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fuel pump 701

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frank goodnight

Joined: 27 Dec 2011
Posts: 126

Posted: Sun Jan 20, 2013 7:14 am Post subject: fuel pump 701

[img]cid:1358694409322(at)dclient.mail.yahoo.com[/img] Hi  ,

My question is-- Do most of you fly with the aux electric

fuel pump running all the time , or turn it off after takeoff?

  So far I have left mine on all the time. 

Frank Goodnight 

701 912ULS about 2 hrs.

Fayetteville , AR

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dougsnash

Joined: 14 Apr 2008
Posts: 281

Posted: Sun Jan 20, 2013 7:25 am Post subject: fuel pump 701

What aux fuel pump?  I did fuel flow test on my 701 and found an aux pump was unnecessary.  Standard practice would be to only use the aux pump when high angle of attack flight is anticipated, ie:during takeoff and possibly during landing.

Doug M

CH-701 from scratch

NW Ontario, Canada



Sent from my iPad



On 2013-01-20, at 9:13 AM, frank goodnight <frank.goodnight(at)att.net (frank.goodnight(at)att.net)> wrote:



[quote]<--static--liam_heartbubbles_bottomleft.jpg> Hi  ,

My question is-- Do most of you fly with the aux electric

fuel pump running all the time , or turn it off after takeoff?

  So far I have left mine on all the time. 

Frank Goodnight 

701 912ULS about 2 hrs.

Fayetteville , AR



   

  



[b]

frank goodnight

Joined: 27 Dec 2011
Posts: 126

Posted: Sun Jan 20, 2013 7:57 am Post subject: fuel pump 701

Hi Doug,

I mounted a faucet electric fuel pump just forward of the fuel control on the cabin 

floor. My thoughts were that it might help if I got into a vapor lock situation when

hot and high with auto fuel. My other planes have used this sys , with a pluse type

engine pump that is operated off changes in induction pressure. I'm new to the 912

and the 701 so everything is a learning experience for me. Thanks for your thoughts 

and intrest.

Frank 



From: Doug MacDonald  <dougsnash(at)yahoo.com>

To: "zenith701801-list(at)matronics.com" <zenith701801-list(at)matronics.com>

Sent: Sun, January 20, 2013 9:25:22 AM

Subject: Re: fuel pump 701



 What aux fuel pump?  I did fuel flow test on my 701 and found an aux pump was unnecessary.  Standard practice would be to only use the aux pump when high angle of attack flight is anticipated, ie:during takeoff and possibly during landing.

Doug M

CH-701 from scratch

NW Ontario, Canada



Sent from my iPad



On 2013-01-20, at 9:13 AM, frank goodnight <frank.goodnight(at)att.net (frank.goodnight(at)att.net)> wrote:



 	  Quote: 	
		  <--static--liam_heartbubbles_bottomleft.jpg> Hi  ,

My question is-- Do most of you fly with the aux electric

fuel pump running all the time , or turn it off after takeoff?

  So far I have left mine on all the time. 

Frank Goodnight 

701 912ULS about 2 hrs.

Fayetteville , AR



   

  





	


   

 [quote][b]

klondike(at)megalink.net
Guest

Posted: Sun Jan 20, 2013 8:14 am Post subject: fuel pump 701

not good

---

dougsnash

Joined: 14 Apr 2008
Posts: 281

Posted: Sun Jan 20, 2013 8:56 am Post subject: fuel pump 701

Fritz, do you mean the absence of an auxiliary fuel pump on my plane is not good?

 <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

 Here in Canada a fuel flow test is mandatory before first flight. I'm traveling for work right now so I don't have the documentation with me but if I recall, at a climb angle of 17 degrees, I had two times the full power fuel requirement of my engine available at the carbs using strictly gravity flow. Much above 17 degrees and the fuel tanks get too close to the same level as the engine fuel pump to provide adequate gravity flow. Fortunately, 17 degrees is more than adequate for a safe climb. Given these numbers, I am satisfied flying without an auxiliary fuel pump.

  

 Ultimately, however, we all must decide just how much redundancy we need in our planes.  Each to their own, I suppose.

  

 Doug M

  

    

From: fritz <klondike(at)megalink.net>

To: zenith701801-list(at)matronics.com 

Sent: Sunday, January 20, 2013 10:14:13 AM

Subject: Re: Zenith701801-List: fuel pump 701

--> Zenith701801-List message posted by: "fritz" <klondike(at)megalink.net (klondike(at)megalink.net)>



not good

---

klondike(at)megalink.net
Guest

Posted: Sun Jan 20, 2013 9:32 am Post subject: fuel pump 701

Yes Doug, I was referring to the "redundancy".  Take-offs" being the most 

critical part of flight-- in my opinion only.  I also agree with Frank that 

it lessens the chance of a vapor lock.    Your numbers prove you to be 

correct.



I was thinking 601, low wing, when I made my post.



Happy flying--- Fritz

---

Dan Wilde

Joined: 05 Jun 2011
Posts: 34

Posted: Sun Jan 20, 2013 9:33 am Post subject: fuel pump 701

 I also         have no aux fuel pump.  Have not had for over 5 years and 250 hours.  The plane was built             to Zenith standards which at the time at least did not show             a need for it.  Fuel flow has never been an               issue even when hanging it on the prop at full throttle               (granted that is only done for a short                 period since it makes me nervous.

