1:45.72
Bf 109G-6: 1:53.79
Tested acceleration of Spit Mk.XVI. Time to accelerate from 200 mph to 300 mph: 30.88 seconds. For comparison, the Dora does it in 30.83 seconds and the Yak-9U needs 37.40 seconds....
In terms of handling, we flew lots of duels.
Spit VIII against Spit XIV: Spit VIII is superior in roll, turn rate and radius. Climb is dead even, slight edge in level acceleration by SpitXIV. The Mk.VIII won every fight. The SpitXIV is faster, but not as easy to fly.
Spit XVI vs La-5FN... Lavochkin was outclassed....
Spit XVI vs La-7... Better match up than La-5 was, but results generally same. Eventually the La-7 has to bug out or die.
Spit VIII vs Yak-9U... Yak was in trouble if E was equalized. Spit accelerates faster and outclimbs Yak (easily). Turning was also no contest. Yaks should avoid the Mk.VIII unless it has a good E advantage, and then know when to run.
Spit VIII vs La-7... Similar to Yak, but La-7's better acceleration helps. Can't beat Mk.VIII in vertical, can't out-turn it. Must stay fast and avoid blowing E. In short, the La-7 will be lucky to win starting Co-E, Co-alt.
Spit XVI vs Ki-84... Spit climbs better, out-turns the Ki-84 above 175 mph, and can still hang with it below that, although the Ki-84 turns tighter with flaps out, the Spit can use its better climb and acceleration to keep it competitive. Three duels, Ki-84 lost all three, but it wasn't easy. If the Spit was flown flaps out and stall fighting, the Ki-84 would have advantage. Avoid that trap and the Spit's better performance will prevail.
The Spit Mk.Vb and Seafire Mk.IIc are once again dogs... Just as agile, but not as good in vertical and considerably slower.
Two bugs noticed:
SpitXVI sheds wings under moderate loads, not as rugged as the Mk.VIII in that regard.
109G-14, you can break off the tail if you bounce the tail wheel too hard. Other 109s do not do this.
The Spit Mk.IX just became a hanger queen....
Finally, unperk the SpitXIV and put that perk on the Spit XVI, which will surely be over-used (and it's a monster to boot).
My regards,
Widewing