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.