CampRobber
Active member
I used iforce2d's plans with the following mods:
I've glued it back together for now but it'll weigh even more. I need to put some thought into lightweight fiberglass.
- Wings stretched from 24" to 32" span
- Wings given a lot of washout
- Fins hotwired insulation foam instead of DTFB
- No spar; just the leading/trailing edge fiberglass reinforcement.
- Wings/battery cover attached with nylon screws to 1/4" ply mounting points.
- More square fuselage cross section.
- The CG was too far forward.
- During throw tests I added 24g of ballast to the tail; it still required about 3/8" of reflex on the ailerons.
- Supposedly this has a special plank airfoil with built-in reflex so it should be stable with... none?
- However I'm not really sure if the CG is exactly right for that.
- Also the hot wire cutting accuracy wasn't great.
- It had plenty of power and was more docile than I expected.
- But I should have practiced in the sim more. Pilot error caused some hard landings.
- The fins do a good job protecting the prop... but broke. In hindsight it was pretty obvious that they'd break right where they both did.
- The nose broke off. It had a rectangle of fiberglass on the bottom, which took the landing impacts well, but it broke cleanly behind that.
- The wingtip broke off in one of the two places I'd expect it to.
- The fiberglass remains in good condition.
- I was flying in a field they cut/bale hay and the grass was long and forgiving.
I've glued it back together for now but it'll weigh even more. I need to put some thought into lightweight fiberglass.