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Old Jan 28, 2013, 09:19 AM
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R.M. Gellart's Avatar
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Originally Posted by Wiker View Post
I donít know. I speak Norwegian, but that didnít help me much with that German video.
They all look the same to me, so I'm screwed, LOL!

Marc
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Old Jan 28, 2013, 09:29 AM
Detail Freak
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Harbor City, CA
Joined Oct 2003
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Quote:
Originally Posted by satinet View Post
on the other hand the servo can also put force back in to the servo to cause it slide, which isn't what you want either.
I don't think that matters at all in RDS, Tom.
Only securing the servo radially is what matters. That and gear slop, and torsional stiffness in the wiper and shaft.

R,
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Old Jan 28, 2013, 10:12 AM
Challenge is rewarding
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San Diego, CA
Joined Aug 2004
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Quote:
Originally Posted by target View Post
I don't think that matters at all in RDS, Tom.
Only securing the servo radially is what matters. That and gear slop, and torsional stiffness in the wiper and shaft.

R,
Target
And bending stiffness of the shaft I'm looking forward to hearing the results.
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Old Jan 28, 2013, 10:28 AM
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United States, CA, San Diego
Joined Apr 2007
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Hey..

Can't the pocket shape be changed to facilitate the proper shaft position at each point in the range of motion (con vexed or con caved or whatever shape you want to control the movement)? I want my servo's to stay put! So, once the exact shape is determined, a CNC'd pocket can be made out of some tough light stuff and inserted into the pocket space and glued in. No more custom installs or moving parts to come loose and/or flutter... Just thinking!

Phil
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Old Jan 28, 2013, 06:08 PM
Detail Freak
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Harbor City, CA
Joined Oct 2003
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I don't follow you, Phil....
I'm not sure if you understand what the issue is...
The bend of the wiper ideally will stay centered over the hingeline. On a bottom hinged surface, that means the bend needs to be slightly forward of the hinge line with reflex, and aft of the hinge line with down travel.
Its not TOO big an issue with normal aileron travel.
But with flaps, it becomes advantageous for the bend to travel for and aft to stay in the proper location.
That's a simplistic explanation. There are a lot of other variables.

I hope that helps, and if I am missing your arrangement my apologies.

R,
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Old Jan 29, 2013, 09:59 AM
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Portland, Oregon
Joined May 2002
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So is the axially movable RDS frames offered by Ober one of the best solutions out there right now to keep the wiper bend over the hinge line? Are there any disadvantages to this design?
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Old Jan 29, 2013, 10:22 AM
Detail Freak
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Harbor City, CA
Joined Oct 2003
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I can tell you that one advantage should be ease of servo removal. Should make it super easy to get a servo out should you ever need to, you will have room to slide the servo back.
If it works as it is intended to, it should be an improvement. I would think it would help eliminate any tendancy to double center, and also allow more the power of the servo to actuate the surface, by allowing the wiper to be in the ideal spot.

R,
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Old Jan 29, 2013, 10:44 AM
4 wheels move a body; 2 a soul
Saratoga, Ca
Joined Feb 2004
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Yes I too thought about servo access with this set up. We will know very soon here.
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Old Jan 29, 2013, 08:19 PM
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United States, TX, Dallas
Joined Mar 2009
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Less complicated RDS frames that allow back movement of the servo for quick removal:

http://www.rcsolutions.ch/index.php?show=64

They work great, I successfully changed a servo during and it was really simple and quick.

However, a sliding servo mount for the flaps would be really great, especially for the flaps.

Reto
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Old Feb 02, 2013, 09:06 PM
F3B and F3K
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United States, TX, Dallas
Joined Mar 2009
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Shimming slopy RDS pockets with u shaped stell sheet

Hi Gents

I have a new plane that had some slop on some surfaces and I located the problem to be wear in the pocket.

I had tried shimming with thin steel foil, but the inserts always worked their way back out when the RDS was actuated.

Then I had an idea. I completely uninstalled the RDS (i.e. removing the torque rod with the wiper). I then folded a thin steel foil into a U and pushed it into the pocket. I then tested if I can still push the wiper in (it was hard, but possible). Then I just reinstalled everything.

The U makes sure that the shimming always stays in the pocket, essentially the wiper keeps it in.

Worked like a charm and the RDS is again as tight as it gets.

Reto
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Old Feb 02, 2013, 10:45 PM
Detail Freak
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Harbor City, CA
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Is there any downside to metal on metal in RDS?

R,
Target
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Old Feb 10, 2013, 02:09 AM
4 wheels move a body; 2 a soul
Saratoga, Ca
Joined Feb 2004
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Well my Ober sliding RDS are in. Im not home so havent seen em yet. Will start installing them in Needle this week.
Walter
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Old Feb 10, 2013, 03:38 PM
Registered User
Toulouse , France
Joined Dec 2007
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Sliding frame from Ober for MKS, in my Shooter :

http://www.f3news.fr/t320p210-une-ex...ite-le-shooter
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Old Feb 10, 2013, 04:26 PM
4 wheels move a body; 2 a soul
Saratoga, Ca
Joined Feb 2004
1,462 Posts
Ober RDS Pics

New Ober RDS pics before install. I got two planes worth.
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Old Feb 10, 2013, 04:27 PM
4 wheels move a body; 2 a soul
Saratoga, Ca
Joined Feb 2004
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Couple more pics

Two more pics.
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