Pusher with polyhedral

I have never tried a 3 channel rudder elevator throttle plane so thought I'd give it a go using the orange slim wing and pusher fuselage.

RET planes need some wing dihedral to enable turns due to the lack of ailerons.

I fixed the ailerons in place and removed the servos. This simplifies the plane greatly, the wing is just a wing, no servos or wires, apart from rudder and elevator.

The CF spar was removed and a bent 200mm x 10mm diam ali tube inserted to set the dihedral. The wing extensions were hot glued in place at the desired polyhedral angle. The wing seems to be strong enough without a CF spar.

I increased the rudder area, but after the maiden reduced the throws for smoother control.

The 1500mm x 200mm wing and flying weight of 630g gives a wing loading of about 21 g/sq dm (7oz/sq ft) which is great for gliding and slow flying.

This plane is a delight to fly, so slow and steady. If I had started with something like this the learning process would have been much quicker. I can trim it to fly hands off in big lazy circles and it takes care of itself.

Wingspan - 1.5m (59")

Chord - 200mm (8")

Elevator servo - TGY 900 9g

Rudder servo - TGY 500 5g (stronger servo might be safer)

Motor - Turnigy 2822/14 1450kV

Prop - 7 x 4.5"

Airframe weight - 520g

Flying weight - 630g with 1300mAh LiPo (gives 20 min slow flying)

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