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"Turbulators"

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Old 11-17-2004, 12:36 AM
  #1  
tunabiker
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Default "Turbulators"

I'm building an old Wanderer kit and thought I'd put in some turbulators (?), the strips/sticks running horizontally across the front of the ribs in the center wing panel. But, I don't know how to cut the notches in the ribs and make them parallel and clean and not trash the spars...the kit is from the 70's. I'm encouraged that a Wanderer '99 has them as standard to the kit, so I'm sure it can be done, but I'm ignorant as to how to do it. I can stack the ribs, but there must be a fairly reliable way to cut notches.

I have a scroll saw, but the bite is relatively shallow.
I have a few files. Would this be good?
I'm uneasy about taking a #11 blade to a stack of ribs...I'm sure the cut will get crooked as I go down.

If someone can get me over my jitters, I'd sure appreciate it.

Thanks for any help you can give.
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Old 11-17-2004, 09:49 AM
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smoking joe
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Default RE: "Turbulators"

Tunabiker I've always waited till wing was finished, used straight edge to mark placement of turbalators, 1/8 th sguare spruce and used small piece of spruce with sandpaper glued to it and sanded notches in ribs to correct depth. Easiest way I have found to do them. Good luck. Joe
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Old 11-17-2004, 11:46 AM
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SoCal GliderGuider
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Default RE: "Turbulators"

Mark the cut with a straight edge after the wing is assembled. Cut down with a 32 tpi saw and break out the balsa. Don't worry about cutting too deep. Just don't cut the rib in half! These 1/8" square stringers really are not turbulators. A turbulator has to be a sharp ridge at least 0.010" high to do any air flow disruption. These stringers are more of a covering support to gain back the intended airfoil shape.
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Old 11-17-2004, 03:28 PM
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Default RE: "Turbulators"

OOPS!! I'm finishing my Riser 100. The wing has turbulators that I guess "were" made to be above the rib. Not any more they don't. I thought it was poor laser cutting and sanded the notch lower.

Keith

P.S. Stop laughing SmokingJoe
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Old 11-17-2004, 04:11 PM
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smoking joe
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HMMMMMMMM!!!!
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Old 11-17-2004, 04:16 PM
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Hey, what do I know. I guess it will go fast, STRAIGHT DOWN.
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Old 11-17-2004, 06:46 PM
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tunabiker
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Default RE: "Turbulators"

Thanks for all the advice! Whatever they're called, yes I want it to more closely shape the covering to the rib profile. Is this a good idea? A buddy said I was actually upsetting the airfoil effect by putting two or three spars in there. I know the plane flies well without it; will it fly better with it?
Thanks again...Tunabiker
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Old 11-17-2004, 07:16 PM
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Default RE: "Turbulators"

the turbulator sticks make a big difference for slow flight - just an observation
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