Perspex cylinderhead
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Perspex cylinderhead
Cardiff, UK
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Re: Perspex cylinderhead
The whole film is fascinating, thanks for posting it.
Mark
Mark
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Re: Perspex cylinderhead
Great bit of film especially the fish tank test on the windscreen!
Alan
Alan
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Re: Perspex cylinderhead
Perspex cylinder head - good for checking TDC!
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Re: Perspex cylinderhead
Might be for some, but not really close enough for me! screwdriver through the spark plug hole might be as good and a lot easier.
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Re: Perspex cylinderhead
A screw driver through the spark plug hole will still be not good enough.
There is a lot of crankshaft movement in degrees either side of TDC with the piston crown appearing to stay stationary at assumed TDC.
There is a lot of crankshaft movement in degrees either side of TDC with the piston crown appearing to stay stationary at assumed TDC.
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Re: Perspex cylinderhead
I quite agree. Which is why I indicated that a screwdriver was possibly no better. If I want TDC accurately, it is finding a known position on the up and down strokes with a dial gauge and halving the found distance, between the two markings made on the flywheel circumference.
The same principle applies to timing pendulum oscillations - one always times from the point of maximum velocity, not the less determinate point of change of direction (zero velocity in each of the two directions of travel).
RAB
The same principle applies to timing pendulum oscillations - one always times from the point of maximum velocity, not the less determinate point of change of direction (zero velocity in each of the two directions of travel).
RAB
Re: Perspex cylinderhead
I agree, a screwdriver is not accurate and can only be considered an indication. I read the comment about the Perspex head and TDC, as just a light hearted observation, not to be taken too seriously!
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Re: Perspex cylinderhead
You are absolutely correct, Les It was, indeed, meant as a light hearted comment, if not an outright leg-pull!
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Re: Perspex cylinderhead
Correct!
That’s why there was a load of smileys plastered around (for those that don't notice these things).
That’s why there was a load of smileys plastered around (for those that don't notice these things).