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AFP Booster Pump and Filter on Firewall

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dpharker(at)worldnet.att.
Guest

Posted: Wed May 24, 2006 5:20 am Post subject: AFP Booster Pump and Filter on Firewall

Working on my 7A fuselage and have the AFP BP/Filter installed per plans.

Seems like too much plumbing inside the cockpit to me.  Thinking of placing

the pump and filter on the front of the firewall.  Anybody done this or have

a suggested location?  Thanks



Don Harker

Gurnee IL

7A fuselage

gerf(at)gerf.com
Guest

Posted: Wed May 24, 2006 6:18 am Post subject: AFP Booster Pump and Filter on Firewall

All the instructions I've seen from AFP say DON'T put it on the 

hot side of the firewall.  I think heat is the major issue.  If 

you do put it on the firewall side you will need to install a 

shield around it and cool it with a blast tube.



g



 	  Quote: 	
		   

 

 <dpharker(at)worldnet.att.net>

 

 

 Working on my 7A fuselage and have the AFP BP/Filter installed 

 per plans.

 Seems like too much plumbing inside the cockpit to me.  

 Thinking of placing

 the pump and filter on the front of the firewall.  Anybody done 

 this or have

 a suggested location?  Thanks

 

 Don Harker

 Gurnee IL

 7A fuselage

 

 

 

 

 

 

 

 

 

  

  

  

 

 

 

 


	


-- 

__g__



========================================================== 

Gerry Filby                                  gerf(at)gerf.com

                   Tel: 415 203 9177

----------------------------------------------------------

dbris200(at)sbcglobal.net
Guest

Posted: Wed May 24, 2006 6:26 am Post subject: AFP Booster Pump and Filter on Firewall

Mine is in the lower right corner of the firewall. I put a cover over 

the top of it and installed a blast tube just in case. It fit very 

nicely behind the landing gear (-6). I've never had a problem with it 

and it's easy to service the filter.



Dave



Donald Harker wrote:



 	  Quote: 	
		  

Working on my 7A fuselage and have the AFP BP/Filter installed per plans.

Seems like too much plumbing inside the cockpit to me.  Thinking of placing

the pump and filter on the front of the firewall.  Anybody done this or have

a suggested location?  Thanks



Don Harker

Gurnee IL

7A fuselage

don.wentz(at)intel.com
Guest

Posted: Wed May 24, 2006 7:00 am Post subject: AFP Booster Pump and Filter on Firewall

I initially had my AFP boost pump and filter forward of the firewall and

had nothing but problems with hot fuel.



After the -7 came out with the pump and filter location near the fuel

selector, I moved mine there and it has worked much better, no more

dead-stick landings due to hot fuel.  Kind of a nice thing .



A carefully constructed sealed box with plenty of cool air should work,

assuming you're able to fit it in without restricting access to other

areas under the cowl.

Dw

RV-6 925hrs 



--

recapen(at)earthlink.net
Guest

Posted: Wed May 24, 2006 7:32 am Post subject: AFP Booster Pump and Filter on Firewall

I ordered the -7 boost pump/filter mount for my -6A - I like the way it finishes up.....much better than finding a place myself......



Ralph



--

shempdowling2(at)earthlin
Guest

Posted: Wed May 24, 2006 8:16 am Post subject: AFP Booster Pump and Filter on Firewall

I modified my 6 to put this where the plans state and it really is no 

problem.



Shemp/Jeff Dowling

RV-6A, N915JD

265 hours

Chicago/Louisville

---

RVer273sb(at)aol.com
Guest

Posted: Wed May 24, 2006 10:12 am Post subject: AFP Booster Pump and Filter on Firewall

I have my AFP fuel pump on the front of the   firewall

on my RV-4. 6 years and 1450 hrs later I have  not

had a single problem. The filter is in the  tunnel.

Pump is mounted to a plate that is adel clamped 

to the engine mount lower tubes. I have a 1in  scat

tube to it for cooling.

Stewart, RV-4

Erich_Weaver(at)URSCorp.c
Guest

Posted: Wed May 24, 2006 1:40 pm Post subject: AFP Booster Pump and Filter on Firewall

I can relate to the desire to avoid all the plumbing.  Rather than do all

the aluminum tube bending, I used  various AN fittings (Earls Performance

or similar) for the AFP pump (on the cool side of the firewall) to make the

turns  along with an appropriate flexible hose.  Ok, the cost of the

fittings did add up.  It was easy to put together after that though, and I

avoided prolonged bouts of cussing that I am prone to.

Something to consider anyway



Erich Weaver

klwerner(at)comcast.net
Guest

Posted: Wed May 24, 2006 2:02 pm Post subject: AFP Booster Pump and Filter on Firewall

You cuss too ???



Do not archive

  ---

Terry Watson

Joined: 09 Jan 2006
Posts: 290
Location: Seattle, WA USA

Posted: Wed May 24, 2006 3:35 pm Post subject: AFP Booster Pump and Filter on Firewall

About using AN fittings in the fuel system, I ran across this note in the

Airflow Performance installation manual:

Apendix A, page A-20, Rev. A. photo:



"Care must be taken to avoid the use of 90 degree fittings on the suction

side of the fuel pump on high horse power applications. The more correct way

would be to use a straight bulkhead fitting and a full flow 90 degree hose

end to eliminate flow pressure drop."



A retired mechanical engineer friend told me that way back when he was in

school, his hydraulics instructor told him that three elbows is equal to a

plug. It was meant to be tongue-in-cheek, but the idea was that elbows

reduce flow in a way that bent tubing does not. Of course it will all depend

on tubing size, horsepower, and a few other considerations, but this is why

I went through a lot of tubing to get the bends right for the fuel valve and

boost pump. I also used a wing root mounted Andair gascolator with my AFP

system, which probably wasn't a good idea in hindsight. I did talk to AFP

about it and he thought it was a wasted effort, but acceptable.

 

Terry

RV-8A #80729

Baffles finished!


I can relate to the desire to avoid all the plumbing.  Rather than do all

the aluminum tube bending, I used  various AN fittings (Earls Performance

or similar) for the AFP pump (on the cool side of the firewall) to make the

turns  along with an appropriate flexible hose.  Ok, the cost of the

fittings did add up.  It was easy to put together after that though, and I

avoided prolonged bouts of cussing that I am prone to.

Something to consider anyway



Erich Weaver

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