V12man Posted January 4, 2015 Posted January 4, 2015 That would be cool.I gave much thought to getting a cylinder or compressor type cylinder but that bought me closer to just buying a new compressor. This was a DIY job with what I had lying around, plus it had to be portable. Obviously with certain risks but it did the job it was intended for that week.PM me an address - I will get it on the way soonest - better than trying to send you directions to an ER....
JXV Posted January 5, 2015 Posted January 5, 2015 I do agree with V12man that this contraption is dangerous. The OHS Act has specific clauses relating to pressure vessels and this gadget breaks several of them so you could be held liable if someone follows this idea and gets hurt. I dont seem to have any troubles mounting tubeless tyres with a 4x4 compressor.- I mount the tyre dry without sealant.- remove valve core and hang the wheel vertically. This help to get more air flow and to seat the bead.- connect and start the compressor. If leaking then pull the bead gently towards the rim at the leak location.- you can also use a CO2 bomb to seat the bead- pump until the bead pops or the pressure reaches about 3.5 bar.....then release and let all the air ( CO2 ) out.- pour sealant in via the valve tube- clean off sealant then fit the valve core and pump with air ( not CO2) to riding pressure.- spin wheel to distribute sealant inside.
Duppie Posted January 5, 2015 Posted January 5, 2015 Perhaps still touching on the illegal side, but then rather buy a R100 fire extinguisher, empty contents into your wheelie bin, fit a T-piece so you can use one side for inflation and the other for deflation, no need to drill holes or modify the structure. Even then, as said before, there are regulations about vessels under pressure, and they sure are dangerous. If we can spend 10's of thousands on our bikes, why be unsafe with these kinds of contraptions. Would you use a coke bottle as a helmet? Yet you will pay more for a helmet than a compressor, and dare I say I would rather cycle without a helmet than getting this DIY setup under pressure.
Tankman Posted January 5, 2015 Author Posted January 5, 2015 I do agree with V12man that this contraption is dangerous. The OHS Act has specific clauses relating to pressure vessels and this gadget breaks several of them so you could be held liable if someone follows this idea and gets hurt. I dont seem to have any troubles mounting tubeless tyres with a 4x4 compressor. None of these ideas are original and I am not claiming any ownership to any of these ideas. There are a lot more dumb and stupid ideas people can get on the interwebs, just check youtjoob. Ok, so I probably should not post the blueprints on how to make a fully functional handgun ... but crap like that, our friend Google will inform you, is out there! The intention behind this, was and is not for daily use. I needed it for a week where I didn't have a 4x4, little compressor, electricity or converted tyre and limited packing space. I feel comfortable using it at 6 to 8 bar after doing my own tests and I fully understand the associated risks. I am not telling anyone they MUST build this and use it, merely sharing information on a different way of doing it.
JXV Posted January 5, 2015 Posted January 5, 2015 The intention behind this, was and is not for daily use. I needed it for a week where I didn't have a 4x4, little compressor, electricity or converted tyre and limited packing space. I feel comfortable using it at 6 to 8 bar after doing my own tests and I fully understand the associated risks. Tankman. My safety comments were not intended as a personal thing.....I just felt obliged to warn others who might have less understanding of the risks and get themselves hurt through inappropriate usage. I admire the simplicity and low cost of your idea but please consider adding a small pressure relief valve into a teepiece on the outlet line. A simple prv from a small home compressor set would suffice. These are normally set to activate at around 8 to 9 bar so would suit your purpose and operating pressure. Also place a wet towel or heavy blanket over the coke bottle while in use. This will help to dissipate energy safely in event of a blowout.
karlito Posted January 5, 2015 Posted January 5, 2015 Last time I replace my sealant I managed to get the tires inflated with only a floor pump. Just try and get the tire as close as possible to the rim by hand, the when you start inflating the tire just push down on it gently, it will decrease the volume of the tire and increase the pressure just enough so it will take. You can even tape it flat to the rim in a couple of spots just to get started, the once it takes just remove the tape and finish up. Seriously, as long as you have a decent floor pump you should be good to go.
WrightJnr Posted January 5, 2015 Posted January 5, 2015 Anyone seen anything using a "SodaStream" bottle?
rpedro Posted January 5, 2015 Posted January 5, 2015 Would be cool if I could get a fitting for my small Cadac gas bottle that would allow me to charge and discharge the air.
Muzzarati Posted January 5, 2015 Posted January 5, 2015 I just used a peice of irrigation hose and the soda stream machine...
nickelass Posted January 5, 2015 Posted January 5, 2015 Managed to get a scrap air receiver from a small compressor,motor blown, used a compressor from a scrap fridge, and now I have a small compressor.
Reg Lizard Posted January 5, 2015 Posted January 5, 2015 Ek sal maar n bommetjie koop by CWC vir R10....met my luck blaas ek my hele huis op
Re::Cycling Posted January 5, 2015 Posted January 5, 2015 No Compressor - No problemNo electricity - No problemNo Co2 bombs - No Problem! I built this Air Chamber a while before Epic.Since I was servicing our own bikes, I did not want to go hunting for a compressor (or electricity) when checking Stans at least every second day.Been meaning to share for a while ... so here goes. You will need:Empty Coke bottleTubeless Valve with removable core.3x Hose clampsPump Hose and/or High Pressure hoseAir Compressor Handle (Midas for R60)Brass pipe connection to connect pipe and topcap Have fun! Very cool!
Shebeen Posted January 5, 2015 Posted January 5, 2015 This is a good idea. i reckon a 1.5l coke bottle looks stronger and up to the task.funnily enough i got something similar to one of these for christmas...exactly the same method, it's for kids. found out 6/7bar made it way too unstable on launch as there was just too much of wheelspinning. http://www.experilab.co.za/catalog/index.php?main_page=product_info&cPath=82_129&products_id=354 it goes without saying that this is a product designed for kids...don't remember seeing any massive danger signs on it.http://www.experilab.co.za/catalog/images/ROCKETRACERCAR.jpg And how about http://www.airshotltd.com/these guys really created a whole company over something from an instructables post?!
Shebeen Posted January 5, 2015 Posted January 5, 2015 i think these guys are probably the experts at pressurised PET bottles. http://www.aircommandrockets.com/safety.htm
Recommended Posts
Archived
This topic is now archived and is closed to further replies.