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Old 02-12-2021, 12:26 PM   #231 (permalink)
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another non-retro 100-mpg car

This won't help retro-wise, but the specifications might add some data points you could use in design:
* 1997 Mercedes-Benz, F 300 research vehicle
* The only data will be found in the March, 1997, AUTOMOBILE Magazine, page- 10, by Georg Kacher.
* Cd 0.18
* Af approx. 21.891-sq-ft ( maximum ) [ the cabin is C-Class size ]
* 1760-pounds
* Length- 4495.8 mm
* 1.8-liter, I-4, Diesel TDI, 16-valve, cylinder deactivation at idle
* 110-bhp
* CVT transmission
* 110-mph top speed
* If you GOOGLE the car, it will bring you back to EcoModder.com and an article I shared years ago
* The small photograph ( a single view ) makes body details difficult to discern.
* It looks like the upper grille is faux.
* Original wheel covers are missing?
* Rear skirts missing?
* Camouflaged non-aerodynamic features
* My guess is that, 100-mpg occurred at around 50-mph ( the speed GM chose for their Ultralite 100-mpg figure )
* At 1/2-gallon diesel/ hour, the gross energy input is 3.55445-pounds/ hour, 68,387.615 Btu/ hour, and 26.86- gross chemical horsepower consumed, at the mpg-test velocity.
* From that, the thermal efficiency loss ( BSFC ) would have to be subtracted to arrive at the actual bhp.
* From the bhp, there'd be perhaps a 2.2% energy loss to engine accessories.
* Minus whatever the FWD CVT transaxle efficiency loss imposes.
* The remainder would be the Road Load horsepower, tractive-energy available at the mpg test velocity and test weight ( Mass ) to maintain velocity.
* It looks like the F 300 had about a half-rated power reserve, available for acceleration, and the car was speed-limited with final gearing.

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Last edited by aerohead; 02-12-2021 at 12:27 PM.. Reason: typos
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Old 02-21-2021, 04:37 PM   #232 (permalink)
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2020 - '08 Chevy Tahoe H
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Originally Posted by JulianEdgar View Post
What would it take? To do a good job, and achieve the results you want, probably US$50,000 and 5 years - and that's from a starting point of being very good with your hands and having all the workshop gear and space.

(I base these figures on the real-world construction costs of a - much simpler - Lotus 7 replica.)

I used to think about making my own car (and I have the workshop tools, space and most of the skills) but then I figured a Gen 1 Honda Insight is a far better outcome than I would ever achieve.
by the time 5 years rolls around gas cars will be banned
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Old 02-21-2021, 04:51 PM   #233 (permalink)
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Originally Posted by Tahoe_Hybrid View Post
by the time 5 years rolls around gas cars will be banned
'Sales' of new gas cars. Home builders can probably skate regulations if it comes to that. I am not so optimistic though. We'll be seeing them sold for another decade at least.
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Old 02-21-2021, 09:02 PM   #234 (permalink)
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Originally Posted by redacted
What would it take? To do a good job, and achieve the results you want, probably US$50,000 and 5 years
Back before the last year, there were people who could build a car a year and live off the proceeds. Like Chris Runge, Troy Trepanier, Sam and George Barris.


Cold hearted orb that rules the night, Removes the colours from our sight, Red is grey and yellow white, But we decide which is right, And which is an illusion.
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