Will,

Ross doesn't generally list Rotary engines in his catalog, but he isn't against them. He has a injection that still lists rotary engines. To run his ignition only you would likely need to get an aluminum e-shaft pulley to install his magnets. He has his own Hall effect sensors. He used to sell both ignition units and full EMS systems. Don't know if he is still doing it individually. The advantage of his system is that he does do aircraft stuff. His business has in fact gravitated towards aircraft since so many cars now come with their own systems unless it is a full custom build they often don't need an EMS. BTW I don't work for them or get anything for recommending their products. I met Ross at Reno while crewing for a friend on a Sport Class entry. Ross was providing an EMS for a very fast Questair Venture running a turbo Lyc. Very good guy. A 4 cylinder unit with dual plug coils will run the rotary just fine. The timing is the same, except that the coil isn't wasting a spark in the exhaust, instead it is firing both plugs on a single rotor.  Ross' site still lists his "coil pack ignition" for vehicles with mechanical injection or carburetors.

Bill

On Tue, Jan 23, 2018 at 12:24 PM, william Aldridge willja67@hotmail.com <flyrotary@lancaironline.net> wrote:

Looked over his site this morning and if i read It right there was only a fuel injection controller/ system,  no ignition control. Out was here: http://www.sdsefi.com/prices.html

If I'm reading that chart at the top of the page right he doesn't supply ignition systems for the rotary. 

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-------- Original message --------

From: "William Jepson wrjjrs@gmail.com" <flyrotary@lancaironline.net>

Date: 1/23/18 12:14 PM (GMT-07:00)

To: Rotary motors in aircraft <flyrotary@lancaironline.net>

Subject: [FlyRotary] Re: Simple bullet proof Ignition systems?

Guys, I don't know if he is still offering it but SDSEFI (Simple Digital Systems, www.SDSEFI.com) has both an ignition only system and a full engine management system that will work for a 13B. His system doesn't have split firing, but most people running a high performance rotary do both plugs at once anyway. He has a newer dual in one box system, FOR AIRCRAFT that could be run simultaneously to do a split fire and be fully redundant.

Bill Jepson 

 

On Tue, Jan 23, 2018 at 6:08 AM, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:

Maybe someone out there has a RWS original ignition controller they want to let go of. No programming required, uses 13-B standard pickup and ignition coils. Of course you'll have to use carburetor(s).

I have one, but really don't want to let go if it. Its simplicity is nice if just want to get 13-B running. (All you have to do is set timing and tune carburetors.)

Finn

On 1/22/2018 11:31 PM, william Aldridge willja67@hotmail.com wrote:

 I'm building a one off experimental, therefore, i need a simple bullet proof Ignition system and am wondering what is currently available?  I have the 2007 version of Tracy's conversion manual in which he gives the option of either using the stock distributor etc, or use a computerized ignition system with stock or Chevy ls coils. 

To reiterate, since the airframe is unproven i only want to be worried about flying the plane not the engine. It's a small plane the size that would normally have 100hp installed (1200 lbs gross) so if I only have 150 hp I'll still be doing good. In other words I'm willing to sacrifice a little power for a lot of reliability and simplicity. 

I don't like the idea of the stock distributor, since there isn't much room in the cowl and there's no redundancy. I also don't like the idea of electronic ignition. I've read enough stories of lengthy battles to get the computers to play nice with the engine and don't want to go that route. Again simplicity and reliability at the expense of power and fuel efficiency is what I'm after. Also planning on using a carb for the same reason. I can always upgrade the engine later if i want. 

I figure there has to have been some other options come up in the last 10 years. I used to subscribe to the other guys list, but don't know if any of the ideas he put forth have merit. 

Thanks, 

Will Aldridge 

Ps my build thread on hba here: http://www.homebuiltairplanes.com/forums/showthread.php?t=16831

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