I built myself one of MikeysRC.com FPV V3 biplanes. I put a FlipHD on it and an iPhone 4S with an Otterbox case on it; this is a very heavy set up, in case you’re wondering. It uses a Turnigy 2830 1050kv motor with a 2200mah Turnigy lipo.
I highly recommend this plane to anyone flying FPV with a GoPro or a similar heavy camera and/or equipment on board. It took 3 sheets of Dollar Tree foam board, a wood dowel, a dozen glue sticks and some strapping tape. Flies very well and I love that the COG can be moved around easily. Check it out at MikeysRC.com