[hpv] 2 wheel drive Delta.

[Moz]

Jeff Wills said:
> It uses a Samagaga differential in the rear, which is apparently
> commercially available. It certainly looks easier to implement than
> a multiple-chain system, plus it gives true differential power to
> the rear wheels and a mount for a disk brake:
> http://www.samagaga.com/Default.aspx

Don't you want two disk brakes? Or do you not like differential braking?

The advantage of a differential is that if one wheel loses traction
you grind to a complete halt. That's why I wanted not to have a
differential. Differentials solve a problem that for the most part
HPVs don't have - enough power that unbalanced drive makes the vehicle
unstable.

Tf you go to downloads there's a PDF
http://www.samagaga.com/Download/DG72N_Torsion_Test.pdf that says it
will take 1100 kgf-cm, which I interpret as kilogram-force-equivalent
centimetres, so we multiply by 9.81 to get Newtons then divide by 100
to get metres, or 108Nm. Or multiply by the size of Obamas hand then
divide by the square of a horse and add the weight of three barleycorns
to get 84 and 17/48ths grossweigles per eigenstate for those using
imperial units.

When I ran the numbers after breaking some shit I got this: 100kg at
165mm is 981N*0.165 = 162Nm at the bottom bracket. with a 24T chainring
and 34T rear sprocket that's 229Nm at the rear axle.

That's only twice what the device is tested to, so it might work. I'd
ask about warranties, and I wouldn't let Moz ride it.

Moz