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Hi Ed, has a crank trigger been discussed in the past? If so is anyone pursuing it? Do you know what the EC-2 needs to see, I assume that the EC-2 needs to see 3 pulses spaced 120 degrees apart on the crank, I am guessing that Tracy fires both rotors at the same time for simplicity as one would be starting the power cycle while the other was ending the exhaust cycle.

I agree that the electronic components in the crank angle sensor are unlikely to fail, in my experience the problem is usually a failed connector or bad harness usually resulting from poor routing, past repairs in the vicinity, or old age causing the connectors to become brittle. -- Ian

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Ed Anderson
Sent: Friday, May 06, 2005 1:09 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Emailing: Possies & CAS 007, Possies & CAS 008, Possies & CAS 009

Very Interesting approach, Georges.

Simpler than trying to adapt the twin distributor 12A front mount. However, with both on the same shaft not certain you have true redundancy - in my opinion the shaft is more likely to fail than the simply electrical circuit used to sense the rotation. For true redundancy, I would think you would want to put a flywheel/pulley angle sensor - probably flywheel end where a flopping belt wouldn't tear it out.

Ed

----- Original Message -----

From: Echo Lake Fishing Resort (Georges Boucher)

To: Rotary motors in aircraft

Sent: Friday, May 06, 2005 12:23 PM

Subject: [FlyRotary] Emailing: Possies & CAS 007, Possies & CAS 008, Possies & CAS 009

Group

I gave up on the 12a front cover to have igniter redundancy.The first photo is the semi completed unit (need to install upper shaft). Second is the adaptor & 3rd (out of focus)is the upper shaft with the center drilled out for the mounting bolt. The shaft has a ball bearing for support at the top (great support) the bearing retainer is left out as the upper shaft locates the bearing . A star washer between the two shaft will lock the two together.(note: machining accuracy is very important)

The amount of space required shouldn't be a problem on any installation

Georges B.

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