Large scale carbon fibre?

[Eagleburger]

I dont have the time to build as I once had and have found that size doesnt change the time required to scratch up a plane a lot. I have a considerable wad of carbon fibre and carbon/kevlar mat.Can you see where I am going?

I know they build gliders and racers out of carbon and dont have many problems.

I have drawn up plans for the plug and will eventually build one out of glass at least.

Can anyone envisage or know of problems that a 145" bird made out of carbon can present?

[RMaia]

Now, this is going to be interesting!!!

Sorry I can't offer any advice as composite building is a technique which I'm pretty much ignorant yet. Stilll got gobs to learn about it....

[sensei]

	Quote: Originally Posted by Eagleburger
	I dont have the time to build as I once had and have found that size doesnt change the time required to scratch up a plane a lot. I have a considerable wad of carbon fibre and carbon/kevlar mat.Can you see where I am going? I know they build gliders and racers out of carbon and dont have many problems. I have drawn up plans for the plug and will eventually build one out of glass at least. Can anyone envisage or know of problems that a 145" bird made out of carbon can present?

This type of construction will work out very well for you, In regards to carbon, if you are going to run your system on 72mz with the antenna outside the airframe; (Good) but if you are going to run 2.4 inside the airframe you could run into problems keeping your bind.

Bob

[RMaia]

Yeah, I also heard about that. Seems like 2.4GHz signals have a hard time going through carbon fiber structures...

[Pappy]

ANY electromagnetic wave will have trouble penetrating any type of conductive material (carbon). For either system you'll have to have external antennas that are postioned to ensure line-of sight in any aircraft orientation.

[Judge]

Take a look at this:

http://www.compositesworld.com/hpc/issues/2004/July/511

36 foot (11 meters) wing with an empty weight of 155 pounds. Brain McLean work/worked there (not sure if he still does). He was well known in the RC slope soaring world for making some of the faster racers around.

[RappyMan]

Carbon fibre Sukhoi..


This is cool too!

[Eagleburger]

Thanks for the links guys, I should know better about the search function.

I am planning an electric setup, which will add to the radio woes. A SHV setup with 10,000+watts. That way I should easily be able to cut airframe weight in half.