I have read here that there are 2 objections to fuel in the wings:
1.- That the fuel will hurt the bonding of the wings
2.- That it will give a higher roll inertia
Am I missing some other point ?
I guess that the second objection is a minor objection, but the first one
surely is critical
What about having someone manufacture a bladder tank and install it inside
the wing ?
Not practical ? Too costly ?
Bladder fuel tanks
-
blaswichk
Re: Bladder fuel tanks
Jaime,
I have long dreamed of wing tanks in the Gull 2000 to free up some more cockpit space. Retrofitting would be a real drag, as the skins are bonded as well as rivited. If I was to build my new 150mph dream wing, I would work with Mark to get tanks in the wing. One of the Titan guys did have bladder tanks made, and another made some out of fiberglass. One big problem is that there is a lot of stuff in the way, ribs, cross supports, aileron and flap linkage, which makes for several small tanks all interconnected. I don't think roll inertia would be an issue if the tanks were as far inboard as possible, anymore than a Cessna or high wing Piper or Taylorcraft. The proper way would be to design a clear area close inboard, which would take a lot of head scratching. So for now I just enjoy what I have.
kb
I have long dreamed of wing tanks in the Gull 2000 to free up some more cockpit space. Retrofitting would be a real drag, as the skins are bonded as well as rivited. If I was to build my new 150mph dream wing, I would work with Mark to get tanks in the wing. One of the Titan guys did have bladder tanks made, and another made some out of fiberglass. One big problem is that there is a lot of stuff in the way, ribs, cross supports, aileron and flap linkage, which makes for several small tanks all interconnected. I don't think roll inertia would be an issue if the tanks were as far inboard as possible, anymore than a Cessna or high wing Piper or Taylorcraft. The proper way would be to design a clear area close inboard, which would take a lot of head scratching. So for now I just enjoy what I have.
kb
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earthstaraircraft
Re: Bladder fuel tanks
In a message dated 2/4/2011 5:53:28 AM Pacific Standard Time,
jaime.g.sada@gmail.com writes:
I have read here that there are 2 objections to fuel in the wings:
1.- That the fuel will hurt the bonding of the wings
2.- That it will give a higher roll inertia
Am I missing some other point ?
I guess that the second objection is a minor objection, but the first one
surely is critical
What about having someone manufacture a bladder tank and install it inside
the wing ?
Not practical ? Too costly ?
Hi Guys.
I don't like fuel in the wing because of the for mentioned reasons plus
balder tanks are heavy and the fuel vent system is problematic and there is a
far amount of un usable fuel. I would rather use a more efficient engine
like the HKS.
Happy Flying
Mark
jaime.g.sada@gmail.com writes:
I have read here that there are 2 objections to fuel in the wings:
1.- That the fuel will hurt the bonding of the wings
2.- That it will give a higher roll inertia
Am I missing some other point ?
I guess that the second objection is a minor objection, but the first one
surely is critical
What about having someone manufacture a bladder tank and install it inside
the wing ?
Not practical ? Too costly ?
Hi Guys.
I don't like fuel in the wing because of the for mentioned reasons plus
balder tanks are heavy and the fuel vent system is problematic and there is a
far amount of un usable fuel. I would rather use a more efficient engine
like the HKS.
Happy Flying
Mark
-
fgayford
Re: Bladder fuel tanks
Hi Mark
Is it right that the 10 gallon tank with the HKS Turbo would give you nearly 5 hours range(2 gallons per hour?)(5 hours is more than anyone over fifty is going to make with out a washroom break anyway)
I was thinking that a person could replace the plastic tank with a custom built aluminium tank to increase it to 15 gallons.
(Like some of the titans have)
Fred
Is it right that the 10 gallon tank with the HKS Turbo would give you nearly 5 hours range(2 gallons per hour?)(5 hours is more than anyone over fifty is going to make with out a washroom break anyway)
I was thinking that a person could replace the plastic tank with a custom built aluminium tank to increase it to 15 gallons.
(Like some of the titans have)
Fred
-
earthstaraircraft
Re: Bladder fuel tanks
In a message dated 2/7/2011 6:09:25 AM Pacific Standard Time,
gayford@golden.net writes:
Hi Mark
Is it right that the 10 gallon tank with the HKS Turbo would give you
nearly 5 hours range(2 gallons per hour?)(5 hours is more than anyone over
fifty is going to make with out a washroom break anyway)
I was thinking that a person could replace the plastic tank with a custom
built aluminium tank to increase it to 15 gallons.
(Like some of the titans have)
Fred
Hi Fred
You can cruse at 2 gph but 2.5 is more common. The plastic tank is Very
light about 1/4 lb per gallon. the lightest aluminum tank we have ever made
was over 1 lb per Gallon and 2 is what most people make.
