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james.vanlaak(at)gmail.co
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 Posted: Fri Aug 10, 2018 5:07 pm Post subject: Spades |
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I am a big fan of aerodynamic balances for well balanced control forces, and I would love to see a nice set of spades for the Kolbs. But remember that right now only a small fraction of your ailerons are moving and contributing to the roll rate. If you put the aerodynamic balance in the middle there will be more movement in the outer part of the aileron and that would increase your rate. I like sprightly controls so sounds good at first blush.
But remember there are 40 years of Kolbs flying with that springy aileron spar. you would be a bit more of a test pilot than when you build from a well established kit. I like that but not everybody does. Point is to understand the implications of your changes.
One of the planes I built was a Talon II and it had its wing split between flaps and ailerons. With pushrod control to the middle of the ailerons they were nice and powerful yet reasonably light. I was comfortable in 15 knot direct crosswinds which is saying something when you land at 35 knots. But it was designed that way and I made no significant changes.
Kolbs are great little airplanes with an excellent record. If you want to change it that is your right but do be careful. If I were going to build another one I would start with smaller ailerons outboard of nice big flaps. But that is just me.
Jim
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Sun Aug 12, 2018 12:26 pm Post subject: Spades |
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Kolbs don't stall inboard first. If they did, Flaperons equipped models would be falling out of the sky.
Don't take my word on that. I can't explain why Kolbs don't stall inboard first, but I know they don't through "actual" experience. That's like our elevator hinge attachment. I can't explain why it works, but I know it does without a doubt. Its history.
I'm surprised you haven't checked wing incidence. It may be correct or it may be way out.
It doesn't matter to me whether you droop your ailerons or not. I think you have a bigger problem in aircraft rigging. I don't recall Kolbs wanting to climb like yours. Normally they need nose up trim.
I don't know anyone that can fix your Kolb through email.
john h
mkIII
Titus, Alabama
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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