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Posted: 1/6/2006 4:59:43 AM EDT
[Last Edit: 1/6/2006 5:00:03 AM EDT by captainpooby]
Most say that the drivetrain has a 10-15% loss. I say it's a static # (ie: 15 or 20HP) that does not increase as HP is increased.

What say you?
Link Posted: 1/6/2006 5:25:28 AM EDT
Not my field but I would WAG that it is NOT static. As terrain changes and drag due to speed changes, the friction on the drivetrain changes. Therefore the amount of loss changes, IMO.
Link Posted: 1/6/2006 5:36:26 AM EDT

Originally Posted By Nozzleman:
Not my field but I would WAG that it is NOT static. As terrain changes and drag due to speed changes, the friction on the drivetrain changes. Therefore the amount of loss changes, IMO.




Granted, but is the friction increase linear enough to be expressed as a consistent % of HP?
Link Posted: 1/6/2006 6:12:13 AM EDT
[Last Edit: 1/6/2006 6:18:09 AM EDT by Nozzleman]
Again, not my field but my Bosch Automotive Handbook indicates that it is an approximated fixed PERCENT of applied HP (understanding that it takes less HP to go 30MPH than 60). But it is NOT a fixed value of loss as your original question suggests.
Link Posted: 1/6/2006 7:30:17 AM EDT
here is a nifty little article on the subject:

www.dynamometer.fsnet.co.uk/power-losses-flywheel-BHP.htm
Link Posted: 1/6/2006 8:35:26 AM EDT
Good read!
Link Posted: 1/6/2006 8:46:14 AM EDT

Originally Posted By legalese77:
here is a nifty little article on the subject:

www.dynamometer.fsnet.co.uk/power-losses-flywheel-BHP.htm




Perfect! Thanks!


From the article: "...Remember that it is NEVER a percentage.

"


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