Wasp slipper question

[rsj]

I've got a Wasp slipper which I think is complete. There's the main part which fits on layshaft and has a threaded square drive, the spring cup with square hole which fits over it, 5 spring cone washers then the domed nut. Both main part and cup are alloy. Question is can I run a tufnol spur gear in the slipper as it is or do I need to fit some kind of pads?
Thanks j

[terry.sc]

Sounds like you have the complete slipper there, they didn't use any slipper pads the spur gear was just clamped in the middle. Back then the slipper was more of a transmission protector rather than something designed to slip regularly, to absorb the shock loads when landing from jumps for example, so running on the spur was fine. Usually a nylon spur gear was used in these, but a tufnol spur should still have enough friction to give enough drive, but unlike nylon spurs you aren't going to melt it if the slipper is a little too loose.

[rsj]

Thanks for the reply Terry.
The way you explained it makes perfect sense considering the parts that are used. I was thinking these things were supposed to do the same job as a modern setup. Been looking at it again and I had also missed the lack of a bearing to centre the spur on the layshaft like a proper slipper has. Will use it as it was intended!
Cheers j

[masons01]

Hi there

Terry is completely correct with his explanation, in addition to this explanation is that after some testing with loosening the domed nut against the coned washers to get more slip (like todays slippers) it would undo itself!!!!!!!!!!!!!! therefore we changed the design a little to include a tapped hole in the domed nut to allow us to put a grub screw down it to lock it against the layshaft allowing it to slip alot more without the nut coming loose. Problem sorted.
Can't beat an M3 nyloc nut though like nowadys!!

Mark

[DerbyDan]

I assume this is what you have rsj?

Looks like mine has been modified with the grub screw as described... also can anyone tell me where the rubber 'O' ring goes or if it needed (I wonder if it was added to try to stop the loosening)

[G stote]

I don't think thay had the o ring washer?