DIY tank... even if you can't weld

Discussion in 'Motorized Bicycle Welding, Fabrication and Paintin' started by BarelyAWake, Apr 8, 2010.

  1. Dan

    Dan Staff
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    Didn't read your post carfully enough, SB. Cool! this really can be done. I was excited and it's cold in the shop.
     
  2. silverbear

    silverbear The Boy Who Never Grew Up

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    Hey young man, you're the one who brought all this stuff up. Are you trying to contribute to the delinquency of an elder, sir! In some nursing homes that is a capital offense. At a certain age any offense is capital as it at least shows you're still alive... but I'm not that old and feeble, sir! And I have me own projects piled up involving more precious metals such as copper & brass. I leave the aluminum mining to you, sir...

    And no, I don't understand about the cap. Why don't you make one and show me, eh? Heh heh heh...
    SB
     
  3. silverbear

    silverbear The Boy Who Never Grew Up

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    And I would never marry a non aluminum part! Or for that matter an aluminum part. You have some strange ideas, Dan.
    SB
     
  4. Allen_Wrench

    Allen_Wrench Resident Mad Scientist

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    You are correct, SB; I did use Alumaweld to "braze" together my tank. It can be tricky stuff to use though. Yes, you will not want to rush things. Yes, cleanliness on the mating surfaces is next to Godliness with Alumaweld. Follow instructions to the letter and you should be fine. Practice with it until you know its quirks. Oh, with great care, it will bond to brass. That's what I did with my filler neck. I also used a tank liner. Caswell (sp?) I think it was.
     
    #84 Allen_Wrench, Nov 4, 2014
    Last edited: Nov 4, 2014
  5. Allen_Wrench

    Allen_Wrench Resident Mad Scientist

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    Remember: clean the mating surfaces. Down to bare, bright, shiny, clean, unoxidized metal. Oh, and ya gotta keep it that way whilst you braze by scraping gently with the rod as you go.
     
  6. Dan

    Dan Staff
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    LOL, SB. "marry" is a nautical thing. You bend or marry two lines or what ever, together. I was half asleep and forgot to translate into regular, normal people speak.

    What I am gonna try is the treaded short aluminum pipe and cap as a filler and brass fittings and nuts with washers for the petcock. Unless I can find em in alum.

    Truly funny. When you said "contributing to the delinquency of a Senior" Made me think of you and Steve, but as the "bowery boys" https://www.youtube.com/watch?v=pu8cQNLyL_I
     
  7. Dan

    Dan Staff
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    OH! and found my stash of alumiweld rods and stainless brush and drill brush. As soon as I get the plate, will start a tank. Gonna call it a SBBA. Ideh came from your cantinia and this, BA's thread.


    Thanks Allen. Forgot how clean the mating surfaces had to be. (LOL, go ahead, SB)
     
    #87 Dan, Nov 4, 2014
    Last edited: Nov 4, 2014
  8. silverbear

    silverbear The Boy Who Never Grew Up

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    Excellent. And i did remember something. Great to know that it works! Show us a picture, Allen.

    Dan, do a thread when you make your tank. Alumaweld is a whole lot less expensive than a welder which makes tank making more accessible to more builders. I bought my little package/kit at my local tractor supply type of store. I don't remember what it cost, but was less than 20 bucks if I remember right. Glad you posted to the thread, Dan. Now get busy out in your shop and don't forget the camera.
    SB
     
  9. Allen_Wrench

    Allen_Wrench Resident Mad Scientist

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    I have an album with a few build pick on this forum. There may be a few things in there. I'll go look.
     
  10. curtisfox

    curtisfox Well-Known Member

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    I seen that demoed down at the Back to the 50's car show.Awesome! they also said that you could repair a striped hole by putting a bolt in and weld around it and that the new threads would be stronger then the old aluminum.

    That being said i would try a steel pipe threaded nipple and weld around it then you would be able to put a hose barb in for a gas filler. and maybe for the gas line.............Curt
     
  11. Dan

    Dan Staff
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    That is a cool thought, Curtis! Could be dogged down tight and much more stout then an alum. petcock.
     
  12. curtisfox

    curtisfox Well-Known Member

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    Try it on a small scrap and see how it will work.

    That was about half a doz .years ago still have it on shelf, but will use it maybe also for a tank.....LOL..............Curt
     
  13. silverbear

    silverbear The Boy Who Never Grew Up

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    Bumping old threads is sometimes a good thing, eh?
    SB
     
    #93 silverbear, Nov 5, 2014
    Last edited: Nov 15, 2014
  14. Dan

    Dan Staff
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    Big time, SB.

    LOL, "Old thread Wednesday". Every body find an old thread and bump it with a comment or thought and win free well wishes of your forum mates. Not only is there some great stuff but great folks, too.
     
  15. Reinhold

    Reinhold New Member

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    Awesome job on the tank and the tutorial,
     
  16. Ludwig II

    Ludwig II Well-Known Member

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    This thread reminds me that aircraft wings function as tanks by fixing the skin of the wing to the skeleton, and sealing the gaps with either fluid or paste two part sealants.

    These can often be acquired cheaply from aerospace suppliers when close to or after expiry date for aircraft use. There's nothing wrong with the product, but it's just not guaranteed to 50,000 feet and 600mph any more.

    A WORD OF WARNING: ALWAYS ASK FOR HEALTH AND SAFETY SHEETS, AND FOLLOW INSTRUCTIONS. This stuff pays for being supreme as sealant by being toxic until properly mixed.
     
    #96 Ludwig II, Nov 11, 2014
    Last edited: Nov 11, 2014
  17. Dan

    Dan Staff
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    Lud, been thinking about this for years. Like WW2 Allied and Axis (Asian aircraft did not use em) Fuel bladders.

    They collapsed as the fuel emptied lessening the need for venting. Could be fitted into any shape or faux tank. And for those late night rides into the north end of Hartford, won't burst into flames when shot.

    It has been a couple of years but did research it. You can buy the material and make one but surprisingly enough, is pricy. So was gonna experiment on some sort of jogger's or bicyclist's hydration bag. Would come with a "filler" and tubed outlet. And some sort of shutoff.

    Every type of plastic you should not put gas in that I could find, I've put gas in. They have held gas and not broken down. I kept gas in a laundry detergent container for over a year and was fine. Just saying if anyone tries this, make sure gas will not pour on to your very hot engine and exhaust. Makes for an interesting day. LOL, don't ask how I know.

    I made up that last part. (Was in no way "interesting" snork)zpt
     
  18. Ludwig II

    Ludwig II Well-Known Member

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    Bag tanks are one way to do the job. I had thought rather of basic flat metal fabrication and/or folding in straight lines, and using the sealant for the gaps in a rivetted or screwed together tank.

    That said, there was a racing Norton that had a soft soldered tank that lasted ok, so I suppose it's down to how you want to do things.
     
  19. Dan

    Dan Staff
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    Is a cool thought, Lud. I was just extrapolating on it. You come up with some really great stuff and gets me brain going.

    Cool part of this whole interweb thing. (I really hope it catches on) To get to sit and read your thoughts in all but realtime, 4,000 miles away and across an ocean. That and your knowledge of the British and European approaches to all of this stuff. Just uber cool.
     
  20. Ludwig II

    Ludwig II Well-Known Member

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    I'll take the easy route when my Mk2 is being built, but part of me wants to make a built up tank from 2 sheets of aluminium and a sort of bean shaped ring of cast aluminium 2" deep, all stuck together with a 2 part rubber sealant. No bolts, no welds. I just need to find some skyhooks to hang it in mid air in the frame.
     

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