Today's Message Index:
----------------------
1. 03:06 AM - Re: Need explanation of fuel system w/dual 5gal pickups (George Bearden)
2. 04:13 AM - Re: Need explanation of fuel system w/dual 5gal pickups (racerjerry)
3. 05:08 AM - Re: Need explanation of fuel system w/dual 5gal pickups (Richard Girard)
4. 05:45 AM - Re: Need explanation of fuel system w/dual 5gal pickups (Frank)
5. 06:36 AM - Re: Need explanation of fuel system w/dual 5gal pickups (Richard Pike)
6. 07:52 AM - Re: Need explanation of fuel system w/dual 5gal pickups (Richard Girard)
7. 07:59 AM - Re: Need explanation of fuel system w/dual 5gal pickups (Thom Riddle)
8. 08:04 AM - Re: Re: Need explanation of fuel system w/dual 5gal pickups (Frank)
9. 09:30 AM - Re: Need explanation of fuel system w/dual 5gal pickups (Frank)
10. 09:44 AM - Re: Need explanation of fuel system w/dual 5gal pickups (Frankd)
11. 10:17 AM - Re: Need explanation of fuel system w/dual 5gal pickups (b young)
12. 11:07 AM - Re: Need explanation of fuel system w/dual 5gal pickups (Dan)
13. 08:30 PM - Re: Upgrading from 503 to 582 on Mark III (lownslow)
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| Subject: | RE: Need explanation of fuel system w/dual 5gal pickups |
> It seems to me that once air is introduced to EITHER fuel pickup, the
system will be fuel starved.
Are the tanks at the same level?
Are the pickups descending from a fitting at the bottom of the tanks, or do
they drop down into the tanks from above?
If the tanks are level, then when you suck air both tanks will be almost
completely empty.
In the case where the tanks are not level, if the pickups descend from a
bottom fitting the weight of the fuel will displace the air potentially
introduced from the empty tank, and the fuel line will have fuel in it.
I have no experience with what I'm talking about here, I was just
visualizing the situation. I probably have misunderstood you cuz I imagine
you have already thought of all this.
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| Subject: | Re: Need explanation of fuel system w/dual 5gal pickups |
If you are feeding fuel from fittings attached to the bottom of each tank; and
both tanks are vented and at the same level, then gravity will do a good job of
evenly emptying both tanks. I didnt care much for drilling holes in the bottom
of the tanks, so I opted to feed fuel from the top of each tank.
If you are feeding fuel sucking from the top of each tank, then things are a bit
different. Fuel flow here is more dependent on venting pressures for each tank
to empty evenly. You are correct in that if one tank sucks air, its GAME
OVER. I had one forced landing because of this and attributed it to a small pressure
difference between the tank vents (they are located fore and aft in a
breezy spot behind the pilot/passenger) where most likely each vent was subjected
to different airflow patterns. There was only a small amount of fuel left
in the other tank; so the system worked OK as long as neither one got too low.
You might try tying both vents together to equalize any pressure differences;
but just dont let the fuel level get too low and you wont have to worry about
it.
--------
Jerry King
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=405886#405886
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| Subject: | Re: Need explanation of fuel system w/dual 5gal pickups |
Dave, I battled this one on my Mk III. My solution was to use a modified
Weatherhead valve to get left, right, both, and off so I could control the
tanks.
The modification is simple. The Weatherhead valve has a nylon ball with two
passages at right angles that meet in the center. There are four detents
that control how the passages line up with the ports. Simply drill through
one side so that there are now three passages in a "T" configuration. Which
one of the original two you use to guide the drill is only dependent on
where you want the handle to be when the the undrilled side of the ball is
over the fuel inlet port (where you want the handle when the valve is in
the OFF position.
With this solution you have absolute control over how fuel is drawn from
the tanks. On a cross country flight when I was running low on fuel and
needed every available drop I was able to purposely run a tank dry and
switch to the tank that still had fuel before the engine died. Having a
Facet pump to boost fuel to the Mikuni pneumatic pump I got an instant
prime when I switched tanks and the engine hardly stuttered before it had
fuel from the other tank and resumed running.
Yep, bad practice that I pulled off once and never repeated. The fact that
I could do it at all was because the valve gave me complete control over
the fuel supply.
Rick Girard
do not archive
On Sat, Aug 3, 2013 at 9:29 PM, dsmithlib <dsmithlib@ameritech.net> wrote:
>
> I am rebuilding a Firestar II project. It has two 5 gal tanks, I have the
> plans from the mid-90's and (I thought) I had a pretty good understanding
> of aviation fuel systems and venting.