Happy Flying
Mark
gayford@golden.net writes:
Hi Mark
Is it right that the 10 gallon tank with the HKS Turbo would give you
nearly 5 hours range(2 gallons per hour?)(5 hours is more than anyone over
fifty is going to make with out a washroom break anyway)
I was thinking that a person could replace the plastic tank with a custom
built aluminium tank to increase it to 15 gallons.
(Like some of the titans have)
Fred
Hi Fred
You can cruse at 2 gph but 2.5 is more common. The plastic tank is Very
light about 1/4 lb per gallon. the lightest aluminum tank we have ever made
was over 1 lb per Gallon and 2 is what most people make.
Happy Flying
Mark
-
cossitt.alan
Re: Bladder fuel tanks
Mark, do you have a 12 or 15 gallon plastic tank? Do you have any tanks
that fit below the rear seat (on a JT2)?
thought the question might be of interest to the group.
-Alan
_____
that fit below the rear seat (on a JT2)?
thought the question might be of interest to the group.
-Alan
_____
-
earthstaraircraft
Re: Bladder fuel tanks
In a message dated 2/7/2011 12:19:42 PM Pacific Standard Time,
alan.cossitt@frontier.com writes:
Mark, do you have a 12 or 15 gallon plastic tank? Do you have any tanks
that fit below the rear seat (on a JT2)?
thought the question might be of interest to the group.
-Alan
No If you find any that are not built to boat standards let me know.
Happy Flying,
Mark
alan.cossitt@frontier.com writes:
Mark, do you have a 12 or 15 gallon plastic tank? Do you have any tanks
that fit below the rear seat (on a JT2)?
thought the question might be of interest to the group.
-Alan
No If you find any that are not built to boat standards let me know.
Happy Flying,
Mark
-
blaswichk
Re: Bladder fuel tanks
Just a thought here, check the US Plastics catalog, there is a tank that might work. It's a 6 gallon flat bottom rectangular tank, made out of medium density polyethylene with UV inhibitors, and measures 12" X 15" X 8", with a 2" neck and cap. It also has gallon markings on the side, and they sell a bulkhead fitting to install as the outlet. See page 78 in their current catalog, or seach online at www.usplastics.com for stock #11347 at $36.88. They do sell small quanities, as that's how I get their catalog and e-mails.
Keep us posted,
kb
Keep us posted,
kb
-
fgayford
Re: Bladder fuel tanks
Hi Mark
I have found a plastic 15 gallon tank on the Titan Aircraft site.
It costs $400.00 plus change
Seeing Titan so carefully copied your JT2 perhaps the tank would drop right in?
I think it is worth looking into.
I have uploaded 2 pictures of the tank to the photo section "Factory Support"
Fred
I have found a plastic 15 gallon tank on the Titan Aircraft site.
It costs $400.00 plus change
Seeing Titan so carefully copied your JT2 perhaps the tank would drop right in?
I think it is worth looking into.
I have uploaded 2 pictures of the tank to the photo section "Factory Support"
Fred
-
cossitt.alan
Re: Bladder fuel tanks
I'm think what would work great for me would be a 8-10 gallon rectangular
plastic tank that would be a "drop-in" replacement (ha ha ha) for my current
aluminum 10 gal. wing tanks. That would decrease the weight of the tanks
but still give me the gas capacity. More important for me with my 2 cycle
(4 gal per hour) 85 hp engine than Mark's 4-cycle sipper.
I was talking to Dave B. here in Portland. He has Mark's 10 gallon tank but
finds it a little small when he is on long trips. He has a 503 (4.2 gal
average). Another thing for me is that I fly to remote places where gas is
rare so carrying capacity for me is more important.
Kitfox apparently has a plastic wing tank, Rans also. If any of you know of
a plastic rectangular tanks that might fit in a wing, let me know (8-10 gal
capacity).
-Alan
_____
plastic tank that would be a "drop-in" replacement (ha ha ha) for my current
aluminum 10 gal. wing tanks. That would decrease the weight of the tanks
but still give me the gas capacity. More important for me with my 2 cycle
(4 gal per hour) 85 hp engine than Mark's 4-cycle sipper.
I was talking to Dave B. here in Portland. He has Mark's 10 gallon tank but
finds it a little small when he is on long trips. He has a 503 (4.2 gal
average). Another thing for me is that I fly to remote places where gas is
rare so carrying capacity for me is more important.
Kitfox apparently has a plastic wing tank, Rans also. If any of you know of
a plastic rectangular tanks that might fit in a wing, let me know (8-10 gal
capacity).
-Alan
_____