                   

                   Dan Wilde

                       [quote][b]

klondike(at)megalink.net
Guest

Posted: Sun Jan 20, 2013 9:42 am Post subject: fuel pump 701

My 701 was a long time ago when the plans called for the fuel tank behind 

the instrument panel =  less gravity fuel press therefore I had engine 

driven pump with an electric, aux pump.



Happy Flying--- Fritz

---

dougsnash

Joined: 14 Apr 2008
Posts: 281

Posted: Sun Jan 20, 2013 9:53 am Post subject: fuel pump 701

Ah, yes, the 601 would definitely require a boost pump.



Honestly, I purchased a Facet boost pump for my plane but decided it was more complication for the fuel system than I was comfortable with.  Once I had the flow numbers figured out, I figured the boost pump was unnecessary.



Doug M

CH-701

NW Ontario, Canada

 



Sent from my iPad



On 2013-01-20, at 11:32 AM, "fritz" <klondike(at)megalink.net> wrote:



[quote] 

 

 Yes Doug, I was referring to the "redundancy".  Take-offs" being the most critical part of flight-- in my opinion only.  I also agree with Frank that it lessens the chance of a vapor lock.    Your numbers prove you to be correct.

 

 I was thinking 601, low wing, when I made my post.

 

 Happy flying--- Fritz

 

 

 ---

NYTerminat(at)aol.com
Guest

Posted: Sun Jan 20, 2013 12:08 pm Post subject: fuel pump 701

Frank, In answer to your question, I only used my electric fuel pump for  take offs and landings as a backup in critical times.

  

 Bob Spudis

 N701Zx/ 912S/ sold

  

  In a message dated 1/20/2013 10:14:54 A.M. Eastern Standard Time,  frank.goodnight(at)att.net writes:

  	  Quote: 	
		  



                                                                                                                                                                                                                                      Hi ,

                     My question is-- Do most of you fly with the aux                      electric

                     fuel pump running all the time , or turn it off after                      takeoff?

                     



                       So far I have left mine on all the                      time. 

                     



                     Frank Goodnight 

                     701 912ULS about 2 hrs.

                     Fayetteville , AR

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rpf(at)wi.rr.com
Guest

Posted: Mon Jan 21, 2013 9:45 am Post subject: fuel pump 701

I have a 601xl with a Jab 3300 and only use the fuel pump before starting(turn it on for a few seconds, turn it off and start the plane).  I have 740 hours on my plane.  

   

Randy  

       

From: owner-zenith701801-list-server(at)matronics.com [mailto:owner-zenith701801-list-server(at)matronics.com] On Behalf Of Dan Wilde

 Sent: Sunday, January 20, 2013 11:33 AM

 To: zenith701801-list(at)matronics.com

 Subject: Re: fuel pump 701  

  

  

   

I also have no aux fuel pump.  Have not had for over 5 years and 250 hours.  The plane was built to Zenith standards which at the time at least did not show a need for it.  Fuel flow has never been an issue even when hanging it on the prop at full throttle (granted that is only done for a short period since it makes me nervous.

 

 Dan Wilde   	  Quote: 	
		    	
[/b]http://forums.matronics.com         - List Contribution Web generous nbsp;                        -Matt Dralle, List href="http://www.matronics.com/contribution">http://www.matronics.com/c=[/b] [b]

klondike(at)megalink.net
Guest

Posted: Mon Jan 21, 2013 9:56 am Post subject: fuel pump 701

some folks have more hours than this on their aircraft before bad habits 

catch up to them---- good luck.

---

rpf(at)wi.rr.com
Guest

Posted: Mon Jan 21, 2013 11:00 am Post subject: fuel pump 701

That's what's nice about living in America, so far,  we can still do what we

want.  You do want you want and I'll do what I want.  I also believe the

owner of Jabiru USA does it this way.  Don't consider it a "bad habit" at

all.    



--

grumman1(at)hotmail.com
Guest

Posted: Mon Jan 21, 2013 11:40 am Post subject: fuel pump 701

I fly a grumman aa1, Use elect. pump only for take off, landing and switching tanks, and when landing I shut it down before touchdown just in case of problem on roll out, this is a normal procudure for me, 

Mike J.



[quote] From: rpf@wi.rr.com

 To: zenith701801-list@matronics.com

 Subject: RE: Zenith701801-List: fuel pump 701

 Date: Mon, 21 Jan 2013 13:00:31 -0600

 

 --> Zenith701801-List message posted by: "Randy" <rpf@wi.rr.com>

 

 That's what's nice about living in America, so far,  we can still do what we

 want.  You do want you want and I'll do what I want.  I also believe the

 owner of Jabiru USA does it this way.  Don't consider it a "bad habit" at

 all.    

 

 --

klondike(at)megalink.net
Guest

Posted: Mon Jan 21, 2013 12:17 pm Post subject: fuel pump 701

I salute you,  this is similar to the way I was taught.

---

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