Need to get my prop made up, was wondering if you guys could take a look at a picture that I have drawn (in my archive called Prop) and tell me what you think. [I'll be making use of my old crossflow type 9 gearbox mounting point to mount the centre bearing prop support].

Thanks,
Oli

You want no more than 14deg inclusive angle on any UJ, and a small amount of movement is a good thing to avoid bearings taking a set.

Hope this helps....

I've been told that there should be no more than 4 degrees? 14 seems like too much?!

Has anyone got any pics of the prop installed for an R1 engined car (preferably locost). I've seen a few pics of blade powered setups, but the R1 output is higher than the blade.

+/-7 degrees. Ring Bailey Morris or Dunning & Fairbank to confirm......

got my prop for R1 made by bailey morris, don't know if thats any help, but i would give them a ring.

Here's roughly where mine will be looking from the top, although I havent made the engine mounts yet so I will juggle it around a little to get it straighter.


R1 Prop angle

Chris

Chris,

Cheers for that - a few questions though:

Would you recomend to have the centre bearing support on the front half of the prop (as you have in your picture), or on the rear section? I'm getting mixed/confused views on this - in my picture I drew it with the support on the rear section.

How much elevation is there between your diff output and your engine sprocket output?

Do you have a sliding joint? If so should it be on the front or rear section?

Many Thanks,
Oli

My centre bearing is in the rear half of the shaft, with a sliding joint just in front of the diff. This is on a live-axle Striker and appears to work fine. But then the car has only been back on the road for a few days....

My centre bearing is mounted 90mm vertically (to the base) from the old Ford gearbox mount.... Unfortunately I don't have any pics though...

Coose - what sort of angles are the various parts of your prop running at?

Oli

Probably as sharp as Chris's UJ nearest the motor, although at full suspension compression the centre UJ may become as tight as his centre one. I was within the 14 degree inclusive angle on all UJs though at my last calculation!
I can't remember the other figures off hand I'm afraid.....

I might play with it a bit more and improve things over this, although where it is now is better than it was in the blade so Im pretty sure it will be OK.
If I get time I might move the centre bearing towards the driver a little, or even mount it vertically to get it as close to that side of the chassis as possible, like this

I
O
I

rather than like this -O- if you see what I mean!

Chris - that's exactly what Mark Jackson has done in his Lotus 7 S2 'Blade. It works fine!

I was going to suggest that to you to be honest......

I've done mine vertically on a 3x50mm plate welded to the top and bottom drivers side tunnel rails. It takes less space that way on.