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HomeAircraftHelicopterAlignOther › Foam Wrap on the electronics
02-06-2008 08:28 PM  10 years agoPost 1
crofty

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Phoenix, AZ - USA

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All the pictures I see show foam wrap on all the electronics. Any evidence that it actually makes a difference? Anyone been crashing without it without causing any damage and vice versa?

I have nerves of steel but thumbs of jelly!

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02-06-2008 08:41 PM  10 years agoPost 2
lovespicyfood

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Westlake Village, CA- U.S.A.

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I'm interested in this too! It seems to me that some people use the foam and some do not. I did not use any foam on my electronics. I used velcro and I also used straps of velcro tied snugly around my electronics.

I surmise that the foam does add a bit of vibration dampening in a vibration prone setup, but does it make that big of a difference? There is certainly some vibration attributes of velcro also.

Pete

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02-06-2008 09:10 PM  10 years agoPost 3
2DMAX

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Clwyd, UK

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My Raptor 60 went in hard with a foam wrapped receiver, but it was no protection. It bent the receiver like a boomerang. Since then i have been using a receiver box on my Trex 600 to protect it. Although now i've changed to 2.4G on my Futaba, i've changed back to foam because of the twin aerial installation.

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02-06-2008 10:41 PM  10 years agoPost 4
WiscHeli

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Wisconsin USA

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i only use foam between frame and RX Dbl sided tape and a tie wrap if you crash foam will not protect it if you hit hard .. i want to find the tape thats Gel not foam ... any one know were to get it ??

T-Rex450seV2,, 600N-Pro ..500CF... Jr 9303 Syn 72Mhz

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02-07-2008 12:58 AM  10 years agoPost 5
Sam2b

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Tacoma, WA

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Foam is good to absorb the engine's micro vibrations. Where ever you can help it, protect the electronics as best you can. Thin double-back tape will not help the vibration absorption.

Imagine if you were able to tightly hold on to the heli's frame for 5 whole minutes while the engine is revving up to head speed. Your hands would be numb with the large buzzing sensation. That is what your electronics are taking. IMO you don't want that.
i want to find the tape thats Gel not foam ... any one know were to get it ??
I believe you're looking for Zeal Vibration Absorption Tape
.

I use foam wrapped around my receiver, battery, and a layer between the frame and regulator.

_Sam B_

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02-07-2008 01:35 AM  10 years agoPost 6
lovespicyfood

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Westlake Village, CA- U.S.A.

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Hmmmmm...makes sense to me!

I'm really into preventative maintenance so I'm going to do this. I don't think it'll be that hard, just wrap the bits up in foam, use the align velcro straps and put it in the same position.

Thanks!
Pete

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02-07-2008 02:03 AM  10 years agoPost 7
WiscHeli

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Wisconsin USA

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Yes Thanks Sam

T-Rex450seV2,, 600N-Pro ..500CF... Jr 9303 Syn 72Mhz

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02-07-2008 02:08 AM  10 years agoPost 8
gftazz

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upstate N.Y. in the Adirondacks

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Sam2b is absolutely right especially since velcro use became widespread.
The reason for the foam wrapping is really for vibration protection, vibration cushioning, and possiably crash protection in the right circumstances. Since I switched to 2.4GH I don't wrap my AR7000 receivers I just use velcro to attach to heli you know the 2 sided hook and fuzzy type so that you can remove it when needed and be able to reattach it at will. I still use a wrap around piece of velcro for safety retaining to the radio tray too. Also use velcro same setup on the gyro amp box controler and governor box.
In the 72mhz days most all people wrapped everything in protective foam.

Tom

Oh No Someone Please Stop Me Before I Go Broke With This Heli Thing!!

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02-07-2008 03:08 AM  10 years agoPost 9
JAGNZ

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Auckland, New Zealand

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I even wrap foam rubber around my 2.4GHz Rx, just behind the twin antennas out the front. I wrap everything I can in foam rubber, otherwise I use thick padded double sided tape. Vibration damping of electronics is crucial IMO.


Jason Greenwood

www.3dheli.co.nz

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02-07-2008 07:50 AM  10 years agoPost 10
crofty

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Phoenix, AZ - USA

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Interesting feedback.

