Originally posted by Jim_McIntyre
This is an often, and hotly debated topic and associated with many myths.
Some simple facts
- HOLD is not fail-safe
- all PPM units will be twitching uncontrollably long before the interference level will cause a pcm unit to stop listening
I won't debate that you can fly aircraft without problems on ppm... the difference is what happens when a problem occurs.
When I lose that tenuous radio link, I want the power delivered to my blades to drop to minmum and the flightpath to be as predictable as possible, not surging around erratically . It's about safety , not saving a replaceable (although relatively expensive) piece of equipment.
PCM delivers on this requirement, PPM does not. It's a pretty simple choice to me.
Well Jim, I know we have crossed paths on this one, but now you do have a choice with PPM FM its called the IPD receivers from Multiplex. Fully failsafe programmable and faster response then PCM.
Don't forget, Multiplex invented PCM and they have since evolved with the IPD and have stopped making the PCM receivers completely.
Here is some explanation for the interested.
http://www.multiplexrc.com/ipd_info.htm