We have a 1970's vintage Bill Phillbrook Tandem fitted with Mafac Cantilever brakes. The front brake is very good - albeit with a lot of squeal type noises. The rear brake is about as useful as a chocolate fireguard - it delivers a discernible but totally inadequate braking performance.
We have no rear drum brake.
I have tried, new brake blocks (Kool stop salmon), lubricated the cross wire to ensure the hanger doesn't stick etc.
I think that i have the angles ok (see pics) of the brake levers - i.e. pulling from horizontal.
On the basis that this is in my opinion dangerous - i ordered a set of Jones cantilever brakes (en-route from the US as we speak), but in the meantime does anyone have any wisdom on improving rear brake performance as i am nervous about using the tandem in anything other than 100% dry conditions.
Rims are pretty standard Mavic 36 hole. Braking surface area looks ok - not covered in grease, oil etc.IMG_0009.jpgIMG_0008.jpgIMG_0010.jpgIMG_0011.jpg