Fellows. . .LSF023 here. I'm reading the various posts on servo mounting
and looking at the ideas shown in websites mentioned and would humbly like
to make a suggestion for another way to go that is easy, works in very thin
wings, firmly mounts the servo and readily allows removing it. 

I direct you to the RDS website,
http://www.proptwisters.org/rds2/index.html. From the opening page, click
on INSTRUCTIONS to get into the MAIN INSTRUCTIONS. These were updated just
today with NEW pertinent text, sketches and photos.
 
Although what is in there addresses the all-internal Rotary Driver System,
the part about servo mounting applies equally well to other installations.
I think most everyone is overlooking something obvious, very simple and
totally practical. 

Page to the 2 side by side thumbnail sketches and click to bring these up
full-size. Look at what is referred to as "hat bracket" mounting in the
left sketch. 

The base involved does not need to be more than 1/32" or so thick since no
screws have to go into it to secure the servo! Instead the screws go into
the rails on the base. I find a 1/4" wide rail, capped with ply so it won't
split out, to work just fine. I can use 3/8" screws without worrying
they'll punch through the skin. Bases can be made as wide as is deemed
necessary to spread the loads on the skin. Rails can be as broad as you
like and more than one screw can be used each side if you wish.

Look. . .when overhead space is a premium, why would you want a thick base
under a servo, except to run screws into? Using those auxiliary side mounts
as come with the Hitec servos, etc. still requires a thick base for screws
and there goes your overhead space if you aren't into $65-$100 super-thin
servos. 

Since a center-mounted side mounting flange is a rarity in lower cost
servos, hat bracket mounting is a practical option. 

In the website mentioned, page to the THREE PIECE WING section and look at
the pics there that show such mounting in my GENIE wing, which is rather
thin. 
I used Volz servos, but I tell you there was no overhead space for those
neat, laser cut, dedicated ply bases Volz provides. . .NO WAY, so I did it
my way! The highlighted word "GENIE" in that section is a link to my 12'
span vacuum-bagged competition ship website. This ship is no wimp and
requires very solid servo installation using the Rotary Driver System. 

Page to the MOLDED WINGS section for some suggestions regarding servo
mounting in such wings using the hat bracket method. 

.025"-030" aluminum works well for the bracket. Size them so the screws
cinch the servo down tightly so it can't move. I made up some little forms
over which to size the brackets for servos I regularly use, rather than
trying to individually eyeball and bend them to fit. 

 

----------
> From: Jim Miller <[EMAIL PROTECTED]>
> To: The Love Villar family <[EMAIL PROTECTED]>; soaring
<[EMAIL PROTECTED]>
> Subject: Re: [RCSE] Servo Mounting Article by Paul Ferguson?
> Date: Saturday, October 07, 2000 9:15 PM
> 
> http://bigglesworth.com.au/ssl/technical/servo_mounting.PDF
> ----- Original Message ----- 
> From: "The Love Villar family" <[EMAIL PROTECTED]>
> To: "Jim Miller" <[EMAIL PROTECTED]>
> Sent: Saturday, October 07, 2000 9:14 PM
> Subject: Re: [RCSE] Servo Mounting Article by Paul Ferguson?
> 
> 
> > On 10/7/2000 8:39 PM, Jim Miller wrote:
> > 
> > > Nevermind, found it...
> > 
> > Where?
> > 
> >  -- Keith
> > 
> 
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