Here is another view... Not many people here have any experence of running out of range
with their planes... I have a RC car with a TV camera that I drive all over the hood and run out
of range all the time... In PCM mode if just holds and I run into a tree.. In PPM mode it slowly
gets gittery and I loose some % of control.. Sometimes I loose %20 somtimes I loose %80...
But I am still able to drive the car. IPD acts just like PPM but goes much further down the street...

In my Isobar with an old AMT I run PPM and if the ECU does not get good frames for some
time (not sure) the ECU shuts off the Engine... This has happen to me
years ago where I taxied over 100m down the runway and the engine quit... It EDT
said Switch failer witch means it ran out of range...
If I turn the transmitter off while the engine is running the engine quits very quickly...

Just because PCM has less errors and is the newest thing does not mean its better for
flying jets.. I would rather see 5 bumps or hits than one lockout.. There is nothing wrong
with a plane going crazy in the air because at least you know its the radio and you can still
kill the engine because it only takes a few good frames getting through..

With PPM I get bumps far more often than PCM but at least I know about it and either
land or go home.. I am not saying PPM is better... Its just what I perfer

Eddie Weeks