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Finished Product:
The finished product looks like Picture #3
(above) showing the elevator servo connection. The
picture shows a JR 8417 digital servo side
mounted.
The servo arm is a Hangar 9 aluminum
servo arm part #HAN3431. It fits the JR servos. The
ball link is a NMP Dual
Axis rod end with the 2mm screw going through
the servo arm. The titanium fitting going into
the CF pushrod is the 4-40 fitting for the 5/32”
hollow pushrod.
Picture #4 is the elevator horn connection side.
This picture shows the MK medium aluminum
control horn, and the MK 2mm ball bearing
clevis. The female titanium pushrod fitting is
connected to the 0.070” CF rods using 30min Zpoxy resin.
Final Notes:
Some more info on Servo choices
My choice for elevator
servo on a single setup is anything with about
80-90 oz/in of torque. This is over-kill for
sure, but you can never have too much power. The
JR 4131, or 8101 are great servos in the analog
world. They offer very good precision and a
strong power curve.
If you want to go
"digital”… I use the JR 8231, JR 8417, or the JR
8411SA. The 8411SA is a superb choice for this
application. In my opinion, you can never
have too much servo. Especially on a F3A Pattern
model you can never say the servo is too strong
or too precise. I also use the Hangar 9
aluminum servo arms. These are rigid and do not
allow any flexing.
I use this pushrod system
exclusively right now on F3A models for elevator
control. So far, it’s the lightest and
stiffest connection I've seen. You have to
grab the elevator halves and try to flex them
opposite of each other to really appreciate the
benefits of the this pushrod setup.
As for Radio interference
issues because of the CF rods, I've had none.
I fly JR PCM “S” receivers in my F3A models, and
run the antenna inside a tube in the fuse. I've
also flown JR PPM “FM” receivers with no
troubles. Your mileage may vary but I see no
issues using the CF rods in the fuse.
Well, I think this sums it
up really well. Its long but covers the bases.
The opinions above are my own and do not reflect
on any business or company providing the
materials. The advice included is worth exactly
what you paid for it. Just that: Opinion
and Advice!
Any Questions? Send me an Email
Troy Newman
troy_newman@msn.com
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