Posted by Mac50L |
Apr 06, 2013 @ 04:57 AM | 1,745 Views
I delivered a new Dart (#3) to its owner last night and he did a quick test flight. I advised less throttle and launched it. Within 10 seconds (his words) he was hooked on it. This is someone who has been flying for over a year, Bixler, SBach 342, etc.
We had indoor flying later that evening so a quick outdoor flight by both of us to "calibrate" fingers and then inside. I'd built the first Dart just for the indoor flying nights and was flying my #2 (#2, that's another story). The indoor is just a basketball court size and I've found a UM T-28 a bit of a handful in there (poor pilot?). The Dart, off the floor with a kick on the throttle vertical for ~10 feet and then lazy circuits. Square circuits - this thing turns on a sixpence (OK a dime).
So my #2. Made a mistake measuring the wings and has an extra ~3" span and a little less chord. Flight difference? Can't see any, maybe glides further.
Modifications - the body is 15 mm longer, sticking out ahead of the front edge of the wing. This allows the battery to be fitted further back near the CoG. The body is wide enough to fit a 460 - 500 mAh, 3S battery in. The vertical walls of the fuselage bend from the front of the tailplane back and meet at a point at the back of the tailplane where the elevator meets it. The wings have a Western Red Cedar internal spar which saves fitting a kebab skewer (or CF spar) across the wing. A plywood firewall with ~60 mm long ply panels inside from it, glued to the internal...Continue Reading
A closeup of the 3M hook with the wire and rubber band retainer. The "70" is the mm distance from the wing's leading edge. There is also a "60" (out of picture). These are for CoG checking.
A link-stopper replacing a clevis. Note the wire on the horn for security. Also visible under the pushrod is another copper wire through the wing. This is one of the hinge retainers. The hinges aren't actually glued into the wing, just retained with copper wire.
Posted by Mac50L |
Jun 11, 2012 @ 03:52 AM | 2,755 Views
The airscoop and undercarriage fitted to a Bixler and a more reliable wing retainer using a wire with a rubber band to stop it unclipping. The wire runs across from hook to hook and has a reverse bend at its ends for the rubber band to hook over.