Algodoo

Question: How do you measure torque?

The torque of an engine at a particular RPM can be measured by two ways:
-Induce friction on the shaft to maintain stable RPM, measure the torque applied on the brake system at this particular time (spring dynamometer giving a force multiplied by the distance between axis and the measurement point: you have your torque) , repeat this at each station (let say at each 250 rpm).
-Or the acceleration method (The method I use): accelerate a massive cylinder. The Torque is directly proportional to acceleration. (Force=mass*Acc) This formula can't be applied directly on rotating object because the mass become a gyration momentum (ex: For the same mass, acceleration can be less if the mass is far from the axis). So you have to use a fomula like this (Torque= Acc*J*M) I haven't use any particular formula to give me a special torque measure like N*M or LB/Pi because I get confuse with the 2 Dimensions world of algodoo, and J*M is constant.
There is a couple of extra variables like:
-anvel2 to store old angvel and then calculate angacc1.
-angacc1
-angacc2 and 3 store old acc to make an average to give a more stable graphic (The engine produce a really unstable output)

The power tracer broke off and drew a flower.

This is very helpful, thanks a bunch!