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The thrust from the turbine drives a power take off turbine that drives a shaft. This feeds power to the diff via a clutch. Thats why they had to start the thing with the back wheels off the ground to let it spool up. Helicopters drive the rotors the same way.
He was saying it was direct drive but reckoned it would have been better with a 2 or 3 speed trans so the gas turbine could stay spooled up. They were keeping turbine speeds up by bleeding off pressure via a waste gate.
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Mike Murphy
Melbourne Australia
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