Early radius arms.

[36inter]

Early radius arms I believe were welded fabrications, different to the later castings, has anyone any idea when they changed from fabrications to castings, thanks.

Pete

[InimiaD]

The trumpets were changed to cast-alloy during may 1961.
Not sure if the radius arms were changed at the same time.

For racing purposes the fabricated steel ones are lighter.

[36inter]

Thanks for that, I will go with May 61 as the change over, unless anyone else knows better.

Pete