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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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 Posted: Tue Oct 27, 2009 4:28 am Post subject: Fuel pickup security |
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While the tubing may soften or expand, if you secure it with a safety wire clamp it won't fall off. These fit down the 1/2" hole in the plastic tank without any problems. They become an inspection item for annuals and will have to be replaced periodically, but unless they are allowed to rot they'll be where they're supposed to be.
Rick Girard
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henry.voris
Joined: 02 Mar 2007
Posts: 116
Location: Pueo Field, Kula, Maui
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| Posted: Tue Oct 27, 2009 7:15 pm Post subject: Re: Fuel pickup security |
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27oct09
Rick,
Your photo looks a lot like the set up I had... (I like your pick-up better.)
It took a little over a year for my blue tubing to disintegrate into pieces of blue jello, leaving the pick-up rolling around the bottom of the tank.
Your point about regular inspection is well taken.
Aloha,
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Henry
Firefly Five-Charlie-Bravo
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NeilsenRM(at)comcast.net
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| Posted: Wed Oct 28, 2009 12:07 pm Post subject: Fuel pickup security |
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We have discussed this before but I keep hearing about forced landings with
top feed fuel systems and all the steps you guys are taking to keep them
safe. The original Kolb design was to feed fuel from the bottom of the
tanks. It works and is not prone to fuel stoppage so you don't have to go to
extreme measures to fix a potential safety issue created by top feeding. Yes
I heard someone say they had a fuel leak using the bushings in the bottom of
the tank. Maybe it was a installation issue?? I have never talked to anyone
that had a leak and my tanks have never leaked in the eight years they have
been in service. I did replace the tanks and bushings and fuel lines app.
four years ago. I use the black automotive fuel line for most of the system
and two short transparent blue lines to feed the carbs. I like to see fuel
flowing into the carbs using my boost pump during preflight. I purchase a
one foot section of transparent fuel line every other year and replace these
lines. I try to buy the best lines I can get and don't brake the bank with
my one foot purchase.
I also think there may be a issue of exposing fuel lines to fuel on the
inside and out when they are designed to only carry fuel inside.
My bottom feed fittings are standard LSA products with a shout off valves
and finger strainers. I drill the holes in the tanks with step drill bits
and very carefully deburr the hole.
We have to be very carful when we improve our airplanes that we don't create
new problems.
Again worth what you paid for it.
Rick Neilsen
Redrive VW powered MKIIIC
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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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| Posted: Wed Oct 28, 2009 12:57 pm Post subject: Fuel pickup security |
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Richard, In this case it was a TNK improvement. When I bought new tanks I bought new pickups too. When I pulled the old yellow tank that came in the plane the pickup bushing flange was slit all the way to the center and there were stains inside the fuselage that could have been fuel seepage or it could have been spill. When the top mount pickups came from TNK, I just went with it.
Rick
On Wed, Oct 28, 2009 at 3:05 PM, Richard & Martha Neilsen <NeilsenRM(at)comcast.net (NeilsenRM(at)comcast.net)> wrote:
[quote] --> Kolb-List message posted by: "Richard & Martha Neilsen" <NeilsenRM(at)comcast.net (NeilsenRM(at)comcast.net)>
We have discussed this before but I keep hearing about forced landings with
top feed fuel systems and all the steps you guys are taking to keep them
safe. The original Kolb design was to feed fuel from the bottom of the
tanks. It works and is not prone to fuel stoppage so you don't have to go to
extreme measures to fix a potential safety issue created by top feeding. Yes
I heard someone say they had a fuel leak using the bushings in the bottom of
the tank. Maybe it was a installation issue?? I have never talked to anyone
that had a leak and my tanks have never leaked in the eight years they have
been in service. I did replace the tanks and bushings and fuel lines app.
four years ago. I use the black automotive fuel line for most of the system
and two short transparent blue lines to feed the carbs. I like to see fuel
flowing into the carbs using my boost pump during preflight. I purchase a
one foot section of transparent fuel line every other year and replace these
lines. I try to buy the best lines I can get and don't brake the bank with
my one foot purchase.
I also think there may be a issue of exposing fuel lines to fuel on the
inside and out when they are designed to only carry fuel inside.
My bottom feed fittings are standard LSA products with a shout off valves
and finger strainers. I drill the holes in the tanks with step drill bits
and very carefully deburr the hole.
We have to be very carful when we improve our airplanes that we don't create
new problems.
Again worth what you paid for it.
Rick Neilsen
Redrive VW powered MKIIIC
---
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kolb-List |
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