AirArms CD and HW Rekord Trigger Units Interchangeability

[Artfull-Bodger]

Ah, unfortunately it doesn't work like that.

You would expect the smaller surface area of the smaller pin to give a lower frictional loss but that's not the case.

The standard formula for working out the coefficient of friction does not include surface area :-

image.png

U = the coefficient of friction between the two materials.

image.png

Oh yes, I recall trying to comprehend why wider tyres gave more grip on our race car when this one was trotted out by a college student at Prescott, according to the theory we should see the same level of adhesion and less drag by using narrower tyres, therefore faster, never worked like that though.

It could simply be less surface imperfections in the bore or on the pin in the smaller bore leads to less fouling, whatever the cause I have found smaller pins to be beneficial.

[T 20]

Oh yes, I recall trying to comprehend why wider tyres gave more grip on our race car when this one was trotted out by a college student at Prescott, according to the theory we should see the same level of adhesion and less drag by using narrower tyres, therefore faster, never worked like that though.

It could simply be less surface imperfections in the bore or on the pin in the smaller bore leads to less fouling, whatever the cause I have found smaller pins to be beneficial.

The other good question is why don't formula one cars use pushbike brakes to save weight.

[Artfull-Bodger]

The other good question is why don't formula one cars use pushbike brakes to save weight.

Indeed!