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| Type 4 Unleashed |
 Jun 5 2009, 12:47 AM
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#1
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CREATIVE TYPE lV ENGINEERING  Group: Retired Members Posts: 787 Joined: 20-June 04 From: Aliso Viejo, ca Member No.: 2,231 Region Association: None  |
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| jmill |
Jul 23 2009, 07:26 PM
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#2
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Green Hornet Group: Members Posts: 2,449 Joined: 9-May 08 From: Racine, Wisconsin Member No.: 9,038 Region Association: Upper MidWest |
I would think you'd get worse mileage with a heavy flywheel. I thought they were beefy to handle the heat. (IMG:style_emoticons/default/confused24.gif)
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| ArtechnikA |
Jul 23 2009, 07:33 PM
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#3
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
QUOTE(jmill @ Jul 23 2009, 09:26 PM)  I would think you'd get worse mileage with a heavy flywheel. I thought they were beefy to handle the heat. Mostly they're heavy to improve idle and keep idiots who can't handle a clutch from stalling at stoplights. Consider this - when the car is in motion, THE ENTIRE CAR is attached to the rotating mass... There was a guy from Hawaii trying to promote the 'heavy flywheel makes for better mileage' theory about 20 years ago. You can tell how god an idea it is by observing all the 100-lb flywheels on Hondas and such... |
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| Todd Enlund |
Jul 23 2009, 09:50 PM
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#4
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Resident Photoshop Guru Group: Members Posts: 3,251 Joined: 24-August 07 From: Laurelhurst (Portland), Oregon Member No.: 8,032 Region Association: Pacific Northwest |
QUOTE(ArtechnikA @ Jul 23 2009, 05:33 PM) There was a guy from Hawaii trying to promote the 'heavy flywheel makes for better mileage' theory about 20 years ago. You can tell how god an idea it is by observing all the 100-lb flywheels on Hondas and such... Well, there is a tradeoff... acceleration. And a point of diminishing return... which I'm sure is well short of 100lbs. A heavier flywheel will keep the engine speed more constant, which will result in better fuel economy. How much better? I dunno. Probably still depends more on the driver. I know of a guy that put a huge flywheel under his Pinto. He'd spool it up, shut the engine off, and drive home on the flywheel. Regenerative braking put energy back into the flywheel. |
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| ChrisFoley |
Jul 25 2009, 05:08 AM
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#5
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I am Tangerine Racing Group: Members Posts: 7,990 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None 
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QUOTE(Todd Enlund @ Jul 23 2009, 10:50 PM) I know of a guy that put a huge flywheel under his Pinto. He'd spool it up, shut the engine off, and drive home on the flywheel. Regenerative braking put energy back into the flywheel. (IMG:style_emoticons/default/bs.gif) Do you have any idea how much mass would be required to actually accomplish that? The only way to put energy back into the flywheel is to increase its rotational velocity. A rather complex system would be required to transfer braking energy to the flywheel. An engineer friend told me that BMW was trying to develop a flywheel system and killed someone during testing. They didn't have the test cell adequately built to protect people from a runaway flywheel, and something went wrong. If it was a good, safe idea and not too complex it would have already been implemented by a car mfr. |
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| Todd Enlund |
Jul 31 2009, 03:20 PM
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#6
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Resident Photoshop Guru Group: Members Posts: 3,251 Joined: 24-August 07 From: Laurelhurst (Portland), Oregon Member No.: 8,032 Region Association: Pacific Northwest |
QUOTE(Racer Chris @ Jul 25 2009, 03:08 AM) QUOTE(Todd Enlund @ Jul 23 2009, 10:50 PM) I know of a guy that put a huge flywheel under his Pinto. He'd spool it up, shut the engine off, and drive home on the flywheel. Regenerative braking put energy back into the flywheel. (IMG:style_emoticons/default/bs.gif) Do you have any idea how much mass would be required to actually accomplish that? The only way to put energy back into the flywheel is to increase its rotational velocity. A rather complex system would be required to transfer braking energy to the flywheel. May be BS, but I came across it while I was doing research on alternative power in 1982. I have always been skeptical of the regenerative braking claim... as I recall, it was in an issue of Pop Science or some such. Braking energy could be fed back into the flywheel via an electrical motor... not terribly complex. The most complex part of the claim would be converting braking energy into electrical energy. It was a test mule built by a college professor. The article also did not say how far his drive home was... I assume it could be measured in blocks. |
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Posts in this topic
Type 4 Unleashed New Type lV Build Jun 5 2009, 12:47 AM
Type 4 Unleashed :WTF: Jun 5 2009, 12:48 AM johannes :popcorn: Jun 5 2009, 02:36 AM Type 4 Unleashed :WTF: Jul 22 2009, 07:59 PM type2man :popcorn: :popcorn: Keep it comin along, were all... Jul 22 2009, 08:39 PM r_towle Why are the rod bolts welded?
Why are there little... Jul 22 2009, 09:32 PM
Type 4 Unleashed :WTF: Jul 22 2009, 10:13 PM Borderline A 2.6 Ltr will make one hell of a street engine... Jul 22 2009, 10:44 PM Type 4 Unleashed :WTF: Jul 29 2009, 01:52 AM HAM Inc
Why not just degree it and find out for yourself... Jul 23 2009, 08:59 AM Type 4 Unleashed :WTF: Jul 23 2009, 11:18 AM Chris Hamilton I don't quite understand going with the stock ... Jul 23 2009, 12:05 PM Type 4 Unleashed :WTF: Jul 23 2009, 05:42 PM Chris Hamilton I autocross my car and drive it on the freeway. Di... Jul 23 2009, 05:54 PM r_towle
[quote name='Racer Chris' post='1195124' date='Ju... Jul 31 2009, 04:15 PM maf914
I know of a guy that put a huge flywheel under h... Aug 3 2009, 01:54 PM Racer Chris :agree:
By itself the weight of the flywheel has ... Jul 23 2009, 09:49 PM Type 4 Unleashed :WTF: Jul 23 2009, 10:08 PM Jake Raby Light flywheels impact MPG because they require mo... Jul 23 2009, 10:13 PM kwales The heavier flywheel means higher system inertial ... Jul 24 2009, 05:05 PM Chris Hamilton
Hmmm.... that may help explain why there are no ... Jul 24 2009, 05:31 PM r_towle Who cares....
Show more pics of the motor build..... Jul 24 2009, 09:27 PM Type 4 Unleashed :WTF: Jul 31 2009, 02:42 PM Todd Enlund
I found out something interesting today, initial ... Jul 31 2009, 03:23 PM Chris Hamilton Who manufactures those 103s? Jul 31 2009, 02:43 PM Type 4 Unleashed :WTF: Jul 31 2009, 02:52 PM Type 4 Unleashed :WTF: Jul 31 2009, 09:24 PM r_towle looking good.
Can you come up with a safe crank f... Jul 31 2009, 10:42 PM Type 4 Unleashed :WTF: Aug 1 2009, 12:54 AM Chris Hamilton
looking good.
Can you come up with a safe crank ... Aug 3 2009, 01:45 PM |
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