Continued ?? HP Loss from Flywheel to Rear Wheels
08-01-2003, 10:25 PM
#1
Racer
Thread Starter
Continued ?? HP Loss from Flywheel to Rear Wheels
Ok. I have seen the discussions concerning the loss of 10 to 15 percent of the hp at the flywheel through the drivetrain to the rear wheels. I can understand the loss through mechancial inefficiency. It takes a certain amount of hp to turn the mechanicals. However, once the hp debit is paid why would one continue to lose a portion of any added hp? :confused: :confused: :skep:
08-02-2003, 12:35 PM
#2
Safety Car
Re: Continued ?? HP Loss from Flywheel to Rear Wheels (KF9BD)
Ok. I have seen the discussions concerning the loss of 10 to 15 percent of the hp at the flywheel through the drivetrain to the rear wheels. I can understand the loss through mechancial inefficiency. It takes a certain amount of hp to turn the mechanicals. However, once the hp debit is paid why would one continue to lose a portion of any added hp? :confused: :confused: :skep:
08-02-2003, 01:32 PM
#3
Racer
Thread Starter
Re: Continued ?? HP Loss from Flywheel to Rear Wheels (Richin Chicago)
Ok. I can accept that there could be a small increase in friction through additional heat production from the higher HP. However, it doesn't seem reasonable that the percent HP loss would remain constant (10% at 350 HP = 35 HP loss......10% at 400 HP = 40 HP loss). I am not an engineer, but this just doesn't make sense to me.
08-02-2003, 01:54 PM
#4
Drifting
Member Since: Jul 2002
Location: Morgan Hill Ca.
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Re: Continued ?? HP Loss from Flywheel to Rear Wheels (KF9BD)
The answer to your question is what you wrote! Think about it.
10% at 350 is 35, and 10% at 400 is 40! So you went up in HP by 50 and registered a 5 HP additional loss due to friction. Now if you go to 450, you have gone up 100 HP with a 10HP additional loss etc. . Now the real formulae for mass and accel, contains a square function so the rate is in fact nonlinear (which is what is causing you the confusion, cause you logicially think it is) But the percentage thing is "close enough for govt. work.
Jer
10% at 350 is 35, and 10% at 400 is 40! So you went up in HP by 50 and registered a 5 HP additional loss due to friction. Now if you go to 450, you have gone up 100 HP with a 10HP additional loss etc. . Now the real formulae for mass and accel, contains a square function so the rate is in fact nonlinear (which is what is causing you the confusion, cause you logicially think it is) But the percentage thing is "close enough for govt. work.
Jer
08-04-2003, 06:37 PM
#7
Racer
Thread Starter
Re: Continued ?? HP Loss from Flywheel to Rear Wheels (Lenskey)
Yes, it is. I have been a ham, (waiting for salvo of comments.....) since 1990. I was very active in HF and foxhunting initially. Now just mess around with VHF/UHF a little.
08-04-2003, 06:47 PM
#8
Advanced
Member Since: Nov 2002
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Re: Continued ?? HP Loss from Flywheel to Rear Wheels (KF9BD)
Mine is K7YW, 27 years but not to active now, still have the HF set-up and will get on some over the winter. 73 :cheers:
08-04-2003, 07:26 PM
#9
Re: Continued ?? HP Loss from Flywheel to Rear Wheels (KF9BD)
Just as an FYI, the driveline loss on an F Body or Y body car is 12% on a manual car and 18% on an automatic car.
To convert from RWHP to flywheel HP, divide RWHP by .88 (manual car) or .82 (automatic car)
:cheers:
To convert from RWHP to flywheel HP, divide RWHP by .88 (manual car) or .82 (automatic car)
:cheers:
08-04-2003, 08:04 PM
#10
Re: Continued ?? HP Loss from Flywheel to Rear Wheels (poolfanatic)
08-04-2003, 09:48 PM
#12
Racer
Thread Starter
Re: Continued ?? HP Loss from Flywheel to Rear Wheels (blktie8)
Hi K8PX....is seems that there are hams everywhere. That is good to know. Anybody tried to install a mobile VHF/UHF in a vette? That would be a challenge. I guess one could use a marine antenna.
