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03-31-2007, 07:22 AM
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Join Date: Jan 2005
Posts: 98
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Quote:
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Originally Posted by collinsj57@adelphia.net
Warminster PA ?
Doug
Wheres Warminster PA. I am out of Gettysburg but have not run into alot of RVs around hear?
John
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Warminster is in Bucks County. If you interested in finding out about RV's in your area check out the Yahoo Group, Mid - Atlantic RV group. I have met up with a couple of RV'ers out of Carrol County MD.
Doug
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03-31-2007, 09:17 AM
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Join Date: Sep 2005
Posts: 57
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posted last year but relevant
The fuel pump on my RV6/0-360 has been flucuating quit a bit lately and generally trending downward, pressurewise. Flew yesterday and happened to glance at the pressure gauge and it was at 1 lb.! Turned the elec. fuel pump on and pressure came up right away.
Decided, that's it, time for a new fuel pump (this one is brand new with 50 hrs.) Removed the cowl and started removing hoses etc. from the pump. I have Van's primer set-up which runs a small copper line from a T fitting on suction side of pump to an on-off solonoid running to cylinder heads. In the process of removing the flared nut from this fitting, the flare/sleeve assembly fell on the hanger floor. Deciding this could have well been the problem, I reflared the copper line, reattached it to the fitting and also supported it closer to the fuel pump..went out and flew, and problem solved. Pressure back up to almost 5 lbs. all the time and steady......The scarey part though, is when I thought back to when I applied elec. fuel pump. Fuel had to be spraying down onto the exhaust.....not a good situation. I left the electrical pump on for the rest of the flight, thinking I would be safer. Thought "maybe" I could detect a faint smell of fuel but wasn't real sure, so just kept the pump on.....not a good situation.
Just a heads up on something to check when you have your cowl off next time. The line going into the pump looked completely normal and I guess the best way to check something like that would be to turn on elec. pump with the cowl off and look for leaks and/or manipulate the small copper tubing at the fittings. Fly Safe!
Dave Mader
RV6/50 hrs.
Have since switched to stainless with no problems!
__________________
Dave Mader
Sheridan, Wyo
RV6, flying
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04-01-2007, 08:28 AM
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Join Date: Feb 2005
Location: Huskerland, USA
Posts: 5,862
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Wow! Some people live right! My guess is your CO2 levels were pretty high too.
Opps! CO it is....
__________________
RV-7 : In the hangar
RV-10 : In the hangar
RV-12 : Built and sold
RV-44 : 4 place helicopter on order.
Last edited by Geico266 : 04-02-2007 at 06:35 AM.
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04-01-2007, 10:35 AM
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Banned
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Join Date: May 2006
Location: Phoenix, Az
Posts: 920
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Carbon Dioxide?
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04-01-2007, 08:40 PM
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Join Date: Oct 2006
Location: Garden City, Tx
Posts: 5,145
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CO - carbon MONoxide.
__________________
Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2020 dues paid 
N16GN flying 700 hrs and counting; IO360, SDS, WWRV200, Dynon HDX, 430W
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now.
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04-04-2010, 11:47 AM
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Join Date: Jul 2009
Location: Klamath Falls, OR
Posts: 31
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Catching up on old threads and found this. Want to chime in on personal experience and ask a question.
Years ago I left an airport in Alaska where my employer maintained their airplanes in a newly serviced Navajo. On climbout I noticed somewhat but not alarmingly low fuel-flow on the right engine, and radio'd back to discuss this with the maintenance dept. They assured me the numbers were within limits I elected to continue the flight (with pax on board and out into some very very remote country down the Chain). The flight was normal but I continued to fiddle with the mixture, and being new to the airplane was unsure of my assesment at the time. After landing I brought up the issue with our resident mechanic, who took a 20 second look at the airplane and spotted a problem. Without removing a single screw he spotted a thin area of blue dye at the louvers in the cowling. Opened it up and all the fuel injectors were loose, only finger tight, and fuel was leaking into the engine compartment on a TIO-540 with all the associated plumbing. Some heads rolled in maintenance and they never yelled at me again for asking a "dumb question."
So my question now is regarding the dye. I usually run Mo-Gas in the airplane I own now, and would like to stain the fuel in the interests of early leak detection. Does anyone here know of a safe dye to put in clear fuel that is safe to run in Lycomings?
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04-05-2010, 12:12 AM
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Join Date: Feb 2007
Location: Sutter Creek, CA
Posts: 842
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30 Sec
Quote:
Originally Posted by fodrv7
If you do install one and you have a fire; ensure you turn the fuel off and give the fire time to die down before dumping you precious extinguishent. 30 sec delay is the airline standard.
Pete.
Gee George. Never thought I would write more than you. Dunder Pete.
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I am only speaking for the procedures at my carrier, but we shoot the bottle immediately after shutting down the engine, closing the fuel, hyd, pneumatic shutoff valves, and opening the generator relay. Then we wait 30 sec to see if the fire goes out. If not, then we discharge the other bottle. If the fire is still not out, we will be landing shortly at the nearest piece of concrete, irrespective of our current weight!!
__________________
Mark Ohlau
RV-6 N506MM VAF #1410
2017 Donation Made
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04-05-2010, 08:33 AM
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Join Date: Jun 2006
Location: Ottawa, Ontario, Canada
Posts: 2,116
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Sobering indeed.
Once my airplane gets back from paint, I'm going to have anohter close look at all my FWF lines. Most of them are the firesleeved flex lines that came with my FWF kit from Vans. But I think I put a short copper piece from my gascolator... I will probably order up a small diameter braided SS line from Bonaco to replace this. All in-cabin fuel and brake lines, and brake lines down gear legs are already SS bonaco lines.
I use MIL-PRF-82282 brake fluid (much higher flash point than the stuff Vans sells).
I am also going to order up a nomex flight suit from flightsuits.com.
I'm also going to apply insulating material to my cowl where it is closest to the exhaust.
Regarding exhaust cracks, when they start to crack, is there a practical repair, or is that when it's time to pull them off and replace?
__________________
Phil
RV9A (SB)
Flying since July 2010!
Ottawa, Canada
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04-05-2010, 10:01 AM
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Join Date: Jul 2009
Location: Klamath Falls, OR
Posts: 31
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This forum motivated me to recheck the condition of my lines.
When I purchased my airplane only 1 line was firesleeved. I replaced a couple of rough looking lines, and firesleeved everything else that I thought was important. I thought it was prefect, but builders here always seem to do it better, and after checking last night I see that my fuel pressure sending unit line is bare as is my primer line, which is hard copper with only a loop for pressure relief between engine and firewall. Time to buy some more firesleeve and clamps for the fuel pressure supply line.
On primer lines, is a braided line the best choice for something of such small diameter? I've never used firesleeve that small either, but it looks like Bonaco carries 1/4" size, but Spruce only carries it to 1/2".
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04-05-2010, 10:21 AM
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Join Date: Jun 2005
Posts: 3,275
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Bandit, some believe that primer lines are not needed. Consider trying starting your engine by starting the prop turning (engage starter), then a quick throttle pump. Sometimes takes two attempts separated by several seconds.
Last edited by Ron Lee : 08-21-2010 at 09:16 PM.
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