Interesting, never thought of the possibility.  I have not noted an issue with fuel boiling despite a very high temp heat source from the turbo.   There is usually a few psi of pressure left in the system, and I have never seen it climb back up (due to boiling).  Perhaps that few psi is enough to prevent loss to vapor.

 

Dave Leonard

 

On 6/24/07, Ben Baltrusaitis <ben@pa.metrocast.net> wrote:

Won't shutting down with the fuel pump tend to boil the remaining fuel in the lines because it is at a lower pressure and subjected to high heat sink?  Couldn't that lead to gummed up injectors from the residue left?

Ben

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

From: Ed Anderson

To: Rotary motors in aircraft

Sent: 06/24/2007 12:27 PM

Subject: [FlyRotary] Favored Method 7/8 - Fuel Pump Shut off was [FlyRotary] Re: Method of killing power??

 

 

 

Ok, heard from a couple more, the count now is  out of 8 respondents (including yours truly), it looks like the methods of engine shut down

 are:

 

7 - turn off fuel pumps

1- Disable injectors

 

And the "Winnnaahhh" is Fuel-Pump shut off!

 

Well, being "Plugs Up" has already endured me to being a part of a minority, so I can accept it the rest of you choose to be different {:>). 

 

Since flooding in my configuration ("Plugs Up")  is something of little consequence (but, leaking injectors have bugged me in the past) - I will stick with what has worked for me. 

 

Thanks for participating in our little informal survey

 

Ed

 

en·dure (n-dr , -dyr)

v. en·dured, en·dur·ing, en·dures

v.tr.

1. To carry on through, despite hardships; undergo: endure an Arctic winter.

2. To bear with tolerance: "We seek the truth, and will endure the consequences" Charles Seymour. See  v.intr.

1. To continue in existence; last: buildings that have endured for centuries.

2. To suffer patiently without yielding.

 ----- Original Message -----

From: James Maher

To: Rotary motors in aircraft

Sent: Sunday, June 24, 2007 10:35 AM

Subject: [FlyRotary] Re: Method of killing power??

 

Ed,

I prefer the Fuel Pump shutoff method.

On my airplane the fuel system will remain pressurized for a long time after shut down.

I don't like the idea of highly pressurized fuel inside a very hot engine compartment.

So by turning off the fuel pumps with the engine still running it serves to de-pressurize the fuel system.

This way if you do happen to get a stuck open injector it will not flood the rotor housing with fuel.

It only takes a second or two for the engine to quit after fuel pump shutoff.

Jim

Ed Anderson <eanderson@carolina.rr.com> wrote:

To everyone running a rotary engine and particularly flying with one - what is your normal method of killing the engine.

 

1.  Turning off Main Power

2.  Turning off EC2 Power

3.  Turning off ignition

4.  Turning off Fuel Pumps

5.  Turning off injectors

6.  Other

Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
http://members.cox.net/rogersda/rotary/configs.htm#N494BW
http://www.dmack.net/mazda/index.html

---

No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.472 / Virus Database: 269.9.6/865 - Release Date: 6/24/2007 8:33 AM