Truck parts Dynamometer.

[Kalle Pihlajasaari]

Hi,

What diameter shaft would one look at for coupling the rolls together and
to the Retarder ?

> -> The tires slip on the rolls at higher powers, and there is a lot of
> -> energy lost by the tires heating up as they deflect at the roll
> 
>  Yes.  They're only useful as full-range dynos for less powerful cars,
> but they're quite handy for doing low speed and part throttle work on
> any car.

The rolls at the break testing facility at the roadworthy testing site
inmy home town have regular link chain wrapped around the rolls in a 
close spiral.  This makes the surface of uneven diameter and would
give a different result depending on the weight on the wheels I feel.

Does one need to check revs from the wheel or is the roller good
enough for most tests (comparative)

Cheers
-- 
Kalle Pihlajasaari     kalle at data.co.za
Interface Products     Box 15775, Doornfontein, 2028, South Africa
+27 (11) 402-7750      Fax: +27 (11) 402-7751