Search found 265 matches

by EVguru
Wed May 30, 2007 9:15 am
Forum: City El
Topic: Beegees City Els find new homes
Replies: 52
Views: 109979

If it was him, then I did well.

As I recall, I charged him £80 (@ £20 per hour).
by EVguru
Tue May 29, 2007 8:20 am
Forum: City El
Topic: Beegees City Els find new homes
Replies: 52
Views: 109979

His name wasn't Nigel was it buy any chance?


It's so long ago that I simply can't remember.
by EVguru
Mon May 28, 2007 5:19 pm
Forum: Cars,Vans and other road vehicles
Topic: Compressed Air "Batteries"
Replies: 29
Views: 57221

I did the conversion more simply. 1 W/hr = 3600 Joules. But one HUGE error, when the tank is empty it contains no energy! So you have rougly 42 Wh/Kg of total energy and rather less usable energy. By the way. Raising the pressure of a gas by 100 bar would raise it's temperature by some. EIGHT HUNDRE...
by EVguru
Mon May 28, 2007 10:46 am
Forum: Cars,Vans and other road vehicles
Topic: Compressed Air "Batteries"
Replies: 29
Views: 57221

You need to convert to Whr/Kg which is the standard way of expressing energy density for batteries. What battery capacity were you basing your calculations on? You've also touched on another problem with compressed air and that's pressure regulation. The pressure starts off very high and ends up low...
by EVguru
Mon May 28, 2007 9:27 am
Forum: All things battery related
Topic: Batteries with quoted C1 ratings
Replies: 8
Views: 18991

ANOTHER *($%(*@! STUPID WEBSITE WITH A SHOCKWAVE PRESENTATION! When will companies learn? I don't want to download a megabyte of useless &$%* just to view a website, even on broadband. I'm only going to press the 'Skip Intro' button anyway. I use the web to get access to information NOW. At leas...
by EVguru
Mon May 28, 2007 9:07 am
Forum: Cars,Vans and other road vehicles
Topic: Compressed Air "Batteries"
Replies: 29
Views: 57221

I've been involved with EVs for over 12 years and I've got very cynical. I've heard all the 'new' inventions and 'amazing breakthroughs'. Most weren't new and most weren't breakthroughs. I've seen the companies playing the 'grant game' or sucking in venture capital. Some were just conmen. I had a vi...
by EVguru
Sun May 27, 2007 9:28 pm
Forum: All things battery related
Topic: Zele Zagato Batteries
Replies: 19
Views: 41695

Have you seen any of the reveiws of the Zagato Elcar? They were pretty awful vehicles. Even the Sebring Vanguard was considered to be safer, more comfortable and better handling. Collectors vehicle; yes. Everyday trasport; you've got to be dedicated (commited?). Until the advent of the GM Impact (EV...
by EVguru
Sun May 27, 2007 9:01 pm
Forum: Cars,Vans and other road vehicles
Topic: Compressed Air "Batteries"
Replies: 29
Views: 57221

The physics just don't add up P1*V1/T1 = P2*V2/T2 When you compress a gas it gets hot, that's part of the energy you've put into the system. If you allow the gas to cool you've lost that energy. The only way to get any kind of resonable energy density is to use non metalic storage tanks, but there's...
by EVguru
Sun May 27, 2007 8:06 pm
Forum: City El
Topic: Beegees City Els find new homes
Replies: 52
Views: 109979

Some years ago a guy transported a City-el to me all the was from Cornwall. He was selling/servicing them, but neither he or his 'mechanics' could read a circuit diagram. In looking for an electrical problem, they'd actually introduced an extra five faults. It turned out to be a faulty accelerator p...
by EVguru
Sun May 27, 2007 4:28 pm
Forum: Hybrid's Corner
Topic: Hybrids, the debate starts here.
Replies: 42
Views: 204062

No, you can do it with the Curtis. You put another potentiometer in the circuit, in series with the throttle pot and adjust it for the creep speed. You also wire a relay into the brake circuit that shorts that pot out (or both pots) to give you zero speed. You'd have to have your foot on the brake w...

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