American engines prop rotates clockwise (viewed from the pilot's seat) while British engines prop rotates counter-clockwise.
investdude wrote:First of all, I did some research and found that, as usual, Hagar is right! It was apparently universal originally that all props everywhere rotated clockwise. But when the British were developing very high powered engines for single engine naval fighters during WW2 it was found that the clockwise rotation, in the event of a bolter on a carrier landing, caused the ensuing torque to cause the aircraft to veer to the right, towards the island. So it was decided to adopt anti-clockwise rotation so that the torque would operate in the opposite direction, away from the island.
Anyway, I tried Hagar's suggestion with a Spitfire and a Hurricane and added "rotation= -1" under the [propeller] header in the Aircraft.cfg file as an experiment and it worked, changing the rotation from clockwise to anti-clockwise.
However, when I tried that with the Garwood Lancaster I have, which has anti-clockwise rotating Merlin engines, which should of course rotate clockwise, whether I used rotation= 1 or rotation= -1, the aircraft, although engines were off, began to spin around and blew up. Not sure if it being a multi-engine aircraft had anything to do with that.
So I'm happy that my Merlin engined fighters are rotating in the correct direction but don't know what to do about the Lancaster. By the way, I viewed some WW2 films of Spitfires and Lancasters starting up and verified that the rotation was definitely clockwise.
papituwall wrote:Important: Take into account that the RR Griffon had "left hand tractor drive" instead of the Merlin right hand tractor drive. This caused some confusion to Spitfire pilots upgrading to Griffon Spit Marks.
You should chech your Spitfires as said before, because they can be correct.
I think a developer of an addond knows this difference.
Hagar wrote:The props on Dave Garwood's Lancaster that investdude mentioned do in fact rotate the wrong way.
While the CFG tweak I posted earlier will fix this it does not correct the P-factor effect for some reason. I'm still trying to figure this out.
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