OK.
Here are the way I was check the range. First only the battery pack and one servo connected in the receiver. Program this servo to a different position when entering fail safe mode. Turn on the radio and the antenna fully extended. The radio was place about 2 meters high. And free area between the TX and RX.
I was holding the Receiver, whip antenna and the servo in my hand. And was start walking (The was a lot of walking this weekend)
And I reach about 400-500 Meters (1160 feet) And still have a good signal I put the whip antenna on the ground nothing happened. I take the whip itself out of the connector, then and only then I got the fail safe. To me this look to be a good radio gear.
And so to the next test. The turbine , “ECU” and the ECU battery still in the airframe. Out side we have the receiver battery, the receiver and the wipe antenna. And the only connection is the throttle cable from the “ECU”. Make a start up, spool up the turbine got the green lamp flashing that show the full rpm. Is OK. Throttle back to idle. Take out the antenna on the TX. And start walking. The air frame are in a wood stand. After ca 180-200 meters (590-656 feet). Fail safe and the turbine shut down. Before this we was doing several testing with every thing in the airframe and every thing connected. With the turbine running I always get to the same spot 590-650 Feet and it shut down. After is shut down everything else working fine again. And this was the same thing I feel when I got this thing happened in the air, Fail safe no responding on the stick, after the shut down the control got back.
And look at the facts that I was using to different radio gear, also a different whip. I cannot see the problem are coming from here. Every battery pack is check out.
The only thing that have been the same all the way is the turbine and the “ECU”.
We also making a test with another jet with the same equipment in it. Let the turbine running on idle, take the TX and start walking the way I know very well after 1600 Feet we still not have any problem, I have to turn the TX off to get the airframe to get in fail safe. And the airframe was on the exact same spot as mine use to stand. This was a long story, but I think its been explain how we have performed this test.