| Title: | Welcome To The Radio Control Conference |
| Notice: | dir's in 11, who's who in 4, sales in 6, auctions 19 |
| Moderator: | VMSSG::FRIEDRICHS |
| Created: | Tue Jan 13 1987 |
| Last Modified: | Thu Jun 05 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 1706 |
| Total number of notes: | 27193 |
I've come up with a neat fix for all you poor souls, like myself
that used sullivan golden rods for elevator and rudder control
and wished you had'nt. Golden rods makes for a simple and neat
installion but as I found out, they tend to expand and contract
a lot with temperature which makes them a royal pain in the but.
What I did was to purchase a sullivan "semi-flexable" cable. It
turns out that the yellow sheathing they supply with the cable
is the same stuff they use in the "semi flexable" red jacket
goldenrods. I simply cut the cable to the desired length and
solder to one end (rudder / elevator) a brass threaded coupler.
On the other end I take a brass threaded coupler and cut off the
threaded end, and drill out the remaining brass in the coupler
so that it becomes essentially a "thick" brass tube. I then take
the yellow golden rod and cut it to a length of 1/8" less than
the length of the cable from where it enters the threaded coupler
and from where it enters the cut brass coupler. This allows for
expansion/contraction. I then solder 1/2 of the brass tube
(cut coupler) to the cable. I solder a short peice of piano wire
with a Z bend (taken off my golden rod) to the other half of the
coupler.
This has worked out great. The trim does not change and the control
surface is much more positive now. I can move the rudder by hand
and the servo will move with the rudder in a very positive action
without any flexing.
Dave
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 847.1 | A Slight Variation I Used | LEDS::WATT | Fri Jan 20 1989 16:00 | 10 | |
I did a very similar thing on my SS20. I originally installed Golden
Rods and fought with the trims every flight. I then CA'd the yellow
inner tube in place and ran a solid piece of music wire down the
hollow center of the yellow tube. I attached the same brass threaded
couplers you described on the ends. This works fine if you don't
have any bends required at the ends. The wire is plenty stiff if
it can be straight. I don't think I would do this in a large plane.
Charlie
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| 847.3 | Where do you buy carbon fiber rods - what sizes? | K::FISHER | Only 50 Days till Phoenix! | Mon Jan 23 1989 08:50 | 10 |
> I have gone full circle back to pushrods in 10 years. I now use
> carbon fiber rods etc but am a much happier camper due to the low trim
> changes etc.
Eric - Where do you get carbon fiber rods?
Bye --+--
Kay R. Fisher |
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| 847.4 | Don't forget arrow shafts are good pushrod material too | TYCHO::REITH | Jim Reith DTN 235-8459 - HANNAH::REITH | Mon Jan 23 1989 09:08 | 0 |
| 847.6 | SA1794::TENEROWICZT | Mon Jan 23 1989 09:57 | 21 | ||
Kay. I often make a pushrod with carbon fiber. The material can
be had from Bob Violet. I usuall buy the .007 1/4"wide carbon
fiber strips. Two lengths and two pieces of balsa 3/8 x 3/16
are needed. Laminate the carbon fiber between the two balsa sticks.
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Then laminate the secong carbon fiber strip to one side of the
rod.
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The carbon fiber creates a "T" section.
Tom
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