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HelicopterMain Discussion › Header Tank, is it really necessary ?
12-15-2003 01:11 PM  13 years agoPost 1
Lock-Tite

rrVeteran

Quebec, Canada

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I have a header tank installed but wonder if it is really needed. It is additional compnent that may fail (fuel tubing), but it can also save your heli too by seeing the remaining fuel easily and reduce foaming. And if the clunk disconnects the header tank will reduce foaming + air bubbles entering the carburator....

If we know how long we can fly (full tank) we don't need to see the remaining fuel with a header tank ?

If the fuel we use does not foam (just a bit), we dont really need a header tank ?

What is your point of view of a header tank ?

Frank
Dont forget to bring a clean pair of shorts when flying 3D ;)

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12-15-2003 01:26 PM  13 years agoPost 2
SteveH

rrProfessor

Texas

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I get a more consistant engine run with the header tank, so I use them.

The government cannot give you anything without first taking it from someone else.

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12-15-2003 01:32 PM  13 years agoPost 3
nocontrol

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Cape Town, South Africa

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I agree with SteveH

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12-15-2003 01:33 PM  13 years agoPost 4
Lock-Tite

rrVeteran

Quebec, Canada

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Here some interesting informations

http://groups.google.com/groups?q=h...spam.com&rnum=4

and this

http://groups.google.com/groups?q=h...erve.com&rnum=5

and this

http://groups.google.com/groups?q=h...0czeslaw&rnum=6

Frank
Dont forget to bring a clean pair of shorts when flying 3D ;)

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12-15-2003 06:51 PM  13 years agoPost 5
Jagboy69

rrKey Veteran

Miami

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this one's easy////////// YES! you'll thank me later..

Jason /// Sceadu50/9chp WWW.Jagboy69.com

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12-15-2003 07:50 PM  13 years agoPost 6
rgm440

rrApprentice

Toledo Bend Lake, La.

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Header tk.

Very good insurance at a minor cost. You won't be sorry -- Ron

It's fun to be crazy

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12-15-2003 10:05 PM  13 years agoPost 7
AGRAV8

rrProfessor

Mosquito Coast......Houston Texas

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Keep it on

for all the above reasons..........

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12-16-2003 01:34 AM  13 years agoPost 8
Tulsaboy

rrApprentice

Tulsa, Okie-la-homie

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Header tank

don't personally care to run them..yet another opinion...agree, along with ctseaplane...

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12-16-2003 01:36 AM  13 years agoPost 9
RappyTappy

rrProfessor

North Denver, Colorado

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On a non-pressurized OS motor, you NEED a header tank. On a YS motor, you don't need one because they are pressurized. If an OS motor even gets a sip of air it will cough and die.

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12-16-2003 02:13 AM  13 years agoPost 10
reddragon

rrElite Veteran

Brooklyn, N.Y.

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"If an OS motor even gets a sip of air it will cough and die."

Sorry I can not agree with that. It may sputter and run lean a little and then keep running. If it gets more air it will lean and die.

Wayne - Fly it like you stole it! You're in good hands with Runryder!

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12-16-2003 04:33 AM  13 years agoPost 11
Airman98

rrKey Veteran

Southern Illinois

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Without a header tank the clunk is floping around in a tank with air but with a header the tank always has fuel in it.

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12-16-2003 05:48 AM  13 years agoPost 12
KC

rrElite Veteran

WA

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---

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12-16-2003 07:11 AM  13 years agoPost 13
RappyTappy

rrProfessor

North Denver, Colorado

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Sorry I can not agree with that. It may sputter and run lean a little and then keep running. If it gets more air it will lean and die.
OK

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12-16-2003 03:49 PM  13 years agoPost 14
Lock-Tite

rrVeteran

Quebec, Canada

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Wow ! thanks alot for the replies, verry good informations, I think if we draw a line of positive and negative points we will end up with a positive value.

