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| Jet Aircraft Discuss Jets in Canada |
Topic Review (Newest First)
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| 04-25-2013 03:10 PM | ||
| Pepperpete |
Re: Metal or Plastic Servo Arm? Need advice. Thanks guys that will do nicely. |
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| 04-25-2013 08:56 AM | ||
| Pauld |
Re: Metal or Plastic Servo Arm? Need advice. I like these ones by JR. Have nice thick arm and metal ring around the spline post: http://www.horizonhobby.com/products...0mm-3--JRPA207 PaulD |
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| 04-25-2013 08:02 AM | ||
| Hughes500E |
Re: Metal or Plastic Servo Arm? Need advice. Standard: http://www.greathobbies.com/productinfo/?prod_id=DUB674 Long: http://www.greathobbies.com/productinfo/?prod_id=DUB671 |
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| 04-25-2013 06:17 AM | ||
| luv2flyrc |
Re: Metal or Plastic Servo Arm? Need advice. Quote:
http://www.horizonhobby.com/products...-2--JRPA215#t1 Mike |
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| 04-25-2013 12:48 AM | ||
| Pepperpete |
Re: Metal or Plastic Servo Arm? Need advice. Ok can someone please direct link me to the JR Heavy Duty Servo arms that many on here are using. I did do a search (not that lazy) but I'm pulling up all kinds of stuff. I want to make sure I'm buying the correct ones. The F-16 has JR 8611 servos. And the push rods are super long. From the center turbine spot all the way to the back tailerons. I am not a fan of this setup but it's what was designed. |
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| 04-24-2013 11:15 PM | ||
| Helijet |
Re: Metal or Plastic Servo Arm? Need advice. Servo arms are generally nylon. They are surprisingly strong as long as there is no twisting motion. It is more important that your push rods are straight and the pivot point on the surface is solid. I have seen more issues with control horns than servo arms in jets. Heavy duty nylon servo arms will work in most any application. My rule of thumb though is anything over 1 1/2 inch I will use metal as I dont want to have any twisting action. Keep in mind that deltas, tailerons and large rudders use large amounts of deflection. Rigidity and positive action is very important in control and reduction of flutter. These are surfaces where you should consider having the tightest servo control input. d.w. |
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| 04-24-2013 11:14 PM | ||
| Pauld |
Re: Metal or Plastic Servo Arm? Need advice. Quote:
So the question is, what's the configuration? The big no-no is a ball joint on a plastic horn  but I suspect U already know this.  PaulD |
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| 04-24-2013 10:51 PM | ||
| Hughes500E |
Re: Metal or Plastic Servo Arm? Need advice. I actually purchased a set of JR HD's for my Hawk. I did use metal arms on the mechanism for the flying stabs though. I'm a little freaked out about the Hawk destroying itself thus my decision. |
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| 04-24-2013 10:32 PM | ||
| kev-o |
Re: Metal or Plastic Servo Arm? Need advice. Jr heavy duty all the way |
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| 04-24-2013 09:55 PM | ||
| reo |
Re: Metal or Plastic Servo Arm? Need advice. personally, I always use metal arms in my jets and the big gas stuff.....just my .02 worth though....ron |
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