When two transmitters are sending signals to the same aircraft and it is PCM, the RX goes into lockout...the throttle went to low idle and the control surfaces stayed where they were when it had a valid signal. Here is the aftermath...45 degrees straight into hard dirt.

My 28% Extra 300LX had a carbon fiber spinner, carbon fiber wing tube, DA-50, carbon fiber stab tube, three Li-Ion batts and Duralite regulators, stock gear and wheel pants...weighed 15.5 pounds without fuel.

1. Construction on the original Extra 300LX was very strong and well built.
2. Glue joints were strong on the parts...wood broke and left the joints where glue was holding parts together.
3. The motor box was destroyed along with the whole front of the aircraft.
4. The wings ripped the sides of the fuselage out but the pins and bolts holding the wing on were in tact.
5. The tail section is very well built. The balsa glued over formers has no foam inside, just air...strong and light.
6. Using Gorilla glue made my hinges indestructable. I tried pulling them free and was completely unsuccessful. I even tried bending the control surfaces over past the bevels and wasn't even able to force the hinges out that way!
7. Over 100 flights and people still commented on how it looked "new."
8. Great plane - very strong and light weight!

If the other TX hadn't been turned on this plane would have been around for a long time to come!

See my full review at http://www.rcuniverse.com/forum/m_2773490/tm.htm for more info about my pleasureable experience with my first gasser...