## Simple driveline torque measurement method ? Horsepower also.

## Simple driveline torque measurement method ? Horsepower also.

(OP)

If the torque output of the differential output shafts is always the same - then if one shaft is locked in a simple scale/lever device (to measure the shafts torque at zero rpm) and the other shaft is connected to a load and allowed to rotate - then the torques will be the same.

Also -by measuring the rpm of the rotating shaft the horsepower can be calculated.

Anybody see any problems with this?

This must have been done a hundred years ago!

Also -by measuring the rpm of the rotating shaft the horsepower can be calculated.

Anybody see any problems with this?

This must have been done a hundred years ago!

## RE: Simple driveline torque measurement method ? Horsepower also.

## RE: Simple driveline torque measurement method ? Horsepower also.

Usually if you lock up one shaft, the speed of the other shaft will increase.

Ron Volmershausen

Brunkerville Engineering

Newcastle Australia

http://www.aussieweb.com.au/email.aspx?id=1194181

## RE: Simple driveline torque measurement method ? Horsepower also.

Worse, the typical bevel differential gears don't have real bearings or effective cooling, so they'll overheat and fail pretty quickly when used in the way described.

The usual lowbuck (sort of) tactic is to instrument the engine mounts to estimate torque developed.

Mike Halloran

Pembroke Pines, FL, USA

## RE: Simple driveline torque measurement method ? Horsepower also.

## RE: Simple driveline torque measurement method ? Horsepower also.

## RE: Simple driveline torque measurement method ? Horsepower also.

The oil temp will change rapidly during the test which will alos affect the results.

Cheers

Greg Locock

New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?

## RE: Simple driveline torque measurement method ? Horsepower also.