flyrotary@lancaironline.net Mailing List Archive

Ed,

1) Have you ever had an injector failure that required this?

2) There were a number of occasions during initial debug when it was helpful to disable injector pairs. It was easy enough to do this by pulling power where they were plugged into the essential bus. Not as convenient as flipping a switch, but I don’t anticipate having to mess with it ever again.

3) Are your supply lines to your injectors fused? If not, why not? If they do short in flight how do you know to turn off the switches?

4) I turn off the fuel pump to kill the engine. I suppose this does leave a possibility of a little fuel in the chamber? Not sure there is any reason for concern?

Mike Wills

From: Ed Anderson

Sent: Tuesday, March 16, 2010 6:30 AM

To: Rotary motors in aircraft

Subject: [FlyRotary] Injector Select Switch [FlyRotary] Re: Civil Discourse was : [FlyRotary] Re: Ut-Oh...

I also find the “Injector Select” switches useful for several purposes, Rino.

1. If a problem with one injector of a pair occurs, I can turn that pair off and fly home on the remaining pair.

2. They are great for trouble shooting injector problems by permitting you to choose which pair will be on without question.

3. In the highly unlikely (but possible) event that a power wire to a pair should short to ground, you can turn the power off to that pair.

4. I also use them to turn off the engine – that ensures no residue fuel in the housings.

But, if not wired correctly they can cause a new installation some puzzling problems {:>) and they do add another component and we know components can fail – although if sized properly for the correct current and installing quality switches and wire correct the failure in one will not take you down and the likelihood of both failing at the same time is rather remote.

But, once again, you can certainly fly without them – I just find them very useful.

My 0.02

Ed Anderson

Rv-6A N494BW Rotary Powered

Matthews, NC

eanderson@carolina.rr.com

http://www.andersonee.com

http://www.dmack.net/mazda/index.html

http://www.flyrotary.com/

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.rotaryaviation.com/Rotorhead%20Truth.htm

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Rino
Sent: Tuesday, March 16, 2010 8:05 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Civil Discourse was : [FlyRotary] Re: Ut-Oh...

I find the "injector failure Switches" convenient during the warmup to test the operation of the injectors just like the primary and seconday plugs test.

Rino Lacombe

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

From: Mike Wills

To: Rotary motors in aircraft

Sent: Tuesday, March 16, 2010 1:23 AM

Subject: [FlyRotary] Re: Civil Discourse was : [FlyRotary] Re: Ut-Oh...

I chose not to implement the "injector failure switches". I don’t know if there are any statistics on it, but I suspect injector failure is an extremely rare occurrence. On the other hand if one did fail I'd rather fly the plane and troubleshoot the problem after I'm on the ground. But that’s part of the advantage in going the Experimental route - build it the way you want it.

Mike Wills

From: Bktrub@aol.com

Sent: Monday, March 15, 2010 8:47 AM

To: Rotary motors in aircraft

Subject: [FlyRotary] Re: Civil Discourse was : [FlyRotary] Re: Ut-Oh...

In the event of a primary or secondary injector failure, the affected injector set can be switched off and the cold start switch used to richen up the remaining injectors. This as per Tracy's instructions. I haven't tried this, and hope I never have to in the heat of battle, but there it is.

Brian Trubee

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