I've got three people now who have TUTs installed in airplanes for engine sequencing.  They're our own Fred Cronenwett, and two RC guys who read his scale column.

Fred and one of the new guys are having no problems, and just love the system.  The other guy is having no end of trouble.

I think it might be related to the ESC he's using -- by default, I have the idle threshold on the TUT set fairly low, and I think that his motors are getting told to start at idle, but aren't.

He's using SkyPower 20amp ESCs with 4amp switching BEC.  If there's anyone out there that has one or more of those, and has a way of knowing what pulse width is getting sent to it (either because you have a servo testing box, or because you've got an RC transmitter that'll let you know pulse widths), could you check and see at what throttle setting the thing starts the motor turning?

It would be a great help to me, my new customer, and possibly lots of customers down the road.

For that matter, if you don't have a Skypower ESC, but you have the other stuff and want to help out with this, measure the "starts to turn" pulse width and post it here -- then I can build up a table of brands and settings so that people know out of the box how to set things up.

Thanks in advance...

Hey Keith:

That could certainly be the problem.  I've sent an email to the customer, I'll see what he says back.