ORIGINAL: rlipsett
one important note is to keep the antenna away from metal when you run it through the plane. especially metal pushrods. the push rods act as antennas for noise and metal around the antenna will shield it from radio signals. about at least an inch away is a good rule of thought.
Yes,for the most part you only have to run antenna outside if there is a proximity of the pushrods.If you use plastic ,flexible pushrods you should have any problems at all.
72 Mhz penetrates wood with no problem.And besides everything you have an 'eye sight ' with the plane.Thats all you need for good reception.Keep away from the metal.