tank into the mix, would they?
Bob.
On 12/9/2011 10:03 AM, Walter Klatt wrote:
I am not familiar with 185 fuel systems (or many others). But as I
understand it, if you have a fuel pump, engine or electric going, it is the
opposite of gravity feed systems with how you select your tanks on low fuel.
IE, when on low fuel, you want to use only the tank with the most fuel. If
you have the empty one open, too, it can suck air from it instead of fuel
from the good one, and you could end up with a lot of air in your fuel
system.
I thought that certified systems usually don't have a Both in those
situations for that reason, just a Left and Right, and you need to manage
your tanks separately. At least that is how it was in the Cherokee 140 that
I used to fly, a long time ago.
Walter
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of Bob
Palmer
Sent: Friday, December 09, 2011 9:28 AM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] Header Tank
Walter,
I once had a particularly long flight in moderate turbulence in a Cessna
185. To make a long story short I had the engine quit twenty miles back at
about twelve hundred feet. Fortunately, the engine was restored at about
seven hundred feet. I also heard rumors that air in the lines was strongly
implicated in the crash of another C185.
However, that is not recreational flying because nobody has any fun in
moderate turbulence and nobody has any fun down close to the last thirty
minutes of fuel either. Hope we all just have fun!
Bob.
On 12/9/2011 7:25 AM, Walter Klatt wrote:lock.Just want to mention, too, that this discussion only applies to
gravity feed fuel systems with no engine or electric pump. A pump will
suck through the air. Although you can still have other issues like vaportransfer pump.Walter
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Walter Klatt
Sent: Friday, December 09, 2011 6:22 AM
To: rebel-builders@dcsol.com
Subject: RE: [rebel-builders] Header Tank
Yes, a larger fuel line would help with eliminating bubbles. I just
don't want to blow this issue out of proportion, though. It is
important to understand what can happen, but it is not something that
I am concerned about. You just need to know how to properly operate
your aircraft and fuel systems under all circumstances.
Walter
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Ben Ransom
Sent: Thursday, December 08, 2011 9:56 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] Header Tank
Bringing in Walter's advice not to over-complicate, the simpler
version of your idea Ray might be to just be in the habit of always
using up left tank first. (no transfer pump)
This wouldn't prevent trapped air problems from pilot error inFrom the discussion I've wondered about using larger diameter fuel line.
changing tanks. But it might prevent the air bubble problem ...and
heck, that way I could consider my fuel lines a small header tank!
-Ben
On 12/5/11 11:59 AM, "ray"<raybot@comcast.net> wrote:
I,m thinking about dual tanks and gravity feed alot lately and
although my system has worked fine with one very notable exception I
do not like starting to worry about fuel stavation while still having
usable fuel in both tanks. I have the glass sight gauges mounted at
an angle but they are tee,d into the supply line.I want to throw out
my idea for discussion. I ,m thinking of using the passenger side
tank as a main tank and the pilot side as a aux tank with an electric----------------------------------------------------------------------------------------------------------------------------------This is to transfer all usable fuel to one tank. My thinking is this
deepens the fuel, reducing sloshing and is easier to monitor. If I
did a header tank I am thinking of some
1.5
inch diameter aluminum tubing.thickwall with a conical cap with vent
at top.
This would mount vertical in the cabin as high and as long as
practical and be securely mounted and possibly even enclosed in some
reinforced hose for crash/leak protection. This would allow for some
unporting and frothy fuel to settle out. This is slightly more fuel
in the cabin with me but is still a gravity feed system. The aux tank
could still fuction as a main tank by opening the valve. My strategy
right now is maximum fuel at all times and I will fix the tee,d
situation as my next priority. I also am running the four blade warp
in front of a 290 and I like it but have nothing to compare it
to,it pulls hard on takeoff ant top speed is about 110 mph Ray
----- Original Message -----
From:<paul.lennemann@dcsol.com>
To:<rebel-builders@dcsol.com>
Sent: Sunday, December 04, 2011 9:34 PM
Subject: Re: [rebel-builders] Header Tank
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