>
> However, I am seeing both tanks fed together to a T and then up to the
> pump or primer etc.. What I am missing is how the fuel is drawn from the
> tanks equally. It seems to me that once air is introduced to EITHER fuel
> pickup, the system will be fuel starved.
>
> I realize there is something I am not picking up from the drawings. I do
> not see any depiction of the venting which may hold the key. In any event,
> I would appreciate a few comments on best practices for plumbing the two
> standard 5 gal tanks.
>
> Thanks,
> Dave
>
> --------
> Dave Smith
> RV7 Flying
> Kolb Firestar II (in-progress)
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=405880#405880
>
>
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
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| Subject: | Re: Need explanation of fuel system w/dual 5gal pickups |
Richard
What is weather head valve?
Where can I get one?
How can I be sure it is good for
Fuel?
Thanks
Frank
Sent from my iPhone
On Aug 4, 2013, at 7:07 AM, Richard Girard <aslsa.rng@gmail.com> wrote:
> Dave, I battled this one on my Mk III. My solution was to use a modified W
eatherhead valve to get left, right, both, and off so I could control the ta
nks.
> The modification is simple. The Weatherhead valve has a nylon ball with tw
o passages at right angles that meet in the center. There are four detents t
hat control how the passages line up with the ports. Simply drill through on
e side so that there are now three passages in a "T" configuration. Which on
e of the original two you use to guide the drill is only dependent on where y
ou want the handle to be when the the undrilled side of the ball is over the
fuel inlet port (where you want the handle when the valve is in the OFF pos
ition.
> With this solution you have absolute control over how fuel is drawn from t
he tanks. On a cross country flight when I was running low on fuel and neede
d every available drop I was able to purposely run a tank dry and switch to t
he tank that still had fuel before the engine died. Having a Facet pump to b
oost fuel to the Mikuni pneumatic pump I got an instant prime when I switche
d tanks and the engine hardly stuttered before it had fuel from the other ta
nk and resumed running.
> Yep, bad practice that I pulled off once and never repeated. The fact that
I could do it at all was because the valve gave me complete control over th
e fuel supply.
>
> Rick Girard
> do not archive
>
>
> On Sat, Aug 3, 2013 at 9:29 PM, dsmithlib <dsmithlib@ameritech.net> wrote:
>>
>> I am rebuilding a Firestar II project. It has two 5 gal tanks, I have th
e plans from the mid-90's and (I thought) I had a pretty good understanding o
f aviation fuel systems and venting.
>>
>> However, I am seeing both tanks fed together to a T and then up to the pu
mp or primer etc.. What I am missing is how the fuel is drawn from the tan
ks equally. It seems to me that once air is introduced to EITHER fuel picku
p, the system will be fuel starved.
>>
>> I realize there is something I am not picking up from the drawings. I do
not see any depiction of the venting which may hold the key. In any event,
I would appreciate a few comments on best practices for plumbing the two st
andard 5 gal tanks.
>>
>> Thanks,
>> Dave
>>
>> --------
>> Dave Smith
>> RV7 Flying
>> Kolb Firestar II (in-progress)
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=405880#405880
>>
>>
>>
>>
>>
>>
>>
>> ==========
>> arget="_blank">http://www.matronics.com/Navigator?Kolb-List
>> ==========
>> http://forums.matronics.com
>> ==========
>> le, List Admin.
>> ="_blank">http://www.matronics.com/contribution
>> ==========
>
>
>
> --
> Zulu Delta
> Mk IIIC
> Thanks, Homer GBYM
>
> It isn't necessary to have relatives in Kansas City in order to be unhappy
.
> - Groucho Marx
>
>
>
==========================
=========
==========================
=========
==========================
=========
==========================
=========
>
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| Subject: | Re: Need explanation of fuel system w/dual 5gal pickups |
If switching tanks does not appeal to you, think about adding a hopper tank. Go
to Home Depot and purchase some 4" PVC pipe and flat end caps. They sell 3 types
of PVC pipe, one is thick wall and heavy, and the other is thin wall. The
third type has a foam core, don't get the foam core. Gasoline doesn't affect
the PVC. Make it whatever size you can get to fit anywhere near the back seat
and below the level of the stock tanks. Make up some appropriate brackets and
clamp it securely in place. It doesn't need to be very big, it just needs to hold
a quart or so and be the lowest point in the system.
NAPA auto parts sells a metal tire valve stem with a wide flat flange on each side
and rubber gaskets, you can drill it out and use it as a fuel fitting, put
it into the flat end cap of the pipe.
Set it up so that both of your stock tanks drain into the hopper tank, and the
hopper tank goes to your Facet pump. The fitting that goes to the Facet pump is
obviously the lowest point in the system. Also rig it for a sump drain. Since
this little hopper tank is below your stock tanks, you don't care if one of
them drains dry, you only have to be on the ground before both of them drain dry.
If you want to spend about $150 for various pieces-parts (mostly on on brass T fittings) you can put in 2 of these things, mount them vertically beside the forwardmost stock tank, and gain a bit over 2 gallons of fuel. Figuring out how to arrange all the plumbing will have you making up a real flow chart, but if you want 12 gallons of usable fuel, here's how to do it: http://www.bcchapel.org/pages/0003/FSIITankMods.html
--------
Richard Pike
Kolb MKIII N420P (420ldPoops)
richard (at) bcchapel(dot)org
Kingsport, TN 3TN0
Now faith is the substance of things hoped for, the evidence of things not seen.
Hebrews 11:1
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=405898#405898
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| Subject: | Re: Need explanation of fuel system w/dual 5gal pickups |
Frank, Here you go.
http://www.aircraftspruce.com/catalog/appages/whfsv.php
Rick
On Sun, Aug 4, 2013 at 7:44 AM, Frank <frank.goodnight@att.net> wrote:
> Richard
> What is weather head valve?
> Where can I get one?
> How can I be sure it is good for
> Fuel?
> Thanks
> Frank
>
> Sent from my iPhone
>
> On Aug 4, 2013, at 7:07 AM, Richard Girard <aslsa.rng@gmail.com> wrote:
>
> Dave, I battled this one on my Mk III. My solution was to use a modified
> Weatherhead valve to get left, right, both, and off so I could control the
> tanks.
> The modification is simple. The Weatherhead valve has a nylon ball with
> two passages at right angles that meet in the center. There are four
> detents that control how the passages line up with the ports. Simply drill
> through one side so that there are now three passages in a "T"
> configuration. Which one of the original two you use to guide the drill is
> only dependent on where you want the handle to be when the the undrilled
> side of the ball is over the fuel inlet port (where you want the handle
> when the valve is in the OFF position.
> With this solution you have absolute control over how fuel is drawn from
> the tanks. On a cross country flight when I was running low on fuel and
> needed every available drop I was able to purposely run a tank dry and
> switch to the tank that still had fuel before the engine died. Having a
> Facet pump to boost fuel to the Mikuni pneumatic pump I got an instant
> prime when I switched tanks and the engine hardly stuttered before it had
> fuel from the other tank and resumed running.
> Yep, bad practice that I pulled off once and never repeated. The fact that
> I could do it at all was because the valve gave me complete control over
> the fuel supply.
>
> Rick Girard
> do not archive
>
>
> On Sat, Aug 3, 2013 at 9:29 PM, dsmithlib <dsmithlib@ameritech.net> wrote:
>
>>
>> I am rebuilding a Firestar II project. It has two 5 gal tanks, I have
>> the plans from the mid-90's and (I thought) I had a pretty good
>> understanding of aviation fuel systems and venting.
>>
>> However, I am seeing both tanks fed together to a T and then up to the
>> pump or primer etc.. What I am missing is how the fuel is drawn from the
>> tanks equally. It seems to me that once air is introduced to EITHER fuel
>> pickup, the system will be fuel starved.
>>
>> I realize there is something I am not picking up from the drawings. I do
>> not see any depiction of the venting which may hold the key. In any event,
>> I would appreciate a few comments on best practices for plumbing the two
>> standard 5 gal tanks.
>>
>> Thanks,
>> Dave
>>
>> --------
>> Dave Smith
>> RV7 Flying
>> Kolb Firestar II (in-progress)
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=405880#405880
>>
>>
>>
>>
>>
>>
>>
>> ==========
>> arget="_blank">http://www.matronics.com/Navigator?Kolb-List
>> ==========
>> http://forums.matronics.com
>> ==========
>> le, List Admin.
>> ="_blank">http://www.matronics.com/contribution
>> ==========
>>
>>
>>
>>
>
>
> --
> Zulu Delta
> Mk IIIC
> Thanks, Homer GBYM
>
> It isn't necessary to have relatives in Kansas City in order to be unhappy.
