G'day folks,
The last thing we want here is to promote myth making.
I do concur.
Grumpy - the most senior engineer to have appeared on these forums -
dispelled the myth of horizontal versus sloper.
How any engine - in any configuration - avoids vibration must go to design.
Slopers are not inherently more vibration free than uprights.
For sure.
Simple test: rotate an upright 45 degree and note what happens.
Rotate a sloper to upright and not what happens.
Rotate a vertical shaft engine 45 degree and note what happens.
From what Grumpy told me - zilch!
The vibration characteristics stay with the particular design; not its orientation.
Umm, to some extent. It's necessary to take a 'vector analysis engineering' approach here, to accurately visualise the
directional nature of the vibrational 'pulses'.
Yes; in this case derived from Phil Irving's books 'Motorcycle Engineering' and 'Tuning for Speed' - the sections on engine balancing.
He says that it's inherently not possible to achieve 'perfect balance' in a single cylinder engine of
any configuration.
I'm sure you'd agree that Phil really did 'know his onions' in this field.
