wow that looks posher than the one i used we had to hang weights off the arm on side of it and ajust the vane angle to get it to ballance then had to work it all out on paper sadly that was the whole idea of the exersise more about number crunching. fun fun fun
god knows where thay dug it up from it was very old
work sent me to our rail engine rebilders as a triaining exesise a few years back i got a look around all thair dynos as i showed some interst, thay had some real monsters there and had some cat 1200bhp lifeboat engines running full chat on one and some massive mtu units on the other was a real eye opener made everything else look tiny
i only got to play on the dyno with engine we used and i help rebuild also dyno'ed a hyd gearbox for efficency that was basicly 2 torque meaters either side