gregv wrote:
Ollie wrote:
The reason why the wheels on the Spit and Bf 109 retracted outwards was because they were attached to the fuselage, which made the track very narrow. It saved on weight.
if memory serves me correctly, the Spitfire main gear attached to the wings, not directly to the fuselage; they did however on the 109. Is there any particular reason that the Spitfire had such an easier time with landing than the '109? They both seem to have a very narrow track.
The bottom line is that the further towards the aircraft centerline the gear are, the less bending moment is exerted on the wing so the aircraft is lighter. Mount the gear on the fuselage and it is lighter yet because the wing doesn't need to carry any of the gear loads.
I suspect the narrow track was much more acceptable on the grass aerodromes seen in Europe before the war, and early in the war. You couldn't get much grip on the grass so the tires could slide sideways more easily slowing your entry into a groundloop. What little grass I have flown on also seems to add a stabilizing affect (from the drag on the wheels?).
Since the US entered the war a little later, I suspect the doctrine of gear design had evolved a little more towards a wider track more suitable for hard surfaced runways.