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There are huge numbers of CNG vehicles in places like Argentina - while they're designed for CNG they don't suffer from problems. I have been driven in a converted car, (in Australia) I was told the conversion went well and there were no problems. There were no cold start problems since the fuel...

Joisy, You can't remove a dissolved substance by ordinary centrifuging. What exactly do you want to do? I guess you would like to recover the sodium hydroxide from the emulsion left after washing the diesel. So you add the demulsifier to that and centrifuge out the oil. This should leave you...

Hi Nigel, Here's an alternative way of looking at it. Instantaneous power in a circuit is Volts x Amps. WHen the circuit is resistive Amps always takes the same sign as volts. So plus x plus = plus, and minus x minus = plus. So there is always power being transferred from source to load. When...

For a material of given permeability and a design of given air gap and constant supply frequency then yes I guess that Power = constant x d^2 x l (in other words the magnetic volume). But the formula is largely useless because the 'constant' depends on almost everything associated with the...

Is this a Xe or Xe/Hg lamp? There are both. I suspect the latter have a shorter lifetime and it may be it needs replacing. If this is so do it soon. If they burst (I believe they are at 200 atmospheres inside) you get a hell of a mess.

If you use - to + current flow convention then the handedness rules for magnetic circuits will reverse - you will have the left hand dynamo rule and the right hand motor rule.

That's fine, but what help do you want? Lots of things need to be answered: Isolation of primary to secondary; EMC regulations to be complied with; Environmental requirements commercial/industrial/military/automotive? Size, weight; Target efficiency if this is an issue; Type of control or...

Have you thought of using web enabled interfaces, putting them on the Internet and looking at them with a browser? This seems to be the most inexpensive way of implementing a man machine interface in this century. . . You may care if the casual browser can see what's going on as long as they...

If you have pulled so many bad batteries out of a UPS I would question the UPS charging circuit. Lead acid batteries are very forgiving, even sealed ones, and shouldn't die in quantities like you seem to find. Compare trying to charge a Li-ion battery and see how fussy they are. There aren't...

I came across a commercial (?) system a few years ago which used high frequency AC on long wires to drive remote compact fluoros I think, round your garden. It didn't work at all well over long (20+ yards !!) distances. Just work out the likely standing waves at near megahertz frequencies...

You might get two effects here. One would be removing surface contamination which was tending to short out the winding - this wouldn't be much - and a continued electrical stress could remove it by burning or some form of electrical decomposition which gasified it especially if it was...

You must first define what you mean by explosion proof. Do you mean one that works in a hazardous atmosphere?