See the altitude difference between start and landing. Don't trust GPS altitude to much.

GPS receiver. Note the large backup battery. The receiver is the small metal box under the battery. The square thing on a wire is the active antenna.

Thats where it just fits.

Linx LR tx and amp 3.3V regulator and inverting transistor to accept raw RS232 TX signal

The 17cm groundplane antenna. In the schrinktube te Linx LR and Max232 Powered by one Lipo Cell it lasts for hours.

The first results

The first results are in. I just managed to get some online GPS data back to earth.

I build an 70cm (433Mhz) transmitter and receiver and put it all into my Sioux glider. Some successful 12 flights where logged using the donwlink.

For the downlink i used The LINX LR transmitter and reciever. (i will post some more photo's later.

Now i know the GPS and downlink works some autonomouse flight can be programmed.

The testplane.

GPS data logged using my home build GPS and transmitter.