04-08-2014, 01:54 PM
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#371 (permalink)
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Master EcoModder
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 Today
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Other popular topics in this forum...
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04-11-2014, 01:37 PM
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#372 (permalink)
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Too busy for gas stations
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Turtle - '92 Honda Civic Vx Team Honda 90 day: 67.09 mpg (US) Rolla - '10 Toyota Corolla Le Beast - '91 Chevy V2500 Bus - '01 VW Eurovan MV Speed - '93 Harley bored and storked Harley w/ turbo/ nitrous 90 day: 53.09 mpg (US) Cal - '68 Ford Mustang GT/CS
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Shooting for 600 miles of range at 65-70 mph out of a vx.
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04-11-2014, 01:45 PM
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#373 (permalink)
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Too busy for gas stations
Join Date: May 2013
Location: The intersection of TN/MS/AL
Posts: 460
Turtle - '92 Honda Civic Vx Team Honda 90 day: 67.09 mpg (US) Rolla - '10 Toyota Corolla Le Beast - '91 Chevy V2500 Bus - '01 VW Eurovan MV Speed - '93 Harley bored and storked Harley w/ turbo/ nitrous 90 day: 53.09 mpg (US) Cal - '68 Ford Mustang GT/CS
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Shooting for 600 miles of range at 65-70 mph out of a vx.
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04-11-2014, 06:04 PM
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#374 (permalink)
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Master EcoModder
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Xke
Quote:
Originally Posted by kach22i
I'm wondering two things right now; is it because of the front mounted radiator on the Jag? Or is this chart inaccurate?
It just don't seem right.
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Hot Rod Magazine estimated the Jag at Cd 0.45 in 1962.'Detail' optimization wouldn't begin until 1966,with Volkswagen.The Jag could be 0.25,looking very much like it does according to Pininfarina and MIRA.
You wouldn't think a Smart Car could be 0.38 for it's length.
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04-12-2014, 01:14 PM
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#375 (permalink)
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Master EcoModder
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lift
Quote:
Originally Posted by kach22i
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Something Goro Tamai mentioned in his book,was that the 'torpedo' form (streamline body of revolution ),in free-flight,generates zero lift.
When it is cut in half to become a half-body,it can be oriented in inclination (rake) so as to produce zero induced drag (zero lift).
With respect to HOT ROD Magazine's comment,cars usually get into when they go sideways at speed,as with Racing Beat's RX-7 which flew at 235-mph.
At 'normal' driving speeds,the half-body (pumpkin seed) is essentially a zero-lift body.It requires no spoilers,as there is zero separation and its associated low pressure occurring anywhere 'over' the body.
Face-on,at zero yaw,pressures around the body are uniform,per location.
Tamai says that a simple spine down the upper center line is all that's necessary to quell any lift in crosswind or gust.
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04-24-2014, 03:19 PM
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#376 (permalink)
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Master EcoModder
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Could be a re-post..............but still cool.
Don-Bur: Aerodynamics
Video in link as well. |
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04-24-2014, 06:18 PM
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#377 (permalink)
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Drive less save more
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BMW i3 in the Wind tunnel
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Save gas
Ride a Mtn bike for errands exercise entertainment and outright fun
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04-24-2014, 08:11 PM
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#378 (permalink)
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Master EcoModder
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If that car was a 4-passenger vehicle with upright seating, it would look much like the Volkhart Sagitta.
Quote:
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Originally Posted by aerohead
'Detail' optimization wouldn't begin until 1966, with Volkswagen.
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[citation needed]
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04-25-2014, 02:45 PM
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#379 (permalink)
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Master EcoModder
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Quote:
Originally Posted by ecomodded
BMW i3 in the Wind tunnel
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I'd have liked to see that smoke on other parts of the body - just as it started getting interesting the movie ends !
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Strayed to the Dark Diesel Side
Last edited by euromodder; 04-25-2014 at 06:22 PM..
Reason: typo
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04-25-2014, 04:54 PM
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#380 (permalink)
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Cyborg ECU
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Way cool discussion of various sensors for measuring drag and downforce on this wind tunnel test:
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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