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Gooey
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« on: July 28, 2008, 03:11:22 PM » |
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Guys, if i was to buy a compressor, which would you all recommend,brand,size, what to look for??
ks
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*******************************************************If you are going to do it, dont do it with HARVS!!! *************************************************************************************************************************************************************************************************
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PMH
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« Reply #1 on: July 28, 2008, 03:34:03 PM » |
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Guys, if i was to buy a compressor, which would you all recommend,brand,size, what to look for??
ks
I have the coltri sub (badged Nuvair) and the same as JD's but mine has the SS frame and cage his is powder coated steel. does a great job but is heavy can send you pics if you want I mounted mine a a trolley I bought from Bunnings and this works well. others I know have the Bauer Jr 2 and they love it...but it has nor protection cage but is lighter and I think a bit dearer. hope this helps H |
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Gooey
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« Reply #2 on: July 28, 2008, 05:09:24 PM » |
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harvs, are you happy with the size, cf, or would you go larger??
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*******************************************************If you are going to do it, dont do it with HARVS!!! *************************************************************************************************************************************************************************************************
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JD
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« Reply #3 on: July 28, 2008, 06:40:05 PM » |
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How many divers Karl?
It is a trade off between filling and size. Larger compressors are awesome, fill quicker, fill more tanks etc, but are heavy, cost more and really require a trailer. Our 100cf machine is light, about the same size as an engel 40L fridge and can be lifted by yourself (heavy for 1 person though). 2 people at tank can get in 2 dives, with stages if required filling after dive 1 and 2. You need to be organised though. Drop your kit off at the car, connect up, fire up the compressor THEN get out of your gear. We usually walk the kits straight to the car as soon as we get out of the water, fire it up, talk shit, have lunch and they are ready well before our next dive. 3 divers is a push, but can be done.
I like not having to tow a trailer. It fits in a wagon with the dive gear for 2 people, and you can stack on top of it.
In saying this, I like the look of Rob B's new unit!
JD
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Drilling holes is just boring.....
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PMH
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« Reply #4 on: July 28, 2008, 07:02:16 PM » |
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How many divers Karl?
It is a trade off between filling and size. Larger compressors are awesome, fill quicker, fill more tanks etc, but are heavy, cost more and really require a trailer. Our 100cf machine is light, about the same size as an engel 40L fridge and can be lifted by yourself (heavy for 1 person though). 2 people at tank can get in 2 dives, with stages if required filling after dive 1 and 2. You need to be organised though. Drop your kit off at the car, connect up, fire up the compressor THEN get out of your gear. We usually walk the kits straight to the car as soon as we get out of the water, fire it up, talk shit, have lunch and they are ready well before our next dive. 3 divers is a push, but can be done.
I like not having to tow a trailer. It fits in a wagon with the dive gear for 2 people, and you can stack on top of it.
In saying this, I like the look of Rob B's new unit!
JD
what did RB buy??? |
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JD
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« Reply #5 on: July 28, 2008, 08:32:11 PM » |
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A compressor the size of a volkswagon, which will pump a set of 100's in 4 minutes!
JD
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Drilling holes is just boring.....
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PMH
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« Reply #6 on: July 28, 2008, 08:36:47 PM » |
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A compressor the size of a volkswagon, which will pump a set of 100's in 4 minutes!
JD
and the make and model is?  ? |
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JD
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« Reply #7 on: July 28, 2008, 09:31:36 PM » |
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and the make and model is? ? [/quote] NFI. FBC? Rob, care to answer this one? JD |
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Drilling holes is just boring.....
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PMH
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« Reply #8 on: July 29, 2008, 03:07:21 PM » |
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and the make and model is? ? NFI. FBC? Rob, care to answer this one? JD [/quote] I don't think RB is listening |
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Brad
Diver - no manifold but maybe jetfins
Posts: 29
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« Reply #9 on: July 31, 2008, 10:28:21 PM » |
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And perhaps all these compressors should be powered by water?  Does anyone think that people believe that crap?? |
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Craig
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« Reply #10 on: July 31, 2008, 10:33:39 PM » |
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actually that's not a bad idea brad, then make that compressor small & waterproof (except for the inlet of course) then we could just strap that on & go for a dive with endless air! that'd work surely |
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If you're gunna do it right stop crapping on & bloody-well get on with it
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Brad
Diver - no manifold but maybe jetfins
Posts: 29
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« Reply #11 on: July 31, 2008, 10:38:49 PM » |
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Yeah, and then capture the exhaust of the compressor, and convert it back to water so the net result on the water level of the cave is neutral. all without costing anything for fuel.
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JD
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« Reply #12 on: August 01, 2008, 09:04:17 PM » |
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Years ago I had a customer who ran his Sigma on water. He was a bit of a nutty professor type, white hair, untrimmed white beard and wore silly hats. He rode one of those bycicles where you lay down, sort of recline in a seat and the pedals are in front of you. Of course he had the customary orange flag on a pole....
Anyway, he had a 20L container of water in the back of the wagon, with a heat exchanger under the bonnet, with a vortex thingy for inducing the vapour into the engine. He was getting some enormous economy, in the line of 1500-2000km from a tank of petrol. The problem was if he added more water the combustion temperatures dropped so much he would not get proper combustion, so he needed the petrol to maintain heat in the engine. It was pretty ingenious as he had a closed loop analyser on it to monitor the exhaust, and could adjust the mix electronically, ie more petrol on uphill runs, and lean the petrol right down on coast. He was given 2 V6 engines from Mitsubishi to do research on, and they helped him out with any parts he needed. Obviously it never really made it, otherwise we would all have water containers in the back of our cars....
I have seen it done, but I dont think it has much commercial potential.
JD
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Drilling holes is just boring.....
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Craig
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« Reply #13 on: August 01, 2008, 10:33:31 PM » |
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it's called a flux capacitor & he was killed before he could make his research public...  |
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If you're gunna do it right stop crapping on & bloody-well get on with it
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Ian T
Guest
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« Reply #14 on: August 02, 2008, 01:37:17 PM » |
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Water induction into jet engines was a common technique to product greater thrust ( AV-8B's (Harriers) do it actually). The water is sprayed as a vapour into the ingested air stream, reducing the temperature of the inlet air, increasing density and hence producing more thrust. The water expands into steam during the combustion cycle, so no residual water. The problem with this for aircraft is you firstly have to carry this extra weight off the ground, and the performance increase is negated by the additional weight ( of both the water and the ingestion system).
This is a very different concept though to hydrolising water to produce hydrogen, and combusting the hydrogen and oxygen. The water atom is not split during the combustion cycle.
Fuel has one of the highest calorific values of any fluid that we currently have access to. (calorific value is the amount of thermal energy that can be extracted from a volume of the fluid ). This makes it a very efficient energy source to carrry and use. However, it is a combustion cycle that is used to extract this energy, and not atomic division.
Interesting stuff though.
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