Just out of general interest. I used a rifle trigger pull gauge to measure the Plus Six wiper arms spring force at the wiper blade.
The measurement right at the end of the wiper arm at the wiper blade was consistent on all three arms at 1.5 lb ( 0.6803 Kg ). This figure was recorded just as the wiper blade started to lift from the windscreen.

Last edited by Davetherave; 29/01/24 02:12 PM.

Dave
Plus Six "Squeak"
Roadster departed.
1936 BSA Empire Star Q8. 1935 BSA W7-35. 1938 BSA M20