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10-22-2019, 03:25 AM
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Join Date: Feb 2007
Location: Mpumalanga, South Africa
Posts: 1,065
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Andair Boost Pump
On my next annual, I plan to replace the old VANS stock fuel pump and filter with the Andair unit on my IO540. This is for ease of access and servicing.
I have already purchased the PX375 since my fuel lines are 3/8" noting that it says it is suitable for the IO540. However, looking at the spec sheet, it says that it is "designed" for the IO360 series and that the output is 16gph @ 27-30psi. Hmmmm ......
Using the 125% rule, I require 26gph. Looking at the spec further, it states the open flow is 55-60gph @ 5psi. Interpolation gives me a fuel flow of something just over 30gph at the minimum pressure of 14psi. Further, at the actual max fuel flow of 21gph, I should get about 18psi.
I have asked the question of Andair but got no reply. Is the PX375 suitable or should I have got the PX500 and used adaptors to fit the pipes?
__________________
Paul
Mercy Air, White River FAWV
RV-10 ZU-IIZ - "Zeus"
Building Bearhawk Bravo - RV-18 not available 
2019 Donation Made
Last edited by paul330 : 10-22-2019 at 03:27 AM.
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10-22-2019, 04:19 AM
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Join Date: May 2013
Location: Sherman, CT
Posts: 790
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My PX375 provides approx.36 psi to my IO-360 using the 3/8" fuel lines. My fuel flow test provided 32gph.
__________________
Jake
RV6 #20477 completed 1991 sold.
RV7 #72018 N767T first flight 11/21/2017 350+ hrs.
IO-360M1B MT 3 blade, Dual AFS 5600 QUICK Panel.
Manual Flaps. (KOXC)Oxford, CT, (0NY0)North Creek, NY.
1941 J3 Cub skis,floats.
2020 dues gladly paid.
Last edited by Jpm757 : 10-22-2019 at 04:22 AM.
Reason: Add
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10-22-2019, 05:44 AM
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Join Date: Feb 2007
Location: Mpumalanga, South Africa
Posts: 1,065
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Quote:
Originally Posted by Jpm757
My PX375 provides approx.36 psi to my IO-360 using the 3/8" fuel lines. My fuel flow test provided 32gph.
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What was your pressure @ 32gph? Surely not 36psi .....
__________________
Paul
Mercy Air, White River FAWV
RV-10 ZU-IIZ - "Zeus"
Building Bearhawk Bravo - RV-18 not available
2019 Donation Made
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10-22-2019, 09:12 AM
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Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,583
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you probably have the olde version AFP pump with the external bypass and all the additional plumbing. Why not change to the new version ( well not quite so new) that eliminates all the external bypass tubes? You already have the tunnel set up for this.
Tom
__________________
Tom Swearengen, TS Flightlines LLC, AS Flightlines
Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC
www.tsflightlines.com, www.asflightlines.com
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10-22-2019, 09:58 AM
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Join Date: Feb 2011
Location: Colorado Springs CO
Posts: 30
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Note from Andair
Relaying a response from Andair in May.
On May 29, 2019, at 07:45, Owen Phillips <Owen@andair.co.uk> wrote:
Hi Greg,
They are all the same pumps, we just set the pressure relief valve slightly higher on the 500 series. You can just wind the pressure relief screw in a little bit to get more flow at a higher pressure.
Owen
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10-23-2019, 01:53 AM
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Join Date: Feb 2007
Location: Mpumalanga, South Africa
Posts: 1,065
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Quote:
Originally Posted by Greg Baron
Relaying a response from Andair in May.
On May 29, 2019, at 07:45, Owen Phillips <Owen@andair.co.uk> wrote:
Hi Greg,
They are all the same pumps, we just set the pressure relief valve slightly higher on the 500 series. You can just wind the pressure relief screw in a little bit to get more flow at a higher pressure.
Owen
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Excellent! Just have to find the pressure relief screw .....
__________________
Paul
Mercy Air, White River FAWV
RV-10 ZU-IIZ - "Zeus"
Building Bearhawk Bravo - RV-18 not available
2019 Donation Made
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10-23-2019, 01:54 AM
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Join Date: Feb 2007
Location: Mpumalanga, South Africa
Posts: 1,065
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Quote:
Originally Posted by TS Flightlines
you probably have the olde version AFP pump with the external bypass and all the additional plumbing. Why not change to the new version ( well not quite so new) that eliminates all the external bypass tubes? You already have the tunnel set up for this.
Tom
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Except I have already bought the new pump and filter @ $800+ ......
__________________
Paul
Mercy Air, White River FAWV
RV-10 ZU-IIZ - "Zeus"
Building Bearhawk Bravo - RV-18 not available
2019 Donation Made
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10-23-2019, 02:16 AM
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Join Date: Aug 2013
Location: UK
Posts: 160
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Quote:
Originally Posted by paul330
On my next annual, I plan to replace the old VANS stock fuel pump and filter with the Andair unit on my IO540. This is for ease of access and servicing.
I have already purchased the PX375 since my fuel lines are 3/8" noting that it says it is suitable for the IO540. However, looking at the spec sheet, it says that it is "designed" for the IO360 series and that the output is 16gph @ 27-30psi. Hmmmm ......
Using the 125% rule, I require 26gph. Looking at the spec further, it states the open flow is 55-60gph @ 5psi. Interpolation gives me a fuel flow of something just over 30gph at the minimum pressure of 14psi. Further, at the actual max fuel flow of 21gph, I should get about 18psi.
I have asked the question of Andair but got no reply. Is the PX375 suitable or should I have got the PX500 and used adaptors to fit the pipes?
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Quick thought - U.S. or Imperial gallons (I'd suspect Andair numbers may be in the latter ?)
__________________
NOTHING is Foolproof .... To a sufficiently Talented Fool
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10-23-2019, 08:10 AM
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Join Date: Feb 2007
Location: Mpumalanga, South Africa
Posts: 1,065
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Quote:
Originally Posted by Pittsartist
Quick thought - U.S. or Imperial gallons (I'd suspect Andair numbers may be in the latter ?)
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Possibly, but I doubt it. Even in UK, aircraft fuel is normally quoted in litres or usg ......
__________________
Paul
Mercy Air, White River FAWV
RV-10 ZU-IIZ - "Zeus"
Building Bearhawk Bravo - RV-18 not available
2019 Donation Made
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10-26-2019, 04:57 AM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,514
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Quote:
Originally Posted by paul330
Except I have already bought the new pump and filter @ $800+ ......
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Well, if you bought a new one already you are going to use it if even if it does not work, right?
Just be sure to test it after installation. Install a line after the pump with a restrictor and pressure gauge. restrict to minimum full power pressure and read the flow in the cockpit. Research done on that pump 5 yrs ago indicated it would not meet the 125% spec, at full TO (max) flow and minimum pressure. Maybe they are different now.
Regardless of whether it works or not, just report here, so people can learn from an installed unit. It may work. And there is nothing better than real, installed data.
__________________
Bill
RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
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