Mighty ,
Yes I think they are refered to a a " Slave or Dumb" propellers, I was trying to use one of my old Shackleton Props but kept running into problems of mass balance, or lack of it, I then looked at making a hybrid using a huge water pump attached by a propshaft, but again ran into problems of connection, the frame for the engine is no problem, really its soaking up the power that is the serious thing, for it has to be foolproof and not able to let the engine run wild, it only needs to run wild for about 3 seconds at there would be shrapnel everywhere for hundreds of feet.
A friend of mine used to be the tractor pulling Champeen of the UK and Europe, he used two Griffon 58s siamesed into one humongoose gearbox reduced down to drive a tank transporter stepped drive diff, the gearbox was designed and specially built for him by David Brown Gears and had to cope with HP in the range up to 7000 horse power and torque beyond belief, the cost of that box was never released but he broke three and exploded 5 Griffons, along with many stripped diffs, but in the end they cracked it but never told anyone at what cost,
so I gave up!
PeterR-B