Inspired from recent topics about A7/A10 TLS-Brakes
especially the picture of Rocket Racer (
http://www.a7a10.net/forum/index.php?topic=6043.msg41302#msg41302) and the excellent articles of Jeffery Diamond about drum brakes (
http://victorylibrary.com/brit/SLS-TLS-c.htm) (See Picture 1)
I wanted to improve known poor braking on my A7-Longstroke.
So I started my project TLS for the 7 Inch front, half width drum with steel brake plate (1949-55).
As all later BSA/Triumph TLS Brakes won’ t fit easily the specific fork of the Longstroke and also don’t have the right “optics” I decided to build it by my own in my little private shop.
Most of the needed parts I found in my shed and by Internet. The linkage is from the Triumph TLS Brake 37-3453/54. (The outer TLS Brake Arm Return Spring is still coming).
Some minor parts (e.g. additional sleeve for the second cam) I made on my little lathe. More critical was the changes to the cams by adding the“Quarter-moons” (made from the original fulcrum pin) for fitting the original brake shoes (see pictures).
Next steps are testing and the optical finishing of the parts.
Rudolf