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Skriven 2009-06-30 14:22:31 av Roy Witt (1:397/22)
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Ärende: The Hydrogen Power Details
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By MARK VAUGHN

Six years after he got the idea and bought the streamliner, Jesse James
has set the world record for hydrogen-powered speed.

Late afternoon on June 16, James flew across the windswept dust of El
Mirage dry lake bed in the California desert and tripped the lights at
199.712 mph. That was 14 mph faster than the previous record of 185 mph,
set in Germany by BMW in its hydrogen-powered H2H. (ok, France)

"This, I honestly believe, is world-changing," James said of the
emissions-free race car. "We can't rely on gasoline forever. I'm paying it
forward."

The whole deal was for the season-ending episode of James's TV show, Jesse
James is a Dead Man. The episode is set to air at 10 p.m. Eastern on Aug.
9 on the Spike TV network.

The land-speed car also shows that alternative-fuel cars can have a
popular appeal, James said.

"We don't have to be dorks to make things environmentally friendly."

But it's not that simple. You can't just strap a bigger blower onto a
bigger engine and get speed. The engine itself took three years of
development to make power on hydrogen. Converting the 572-cubic-inch
Chevrolet crate motor to hydrogen was first attempted by Quantum
Technologies, which then handed the project over to Detroit engine deity
Kurt Urban. The problem was heat.

"As you make power, you make heat," Urban said.

All engines do that, of course, but with hydrogen, you have significant
obstacles to overcome. Urban invented all kinds of ways to deal with the
heat.

The biggest and potentially most-lethal problem was that the hydrogen
would ignite back into the intake runners. So Urban used longer intake
runners that also had a low profile to fit under the hood. The runners he
chose are the same ones used on Can-Am race cars back in the day. Then he
introduced a means to inject water into the runners as needed to prevent
detonation of the fuel there. Water shoots into the twin turbochargers to
cool them, too.

A large tank packed with ice and water sits inside the car's nose. When
the engine temperature rises above 170 degrees, the ice water flows
through the block to cool it down. With runs that last only a minute or
two, you have options you wouldn't have on a regular car.

Twenty-four injectors spray fuel into the eight cylinders. A normal V8
would have eight. The car carries three, 5,000-psi tanks of gaseous
hydrogen.

"The engineers said it couldn't go over 500 hp," said Urban. "This one
makes 740. Sometimes engineers are too smart."

James made a trial run on the abandoned runways of El Toro before coming
to El Mirage.

"Just to make sure the transmission and everything worked," said Urban.

It did, but, as any land-speed racer or any racer with a new car will tell
you, nothing ever goes right the first time.

James aborted his first run at El Mirage when dust immediately filled the
cockpit, blinding him. The crew, led by revered land-speed legend Mike
Cook, quickly sealed up the cockpit and any other potential entry point
for dust. Instead of anything high-tech, they used cardboard and duct
tape. To block a large opening above the parachute tubes, they stuffed in
a pillow.

A test run showed that there was still too much dust. So the crew used
more cardboard and more duct tape.

Another test run showed that the dust was tolerable, but the engine wasn't
making the power. So the Cook family, Cook friends, SCTA members and the
heavily tattooed West Coast Chopper team opened up the air intake using
tin snips, crescent wrenches, hammers, wooden blocks and, finally, a
baseball bat.

As daylight ran out, James flew through the timing lights of the SCTA
course at 199 mph.

"Not bad for a bunch of guys with no college degrees, huh?" said James of
his West Coast Choppers crew.

And even when two members of the team sheepishly admitted that they indeed
had college degrees, it was still quite an accomplishment.

AutoWeek | Updated: 06/17/09, 5:28 pm et

Article URL: http://tinyurl.com/nlrzd8

If you are not getting AutoWeek magazine, like those guys in Europe,
you're not getting the whole story.

                R\%/itt

Joy lives in the fight, in the attempt, in the suffering involved, not in
the victory itself.

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