Help with diagnosing failure

[crayons]

Well my SMRC Trophy race came to a premature end due to the mechanical failure in the video below.

https://youtu.be/U-uP6cdC-ww

It was a strange one, when I fully released the clutch the car would judder violently, with the tach jumping from zero to 4000rpm.

To get back to the pits I slipped the clutch to get enough speed to coast back.

Whats not in the video is that the engine rev'ed freely with the clutch in or when in neutral, which is pointing me towards the clutch/flywheel/gearbox.

Was just wondering if anyone has a guess as to what it could be.

[AK]

my guess would be something very obvious with the clutch when you pull it out
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Impreza Race Car - SLS/SMRC
Mini Race Car - SMRC
911 - 1981 Air Cooled 3.0
500 - 1969 Fiat 500 L
Toureg 262 RLine
Track Scotland

[crayons]

Below is what I found when i took off the gearbox, appears to be some overheating.

[scottish scrutineer]

Looks like very uneven wear on the friction pads. What is the face of the clutch cover like?

Are the input shaft bearings OK?
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Renny
MSA Scrutineer

[David Long]

Judging but the tachometer in the car this is an electrical problem - maybe associated with engine/harness movement
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R600 Dubaru
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PB @ KH
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