Hi H5606,
Those 'in air' photos are cool...
Any chance the top fin could be somehow mounted to a tank hatch?
On my .049 engine test wand, I just used a cut down cardboard 'end of toilet paper' tube to the dia of the filled bladder.
Wad of paper towel end stop. Slide filled bladder in, tack in place 'loosely' with another paper wad. Worked great..
Even in severe 'flightGs' I could simulate. Did not crash test it.
Making me think about CPs idea of a fuelproof hole to retank and fill... being lighter and more practical....
MJD,
Your previous post said it all about bladders, just adding to it.
I'll see the Toucan go...
When I get you to test launch the Go-Fer ...
Cheers,
Dave'crosscheck'Fallowfield