Having a Header Tank has pros and cons but finally it has more pros.

I will keep it.

Thanks.

Frank
Dont forget to bring a clean pair of shorts when flying 3D ;)

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12-16-2003 06:55 PM  13 years agoPost 15
RappyTappy

rrProfessor

North Denver, Colorado

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Good decision lock-tite, you're saving yourself some money and rebuild time, trust me, I know

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12-18-2003 07:48 AM  13 years agoPost 16
Helimex

rrApprentice

Oklahoma

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Can't see the main tank on my Ergo 30 worth a damn, so the header tank is almost a necessity for me, plus the extra flight time is nice also.

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12-18-2003 08:31 AM  13 years agoPost 17
nocontrol

rrVeteran

Cape Town, South Africa

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Go swing a bucket of water around and stop when the bucket is over your head

Put a header on.

On my YS after a flight of hovering, rolls and loops (swinging the bucket all the way around) I find no air in header tank - you can leave it off.

After a 3D flight with "stopping" when you are on top of loop (swinging bucket and stopping on top of yourself), tick tock's, ....... I find a lot of air in header tank - put the tank on.

Funny enought - the same goes for my OS motors without any pump!

I fly with header tank!!!!!

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12-18-2003 01:12 PM  13 years agoPost 18
KC

rrElite Veteran

WA

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----

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12-18-2003 03:35 PM  13 years agoPost 19
Tulsaboy

rrApprentice

Tulsa, Okie-la-homie

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"quote" C.Younbloods book of Q&A

The original point benind the header tanks was to try and get a more even fuel flow into the tank. The idea was, if the header tank was placed level with the intake of the carburetor you would get better fuel draw. But in reality, it does not work that way. The pressure in the header tank is affected by the pressure in the main tank, so within reason, the height of the header tank does not affect fuel draw...........Advantages of the header tank are..It improves visibility of the fuel level, Helps if you have main tank foaming problems, It gives a little more total fuel capacity...........I personally do not use header tanks because: I can see my main tank fine, I do not have tank foaming problems, I already have a huge fuel tank, I do not like the added complexity (more things to go wrong)..end quote..

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12-18-2003 07:09 PM  13 years agoPost 20
MJA

rrKey Veteran

UK

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<<
I do not like the added complexity (more things to go wrong)..end quote..
>>

Although keeping it simple is one of his trademarks,
something tells me that bit of advice was written before his own
necessity to use Perry pumps on his OS91SH's.The extra pipework (1 extra piece of fueltubing) for a header tank,
makes the original
Perry setup complexity
look like the pipework on a Petrochemical plant.The check valves aren't the most reliable things either

Ironically usually the clunk/seal, or piping in/from the main tank gives the most trouble,
whether using a header tank or not.If that fails you would have trouble either way
Single fixing point anodised aluminium bracket header tanks can sometimes fatigue snap ,but that would serve you right for having too much un needed Bling on your heli

.The already have a huge tank bit was also written when he still used 61's,the same fuel doesn't go as far with a 91 (or a hot 50 in a 30 size ship)

Some fuel tank shapes relative to their clunk takeoff point (tank exit)
just don't work too well (in all situations) without a header tank.A raptor 30 V1 for example ,if you cut the clunk line too short it will starve at certain flight orientations when the tank is about 1/4 full
.If you leave it too long it will momentarily jam up when doing end over end slow travelling flips,then fuel starve and die.I found this out the hard way by not using a header tank.It was one of the things that finally converted me as i never used to use them at all

A reason for not using a header tank and the main one IMO,
is they are a ripoff

.We get charged 3 or 4 times the price of a similiar capacity tank for a fixed wing model.I usually just tie wrap a small sullivan slant tank to the side ,but i did buy a couple of full priced proper heli header tanks (K&S with plastic bracket)Must have been a moment of weakness


Martin

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HelicopterMain Discussion › Header Tank, is it really necessary ?
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