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Firewall fuel shut-off (was: glide ratios)

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brian

Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA

Posted: Thu Apr 06, 2006 12:24 pm Post subject: Firewall fuel shut-off (was: glide ratios)

A. Dennis Savarese wrote:

 	  Quote: 	
		   

 <dsavarese(at)elmore.rr.com>

 

 Brian,

 On the 52 the emergency air is on the opposite side of the cockpit.  Not

 chance of messing up there.

 

 A great way to check and see if the fire control/fuel shutoff is

 functioning properly without running the engine is to pull the fire

 control/fuel shut off back, then turn the primer pump to the left

 (system side) and attempt to pressurize the fuel system.  After a few

 strokes, if the fuel shut off is properly adjusted, it will be virtually

 impossible to push the primer pump in.  Now move the fuel shut off

 forward and pump the primer pump at the same time you are doing this. 

 The primer pump should now pump normally immediately.  If after pulling

 the fuel shut off closed and you begin to pump the primer to the system

 side and it never feels any different than usual, your fuel shut off arm

 and cable are improperly adjusted.


	


With the firewall fuel shut-off closed you can't pump fuel to the carb.

Makes sense to me.



Brian

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_________________
Brian Lloyd
brian-yak at lloyd dot com
+1.916.367.2131 (voice) +1.270.912.0788 (fax)

I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery

dsavarese(at)elmore.rr.co
Guest

Posted: Thu Apr 06, 2006 1:42 pm Post subject: Firewall fuel shut-off (was: glide ratios)

But if it won't shut off with the fire control handle at the rear position, 

in an emergency you won't be able shut the fuel off to the carb either. 

That's why it's a great little test that's easily done.

Dennis



---

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dave(at)davelaird.com
Guest

Posted: Thu Apr 06, 2006 2:28 pm Post subject: Firewall fuel shut-off (was: glide ratios)

 	  Quote: 	
		  >

> Brian,

> On the 52 the emergency air is on the opposite side of the  

> cockpit.  Not

> chance of messing up there.


	




It's the same on the CJ, Brain said  "alternate air", not "emergency  

air".

It's the carb heat air, or alternate air, lever that in the CJ is  

right next to the fuel cutoff lever...

I was under the impression that yak 50's and Sukhoi's don't have carb  

heat/alternate air control....I'm not sure about -52's.



comments?

Dave Laird

N63536  1983 CJ6A  "Betty"

Dallas

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brian

Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA

Posted: Thu Apr 06, 2006 2:34 pm Post subject: Firewall fuel shut-off (was: glide ratios)

A. Dennis Savarese wrote:

 	  Quote: 	
		   

 <dsavarese(at)elmore.rr.com>

 

 But if it won't shut off with the fire control handle at the rear 

 position, in an emergency you won't be able shut the fuel off to the 

 carb either. That's why it's a great little test that's easily done.

 Dennis


	


Oh, I understand why you might want to ensure that it not only turns on 

but also shuts off. I bet hardly anyone has tested this on their airplane.



-- 

Brian Lloyd                         361 Catterline Way

brian-yak at lloyd dot com          Folsom, CA 95630

+1.916.367.2131 (voice)             +1.270.912.0788 (fax)



I fly because it releases my mind from the tyranny of petty things . . .

- Antoine de Saint-Exupery

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rogerbyak(at)yahoo.com
Guest

Posted: Thu Apr 06, 2006 6:37 pm Post subject: Firewall fuel shut-off (was: glide ratios)

The previous posts got me to questioning.....why do we shut down the CJ engine with the mag switch while we shut down Cessnas with the fuel shut off?  



Brian Lloyd <brian-yak(at)lloyd.com> wrote:  [quote]--> Yak-List message posted by: Brian Lloyd 



A. Dennis Savarese wrote:

 	  Quote: 	
		   --> Yak-List message posted by: "A. Dennis Savarese" 

 

 

 But if it won't shut off with the fire control handle at the rear 

 position, in an emergency you won't be able shut the fuel off to the 

 carb either. That's why it's a great little test that's easily done.

 Dennis


	


Oh, I understand why you might want to ensure that it not only turns on 

but also shuts off. I bet hardly anyone has tested this on their airplane.



-- 

Brian Lloyd 361 Catterline 		Yahoo! Messenger with Voice. [url=http://us.rd.yahoo.com/mail_us/taglines/postman1/*http://us.rd.yahoo.com/evt=39663/*http://voice.yahoo.com]Make PC-to-Phone Calls[/url] to the US (and 30+ countries) for 2¢/min or less.

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JOE HOWSE

Joined: 10 Jan 2006
Posts: 140
Location: DUNCAN BC CANADA

Posted: Thu Apr 06, 2006 7:08 pm Post subject: Firewall fuel shut-off (was: glide ratios)

We do not shut down the Cessna by shutting off the  fuel,

 We stop, the engine with the mixture control idle  cut-off.

  

 Joe

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J.C. HOWSE

viperdoc(at)mindspring.co
Guest

Posted: Thu Apr 06, 2006 7:22 pm Post subject: Firewall fuel shut-off (was: glide ratios)

It can be shut down with the fuel cutoff lever. The problem comes when you get ready to light her off for the next flight. You cavitated the fuel pump and it relies to some extent on the fuel passing by the impreller to lubricate it along with probably cooling it to Also your start time is prolonged by the amount of priming you have to do to get enought fuel back into the system to light it off. You will find you are pumping that primer for a while too.

 Doc

  

 



  

 [quote] ---

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brian

Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA

Posted: Thu Apr 06, 2006 7:22 pm Post subject: Firewall fuel shut-off (was: glide ratios)

Roger Bieberdorf wrote:

 	  Quote: 	
		   The previous posts got me to questioning.....why do we shut down the CJ 

 engine with the mag switch while we shut down Cessnas with the fuel shut 

 off? 


	


We don't shut off the spam cans with the fuel shut-off. We shut them off 

with the idle cut-off feature of the mixture control.



But shutting off the engine with the firewall fuel shut off should be 

pretty quick. I am not sure how good it is for the fuel pump to be 

sucking hard against that valve. The fuel in the line should vaporize 

with the low pressure but will the fuel line collapse? I am not sure it 

is all that good for the fuel system.



-- 

Brian Lloyd                         361 Catterline Way

brian-yak at lloyd dot com          Folsom, CA 95630

+1.916.367.2131 (voice)             +1.270.912.0788 (fax)



I fly because it releases my mind from the tyranny of petty things . . .

- Antoine de Saint-Exupery

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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