"Bill Daniels" bildan@comcast-dot-net wrote

For Dan's earlier question about performance at altitude, what I hear from
Bob is that it looks pretty good. His real concern was restarts at
altitude. He made a big improvement in that by switching from glo-plugs
to spark igniters. As I understand it, the micomputer engine controller
senses altitude and adjusts the engine to adapt.

I also hear that the life of the engine, and especially the bearings (the
most prone to need replaced first) have been much improved in many brands of
engines, and that the little engines run happily for many hours.

Some of the engines out there are getting pretty big, and with big thrust
values to go along with it.

I'm thinking that a pair of them would make self launching possible; if not
completely unassisted, with an auto towing down the runway to, say, 30 or 40
feet of altitude?

Then, if a cruise at the same altitude was needed to get home, or whatever,
one could be shut down.
--
Jim in NC