Have you got a link to the airspeed sensor specs? What kind of output/interface does it have?
I have a code on gyro and accelerometer, but would like to ask if it is possibble to send them through RF modules? ( of course with digital type of modulation )
Yes, you can get [u]transmitter/receiver modules[/u] for the Arduino. (I've never used one and I don't know what kind of distance you can get.) You don't have to program the "modulation". They are designed for digital data.
and about a live camera streaming, can I send them too. using RF modules and arduino.
No. The Arduino isn't fast-enough for real-time video. If you can find a video transmitter/receiver the Arduino might be able to control it, if it needs any "control".