Wing Spar

[Montee]

Anyone know of a local or online place to get wing spars.

[karlpenney]

What kind of wing spar? Both MH and MSC have carbon fiber rods and strips of various sizes.

[Montee]

looking for 6mm od x 4mm id x 800mm long. I went to maritime hobby and they have none

[AndrewS]

Try checking the kites at MH. A lot of kites nowadays have carbon rods, so one of them may suit.

Andrew

[steve]

Montee,

If you are looking for that exact product then searching will be easy, however, if you want to try alternatives to carbon fiber, then there are many.....locally available

Steve

[Montee]

I just ordered 3 from china for $21.00 Cdn with free shipping. I think thats a good price, isnt it!

[karlpenney]

Yes, not a bad price for 6 x 4 carbon tube. What was the website?

[Dirt Torpedo]

Not such a great price on the CF but you more than make up for it on the shipping. Nice.

[Montee]

Sorry I was wrong on the price it was $22.70 with free shipping. He has alot of stuff for sale on Ebay
http://shop.ebay.ca/bigdotunclercstore/m.html
most of his stuff is free shipping

[JohnOSullivan]

Be wary of what you buy in carbon rods.
Some may not e all carbon, but may be a carbon/glass mix.
For instance, John Hatt used to stock a mixture. the carbon/glass ones were significantly lower in price and for some applications were quite adequate. You can generally tell using a flex tests - the all carbon ones are much stiffer. You can also test by checking electrical continuity with an ohm meter.
Another thing to consider is the wall thickness of the tubing. Some are thin walled (0.5mm) which are great for lightweight applications, but can be deceptively weak in heavier applications. It's all a matter of sensible sizing.

I have been very impressed with the structural component sizing of my new Pulsar 1.8m sailplane. The leading edge of the wing is a moulded carbon/kevlar D box. The 1/16 balsa ribs are carbon capped top and bottom and the wing Trailing edge is 1 x 3 mm. This produces a tremendously strong and stiff wing at a very low weight and is the current development in high performance lightweight R/C sailplanes
these techniques were developed in the Ukraine for free flight competition models.
John