Landracing Forum
Tech Information => Technical Discussion => Topic started by: fastlammy on April 21, 2013, 04:42:06 PM
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Hi all
Was looking on eBay the other night and found this drop tank which i think i could use for my Lambretta powered streamliner, has any one had a look at one of these? im just a little unsure how suitable it would be for my application, and its always difficult when you are on the other side if the world.
http://www.ebay.com/itm/300893286116?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
Thanks for your help
Nicholai
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IMO it would be fine integrity wise but to cut Kevlar is a nightmare. You'll end up hating the tank.
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Maybe its just me but a 24" od sounds awfully small. You planning on being able to fit yourself inside of there with whatever chassis you plan on making?
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Nathan, you are right, it would be really small for you :evil: but you are used to larger cars. I know you sat it the lakester when you were a kid, the drivers compartment is 19 x 15... of course it is square, not round. Yes it will be a tight fit, but a lot of the bike liners are quite small... it will take a lot of planning,
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Thanks for your replys, i was worried the kevlar could be a problem, after finding this on eBay i thought it could be a good way of speeding thinks up and save me having to build a body, and having looked at some photos of the old Manning/Rayborn liner i thought it would be possible with my small wheel size.
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Maybe its just me but a 24" od sounds awfully small. You planning on being able to fit yourself inside of there with whatever chassis you plan on making?
The Benham tank #34 was a 24" so it can be done.
I have some new aluminum 25's if you're looking for a small tank.
ps, The composite tanks are really thick too so you'd loose a couple of inches once you get inside.
Sid.
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pm sent
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I've taken a look at this tank and think I could us it for a staring base for a mold. The fact that it is close to the dimensions I'm looking for on my build.
I'm just not sure how I'm going to get the thing to my shop, if I was to buy it.
A road trip to Miami would take a while.
Intriguing at least.
I took a long look at the Manning/Rayborn Streamliner in the Indianapolis Racing Museum, and you're right it is small, very small.
Rouse
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As Tauruck said, cutting kevlar is a true pain in the a$$ and also as this was a fuel tank there will be bulk heads and mounting structure inside the tank all that needs to be cut and is also probably kevlar. Using it for a male mold might be a thought but it is not an especially aero shape as it looks like the front and the back are pretty much the same shape, not optimum. Don't waste your time or effort.
Rex
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I agree with Rex, it's not worth phuking with. I just had a similar conversation with fastlammy on the whole tank thing. It might look like a short cut from here but it's not the way to go. You really don't want to resign your self to trying to build inside something. It's better to design your bike then design a body to cover it.
Sid.
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Thanks, Just like most racers, I thought I found a little bit of a short cut, but as usual that doesn't seem to be the case.
One of these days I simply learn, to just go ahead and start from scratch and get done with it.
Rouse
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I sort of like being the one to ask the dumb questions, so...
Does it need a frame? Does "recovered and re-used" mean that they survived non-parachuted landings?
Or is the short answer simply "... rules..."?
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Thanks for your replys, i was worried the kevlar could be a problem, after finding this on eBay i thought it could be a good way of speeding thinks up and save me having to build a body, and having looked at some photos of the old Manning/Rayborn liner i thought it would be possible with my small wheel size.
What small wheel size?
You're not planning on running 10" s are you
G
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Thanks for your replys, i was worried the kevlar could be a problem, after finding this on eBay i thought it could be a good way of speeding thinks up and save me having to build a body, and having looked at some photos of the old Manning/Rayborn liner i thought it would be possible with my small wheel size.
What small wheel size?
You're not planning on running 10" s are you
G
Yes i am.
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Hard to get a 10" tyre with a decent speed rating
Do you have a brand in mind?
G
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currently have these
(http://i1171.photobucket.com/albums/r542/nicholai-stent/2013-02-05180639_zps8c57261f.jpg) (http://s1171.photobucket.com/user/nicholai-stent/media/2013-02-05180639_zps8c57261f.jpg.html)
(http://i1171.photobucket.com/albums/r542/nicholai-stent/2013-02-05180615_zpscb6bc240.jpg) (http://s1171.photobucket.com/user/nicholai-stent/media/2013-02-05180615_zpscb6bc240.jpg.html)
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Fastlammy is that one new or has it endured a bunch of landings before it became unsuitable for an airplane? I would caution you against running used ones since you will have no idea what they have been through.
We have run our airplane fronts to 246 without issue, they were new and have been shaved...
unshaved versions in the past have run in the 220s with no problem. If you look at the tire on the front left you will see it has some fabric showing, it has looked like that for the last 12 years, it is a fabric tread tire, we shaved the other one first, then shaved this one to the same number. A couple of layers of the fabric appeared on this one... go figure. The tires run cool, we do not run them at max rated pressure, we run 150 psi in them with a tube. When you shave, just go to the bottom of the grooves.
As a side note, we ran over a sparkplug years ago and punctured a tire, all the air was out, noticed it after a 220+ run when we were loading the car on the trailer and wiping salt off the tires, don't know when in the run it happened...
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Thanks Stainless
Yes these rims and tires are used, i got the tires mainly so i could have a go mounting them and see what we need to do to shave them,can buy the tires new locally for about $300 each, these Michelin tires run 70psi and were the front tires off a small passenger jet.
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Yokahama make a 10" H rated tire. Its a car tire and a bit on the wide side. I run one on the front wheel of my sidecar.
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FastL, check ebay... undocumented new tires end up there at times... I would suggest not trusting your life to a formerly abused tire. A used tire is useful for shaving practice and fit checks.
If it is not good enough to run under an airplane, it is not good enough to run on your vehicle. :cheers:
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Nathan, you are right, it would be really small for you :evil: but you are used to larger cars. I know you sat it the lakester when you were a kid, the drivers compartment is 19 x 15... of course it is square, not round. Yes it will be a tight fit, but a lot of the bike liners are quite small... it will take a lot of planning,
Ha, yes it'd be small for me but most things are. But seriously, a 24" od starts out ok but this kevlar tank is probably what, at least an inch thick? That's gives you a 22" id then put your 1.5" od cage structure in there and you're down to 19". My hips fit snuggly into a 17" wide seat without a fire suit on. I could probably put my lower half into the Bockscar but I'd have to rip off both my arms if I wanted to get in all the way. Can't drive too well without arms.
Now if you had a 24" od body that was made out of 16 gauge sheet aluminum I think you'd have plenty of room and one could probably get in and out of said body without having to remove appendages.