Bill Daniels wrote:

Keep trying it. I think you will find you have control over airspeed.
180 - 240 HP isn't nearly enough power to prevent a big 2-seat glider from
slowing the winch.

A big two seater may have a small effect on the straight six - we've
only had that winch a year or two. I did all my training on the V8 and I
know from both experience and instructor verbals that nothing in our
club fleet can slow it down enough to make a detectable difference.

An ASH-25 probably could, but although I've seen them winched I've not
been in the winch or the ASH at the time so can't and won't comment
further about that.

I think you're ignoring torque. The 240 hp Deutz is likely to produce
more torque than an automotive V8 of the same or higher power output.
Its a mining engine and designed for high torque at low rpm. Power =
torque * rpm, so for equal power the slower turning engine has
proportionately higher torque. It is, after all, the torque not the
power of the winch that determines whether a glider can affect its speed.

I've looked for engine specs, but although I know it produces peak power
at 2300 rpm, I can't find figures for max torque or the rpm for max
torque. At a guess max torque will be produced at somewhat below 2000 rpm.


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |