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Metal Tanks

Ideas for making one......

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PatMc01/01/2014 19:07:05
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When I flew C/L I usualy used light bowden cable inner or heavyweight laystrate for leadouts rather than standard laystrate.

Edited By PatMc on 01/01/2014 19:08:30

Peter Miller01/01/2014 19:30:08
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I used 7 strand Laystrate. for the leadouts. I have a very pecious reel of it still just for that job.

Wilco Wingco30/07/2019 12:52:48
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Can you use EMPTY beer cans to make tanks?. Thin, light and pliable , easily worked and the new low temp "solder" available from a well know auction site should do the trick?. What do you think.yes

Doc Marten30/07/2019 13:08:11
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I can't see why it wouldn't work, the alloy rods have a lower melting point than aluminium and flow very well but you would need to practice first on such thin material as it would be very easy to blow holes in it or reduce it to liquid.

The idea has legs to it.

D for Donald22/11/2019 07:54:40
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What diam brass tube should be used, 1/8th or 3/32?  Also has anyone got some ready drawn tank patterns they are willing to post on here?

Edited By D for Donald on 22/11/2019 07:55:11

Edited By D for Donald on 22/11/2019 07:57:51

Peter Miller22/11/2019 08:45:29
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You normally make the tank to fit the space available.

You will need a set of bend bars. These can be two lengths of engine bearer held together with a 1/4" bolt at each end with wing nuts on.

Also I would say that a brass tube is not the best tube. You want 1/8" diameter copper tube as this can be bent without kinking.

Another old dodge. Do not drill the holes in the sheet metal for the tubes. Make the holes with a nail.This will make a dimple round the hole which will fill with solder.The solder will also rise up making a fillet. This is far, far stronger than the drilled hole.

I probably have some drawings but I will have to search through an awful lot of articles to find it.

D for Donald22/11/2019 09:18:10
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Thanks Peter, helpful as always. I mentioned brass tube as I read somewhere diesel fuel reacts with copper?

There a resurgence of interest in diesels in my club including ff radio assist and control line.

Do you put little tabs on the flat parts of the tank or solder them in as flat plate?

You might remember me, I built Oodlally some years back and it's still flying albeit after a few repairs.

Edited By D for Donald on 22/11/2019 09:21:00

Don Fry22/11/2019 09:22:14
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Wilco, when you say ' low temperature "solder" ', you mean metal wot melts into the joint, and not that glue sold as solder?

Wilco Wingco22/11/2019 10:26:21
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That's it. Also useful for making repairs to damaged engines. Great stuff and available on a well known auction site.

Peter Miller22/11/2019 10:39:56
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Posted by D for Donald on 22/11/2019 09:18:10:

Thanks Peter, helpful as always. I mentioned brass tube as I read somewhere diesel fuel reacts with copper?

There a resurgence of interest in diesels in my club including ff radio assist and control line.

Do you put little tabs on the flat parts of the tank or solder them in as flat plate?

You might remember me, I built Oodlally some years back and it's still flying albeit after a few repairs.

Edited By D for Donald on 22/11/2019 09:21:00

Good to hear that there is an interest in control line again. I am glad that you are still enjoying Oodalally.

It depends in the tank.usually a good smooth fillet of solder is fine.

My tank for Destiny is just two square "U" shaped pieces of tin with no tabs.

I always heard that it was brass tube that was affected by fuel. It never happened to me though.

I will sexe what I can find in my old articles

Peter Miller22/11/2019 10:51:37
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I have found the article on Tank making.

I will scan it and send it if you PM me your email address.

Engine Doctor22/11/2019 11:05:02
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2334 forum posts
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Hello D for D . As in other post  just make tanks with a butt joint , no tabs needed. Copper will usually occur with glow fuel that contains Nitro Methane , the high the content the quicker the errossion, If that's the correct term , of copper . It will dissolve the copper from bass tube leaving a brittle porous tube of blackened Zinc . Any fuel residue left in the tank will go a dark green colour . Never experienced it it with diesel fuel though .

Some pics of making tin tanks here . Hope its of some help . When you have finished soldering and testing the tank half fill it with some cellulose thinner to dissolve any flux/resin that can block fuel tubes . |Guess how I found out about that .

Edited By Engine Doctor on 22/11/2019 11:06:26

D for Donald22/11/2019 11:29:51
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Many thanks Peter, I have PM'd you.

D for Donald22/11/2019 11:31:37
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Thanks Engine Doc. Cant see the pics as I'm not allowed to log in the Medway club site.

D for Donald22/11/2019 11:35:20
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I have another daft Q from the uninitiated. Does a flat bottomed tank for ff radio assist always leave a bit of fuel at the bottom? Is it best to have a wedge, triangular or round bottom for instance - but this wouldbe harder to make I assume?

Peter Miller22/11/2019 11:42:51
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A slight wedge shape would work but might be a bit harder to shape but not really a problem.

In the article I give a way of making a clunk tank with the usual rubber bung.

You buy a 20 mm conduit bush. Cut it down to about 5 mm threaded portion and solder that into your tank. Yu can then use the standard rubber bung supplied with plastic tanks.

Don Fry22/11/2019 16:08:53
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4128 forum posts
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Wilco, is that then JB Weld you are proposing to seal/construct your metal tank with? The answer to your question is I have no idea if it will stay sealed in such a fuel soaked, vibrating environment. I personally would not trust it.

J D 822/11/2019 16:28:44
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1317 forum posts
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Den's model supplies Isle of White for a range of traditional model stuff including metal tanks, not used myself but looks good.

Wilco Wingco22/11/2019 16:55:41
178 forum posts
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No Don. It's the low melting point ali rods. Check out the net there are loads of videos showing them being used to repair aluminium drinks cans. Quite large holes can be seen "filled" with little effort and a butane torch. yes

Engine Doctor22/11/2019 17:13:17
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Posted by D for Donald on 22/11/2019 11:31:37:

Thanks Engine Doc. Cant see the pics as I'm not allowed to log in the Medway club site.

What happens when you click on the link ? Its always worked in the past ?

You could try logging onto www.forum.medwaymfc.org.uk  if that works click on 

Ben Buckle designs in traditional models then onto BB Taylor Craft and scroll to bottom of page one .

 

regards

Edited By Engine Doctor on 22/11/2019 17:19:25

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