Following on from the ‘Flying Brick’ lessons learned which is ready for the right conditions i.e. lots of lift… I had a rethink on my second prototype requiring it to be significantly lighter and have a motor fitted (hidden when soaring) to enable it to be flown at the field assuming it does fly.
The key differences to try and meet the lighter weight is; a carbon fibre boom and moving tail as the back end of the Flying Brick is the primary contributor to the overall weight as the balance weight had a ratio of 2.8:1.
To improve the build finish and help keep the weight the wing skins are made as two separate pieces using aluminium moulds then bonded together with spares glued in. The fuselage mould is mage from 2” aluminium tube; shaped then split on the vertical axis.
I have attached a couple of initial photographs; one of the moulds and the other of the part assembled components. I will be providing updates as I get a little further through the build.
We are now getting closer to painting, need to fit the wing servos and tips… The controls for the moving tail and rudder are complete ready to fit after spraying, but what colour(s) shall I use?
The final painting and assembly is complete with an ready to fly weight of 1.4kg a touch heavier than wanted and may push the motor to the limit when field flying, that’s assuming it flies… I used base coat metallic silver as it thin and should be lighter that standard gloss cellulose.
Assuming it flies at the field and is not destroyed, the next step will be to replace the prop spinner with a glass fibre nose for soaring.