05-02-2011, 10:35 PM
Thanks for the tip Paul. Yeh, "Aussie Aeroworks" charge $12 a tube, and "Monaro Models and Hobbies" $13.95 which is rich. "Depron Foam UK" sell it for £2.20 which at the current exchange-rate makes it much cheaper, even with shipping - however, I'm going to give the Creativ stuff you're plugging a go next time instead.
Por seems alright, but it sets with a flexible/rubbery finish which makes sanding it difficult. I've used Por, foam-safe CA and epoxy in various places on this build and if I could afford to do everything with foam-safe CA then I probably would - it's light, dries more rapidly than the others even without kicker and is invisible. The only thing it doesn't do is fill in gaps, the surfaces have to be a perfect fit.
All interesting stuff though ...
Some more progress made, in spite of the heat. The next couple of photographs show the pairs of 3mm sheets glued together sandwiching the hinges to make the fin and rudder. The tailplane and elevator were completed the same way.
Fin and rudder, and tailplane and elevator. The tailplane has a strip of fibre tape across the underside to prevent it flexing.
The wing is pretty much complete, just needs painting, then servos and linkages installed. A couple of strips of fibre tape across the underside of the complete span for good measure.
The fuselage is under way - the monobloc is in place between the fuselage sides, and the motor mount has been installed. Tunnels have been drilled through the monobloc for wiring ... but that's about it. Some fuselage bulkheads need to come next, then the aft end of the fuselage joined. After that ... more fiddly bits.
Por seems alright, but it sets with a flexible/rubbery finish which makes sanding it difficult. I've used Por, foam-safe CA and epoxy in various places on this build and if I could afford to do everything with foam-safe CA then I probably would - it's light, dries more rapidly than the others even without kicker and is invisible. The only thing it doesn't do is fill in gaps, the surfaces have to be a perfect fit.
All interesting stuff though ...
Some more progress made, in spite of the heat. The next couple of photographs show the pairs of 3mm sheets glued together sandwiching the hinges to make the fin and rudder. The tailplane and elevator were completed the same way.
Fin and rudder, and tailplane and elevator. The tailplane has a strip of fibre tape across the underside to prevent it flexing.
The wing is pretty much complete, just needs painting, then servos and linkages installed. A couple of strips of fibre tape across the underside of the complete span for good measure.
The fuselage is under way - the monobloc is in place between the fuselage sides, and the motor mount has been installed. Tunnels have been drilled through the monobloc for wiring ... but that's about it. Some fuselage bulkheads need to come next, then the aft end of the fuselage joined. After that ... more fiddly bits.
Steve Murray