> - Groucho Marx
>
> *
>
> ==================================
> ://www.matronics.com/Navigator?Kolb-List
> ===================================cs.com
> ===================================matronics.com/contribution
> ==================================
> *
>
> *
>
> *
>
>
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
Message 7
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| Subject: | Re: Need explanation of fuel system w/dual 5gal pickups |
My Slingshot had two 5 gallon tanks with a connection tube between them close to
the bottom so that they acted almost as if they were one tank. I say almost
because the connection was not in the bottom but on the side wall close to the
bottom. The line to the electric fuel pump was from the top in the rear of the
two tanks since it is a bit lower than the front except in a dive. The vent
from the top of front tank went down and exited below the fuselage. Since the
connection line was small (1/4") the flow between the two tanks was not nearly
as fast as the rate you can fill the tanks. It is quicker to fill both than wait
for one to drain to the other.
If you don't mind putting holes in the bottom of the tank, which is what I would
have done had I been the builder, the connection line will make them effectively
one 10 gallon tank. RANS Aircraft has an excellent fuel tank fitting for
the bottom of tanks and they do not leak.
--------
Thom Riddle
Buffalo, NY (9G0)
Don't worry about old age... it doesn't last very long.
- Anonymous
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=405903#405903
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| Subject: | Re: Need explanation of fuel system w/dual 5gal pickups |
Richard
The metal tire valve you mentioned
Also makes an excelant fitting if you want to feed from the bottom of
The tanks. Just drill out the center
And use a fuel proof gasket.
Used them for years my firestar.
Frank----they come in 2 sizes, the
Long ones work best.
Sent from my iPhone
On Aug 4, 2013, at 8:36 AM, "Richard Pike" <richard@bcchapel.org> wrote:
>
> If switching tanks does not appeal to you, think about adding a hopper tank.
Go to Home Depot and purchase some 4" PVC pipe and flat end caps. They sell 3
types of PVC pipe, one is thick wall and heavy, and the other is thin wall. The
third type has a foam core, don't get the foam core. Gasoline doesn't affect
the PVC. Make it whatever size you can get to fit anywhere near the back seat
and below the level of the stock tanks. Make up some appropriate brackets and
clamp it securely in place. It doesn't need to be very big, it just needs to
hold a quart or so and be the lowest point in the system.
>
> NAPA auto parts sells a metal tire valve stem with a wide flat flange on each
side and rubber gaskets, you can drill it out and use it as a fuel fitting, put
it into the flat end cap of the pipe.
>
> Set it up so that both of your stock tanks drain into the hopper tank, and the
hopper tank goes to your Facet pump. The fitting that goes to the Facet pump
is obviously the lowest point in the system. Also rig it for a sump drain. Since
this little hopper tank is below your stock tanks, you don't care if one of
them drains dry, you only have to be on the ground before both of them drain
dry.
>
> If you want to spend about $150 for various pieces-parts (mostly on on brass T fittings) you can put in 2 of these things, mount them vertically beside the forwardmost stock tank, and gain a bit over 2 gallons of fuel. Figuring out how to arrange all the plumbing will have you making up a real flow chart, but if you want 12 gallons of usable fuel, here's how to do it: http://www.bcchapel.org/pages/0003/FSIITankMods.html
>
> --------
> Richard Pike
> Kolb MKIII N420P (420ldPoops)
> richard (at) bcchapel(dot)org
> Kingsport, TN 3TN0
> Now faith is the substance of things hoped for, the evidence of things not seen.
> Hebrews 11:1
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=405898#405898
>
>
>
>
>
>
>
>
>
>
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| Subject: | Re: Need explanation of fuel system w/dual 5gal pickups |
Richard
Thanks , Got one on my701but didn't
Know it. Was going to buy new valves
And replumb,so i could run from both tanks ,your method is a lot quicker
Eaiser and cheaper.Love this Kolb list.
Frank
Sent from my iPhone
On Aug 4, 2013, at 9:52 AM, Richard Girard <aslsa.rng@gmail.com> wrote:
> Frank, Here you go.
> http://www.aircraftspruce.com/catalog/appages/whfsv.php
>
> Rick
>
>
> On Sun, Aug 4, 2013 at 7:44 AM, Frank <frank.goodnight@att.net> wrote:
>> Richard
>> What is weather head valve?
>> Where can I get one?
>> How can I be sure it is good for
>> Fuel?
>> Thanks
>> Frank
>>
>> Sent from my iPhone
>>
>> On Aug 4, 2013, at 7:07 AM, Richard Girard <aslsa.rng@gmail.com> wrote:
>>
>>> Dave, I battled this one on my Mk III. My solution was to use a modified
Weatherhead valve to get left, right, both, and off so I could control the t
anks.
>>> The modification is simple. The Weatherhead valve has a nylon ball with t
wo passages at right angles that meet in the center. There are four detents t
hat control how the passages line up with the ports. Simply drill through on
e side so that there are now three passages in a "T" configuration. Which on
e of the original two you use to guide the drill is only dependent on where y
ou want the handle to be when the the undrilled side of the ball is over the
fuel inlet port (where you want the handle when the valve is in the OFF pos
ition.
>>> With this solution you have absolute control over how fuel is drawn from
the tanks. On a cross country flight when I was running low on fuel and nee
ded every available drop I was able to purposely run a tank dry and switch t
o the tank that still had fuel before the engine died. Having a Facet pump t
o boost fuel to the Mikuni pneumatic pump I got an instant prime when I swit
ched tanks and the engine hardly stuttered before it had fuel from the other
tank and resumed running.
>>> Yep, bad practice that I pulled off once and never repeated. The fact th
at I could do it at all was because the valve gave me complete control over t
he fuel supply.
>>>
>>> Rick Girard
>>> do not archive
>>>
>>>
>>> On Sat, Aug 3, 2013 at 9:29 PM, dsmithlib <dsmithlib@ameritech.net> wrot
e:
>>>>
>>>> I am rebuilding a Firestar II project. It has two 5 gal tanks, I have t
he plans from the mid-90's and (I thought) I had a pretty good understanding
of aviation fuel systems and venting.
>>>>
>>>> However, I am seeing both tanks fed together to a T and then up to the p
ump or primer etc.. What I am missing is how the fuel is drawn from the ta
nks equally. It seems to me that once air is introduced to EITHER fuel pick
up, the system will be fuel starved.
>>>>
>>>> I realize there is something I am not picking up from the drawings. I d
o not see any depiction of the venting which may hold the key. In any event
, I would appreciate a few comments on best practices for plumbing the two s
tandard 5 gal tanks.
>>>>
>>>> Thanks,
>>>> Dave
>>>>
>>>> --------
>>>> Dave Smith
>>>> RV7 Flying
>>>> Kolb Firestar II (in-progress)
>>>>
>>>>
>>>>
>>>>
>>>> Read this topic online here:
>>>>
>>>> http://forums.matronics.com/viewtopic.php?p=405880#405880
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> ==========
>>>> arget="_blank">http://www.matronics.com/Navigator?Kolb-List
>>>> ==========
>>>> http://forums.matronics.com
>>>> ==========
>>>> le, List Admin.
>>>> ="_blank">http://www.matronics.com/contribution
>>>> ==========
>>>
>>>
>>>
>>> --
>>> Zulu Delta
>>> Mk IIIC
>>> Thanks, Homer GBYM
>>>
>>> It isn't necessary to have relatives in Kansas City in order to be unhap
py.
>>> - Groucho Marx
>>>
>>>
>>>
>>> =========
>>> ://www.matronics.com/Navigator?Kolb-List
>>> =========
>>> cs.com
>>> =========
>>> matronics.com/contribution
>>> =========
>>>
>>
>>
>> get="_blank">http://www.matronics.com/Navigator?Kolb-List
>> tp://forums.matronics.com
>> _blank">http://www.matronics.com/contribution
>>
>
>
>
> --
> Zulu Delta
> Mk IIIC
> Thanks, Homer GBYM
>
> It isn't necessary to have relatives in Kansas City in order to be unhappy
.
> - Groucho Marx
>
>
>
==========================
=========
==========================
=========
==========================
=========
==========================
=========
>
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| Subject: | Re: Need explanation of fuel system w/dual 5gal pickups |
Hi Dave,
I have the two tank system in my MkIII Xtra.
The fuel pickup tubes go to the bottom of both tanks and I have connected them
with a T at the top and then this single fuel line I run down to a fuel pump placed
at the height of the bottom of the tanks.
The trick is to initially suck fuel from BOTH tanks so there is no air in the lines.
Both 5Gal tanks are side by side so if one is full and one is half full the fuel
will eventually flow from the full to the lower until they are equal.
