On 21 Mar, 13:30, Jim Beckman wrote:

*Are there any British
gliders left that are old enough to have used Whitworth hardware?

The UK car industry switched over to UNF/UNC in the early sixties, but
I wouldn'r be suprised to find Whitworth/BSF in anything Slingsby made
until the late 60's. They were masters of improvisation ... for many
years Slingsby glider main wheels were surplus Spitfire tailwheels.

I have to keep a full set of imperial tools for my Herald and a full
set of metric ones for my DS. I still have a Whitworth set from when I
had a 1959 Morris Minor but it doesn;t get much use. The Micra just
never needs mending, so nut sizes are irrelevant ...

Ian