u2fast-

I partially misunderstood your original question....

I dunno, but from what I've heard over the years- and ocassionally seen myself- we do have gliches (momentary loss of signal link) for a variety of reasons, with almost immediate re-acquisition. So, the idea of delaying a FS link-loss engine shutdown is, of course, to keep the engine running through these glitches; and w/ PCM you might never notice them if surfaces are not preprogrammed other than 'hold'. Seems obvious: If you don't have a significant loss of control, why have your engine off?! We gotta have FS shut-down in '05, and with JR, e.g., there is no Tx delay/hold, so you'd have an instant engine shut-down w/ even a momentary link-loss. Futaba, you get a second's grace because of the Tx hold; maybe ride over that glitch. Only way to get more- up to the two seconds allowed- is by adding an ECU delay.

The two seconds is arbitrary- perhaps it should be three or even one second- it's really a philosophical question. But the intention/effect is to have the flame out within a reasonable period w/ a sustained link loss that would cause a crash; engine off prevents runaways and fires.

Bottom line: I'd want the full two seconds, figuring the plane likely will not be crashing before then, but almost certainly will after some longer period of continuous loss. Depends on your viewpoint...maybe w/ Futaba some won't bother to go to the trouble of updating the AMT ECU. Almost a personal thing.

Ray Davis
AMTUSA Field Rep