The delta wing is a very interesting platform.
It goes fast but can slow right down. At hight angle of atack the wortex that is usually present at the wingtip, is different in high sweep angle wings.
The vortex starts at the root and the high AoA makes the vortex from the bottom of the root leading edge actually cirl over the top of the whole leading edge of the wong creating a much better lift.
Go and google "delta vortex shedding lift", it is quite interesting.
Ever see a vid of the concorde landing where the whole front part of the wing is unde a vapour cloud?
This is what happens.
Well here is is, all glossed up and ready for owner to install the engine, RC and gear to be test flown hopefully within the next month.
The weight is a little more than I had hoped, but I recon it is the loads of filler and primer that went on to smooth out the fuselage molding aswell as the fill if the weave on the wing's glass.
I now prime inside the molds and I think I have eliminated about 80% of the filling and sanding, on the wing I will fill the weave with eopxy and micro ballons on # 2 to see if I can save on some primer.
The colours coats were not as heavy as I expected, I think about 70% weight of the paint is primer.
The weight as is now sits at 3700gr. Sounds heavy but the engine/fan weighs 1300 gr and gear/RC no more than about 800 gr with 500 gr of fuel, so I estimate a MAUW of about 6,2 kg.
The fan can make up to 6 kg of thrust so I think it will fly OK.
I balanced it and sofar as is it balances very close to the CG so maybe no dead ballast will be needed.We will play with installing the gear doors after testflights, for now keep it simple.
I will see where I can save weight on # 2 that I am busy with now. I will not do the 2 layup of carbon on the top centre sefction, 1 will be more than enough.
Plane represents # 842 of 3 Sqn SAAF 1970/80's
Still waiting for the canopy to be made.