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01-03-2017, 10:52 PM
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Join Date: Jun 2012
Location: Frederick, MD
Posts: 819
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Here is a link to an interesting video on fuel pump operation.
https://youtu.be/PYKoLUsTJU4
Discusses basic operation with great graphics.
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Dan Morris
Frederick, MD
PA28-140
Hph 304CZ
RV6 built and sold
N199EC RV6A flying
Learn the facts. "Democracy dies in darkness"
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01-04-2017, 08:49 AM
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Join Date: Jan 2005
Location: Broomfield, CO
Posts: 639
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Outstanding video!! Thanks for posting it Dan!
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RV-7 Flying since 2004
1,100 hrs+
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01-04-2017, 09:19 AM
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Join Date: Jan 2005
Location: Charlottesville, Virginia
Posts: 1,227
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Link
Yes, Thanks for the video link as well.
Most interesting part was the end.
Pump will make TBO or 10yrs whichever comes first.
also I did not exactly understand how the drain actually worked!
Seems I should put a new pump on the Preventive Maintenance To Do list.
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Bob Martin
RV-6, 0-360 Hartzell C/S, Tip up, 1200+TT
James extended cowl/plenum, induction, -8VS and Rudder. TSFlightline hoses. Oregon Aero leather seats.
D100-KMD150-660-TT ADI2- AS air/oil seperator. Vetterman exhaust with turndown tips.
Louisa, Virginia KLKU N94TB
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01-04-2017, 10:13 AM
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Join Date: Sep 2014
Location: silverdale, WA
Posts: 208
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Mechanical Fuel Pump
I was told, somewhere, that the same Lyc fuel pump we use here is the same part number that is used in South America. Some places (Brazil?) run alcohol, up to 100 %, without problems.
This is second hand information, and I cannot verify this to be true.
I do not have a mechanical fuel pump, so the resistance of the fuel pump to alcohol is not a factor in my build.
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01-04-2017, 11:02 AM
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Join Date: Dec 2006
Location: Oakland CA
Posts: 771
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Great video...THANK YOU!
Fulfilling the "education" component of "education and recreation". 
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All Best
Jeremy Constant
RV7A "Stella Luna" ECI IO-360 WW200RV Pmags 360hrs
VAF 2019 paid plus some for those who can't
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01-04-2017, 11:53 AM
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Join Date: May 2006
Location: Pocahontas MS
Posts: 3,884
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Quote:
Originally Posted by longline
I was told, somewhere, that the same Lyc fuel pump we use here is the same part number that is used in South America. Some places (Brazil?) run alcohol, up to 100 %, without problems.
This is second hand information, and I cannot verify this to be true.
I do not have a mechanical fuel pump, so the resistance of the fuel pump to alcohol is not a factor in my build.
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Note that this is a pretty old thread.
I've talked with a tech person at M/S on a couple of occasions (several years ago) about this and related issues. He told me that the old 'soft' stuff in the pumps had problems with ethanol, but that while they were not marketing the pumps as E-gas safe, current production used soft parts that had no issues with automotive gas, including E-gas. He hinted that they could no longer even get the old materials in the soft parts. My take (not what he actually said, but my take) was that these pumps really are automotive/industrial designs that are re-purposed for aviation. If M/S is buying components from automotive/industrial suppliers, it makes sense to me that any new production would be E-gas safe, since any auto/industrial use in the USA will almost certainly see E-gas.
FWIW,
Charlie
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01-04-2017, 11:57 AM
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Join Date: Nov 2008
Location: Shreveport, LA
Posts: 1,002
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Quote:
Originally Posted by RVDan
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That was good. Thanks for posting that link. |
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