Hi again,
The belt reduction is an off the shelf item, from Mick Reeves Models here in the UK, and it is geared to 1.75 to 1, with the prop turning at 4200. It seems to run OK, without overheating too much as the motor is just behind the cockpit, running an extention shaft (9 inch) which keeps the motor infront of the C G, and lessens the need for noseweight, although the batteries are right up in the nose. The shaft was designed by me, with lots of input from people who know more than I, but was made by a local, and excellent, engineer who knows his onions! The shaft runs in bearings, in an aluminium housing which bolts into the airframe, and there is also another bearing near the rear end of the shaft, which spins the dummy rotary at a much reduced RPM. The prop was made in the UK by EAT Props, although at first it was very heavy, too much material at the hub mainly, so I recarved (hacked!!) it and rebalanced it. The prop weighs about two thirds its original wieght. The model is due for its final LMA inspection at the weekend and, if it passes, test flights can begin. ROLL ON WEEKEND!!!!

Cheers, Ian.