Well that is a can of worms, are you doing brushed or brushless motors?
Also having 4 means 4x as much things to go wrong. Normally you only need one to get the thing in the air.
What are you planning? Lead Ballon?
To the op, if you are going to use LiPo batteries make sure you know how to handle them.
They can go up in flames if damaged or incorrectley charged. There have been a few reports of people driving home after a days flying and the batteries have set on fire in the boot.
Do some reading before you use them.
Check out the vid in the link.
www.hyperflight.co.uk/products.asp?code=LS1
can anyone describe how elevons are set up. how do they acheive both. Or point me in the right direction.
Watch my video above those are Elevons, or flaperons. You will need a TX that can channel mix (hence £120 for the FF7). It negates the need for airlons and elevator as the 2 surfaces act as both of these.
In the video I tied 2 sets together for extremer manouverability.
Cool, so is there any cheaper ones that could do it, something like this?
http://www.micronradiocontrol.co.uk/spektrum.html
it does say delta wing mixing.
Although I have got some old stuff somewhere. But never heard of mixing before and it's 15 years old, so i doubt it can do it.
So do you have one servo for each elevons and then the TX mixes the channels to get the required results?