If I put the antenna of my DSM2 RX into my foam fuselage( like put a small hole and then put the 2inch antenna in it), will it change the performance of my RX?

Foam, wood, and covering wont effect the receiver.

And will it make a difference if I extend the lenght of my antenna?

Why would you do that? The antenna is tuned to the frequency its operating on.

Not sure what you're trying to accomplish. I have DX recievers burried in 50cc gas planes and a giant electric helicopter with carbon frames, at the ranges we operate, unless you enclose it in carbon fiber or a lot of metal, you're not going to have any problems as long as you're using the proper reciever for the application.

okk thanks for you help.

cheers,

Max<br type="_moz" />