Mailing List flyrotary@lancaironline.net Message #63108
From: Bobby J. Hughes <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: Rotary DFI/EFI & Ign Options
Date: Wed, 15 Feb 2017 15:44:07 -0600
To: Rotary motors in aircraft <flyrotary@lancaironline.net>

Ernest,

 

Would this configuration be a single controller for fuel and coils?

 

Bobby

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Wednesday, February 15, 2017 4:41 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Rotary DFI/EFI & Ign Options

 

Wired up a Fueltech ECU or the Megasquirt?

 

I have, in fact, had a well running aircraft rotary engine with a MegaSquirt, and may again in the not to distant future.

 

Bobby, for a secondary CAS, wire up a Ford EDIS-4 ignition controller to the trailing plugs.  You don't even have to provide it with a control input.  It's limp-home mode is 10 degrees of advance. Set the CAS to have 15 degrees, and your set.

 

On Wednesday, February 15, 2017 4:24 PM, Neil Unger <flyrotary@lancaironline.net> wrote:

 

Gents,  There is no doubt as I continually say that tracy's gear and
indeed tracy was 20 years ahead of his time.  Being computer illiterate
I rely on others to present something like an ECU in a ready to go
format.  For that reason I have invested in the Fueltech ECU, but yet to
wire in.  IS there any on this forum that has already done this? Neil.


On 2/16/2017 8:14 AM, Bobby J. Hughes wrote:
> I did a little MegaSquirt 3 research after Tracy's post. Charlie's been telling me for years he though the Megasquirt would be a good solution. It looks very usable for our application. The current firmware and feature set supports 4 rotor, 3 rotor, older 2 rotor and Renesis engines. For the Renesis using the stock trigger wheel, a secondary CAS for a second ECU can be positioned up to 20 degrees offset from the stock location. This is a current firmware limitation. Using a rotary compatible MegaSquirt wheel, each CAS position is fully programmable. They don't support an overall "Fuel Map Trim" feature using an external potentiometer. However they have a "Fuel Table Blending" feature that should accomplish the same thing. The MS3 supports two independent Fuel Tables and you can use an external potentiometer to adjust a bending of the tables. A balance would need to be achieved  allowing either controller to provide full rich fuel as well as lean cruise. My range would be 12.5:1 to 15.8:1. May be doable.
>
> Bobby
> (love my EC3 but would like a second CAS)
>
>
>
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
> Sent: Wednesday, February 15, 2017 3:21 PM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Rotary DFI/EFI & Ign Options
>
> Bill, Tracy and others,
>
> I should have added that I spoke with Ross about using his system on the rotary just last week so, I suspect his comment was accurate...unless he was juiced up on his morning coffee as I like to be!  I also suspect Tracy is making a very good point with the MegaSquirt system.  Challenging maybe, difficult sure, yet in no way impossible.  I worked in combustion at GM for over a decade and am an instrumentation specialist from my graduate school days in physical science so I have a few points of confidence to draw from.  Open source software has become a huge advantage to the RC users so, I suspect the same will be true with MegaSquirt despite that aviation is likely to represent a small segment for their audience.
>
> Rick
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:  http://mail.lancaironline.net:81/lists/flyrotary/List.html
>    
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:  http://mail.lancaironline.net:81/lists/flyrotary/List.html



--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:  http://mail.lancaironline.net:81/lists/flyrotary/List.html

Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster