Hi Glenn,
Sorry if I am "teaching my grandmother to suck eggs", I know it's almost
impossible
to communicate on these forums your entire troubleshooting history and
everything
that you have done up to now in a concise few sentences.
One of your statements that jumps off the page at me, is that you have no issues
on ground tests, I assume from the way you've written it, that means before
the flight - is that correct? And then after the flight has completed, the issue
remains - again, is that the correct understanding?
Do you have the Arplast standard VP controller installed?, or a CS controller
(CSC-1
etc.)? If you have the Arplast controller, have you changed the batteries
(sorry, obvious question :? )
If you have changed the batteries (or you have a CS controller installed), then
I would recommend putting a new 9V battery directly across the motor power
terminals.
You can do this with just the spinner removed. This will directly test
the motor itself. If the motor is supplying enough torque with the power
attached
directly to it, then it implies the wiring could be at fault.
If it points to wiring then, from what you've written I would want to eliminate
thermal effects. I suggest taking voltage measurements at the PV50 motor while
the engine is cold and then again when the engine is hot. From what you said,
it sounds like the problem is reproducible, so you should be able to collect
some good fault finding data.
If you do need a replacement motor, I know that Kevin Kenward was trying to
establish
a "support network" for the Arplast PV50, following the company's demise.
You may have to check directly with him, but if I recall correctly the motors
are "Commercial-of-the-shelf" from a company in Germany.
Best
Jon
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