From: "Dan" <danstrider@...>
Date: Thursday, October 17, 2002 6:10 PM
Subject: Verdict on the Ex-Bug
Date: Thursday, October 17, 2002 6:10 PM
Subject: Verdict on the Ex-Bug
Awesome!
Background: I added 5 inches total to the wingspan (two extra #3
ribs) and kept the old dihedral angle. I created a Taboo like tail
setup and used heavier wire to eliminate all but 1/32" of slop. My
vertical and horizontal are approximately 50% control surface and
50% stabilizer. A 1/8" boom at 13.5 inches long drives the CG aft,
necessitating two nickels of nose weight.
After working out the launch preset (right rudder and down
elevator), I started using full discus launches using my wing peg.
Immediately, I noticed launches are equivilently high to college
baseball field light poles (80 ft?). Working on the preset a
little, a few launches were higher.
Granted, it was 5:30pm and the sun was almost set, I caught a
thermal without meaning to, stuck with it, and pulled off a two
minute flight. A few other flights were over 1:30. My dead air
times are around 45 seconds, around 1:00 with a good launch.
Control is good. The rudder doesn't bank the plane like my old Bug
(also a whopping 6" dihedral), but it is sufficient. Rudder
authority is not a problem with low winds, however. A few small
wind gusts did give my rudder trouble, but a touch of down and
rudder banked the plane without a problem. Elevator is more than
plenty. Perhaps too much elevator even - I did four consecutive
loops off of a shallow dive.
I was expiromenting with thermal circling when my radio battery
died. I had been programming in the mixes for so long while
building that my battery ran down.
My verdict is an emphatic "Try the extended wing!" The ex-Bug may
not be mosquito class legal, but launches with $400 composite DHLG
height with a much nicer price tag.
I will post pictures this evening when I have access to a camera.
Dan
PS I have a feeling that a launch preset should be right rudder and
up elevator. Is my CG too far aft? With no preset, the plane
climbs and rolls to the left. Thanks for the feedback.