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T-REX 450 › Servo Guide
03-03-2008 02:25 PM  10 years agoPost 1
vidmarv

rrApprentice

ft walton beach, FL

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Is it absolutely necessary to use the guides for the tail servo rod? I'm using a 3400G and can't seem to get a straight shot from the servo to the tail via the guides. Presently, I'm running it without any guides, just straight from the servo to the tail and it seems to work fine. (about 6 flights so far this way) Am I courting disaster with this? What should I be looking out for? BTW, I am in the hole closest to the servo on the servo arm.

Thanks.

VM

Perfectly sliced air every time!

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03-03-2008 03:21 PM  10 years agoPost 2
Boidman (RIP)

rrKey Veteran

The Home Stretch

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When some of us get temporarily bored, we play around and at least pretend to test many things.

Your SA may have the carbon(ish) pushrod, but we tested the wire one too.

All kinds of mostly gentle flying can be done in the early stages of learning, without the guides. There seems to be only minor risks up until the first time you give hard left rudder, particularly when using that to stop or reverse a strong right piro. The wire pushrod will bow under less 'pushing' load than the carbon one, but they both can be made to bow considerably.

The hard left rudder input will result in a 'mushy' response, and the effect can be that a mild loss of control happens because you don't get what you want exactly when needed.

With a higher helicopter direction of travel induced cross wind, or an actual strong wind from the side, both types of pushrods can begin to vibrate, sometimes with surprising amplitude and frequency. At times, some gyros can misbehave while trying to deal with this.

For gentle flying around in under 10 MPH breezes, I don't think there are any real worries.

Many guys have bought some larger diameter true carbon fiber tubing, to make real good unsupported pushrods. Others make a custom support that attaches to one of the screws on the horizontal fin bracket.

You aren't risking a high-percentage possibility of a crash, as long as you are generally flying around upright and easy, but you should be working towards a solution much sooner than later.

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03-03-2008 03:48 PM  10 years agoPost 3
vidmarv

rrApprentice

ft walton beach, FL

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Carbon Fiber
Thanks for the input Boidman. Funny, I just purchased some larger diameter cf tube this weekend to make tail booms for my Blade CP. I'll give that a try for the servo arm rod. What you're saying makes a great deal of sense. It's been windy here in NW Florida the last couple of days and I think I've experienced what you are describing regarding "strong wind from the side" (15-18 kts). It would explain the intermittent tail wag that I've noticed during gust. I hadn't even considered a flexing servo rod might be the issue. Thanks.

VM

Perfectly sliced air every time!

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03-03-2008 09:25 PM  10 years agoPost 4
gene465

rrNovice

Milton, Fl-USA

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Vid, see you are somewhat near me where do you fly? I am over in Milton and got into Helos because I did not like drving to FT walton to race off-road anymore!

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