I can understand that engine vibration is a big factor. So why isn't the engine mounted on some sort of rubber/vibration isolation mount? Anyone ever seen that?

I have nerves of steel but thumbs of jelly!

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02-07-2008 08:21 AM  10 years agoPost 11
Sam2b

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Tacoma, WA

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So why isn't the engine mounted on some sort of rubber/vibration isolation mount? Anyone ever seen that?
Good thinking, but that would not work out too well to having wobbling engine on a heli. Maybe a very stiff anti-vibration material of some sort between the engine and mounting block, but that's it. Fiberglass frames (silver color, Trex sport kit) are supposed to be more vibration absorbing and carbon fiber. Theoretically it would make for a more quiet helicopter, not resonating the sound. I see engine vibration as the inevitable evil of helicopters.

One guy found out the hard way by having a three engine mount bolts begin to come loose, and he wondered why he had strange head wobble and tail wag. The engine was wobbling around.

I used special soft mounts on my nitro airplanes and it eliminated a good 70% of the vibration, so much so that you could comfortably hold the aircraft in your hands while you are revving full throttle. But the cost was having an engine that literally wobbled so bad it looked like it was going to fall off the firewall while idling! Obviously it never did fall off.

_Sam B_

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02-07-2008 06:42 PM  10 years agoPost 12
crofty

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Phoenix, AZ - USA

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Obviously it never did fall off.
or it fell off once?

I have nerves of steel but thumbs of jelly!

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02-07-2008 07:23 PM  10 years agoPost 13
Sam2b

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Tacoma, WA

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or it fell off once?
No, I said it never fell off.

_Sam B_

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02-07-2008 07:31 PM  10 years agoPost 14
baddynergy

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sierra madre, ca- usa

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I can understand that engine vibration is a big factor. So why isn't the engine mounted on some sort of rubber/vibration isolation mount? Anyone ever seen that?
It cant be done. On most Helis the gear mesh would be effected if the engine was allowed to vibrate around. The engine shaft needs to be held in a straight line all the way through the clutch housing.

I dont bother wrapping my electronics anymore. For the Rx I use velcro only and a velcro strap. The rest of the electronics get a layer of foam under them and then velcro straps to hold them in. It is too much of a pain in the field to have to unwrap everything to change setting, and the very little crash protection it offers isnt worth it IMHO.

When I put my bird in, it goes in HARD. And no amount of foam is going to protect the electronics.

**Unattended children will be givin a shot of espresso and a puppy**

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02-07-2008 11:18 PM  10 years agoPost 15
Anthony.L

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Seattle, WA

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So why isn't the engine mounted on some sort of rubber/vibration isolation mount? Anyone ever seen that?
Because with heli's the mounting of the clutch bell and pinion/spur have very specific tolerances that a soft engine mount would not meet.

In boats you have a flex shaft, so slight engine movement is not an issue. In planes you have a prop in open air, again slight engine movement not an issue. In helis, any movement would be cause major problems.

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02-08-2008 01:25 AM  10 years agoPost 16
ckoelliker

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St. Simons, GA

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I had a relion battery go out on my 600n. It resulted in a pretty nasty crash. I did have a piece of foam, but it was not that thick. I guess it could have been just bad luck, but I now have it wrapped in a thicker piece of foam. Relion sent me a new battery, even after I explained that it might of been because I did not have it wrapped sufficiently.

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02-08-2008 02:05 AM  10 years agoPost 17
Sam2b

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Tacoma, WA

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Type of foam rubber
Just to note what sort of foam rubber should be used:
http://www.readyheli.com/Protective..._4_p/dub513.htm

This foam rubber is 1/4" thick, has a grippy texture that resists sliding, and is very absorbent of vibrations. Don't use just any foam.

_Sam B_

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02-08-2008 03:13 AM  10 years agoPost 18
baddynergy

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sierra madre, ca- usa

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http://www.zoomsheli.com/products.aspx?CategoryID=60214

Look here at the hirobo foam wrap. It is much more durable than the white stuff. Or you can get a sheet of neoprene wet suit material from the local sporting goods store,which IMHO is about the best stuff you can use, and its cheaper..

**Unattended children will be givin a shot of espresso and a puppy**

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