My vent lines just plumb into the top of the tank and I run them up about 6 inches
and then down to the outside of the plane. In case I go inverted the fuel
will stay outside the aircraft.
This system acts like one tank, no switching required. Just fill both up equally
and its fine.
I'm thinking of adding another 5 gal tank and may add a valve as a control into
the 1st two if I do that.
Hope this helps.
Oh, I also have two fuel filters, one just after the T at the top of the tank
and one on the fuel pump. No problems so far, 50Hrs flying.
FrankD
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=405914#405914
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| Subject: | Re: Need explanation of fuel system w/dual 5gal pickups |
I have never tried this, but offer it to you for your consideration,,
you would have to do some experimenting to see if the system works, or
how hard to eliminate all the air.
if you come out of the top of both tanks,,, then loop the lines to
below both tanks and put the tee from both tanks and the inlet to the
engine in the bottom of the cage. you would have to start a siphon from
each tank to purge the air from both lines and establish a siphon.
then each tank will drain via the siphon line to the tee. if one tank
goes empty the siphon for that tank will quit, the other will continue
to siphon till it is empty, if one tank is empty the other tank will
keep the area of the tee (going to the engine) flooded with fuel, this
should keep the engine happy till the second tank empties and the second
siphon is lost. at that point you are out of gas and are going to let
gravity be a major part of flying the plane. down side would be if
you had a vacuum leak that stopped the siphon on one tank... your
engine could quit with one tank full. to prevent this,, you could put
a =9Cleft right or both=9D valve at the bottom the cage in
place of a simple T,
just thinking out loud.
boyd young
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
I am rebuilding a Firestar II project. It has two 5 gal tanks, I have
the plans from the mid-90's and (I thought) I had a pretty good
understanding of aviation fuel systems and venting.
However, I am seeing both tanks fed together to a T and then up to the
pump or primer etc.. What I am missing is how the fuel is drawn from the
tanks equally. It seems to me that once air is introduced to EITHER fuel
pickup, the system will be fuel starved.
I realize there is something I am not picking up from the drawings. I do
not see any depiction of the venting which may hold the key. In any
event, I would appreciate a few comments on best practices for plumbing
the two standard 5 gal tanks.
Thanks,
Dave
Message 12
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| Subject: | Re: Need explanation of fuel system w/dual 5gal pickups |
One way to do it is to just use the front tank to feed the carbs via the Mi
kuni pump, and use a facet pump to transfer fuel in flight. -When you fee
l fuel on the back of your neck you know your font tank is full... -Once
you feel the fuel on your neck you will never take your hand off the pump s
witch during a transfer again.=0A=0ASome good fuel system suggestions:-
=0Ahttp://www.challengers101.com/FuelSys.html=0A-=0A=0A=0A=0A=0A=0A______
__________________________=0A From: dsmithlib <dsmithlib@ameritech.net>=0AT
o: kolb-list@matronics.com =0ASent: Saturday, August 3, 2013 9:29 PM=0ASubj
ect: Kolb-List: Need explanation of fuel system w/dual 5gal pickups=0A =0A
=0A=0AI am rebuilding a Firestar II project.- It has two 5 gal tanks, I h
ave the plans from the mid-90's and (I thought) I had a pretty good underst
anding of aviation fuel systems and venting.=0A=0AHowever, I am seeing both
tanks fed together to a T and then up to the pump or primer etc..- What
I am missing is how the fuel is drawn from the tanks equally.- It seems
to me that once air is introduced to EITHER fuel pickup, the system will be
fuel starved.- =0A=0AI realize there is something I am not picking up fr
om the drawings.- I do not see any depiction of the venting which may hol
d the key.- In any event, I would appreciate a few comments on best pract
ices for plumbing the two standard 5 gal tanks.=0A=0AThanks,=0ADave=0A=0A--
------=0ADave Smith=0ARV7 Flying=0AKolb Firestar II (in-progress)=0A=0A=0A
=0A=0ARead this topic online here:=0A=0Ahttp://forums.matronics.com/viewtop
- - - - - - - - - - - - -Matt Dralle, List Admin.
====
Message 13
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| Subject: | Re: Upgrading from 503 to 582 on Mark III |
can I throw another question out there? I am putting a "Rotax Rick" 670 on a Classic
Mark III and I'm wondering if I am OK with an E gearbox(after seeing the
comment regarding having to move the 582 mount back 3/4" to clear the starter
going from the 503 to the 582
any thoughts? am I ok with the E gearbox?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=405945#405945
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