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HelicopterMain Discussion › Any issues with CF tail booms?
12-04-2017 04:17 PM  14 days agoPost 1
RM3

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Killeen, Texas - USA

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Hi guys...

Ive been flying my stretched Radikal G20 for quite some time, two years now I think... and it uses the G30s aluminum tail boom. But parts for both the 20 and G30 are getting harder to find. Im already having to make alot of my own which is getting to be a big PITA.

Now I have not been able to source a thin enough aluminum tubing to serve as a replacement tail boom without going to some overseas supplier (I dont like getting overseas supplies due to cost and shipping rates, minimum orders). I have found on McMasterCarrs web site tubing that is both rigid enough and the right OD... but its wall thickness is nearly 50% more, thus weight is more... and this throws off the CG of the heli quite a bit.

But what I have found is Carbon Fiber tube from McMaster-Carr that is of the correct OD (I need 1 inch) and a decent wall thickness.

So the question is this... How durable is a CF tail boom (running a TT setup BTW)... the weight is about the same as an OEM tail boom... but how do you think it fairs in a gasser where vibration is a fact of life... will it fray from the resin? any issues with cracking around the boom mount?

showing a preference will only get you into trouble, 90% of everything is crap...

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12-04-2017 04:43 PM  14 days agoPost 2
InvertedDude

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USA

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RM3

I wouldn't run it on a gasser. It will work, but will require a sharp eye on the entire CF boom and where you insert the CF boom in the boom holder.

CF is strong....vibs over time will weaken it. You are better off with metal.

I am not responsible and here is my disclaimer! It will work but keep an eye. IF your heli dies from it, don't call me!

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12-04-2017 05:20 PM  14 days agoPost 3
ICUR1-2

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Ottawa, Ontario

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Not all carbon tubes are made the same.
I think you would need something woven.

What if you make a tube adapter and reuse the ends of the old tubing. Slide a tube over it.

spending time, paying attention

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12-04-2017 05:42 PM  14 days agoPost 4
RM3

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Killeen, Texas - USA

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..its woven CF...
And I can make an adapter... but there I am again.. making parts

showing a preference will only get you into trouble, 90% of everything is crap...

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12-04-2017 05:50 PM  14 days agoPost 5
Pistol Pete

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Seffner, FL

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RM3
Ive used the raptor 60 carbon fiber boom with a slight modification for my Rad20.

http://www.rcfoam.com/carbon-fiber-...e%29-p-926.html

~~Enjoying the hobby one flight at a time~~

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12-04-2017 06:27 PM  14 days agoPost 6
RM3

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Killeen, Texas - USA

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So long term... No cracking or fraying at the points where its mounted to the frame at the edge of the boom mount?

showing a preference will only get you into trouble, 90% of everything is crap...

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12-04-2017 06:48 PM  14 days agoPost 7
MartyH

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USA

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If you support the woven carbon tube you should have no issues. Carbon is not subject to metal fatigue like aluminum is so you should get long service life. If you have a lot of vibration in your heli using either tube, you should really work to reduce it. I am running carbon booms on Raptor 50 and 90 (glow) with no issues. I know the gasser might be a little more of a vibration challenge.

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12-04-2017 09:12 PM  13 days agoPost 8
Pistol Pete

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Seffner, FL

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So long term... No cracking or fraying at the points where its mounted to the frame at the edge of the boom mount?
Long term...lol.

Unfortunately none of the two I bought lasted beyond crashes but I didnt have issues before. Sorry but I didnt keep track of how many flights I got out of them. Bit pricey by comparison but it is what it is...carbon.

Would I purchase them again? Yes.

I bought them at the time when Century didn't have stock way back then. Once Century did restock, I purchased a couple ALU before they ran out for the last time. Fortunately I havent crashed those...yet.

~~Enjoying the hobby one flight at a time~~

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12-05-2017 12:02 AM  13 days agoPost 9
EEngineer

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TX

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Another reason in favor of a CF boom, is that with a tail belt, the CF boom doesn't change length as much as an aluminum boom does with temperature.....

I like CF booms....and the CF looks "cool", as well as being lighter.......

Logo 600SXs, 800XX, TDR IIs

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12-05-2017 12:18 AM  13 days agoPost 10
InvertedDude

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USA

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EEngineer

Another reason in favor of a CF boom, is that with a tail belt, the CF boom doesn't change length as much as an aluminum boom does with temperature.....
That explains this part PV1347. I had issues with belt getting loose.

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12-05-2017 12:58 AM  13 days agoPost 11
helitom

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Pine Grove, Calif, USA

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I have been fling both Miniature and Century, some for a large number of flights, without any of the issues you are concerned about. I prefer the CF booms for the occasional "hard" auto which will typically bend an aluminum boom - but not a CF. Of course, any typical heli crash will destroy either a aluminum or CF boom.

The older I get, the fewer things seem worth waiting in line for.

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12-05-2017 01:22 AM  13 days agoPost 12
EEngineer

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TX

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For some reason, on the Logo CF booms, they have screw holes where the boom attaches to the boom holder.

So, I get some suitable small screws and the CF boom is fixed to it's holder such that it can't move in or out...nor can it rotate.

Logo 600SXs, 800XX, TDR IIs

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12-05-2017 04:48 AM  13 days agoPost 13
Four Stroker

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Atlanta

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19 mm = 0.748 in. MA tail booms are 19 mm.

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12-05-2017 12:22 PM  13 days agoPost 14
Eury

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Dover NH

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Four Stroker
19mm =0.748 in. MA tail booms are 19 mm
Older ones may have been, but the new ones are 22mm.

Nick Crego

Citizen #0168

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12-05-2017 02:45 PM  13 days agoPost 15
Four Stroker

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Atlanta

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Yes I meant the classic XCells. This guy should have booms for new ones: https://www.miniatureair.com/pages/about-us

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12-05-2017 03:38 PM  13 days agoPost 16
helitom

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Pine Grove, Calif, USA

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They also have (or at least, used to have) the 3/4" booms.

The older I get, the fewer things seem worth waiting in line for.

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12-05-2017 04:08 PM  13 days agoPost 17
Pistol Pete

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Seffner, FL

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InvertedDude
CF is strong....vibs over time will weaken it. You are better off with metal.
Someone needs to tell the automotive (Bugatti,McClaren) and aerospace (Boeing,NASA) manufacturers about this before it's too late.

http://www.dexcraft.com/articles/ca...n-of-materials/

~~Enjoying the hobby one flight at a time~~

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12-05-2017 09:06 PM  12 days agoPost 18
Four Stroker

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Atlanta

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They don't have the carbon booms. I have a spare metal boom.

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12-06-2017 12:20 AM  12 days agoPost 19
zapper

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USA

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Pistol Pete, Thank you for the excellent informative link of info on aluminium-vs-carbon-fiber-comparison-of-materials!

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12-06-2017 01:47 AM  12 days agoPost 20
EEngineer

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TX

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aerospace (Boeing,NASA) manufacturers about this before it's too late.
I think Boeing knows about this stuff...that's why I invest in them...

Take my word, it'll save your life someday.....LOL

Logo 600SXs, 800XX, TDR IIs

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HelicopterMain Discussion › Any issues with CF tail booms?
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