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Carbon or Aluminum Wing tubes

Old 03-13-2014, 07:15 AM
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Bob_B
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Default Carbon or Aluminum Wing tubes

I'm looking for a source for a 19mm OD wing tube.
Thanks,
Bob
Old 03-13-2014, 07:43 AM
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Harley Condra
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19 MM works out to .748, which is almost 3/4". or .750
what wall thickness do you want?

Here's a source for CF tubing in 19mm x .540 wall x 48"
http://dragonplate.com/ecart/product...D=4859&cID=102

Last edited by Harley Condra; 03-13-2014 at 07:46 AM.
Old 03-13-2014, 08:18 AM
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Harley are CF wing spars normally pultruded? The reason I ask is I need some tubes too and I am almost more comfortable using aluminum as I know what I will be getting (performance wise) and I can size for what I need. The weight is less of an issue for me. And they bend, too!
Old 03-13-2014, 08:23 AM
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Bob_B
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Originally Posted by Harley Condra View Post
19 MM works out to .748, which is almost 3/4". or .750
what wall thickness do you want?

Here's a source for CF tubing in 19mm x .540 wall x 48"
http://dragonplate.com/ecart/product...D=4859&cID=102
the current tube is not very symmetrical it measures .036 on one side .048 on the other.
This is the main wing tube so I am open to suggestions on this.

The length is 20 inches
Old 03-13-2014, 09:12 AM
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RCISFUN
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Bob,

I purchase a new spar from my Dragon here:

http://www.speedymetals.com/pc-4565-...-aluminum.aspx
Old 03-13-2014, 09:15 AM
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RCISFUN
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Bob
In aluminum, 19 mm is not a standard,I have found either 18mm or 20 mm O.D.
Old 03-13-2014, 09:25 AM
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RCISFUN
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3/4" CF tube

http://store.clearwatercomposites.co...750-tw-36.html
Old 03-13-2014, 10:12 AM
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Originally Posted by Bob_B View Post
I'm looking for a source for a 19mm OD wing tube.
Thanks,
Bob
Try RC Foam at: www.rcfoam.com.
They have a huge selection of C/F tubes that I have used successfully for years.
Greg
Old 03-13-2014, 10:53 AM
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Harley Condra
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Graves Hobby Shop in Orlando Fl. has two 48" long carbon fiber tubes of 3/4" diameter. Same as 19mm for all practical purposes. I was there about an hour ago. and checked them out.
I have seen the process of winding CF tubes on mandrels, but alI I know about pultruded tubes, is that all of the fibers are aligned lengthwise. It is the "Uniderctional" type of CF tubing.The ones at Graves are very stiff.
Old 03-13-2014, 11:09 AM
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Bob_B
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Thanks Harley!
Old 03-13-2014, 02:31 PM
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Hello:
Why that measures ? 20mm is more normal for me, but 19 ?
I use strong aluminum in my models. In carbon 20mm you can find tubes with 1 or 2mm of walls.
http://www.petrausch-modellbau.de
http://www.online-shop.carbon-compos...st=KAT11-10113
http://www.clipcarbono.com/es/100-30...o-1000mm-.html
Regards from Spain.
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Old 03-13-2014, 06:23 PM
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http://www.sdshobby.com/19171000-mm-...3b93f46b48a533
This company sells carbon fiber tubes in a variety of sizes. I have ordered one of the larger sizes for my 50cc plane and it looks good to my untrained eye.
Old 03-13-2014, 08:40 PM
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I have been using aluminum wing tubes for years. The worst part is drilling the holes. I get 1" diameter .055 wall thickness from Ace Hardware. I used a 48" long wing tube in my Big Slowpoke scratch built plane. It's about $2.50 per foot. The Slow Poke in the picture weighs 38 pounds and could handle full power loops. It expired May 6 2010 because the Robart control horns on the eleavators failed. The wing tube didn't.
Larry Kopecky
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Old 03-13-2014, 10:53 PM
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what wall thickness do you want?

Old 03-14-2014, 02:48 AM
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I looked here: http://store.clearwatercomposites.co...750-tw-36.html

Their tubes have a .063 wall thickness. The tube that came with the model had uneven wall thickness which concerns me.

Thanks for the link Rich, and thanks to everyone that responded.
Old 03-14-2014, 06:23 AM
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TnT has a large variety of tubes and sleeves;

http://www.tntlandinggear.com/welcom...ne_catalog.htm
Old 03-14-2014, 08:00 AM
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Aluminum tubes are a pain in the ass.
Old 03-14-2014, 08:05 AM
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I have ordered tubes from these guys on several occasions. I have been quite happy with the quality and delivery times. I usually have them in less then 2 weeks.


http://www.ebay.com/itm/19MM-OD-X-17...item338b09e3f9
Old 03-14-2014, 09:24 AM
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I too have used TNT for my source of wing tubes, they sell both carnon and aluminum... http://www.tntlandinggear.com/welcom...ne_catalog.htm
They are a very good company with good customer service. Why use aluminum when CF is stronger and lighter... just my opinion.
Old 03-14-2014, 09:28 AM
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What plane is this for? i was looking for a carbon tube for my GP Revolver. I think it was 19mm also. i eneded up getting one from Troybuilt models I think. Look at replacement tubes for stabs.

Carbon is much stronger than aluminum. IF I need more strength id will add a balsa core to it.
Old 03-14-2014, 11:38 AM
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Originally Posted by airraptor View Post

Carbon is much stronger than aluminum. IF I need more strength id will add a balsa core to it.
Only if it is laid up properly. Most of these sources are very reputable. Of course aluminium sort of has the same issue, you need to buy from a reputable vendor that uses the proper material.

A core material is a great idea too.
Old 03-14-2014, 02:57 PM
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The core adds to it as it is like sheer webs and performs as a anti-crush material so that it wont crack or crease like aluminum does.
Old 03-14-2014, 04:19 PM
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Whatever you do, don't get the Ace hardware tubing. May be ok for light g loading, but it's usually "Plano" aluminum, whatever that is. T-6 tempered 7075 or 6061 tubing in thick wall should be available. I get it locally by the joint at commodity pricing-last time was Great Western Metals and before that was Farmers Copper. I think it's used for full scale or something like that.
Old 03-15-2014, 08:32 AM
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Harley Condra
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My understanding of "Plano" aluminum, is that it is 1100....pure aluminum with no other alloying elements. It is usually called "Architectural Grade".

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