Tim Olson
Joined: 25 Jan 2007
Posts: 2872
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 Posted: Sun Dec 11, 2011 10:58 am Post subject: New Electronic Ignition System |
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This was sent to me for posting by Brent Regan. He's developed
many things that have been top notch in quality, so I'm curious
to see how these things take off. I have no other info on them
personally, so take this as a press release, and contact BPA
with your questions...
Tim
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A while ago I was approached by Monty Barrett of BPA to develop and
ignition system for the 9 cylinder M14 radial engine. The magnetos for
these engines were out of production and unreliable. We applied our
experience designing certified aerospace electronics and came up with a
magneto replacement system with a Timing Controller that featured an
internal poly-phase alternator, manifold pressure sensor, independent
High-Q magnetic flux sensors and dual microprocessors with cascading
redundancy. Everything is packaged in a billet machined, O-ring sealed
MIL-Spec, water and dust proof anodized housing. The Timing Controller
is coupled to independent "Coil Near Plug" high energy Smart Coils that
deliver a measured 80+mJ of energy to the spark plasma. The entire
system is rated to 125 degrees C operating temperature (257 degF), 10G
sign-on-random vibration, direct and indirect lightning effects as well
as a host of other DO160F test requirements.
While we were designing this system it occurred to me that I would like
a couple of these on my IV-P, so we designed it so it could accommodate
6 or 9 cylinder engines. The only difference being the internal sensor
ratio and firmware.
The system components have passed qualification testing and the 9
cylinder system is currently on the BPA dynamometer undergoing
performance mapping and endurance testing. This is where we develop the
advance parameters for RPM and manifold pressure. It really isn't
practical to attempt to develop these advance curves without a dynamometer.
Monty at BPA is currently booking orders for the 9 cylinder M14 system.
The problem with the 6 cylinder "market" is that there are many
variables and each significant variant of manufacturer, induction system
and compression ratio needs to be dynomometer qualified. So, to solve
this problem Monty will be offering a significant discount on the
ignition system to select 6 cylinder customers who have BPA perform
their overhaul and consent to having Monty performance map their engine
after the post overhaul dyanamometer run-in.
The reason for the dyno testing is that it is not a good idea to just
make a guess at the correct timing based on RPM and manifold pressure
and then go fly. That would be like buying a suit out of a catalog. A
good outcome is unlikely.
The attached picture shows the Timing Controller. It replaces the
magneto and contains the poly phase alternator, electronics and manifold
pressure sensor. The MIL-Spec connector is the interface to the
individual coils. The red cap covers the -4 JIC threaded fitting for the
manifold pressure connection. Under the blue cap are the firmware update
connector and integral static timing light. There is NO separate "Brain
Box" to deal with.
The system is not available for 4 cylinder engines at this time.
If you are interested, contact BPA http://www.bpaengines.com
Regards
Brent Regan
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