It definately does help if you try to keep the whole length of Aeriel cable that came with the Rx, but in robots, especially featherweights, this isnt really very practicle. If you just try to keep the cable as long as will fit you should still be fine.

Try this part of Paul Hills Website:
http://homepages.which.net/~paul.hills/Radio/Radio.htmlhttp://homepages.which.net/~paul.hills/Radio/Radio.html
(god knows what Id do without this mans website!)

Also... are you the guy who created that famous 3 wheeler weve all heard of?