HDV
I'm using the Cannon HV10. Records onto DV cassette tapes which isn'nt as vulnerable to in flight vibrations as ones that record onto disc. The video in High Definition is awsome.
It also has a feature to record regular video onto the tape. This is a great feature as I have a Tail Cam which I feed into the HV10 in flight. That video isn't High Def, but it works great. The video from the Tail Cam is only as good as the output of that camera and is in 4x3 format rather than the 16x9 format of High Def Video.
Cannon has the newer version the HV20 out now. Some new features, but I'm not sure what they are.
Bought my HV10 FactoryRefurbished from Tiger Direct for $449.95 which is a little over half the price of buying from Best Buy,etc.
You can google Tiger Direct and look up their products.