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Old Dec 28, 2012, 04:28 PM
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What is the inside diameter of the ballast tube?
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Old Dec 28, 2012, 04:39 PM
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Stefano,

I can measure my ballast first you tonight and let you know.

See ya,


Pat
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Old Dec 28, 2012, 07:52 PM
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Ballast tube is 16.10mm and the ballast is 16mm.
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Old Jan 03, 2013, 10:40 PM
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Bellevue Wa
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SL Aileron Wiper

Has anybody had to replace the aileron wiper on their SL wing? Any suggestions? It looks like I'll need to replace one in the near future. Thanks.

Mike
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Old Jan 05, 2013, 11:46 AM
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Quote:
Originally Posted by Hollymr View Post
Has anybody had to replace the aileron wiper on their SL wing? Any suggestions? It looks like I'll need to replace one in the near future. Thanks.

Mike
Have you damaged it? Quite unusual to damage an aileron wiper. Is it tape or epoxy?
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Old Jan 05, 2013, 12:27 PM
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It's scotch tape and folded over on itself.
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Old Jan 06, 2013, 03:14 AM
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Peel off the old one and just copy what Samba have done.

Or you can run a piece of scotch tape or similar along the length of the aileron (or split it into two lengths each side of the control horn) and then use talcum powder or microballoons to get rid of the stickiness. This also makes it look more like a normal white epoxy wiper as well.

The trick is to get the right amount of tape overhang and taper it towards the tip as the aileron gets smaller in chord. Also try and lay the tape without any tension in it.

Hope this helps...it may take a few practice goes
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Old Jan 07, 2013, 07:38 AM
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My elevator is not operating smoothly on the down travel and it is not an issue with the width of the slot.
It has something to do with how much the pushrods is pushed towards the bottom of the fuselage (bending).
I am thinking of cutting off 1/8" from the brass tube and the steel pin ...
Stefano
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Old Jan 07, 2013, 08:11 AM
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Is the elevator pin fully seating in the brass tube? Should be no more than ~1mm gap.

Tom
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Old Jan 07, 2013, 01:27 PM
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Tom,
the pin is all in the brass tube with no gap on top.
When the elevator is not in place the brass tube extends past the top of the levator saddle by a good 1/4" or more (will check again tonight). I think that with the elevator in place that 1/4"+ plus the down travel bends the push rod down and causes friction/binding where it exist the pushrod guide. This is just a guess.
Stefano
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Old Jan 07, 2013, 02:53 PM
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Actually, the down (or up) actuation should be doing the opposite - effectively moving the ball link upwards as it moves fore/aft. Could be the plastic link rubbing on an errant bump on the inner fuse right above it or something. I know it's tough to see inside, but try mounting the stab with the rudder off and see if you can peer in there with a flashlight while you actuate it.

Tom
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Old Jan 07, 2013, 03:04 PM
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I will check the elevator again tonight. On another subject, were you able to use 9mm servo horns for the flaps or did you use 11mm?
I think the horns on the flap surface are at a different angle from the Perfect and end up further forward of the hinge line.
Stefano
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Old Jan 07, 2013, 03:09 PM
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I don't recall...but whatever they are, they just barely protrude beyond the wing skin. Pretty sure it's the inner hole on the longer arm of the JR "star" horn.

Tom
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Old Jan 08, 2013, 04:33 PM
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Double checked the elevator operation with Thomas Cooke helping.
For down elevator the push rod moves forward but also downward because the pin is connected aft of the hinge line. This causes excessive bend in the bush rod and binding as it exists the guide. At this point my only choices are to try and separate the guide from the fuse to allow more flex or cut down the brass rod and steel pin. I can compensate for the shorter actuator by using a smaller horn on the servo.
I will post pictures tonight.
Stefano
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Old Jan 08, 2013, 05:23 PM
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How much throw before it binds? With the stab off, and the tube centered (i.e., at neutral position), when you push directly downward on the tube is it relatively "springy" with some give or is it really stiff?

Tom
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