The basis of the CH46 chassis is 10mm square box section aluminium. This provides the desired backbone strength of the chassis and is light in weight.

All the neccesssary mounting holes are predirlled so construction is straight forward.

Frames for front and rear mainshafts plus a centre frame for electronics and battery mounting are made in glassfibre.

They are strong and exellent in quality.

Construction starts with the assembly of these complete with bearing blocks and canopy mounting points.

Care is need to ensure correct orientation with the bearings facing the correct way

After positioning the undercarriage support and gluing in place making sure it is mounted centrally the motor can be fitted.

The rear rotor is driven by a carbon fibre driveshaft. The motor end o fhte shaft has a simply universal joint which should not be glued in place until all adjustment is complete, I used JBWeld for this as it allows more control than the suggest CA. Allow some play between the motor pinion and the UJ.

The motor is brushless and has output shafts front and rear.

To the front is fitted a conical gear whereas the rear has a simple universal joint.

Once the correct length for the rear driveshaft is determined the collar shown is slid up against the intermediate bearing and locked in place.

Take care with adjustment of the three bearings guiding the rear driveshaft make sure the shaft is absolutely straight, loosen off all three bearing blocks and rotate the shaft to help determine this.

The landing gear can now be fitted as it makes the model easier to work on.

I used CA to glue the struts in place on the carbon boom, the wheels should rotate freely