Hello Paul and every body
     We have a trouble on our Midwest AE100R motor: This motor is under test
     to be mounted on a modified Lynx aircraft!
     For an undisclosed reason???? but I suppose may be a reverse connexion
     of the battery, the 2 ignition devices are out! each one shows more
than
     10 Amp from the 13Volt battery supply.
     We are looking if it is possible to repair, but we have not the
     schematic drawing of this device. It is the  R2 BO 11A (or  R2 B011A  )
     157-96
     Also, on the printed circuit board, there is some coating of black
     stuff   (like silicone) and it is impossible to check  the components.
     May be somebody knows this device and is able to send us the drawings;
     If not, does anybody knows other type and suppliers for replacement
     kit.
     Thank very much
     Daniel

     It is pretty easy to devise a new ignition system.

     You might have to cut a new trigger plate and mount it on
     the e-shaft. It should look like this. Just about any MSD
     ignition system should work with this. Slot the mounting holes
     so you can adjust the fixed spark timing to about 20 degrees BTDC.

     The trigger plate can be cut out of 1/4 inch thick mild steel
     with a computer controlled plasma or laser cutter.

     This will also work on PicAXE EFI systems.

     Contact Diamond aircraft for replacement parts as they are
     the new owners of Midwest.
     http://www.diamond-air.at/
     Diamond Aircraft Industries
     N. A. Otto-Straße 5
     A-2700 Wiener Neustadt
     Tel: +43 2622 26700
     Fax: +43 2622 26780
     officediamond-air.at <http://officediamond-air.at>

     Diamond Chris Dries <c.dries@diamond-air.at
     <mailto:c.dries@diamond-air.at>>

     Paul Lamar ...No rotor no motor.


Thank you for your quick answer.
But my question was not about the triggering of the ignition! The 2 main
ignition system box are out of use: the supply line shows more than
10Ampères, on each box! So one or several electronic componnet are in
short circuit with the common! and to try to repair we need a schematic
diagram of the system to test the components.
Also, I don't undertand why we must replace the trigger plate?? before
the problem, the triggers works very well,and it is not sure that it is
out of use!

I know that it could be possible to use a Mazda ignition device, but may
be there are other suppliers,with special design for aircraft.
  Also, Midwest in Austria have very few spare parts.

Daniel

It is not practical to fix it if it is potted which it appears to be.
That means you will need to replace it. If the current triggers
are working you might be able to trigger an MSD box with them.
--
Paul Lamar ...No rotor no motor.

Paul
It is not completely potted; only a black coating!
We can see the component, but rather difficult to identify.
Sorry, what is the meaning of MSD: Magnetic Solenoïd  Device, or else?
I don't know if the trigger is working, since the main box don't
work!, and We have not dismounted all the system from the aircraft;
just the 2 box.
As far as you know, is it possible to get the schematic drawing.
If it is not possible to repair, have you any advice for replacement
devices? with the same trigger and trigger plate if possible
Thanks  Daniel

MSD is a company that makes ignition modules.
http://www.msdignition.com/

I don't know where to get a schematic unless Diamond can send you one.
If you can't get a schematic I don't think you will be successful
in fixing it. Obviously one or more semi-conductors have failed someplace.

Send me some good pictures of the trigger wheel and trigger plate
and I will be able to tell if it is possible to use it with
the MSD.