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Old Jan 13, 2012, 09:43 PM
Pismo is offline
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Jim in San Diego
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Ok, I don't know what it is but this always bugs me:

Is there a proper length to use for the torque rods and tubes? I can see from the drawings that the cut in the aileron is 4" from the root and I can figure out the bends/lengths for the root but what about the outboard bend and tube? I think on my other planes I just made the bend where it looked good and made the tube long enough to just be able to hold the rod for the last 90* bend. If I go by the dwg, 1" - 1.5" looks about right.

Once again I'm over thinking this because I don't want twisty or fluttering ailerons and don't know if this has much effect on those things. I figure while I'm learning I might as well ask. I'll go get a beer and if I don't see a reply by the time I return I'll bend it like before. Starting to see why I take so long to build a plane or two?
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Old Jan 13, 2012, 09:50 PM
steve wenban is offline
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Crikey never leave beer behind
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Jim ,
When I was suing torque rods they where always a 1/3 into the span of the surface . The only time I ever suffered flutter was with and aerobatic machine and I thought I'd discovered gold with using the plastic from an Ice cream tub as hinge material DOH!!!! damn thing flutterd in a dive and blew 1 aileron clean off ,was able to land it and relpace the hinges but the lesson was learn ,and I quote " ICE LIDS" good for mixing bondo on and not for hinges
Old Jan 13, 2012, 10:00 PM
he4gott is online now
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It was just a flesh wound!
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Originally Posted by steve wenban View Post
Something old something new pss fest I'm coming for you
It'll need some work the poor old girl but she's tuff
Yeah...and the plane could use some fixin' up too.

Dale
Old Jan 13, 2012, 10:23 PM
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Jim in San Diego
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Thanks Steve but I don't think that'll work for these ailerons. That would put me over 10" from from the root and over 6" from the break/cut. I think I would for sure be getting past the 4-40 torque rod's ability to hold the torque without twisting. One thing I know I don't like is spongy controls.

I'll use the TLAR method after eyeballing the drawings. It'll do
Old Jan 13, 2012, 10:27 PM
steve wenban is offline
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Crikey never leave beer behind
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Well then TLAR is the correct length ,its my well worn increment on the scale
Old Jan 14, 2012, 12:57 AM
RAFster is online now
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Anybody doing the Cobra II air racer by "Tex" Johnston?
Old Jan 14, 2012, 01:13 AM
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Just Toss It !!!
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Quote:
Originally Posted by Pismo View Post
....... I'll go get a beer and if I don't see a reply by the time I return I'll bend it like before........
That sounds like a threat......Are you threatening us?.....Hmmmm?.....Would you punch yourself if we didn't tell you???

Matin
Old Jan 14, 2012, 01:15 AM
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Just Toss It !!!
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Anybody doing the Cobra II air racer by "Tex" Johnston?
Yes I am!.....What is yours going to look like?

Matin
Old Jan 14, 2012, 01:47 AM
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Crikey never leave beer behind
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Yes I am!.....What is yours going to look like?

Matin
Like a Mustang is that wrong???
Old Jan 14, 2012, 01:50 AM
he4gott is online now
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It was just a flesh wound!
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Originally Posted by MATIN View Post
Yes I am!.....What is yours going to look like?

Matin
What?! Only one "Tex" Johnston allowed...?

Dale
wouldn't dream of doing a "Tex" Johnston....no red....no white....no zebra stripes...
Old Jan 14, 2012, 01:55 AM
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Jim in San Diego
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No threats from me Had my beer, bent some rods, and all is well. g'night.
Old Jan 14, 2012, 02:00 AM
MATIN is online now
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Just Toss It !!!
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What?! Only one "Tex" Johnston allowed...?
Dale
Yes!.....and if you had read page 69 of the manual you would have known that......

Quote:
Originally Posted by he4gott View Post
Dale
wouldn't dream of doing a "Tex" Johnston....no red....no white....no zebra stripes...
You could dress the pilot in some hot 70s outfit!... No?

Matin
Old Jan 14, 2012, 10:24 AM
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The 4-40 torque rod's are plenty strong. Flutter is most often caused by one of two things. louse ( sloppy linkage) or the distribution of weight in the aileron its self.
Old Jan 14, 2012, 12:27 PM
c0dem0nkey is offline
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I want it to go fast...
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Originally Posted by RAFster View Post
Anybody doing the Cobra II air racer by "Tex" Johnston?
I'll be going with yellow...but perhaps blue trim instead of black
Old Jan 14, 2012, 01:55 PM
SumthinsFishy is online now
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Airplane Killer
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Quote:
Originally Posted by RAFster View Post
Anybody doing the Cobra II air racer by "Tex" Johnston?
I was originally planning to. But I think I'm going with a non-scale scheme instead.


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