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iv bag gas tank

Old 12-14-2016, 04:19 PM
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northernboater45
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Default iv bag gas tank

Anyone have an opinion on iv bag gas tank as opposed to a hard shell tank, undecided which way to go.

Last edited by Justaddwata; 12-15-2016 at 07:59 AM.
Old 12-15-2016, 08:02 AM
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IV are preferable in most cases - especially when racing etc when weight counts most. IV bags allow you to use every drop of fuel, no venting issues, no leaks, and light weight. Some types of IV bags do go through a conditioning process that makes them soft and slimy that you should read up on first - but once conditioned they will last for years - just do not store them empty.
Old 12-15-2016, 03:57 PM
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Thanks for your advice but why can't you store them empty?
Old 12-17-2016, 04:21 PM
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Air hardens them once they've been used. Try to avoid air pockets in them also when full or partially as if left for a while they'll get hard spots. This makes them so they won't collapse as it empties.
Next, you'll get into brands. Although I used Baxter's for years I swapped over to the ones that Zippkits sells. He sells them as fuel cells because of what he'd have to do to keep them from being for medical use. They're thicker and seem to last longer to me. I've tried others and have has bad luck with them.
Some still like hard tanks but Matt told you why a lot of us don't.
Old 01-18-2017, 10:10 PM
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to be honest you really can,t beat the good old design Clunk style fuel tanks such as Dubro / Kavan / Sullivan etc. i have pernsonally never used a bag type [ only when i was in hospital ha ha ] so i cant say if there any better atall compared to the plastic clunk tanks but i can say a clunk tank has never ever given me an ounce of trouble in my 40 odd years of r/c modelling.
Old 01-19-2017, 08:35 PM
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I scored a lot of Baxter bags in the hospital, mostly 1,000ml's but I've seen them as small as 50ml, that's what they put the really expensive stuff in, I heard $3,000.00 for what they had in mine! I got funny looks from the nurses when I told them why I needed them and usually showed them pictures on my cell phone. I use the 500ml's so I've got 1,000's that I probably will never use.
Old 01-19-2017, 09:02 PM
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deleted not arguing with this Crappretender

Last edited by mistycreekboats; 01-21-2017 at 01:41 PM. Reason: save comments for people who actually own a boat
Old 01-19-2017, 10:30 PM
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see you have one of those cheapo chinese pipes on the cat . how do they go allright ?
Old 01-19-2017, 10:55 PM
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deleted not arguing with this Crappretender

Last edited by mistycreekboats; 01-21-2017 at 01:42 PM. Reason: no need to argue with someone who doesn't own a boat
Old 01-20-2017, 03:05 PM
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It would be prefereable if member [ MISTYCREEKBOATS ] would please not respond to my questions and or answers to any of my posts due to Intimidation and false accuseations made in previous above posts.
Thankyou.

Last edited by crapshooter; 01-20-2017 at 06:41 PM.
Old 01-20-2017, 05:14 PM
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Why would anyone respond to you Johnny - you showed your colors

Have fun - maybe I'll post your PM here ......Lol

Last edited by mistycreekboats; 01-23-2017 at 06:55 PM. Reason: I'll save comments for people who own a boat
Old 01-20-2017, 06:27 PM
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Originally Posted by mistycreekboats
Why would anyone respond to you Johnny - you showed your colors. Just what we wanted to see.

see how long your on here

Have fun
Ummmmm. who is jonny ????? i think you have the wrong person here.
Old 01-20-2017, 06:41 PM
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Originally Posted by mistycreekboats
Why would anyone respond to you Johnny - you showed your colors. Just what we wanted to see.

see how long your on here

Have fun
Ummmmm. who is jonny ????? i think you have the wrong person here.
Old 01-25-2017, 04:53 PM
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Ron Olson
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Clunk style tanks let the fuel slosh around and when the tank gets close to being empty you can get air in the line and shut down the engine. Improperly vented in case of a flip can allow water into the tank, things that won't happen with an IV bag setup. Generally they won't fully empty either.
Old 01-25-2017, 08:26 PM
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I do suppose it boils down to what your used to using as a fuel tank . as i said i have never tried a fuel bag tank but i have heard several reports of these bags leaking prematurely, there is a thread on Jims Boat Dock where a guy has only changed his oil brand and now his fuel bag leaks. maybe one day i might try one , as for now i do like the clunk tank set up i do as there very reliable and don,t take in any air bubbles due to a 1 ounce hopper tank i use for main fuel feed pickup, this little tank stays full until the main tank runs totally dry, no weight in these either . one thing about the fuel bag that has allways given me thought is ; would the carby diaphram have to work alot harder due to the extra suction from the bag , having no breather ?
Old 01-25-2017, 09:10 PM
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No, the bags collapse as fuel is used so there's no extra effort involved.
Yes, there are good and bad IV bags. I've had the worst luck with Dr. Buck's bags, good with Baxter's and the Zippkits fuel cells. Joe at Zippkits calls them fuel cells for legal reasons.
Old 01-26-2017, 01:57 PM
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arn,t just about all of the fuel cell bags designed for hospital patient use ? as in for Drip use etc ? looks like you have to select the correct bag thats going to be compatable with both your fuel / oil and know how to keep the bag in good condition so it doesn,t split , as in leave fuel in the bag maybe. i must say though the fuel cell bags are now quite popular in r/c powerboats , originated from r/c pylon race aircraft.
Old 01-26-2017, 05:05 PM
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Yes, just about. That's why I said that the Zippkits versions are referred to as fuel cells as they are very much like IV bags but genuine IV bags have to go through FDA approval and not meant for medical use. Some handle fuel better than others, that's why we have to be picky as to which ones we use as some do not like gas or flammable liquids.
As far as being used in planes, I don't know about that. As far as I know, most pylon planes are nitro powered and pressurized so they would not work well at all for nitro use. I know that they have been tried successfully in large gas powered planes. A former article writer for this site, Matt Gunn tried them out with the flyers.
Old 01-26-2017, 08:53 PM
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yes Ron the fuel cells are used in F3D Pylon not sure if there the soft bag or a hard tank type though .

Last edited by crapshooter; 01-26-2017 at 09:05 PM.

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