.004" is the maximum permissible run-out on the 9" front disks of a Spitfire.
It is probably the same for a GT6 too.
Found it in the back of a Clymer Spitfire Owners Handbook. It covers Mark 1,
2, & 3 only.
It literally has everything, even some Herald 1200, 12/50 tolerances &
dimensions.
For instance....
Windshield Wiper Motor:
Resistance of field winding @ 20°C. (68°F) ... 8.0 - 9.5 ohms
Resistance of armature winding @ 20°C. (68°F) ... 0.29 - 0.352 ohms (Measured
between adjacent commutation segments)
If you were wondering.
Douglas Aiken
Complicated by design.®
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