HardOCP News
[H] News
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- Dec 31, 1969
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If you think your Monday sucks, watch this video and you'll instantly feel better about how your day is going. If you are really pressed for time, fast forward to the 1:45 minute mark.
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As post #6 clearly shows, the vertical stabilizer was surface mounted on the skin of the main fuselage or very close to it. That is poor construction technique on a model this size. As you get bigger, the structure must also borrow from the full size more and more or the airframe cannot stand the stress. The person who built it seemed to think what works on small models works on big ones. True for aerodynamics, not true for stress.
Tail disintegrates, then when the nose pitches up, the wings disintegrate. It was just a matter of time before this thing broke apart, given the combination of power, airspeed and weak construction.
- Vertical stabilizer separates.
- Plane begins to yaw left = nose up.
- At about 45° slip angle, it starts to roll left, continuing pitching nose up.
- Next couple of pieces separate at about 60° AoA, wings almost level, pitch up continues.
- The whole thing blows up at about 90° AoA.
Certified or not, that thing had some serious structural issues.
its very big...
sad.
I experienced structural integrity failure yesterday during a maiden flight of a blu-baby 33 as well. AUW is 8 oz including lipo. Very nice light foamy model that just floats. The single sheet of foam that comprised the wing snapped when I was about 40 feet in the air doing a simple loop.
Thankfully, a 1 minute repair job fixed it and the motor was ok.
Lesson learned again though, even if you think you can do high-G maneuvers, doesn't mean you should. That's what 3D planes are for.
RCG thread
I like watching those indoor foamies. Here's one, he doesn't get going good until 1:30
..
I like watching the guy
Holy crap! how does he do the maneuver at 1:23-1:25 in the first video?! (hammer-like motion)
And how does he reverse (backup) the plane at 1:36-1:42?
I've never heard or seen of planes backing up like that. of all the ESC's I've used, there's never an option to make the motor spin in reverse. You'd have to have like an interconnect relay between 2 of the motor lead connectors and flip a switch for them to alternate connections to the ESC.
Holy crap! how does he do the maneuver at 1:23-1:25 in the first video?! (hammer-like motion)
And how does he reverse (backup) the plane at 1:36-1:42?
I've never heard or seen of planes backing up like that. of all the ESC's I've used, there's never an option to make the motor spin in reverse. You'd have to have like an interconnect relay between 2 of the motor lead connectors and flip a switch for them to alternate connections to the ESC.
I was wondering the same thing since it's so big.Damn, what was the plane made out of, Balsa-wood?
ah... I'd heard of the variable pitch propellers before, but I thought they were used for quadcopters
Damn, what was the plane made out of, Balsa-wood?