[NSRCA-discussion] Elev Servo's in the stab Pros vs Cons?

[rcmaster199 at aol.com]

About 2-56 steel rods...whether adequate or not for the 2 meter jobs. I think this material is borderline even in short lengths of 4-6 inches. I've had rods bend like pretzels before. 



I employ 1/8" carbon tubes to reinforce the steel when steel lengths are in this range. The tubing has .078" ID and fits the typical 2-56 rods perfectly. It weighs next to nothing but adds terrific bending strength to the rod. I highly recommend it for a significantly lighter solution than 4-40 rods and clevises
MattK

-----Original Message-----
From: Archie Stafford <rcpattern at stx.rr.com>
To: 'NSRCA Mailing List' <nsrca-discussion at lists.nsrca.org>
Sent: Mon, 20 Aug 2007 12:35 pm
Subject: Re: [NSRCA-discussion] Elev Servo's in the stab Pros vs Cons?





Tim,

 

I think this is 100% personal preference.  I’ve flown both, and flown both in the same design, and I still prefer the DEPS system.  I am currently fly my VF3 with the DEPS with a single 9254 Futaba heli tail rotor servo.  First saw that servo being used by CPLR.  Only 50+ oz torque, but lightning (.04) fast at 6V.  Once again though, this is personal preference or could be necessary depending on your CG.  They both work great though.

 

Arch

 

 




From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of rcmaster199 at aol.com
Sent: Monday, August 20, 2007 11:22 AM
To: nsrca-discussion at lists.nsrca.org
Subject: Re: [NSRCA-discussion] Elev Servo's in the stab Pros vs Cons?


 

Have tried all of the above methods and all have advantages anbd disadvantages. My new design will have dual elevator servos in the stab. I will use a pair the mini superfast, lightweight JR digitals and couple them with 2-56 rods. The length of pushrods will be short

Matt


-----Original Message-----
From: twtaylor <twtaylor at ftc-i.net>
To: nsrca-discussion at lists.nsrca.org
Sent: Mon, 20 Aug 2007 8:47 am
Subject: [NSRCA-discussion] Elev Servo's in the stab Pros vs Cons?




I have a new secret weapon I’m building. Not having built and airplane in many years I started looking at what type of elev push rod system to use. I’ve looked at the Deps, two servos in the stab, pull pull cables and a single push rod with a Y.



 



The pull pull seems to be the lightest and possibly the easiest way to go. The twin servo’s also seems easy but adds another servo.  I don’t have the small servo’s required so that’s a consideration as well. The deps seems to be a good way but possibly the hardest of all to install. The old tried and trued Y pushrod is what I’ve used for years and have always used a bearing tube where it exits the fuse. This is a composite fuse already painted and I’d rather not screw it up by trying to put a former for the rear of the pushrod Like Dave has in the Focus.



 



I also am debating using the Tetra push rods for the ailerons even though they’re 2/56 push rods. We used to use them on rocket ships of the past and I was wondering if they would be fine on this aircraft because we fly slower now.



 



Pro’s Con’s?  





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