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QHOR Flight problem

Old 06-26-2003, 12:18 AM
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Default QHOR Flight problem

I built a QHOR .40 with an OS .40 LA. The only problem (although pretty serious) is that when I get into a steep-highspeed, high angle of attack dive, it won't pull out and makes like a lawn dart. I first had a problem with the cheezy linkage I used coming apart, but I replaced that and it happened again. I know they are easy to fix, but I'm getting tired of doing it, I also added an inch to all of the control surfaces thinking this might help--but no.
Old 06-26-2003, 12:26 AM
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Default QHOR Flight problem

Dives should only be done at idle or very low throttle. Mine always pop right up when I need it to. Sounds like maybe either your servo doesn't have enough torque to pull the surface at that high speed or the surface is flexing from too high a speed. Try taking it easier, besides it's more fun to keep the nose up anyway.

Jason
Old 06-26-2003, 12:30 AM
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Default Check horns

I noticed when I stress my home made horns the tend to move a little or alot depending. If you use single screw horns like on STTB website make sure they dont move.

Just a thought?

Dan
Old 06-26-2003, 10:47 AM
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Default QHOR Flight problem

Stiffen the control surface. And/or better servo.
Old 06-26-2003, 11:16 AM
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Default QHOR Flight problem

Kraut built one with duel HS-81mg servos for the ailerons. He had to change them to standard servos, because we could see in flight that they didn't have the poop to move the ailerons at higher speeds. I wouldn't have believed it if I haden't seen it for myself.
Old 06-27-2003, 12:23 AM
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Default QHOR Flight problem

Thanks for the input, I was thinking about stiffening the control surfaces with some clothes hanger wire thru a couple of the flutes and a deeper control horn to sandwich them. I didn't think about the servo not doing its job, I will have to try one with a little more torque or double two up.
Old 06-27-2003, 04:03 AM
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Default QHOR Flight problem

You know what makes a really stiff control surface that will rival balsa? Poly glued, woodepeckered, doubled over 4 mil.

Makes em stiff as all heck.
Old 06-27-2003, 06:12 PM
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Default QHOR Flight problem

Originally posted by Deadeye
You know what makes a really stiff control surface that will rival balsa? Poly glued, woodepeckered, doubled over 4 mil.

Makes em stiff as all heck.
You mean like gutter pipe poly?
BTW do you guys have any decent SPAD events down Montana way?
Old 06-27-2003, 09:12 PM
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Default QHOR Flight problem

Originally posted by Fearless
You mean like gutter pipe poly?
BTW do you guys have any decent SPAD events down Montana way?
I mean polyurethane glue - like Elmer's ProBond.

And no, no events yet, except for when I'm at the field. It's starting to catch on, though.

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