This twin boom pusher is similar to the 1.3m Depron Spectre, however it has a straight 1.65m (65") x 190mm depron Armin wing and twin rudders.
Initially it was designed it as a 1.8m light-wind slope soarer but didn't perform as well as I wanted. The longer tail booms and larger wing span made it too flexy and delicate. I was also comparing the performance to a motorless Phoenix 2000, which is a sensational sloper.
Instead of using packing tape to cover the depron I used document laminating film, often referred to as New Stuff in the RC world. It is ironed on with a warm iron before bending the airfoil and fuselage, and works very well. It's tougher and easier to apply than packing tape. How to video below.
Additional strengthening ...
6x1mm CF strip glued along the front of the elevator
Heat bent UPVC brackets for the rudder to elevator joins.
Full length wing spar made from 2 Skyshark P4X spars joined with an internal 80mm solid CF joiner and epoxy.
I used twin rudder servos rather than one servo and a long vulnerable connecting pushrod between the rudders.
Wingspan - 1.65m (65")
Length - 100cmm (36")
Airframe weight - 840g
Flying weight (2200mAh LiPo) - 1040g
Motor - Turnigy 2836 1100kV (260W)
ESC 30A Plush
Prop - 10 x 6"
TGY 9018MG servos x 2 (ailerons)
HXT900 servos x 3 (elevator and rudders)
I can email the Sketchup file if required
Powered flight maiden
Fuselage build using New Stuff or laminating film.
Initial slope soaring tests
Bulk Depron - http://www.tradewarehouse.com.au/more/depron-foam/white.html
Skyshark P4X spars - http://www.kitesandfunthings.com/ProductInfo.aspx?productid=SSP4XCAM0
New Stuff iron-on film - EZload laminate - http://gbcaustralia.com.au/products/display_consumable.aspx?ConsumableTypeID=213
Blank ID cards - Ebay http://www.ebay.com.au/usr/y2store?_trksid=p3984.m1439.l2754
Newton Airlines blog (Plans) - http://newtonairlines.blogspot.com.au
Website - http://anewton.net
Pin point accuracy FPV landing