HA.
The CVTs used in cars today in most cases is LITERALLY a snowmobile belt drive
system. Good for up to maybe 200hp but shrapnel beyond that.
I wonder if you could make a hydraulic drive system that would survive it?
Otherwise its a good place for a series hybrid...
-Curt
From: Curly McLain via Mercedes <mercedes@okiebenz.com>
To: Mercedes Discussion List <mercedes@okiebenz.com>
Cc: Curly McLain <126die...@gmail.com>
Sent: Saturday, September 12, 2015 7:55 PM
Subject: Re: [MBZ] Turbines for power and heat [was Re: The demise pf Pruis
h*ters]
Seems like a good application for a CVT.
>GMANN: Some years ago, I was involved in the design and build of a Allison 250
>turbine engine sprint car [dirt track]. The engine used for that car came
>from the residual engines from the Indy car. It came as a pallet of parts
>and tech manuals.
>
>The car was configured as a 4 wheel drive sprint car, turbine engine
>powered. Double radical design.
>
>It ran successfully in competition with way more power than it needed,
>however because it was built around a direct drive connection [at the
>owners insistence despite my strong advice otherwise] the car was simply
>not manageable in the short dirt track.
>To make the corners at full power and speed off the straights it required
>massive brakes to slow down against the engine at peak power..
>
>After only a couple laps, the massive 4 wheel double caliper brakes were
>glowing red hot... a couple more laps and the tires caught on fire from
>brake heat.. serious energy management problem, to say the least.
>
>Several fixes were tried, all within the owners [check writers] fixation
>with direct drive coupling.. None worked... other than spend more of the
>owners money.
>
>I came forward with a modification of the compressor surge valve which
>would dump compressor air, connected to a foot throttle.. so the driver
>controlled not the fuel but the air available for combustion. This would
>allow a needed reduction of power going into the turns with an almost
>instant return to full power upon closing the modified surge valve.
>Since this device played on the combustion can pressure wave front, if not
>handled carefully, it could cause the engine to flame out, or to "Surge",
>which is a condition where the flame front travels from the burner can
>forward in the flow path and out through the compressor section ..
>potentially with violence enough to destroy the compressor blades, so
>driver has to know what to do to manage the engine.
>
>The race season finished while the modification was being worked out, the
>owner/check writer decided he had lost enough money pursuing his "pet car"
>and the sponsors weren't impressed with it's poor showing on the circuit,
>thus it got rolled into the back of the warehouse to be sold off for race
>parts and who knows where it is now..
>
>Power to weight ratio was really fantastic. The engine put out a constant
>1,200 HP in a car that weighed 1,400 lbs, so the potential was there.. just
>couldn't manage the power in the environment effectively.
>
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