@ Swiss - Typical flippant response from a blue-only flyer who clearly hasn't flown anything outside of a 109/190.
IMHO the 4.09 spits were more difficult to takeoff and land, Torque at these points of the flight regime seem reduced in 4.10.
The induced roll in the 4.10 Spits is happening at anywhere above ~200mph and is NOT torque. Torque roll would always be to the left, this is to the right.
Rather, I suspect it is the effect of airframe bias, whereby a little trim is inherently built into the structure of the the airframe, whether it be slightly offset vertical stabilisers, or as in the Macchi series, the asymmetric wing profile. This limits the a/c to being inherently trimmed at only a narrow speed/power setting, with the pilot having to work the a/c trim more above and below these settings.
Whether the TD spits are correct or not I cannot say. I have no proof, documented or otherwise and have not seen their source to comment on the veracity of it.
I will say that in my opinion, the original 4.09s felt more logical as knowing what happens aerodynamically the behaviour could be accounted for. Now I'm not sure why they behave this way - it seems like torque effects are reduced in all flight regimes - incuding climb out and power changes but that has been arrived at by lowering the effective trim speed of the a/c. During all other manouevres above 200mph approx, the Mk Ixs particularly want to drop the right wing.
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