elevator pushrod exits

[tph1 at bellsouth.net]

Thanks a lot Troy. Now I have a clear picture of what I'm doing. This is for a Temptation and the fuse isn't very wide from the elevator servo back so I didn't want a mess to clean up and add extra weight to the plane.
thanks again, Tom
> 
> From: "Troy A. Newman" <troy_newman at msn.com>
> Date: 2004/12/06 Mon PM 01:52:55 EST
> To: <discussion at nsrca.org>
> Subject: Re: elevator pushrod exits
> 
> The exits will depend on you servo and elevator control horn locations.
> These need to be mounted first.
> 
> Next locate the servo arm connection point and transpose this to the side of
> the fuse on the outside. We are going to project two lines down the fuse
> with a  long 3 or 4 ft straight edge.  Looking at the side of the fuse use
> the straight edge to connect the mark on the side of the side up at the
> forward servo connection and the top of the elevator control surface horn.
> I use masking tape on the side of the fuse near where I think everything
> will exit. I then draw a line on the masking tape along the straight edge. I
> use a pencil-sharpie(thin)-or a ball point doesn't really matter.
> 
> Next step is to transpose the mark on the side of the fuse to the bottom of
> the fuse.. Place the model inverted on the table or in a  stand...Apply a
> length of masking tape vertical to the fuse and wrap it around the fuse past
> the bottom seam or center location. Note if your servo connection point is
> not centered in the fuse you'll have to offset this belly starting point for
> the next projected line. My elevator connections are always in the
> center...So my 2nd projected line starts at the fuse seam. or in the middle.
> If your servo connection location is 1" off to one side then you need to
> make a mark on the masking tape in this location...This is projecting down
> thru the fuse..you are just transfer this location to the tape.
> 
> Now use your 4ft straight edge again and this time go from the forward mark
> on the belly out directly toward the control horns. Looking down from above
> put a mark on the side of fuse (on your masking tape that was done in the
> previous line projection down the side.) Where these two projected lines
> cross....This is your fuse exit location.  Depending on you fuse width,
> control horn spacing from centerline, and distances to the front
> servo...this slot is usually about 1.5 to 2" long. You will have to work the
> slot with a small round file to get the inside angles to prevent bending of
> the tubes as they exit..
> 
> Trial fit the whole thing into place and use the round file to open the fuse
> up in order to eliminate bending of the tube guides as they exit. This is
> what causes friction in the system. Also make sure that you have no friction
> when the rods are in the tubes, tubes attached to the balsa sticks, and the
> system is not in the model. All you want is to duplicate this non-friction
> condition by not having the tubes bending as they exit the fuse.
> 
> Its an easy thing once you try it. For reference my exits on my (2) Supremes
> are about 10inches in front of the elevator control horn locations. Yes 10
> inches of this 0.070" pushrod is un-supported. It is still stiffer and more
> solid than any other system I have seen or used. Depending on how wide your
> fuse is, where your elevator servo is located, how long the fuse is, and how
> far from the centerline your elevator control horns are will determine the
> exit locations.
> 
> On a fuse that is not painted or finished its cake...Make the slots bigger
> and allow the system to float. Then fill the excess gaps with some
> lightweight filler. If the fuse is wood and monokote-Ultraote and unfinished
> its easy a small sliver of balsa can be your filler. If its already covering
> with iron on covering then you can patch a mistake.
> 
>  If the model is done and painted...you have to be careful. I have done 3
> models recently that were finished painted and done. The exit slots can
> still be done clean and neat.
> 
> Good Luck, Its not that hard to figure out.
> 
> Troy
> 
> ----- Original Message ----- 
> From: <tph1 at bellsouth.net>
> To: <discussion at nsrca.org>
> Sent: Monday, December 06, 2004 8:51 AM
> Subject: elevator pushrod exits
> 
> 
> > I'm trying to figure out a way to get my Dual elevator push rod system to
> be installed correctly. How can I determine where the exit hole/slot will be
> in the fuse for this? I don't want to leave a 4" slot in the fuse as an
> Oop's either.
> > thanks
> >
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