01-13-2012, 01:32 PM
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#1 (permalink)
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EV test pilot
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HP required for "typical" vehicle on flat at 55mph?
Sorry guys, I'm just blanking on this one.
Can anyone help me figure out how many horsepower are required for a "typical" (not-aeromodded, not stripped) vehicle to cruise down the freeway at 55 mph?
I'm interested in the numbers for a Chevy S10 pickup truck or Subaru Outback stationwagon.
I'm sure somebody has a link to a good horsepower/weight/size calculator somewhere, I just can't seem to find it.
Thanks in advance.
-Ben
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01-13-2012, 01:34 PM
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#2 (permalink)
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Administrator
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01-13-2012, 01:48 PM
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#3 (permalink)
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EV test pilot
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Doh! Right here on Ecomodder. Duh. Told you my brain wasn't working.
Now since that calculator requires a bunch of information.....
How do I enter info in there on a vehicle I don't have? Does anyone know of a listing anywhere of all that data for various makes and models?
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01-13-2012, 01:55 PM
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#4 (permalink)
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Administrator
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Its best to start with the vehicle coefficient of drag list. That'll give you frontal area and cd for a lot of vehicles, but not all. You still have to google for a vehicle's weight.
For other vehicles not on the list I like to use wikipedia to get the vehicle dimensions. H x W x .84 is the formula used for frontal area. Then you just have to google for a vehicle's cd and weight. |
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01-13-2012, 02:35 PM
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#5 (permalink)
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Master EcoModder
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For a 1994-2004 S-10 Extended cab, The calculator shows 15.64hp to go 55mph.
THis is based off a .45Cd, Frontal area of 24.37sqft, and 3081lb curb weight
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01-13-2012, 03:03 PM
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#6 (permalink)
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Eco-ventor
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I hear 1000A DC motor controllers can give off toxic fumes that affect your brain when you destroy them.
__________________
2016: 128.75L for 1875.00km => 6.87L/100km (34.3MPG US)
2017: 209.14L for 4244.00km => 4.93L/100km (47.7MPG US)
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01-13-2012, 03:07 PM
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#7 (permalink)
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EV test pilot
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Quote:
Originally Posted by jakobnev
I hear 1000A DC motor controllers can give off toxic fumes that affect your brain when you destroy them.
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Ah yes, I had the fire extinguisher with but no SCUBA......
Note to self for next time. |
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01-13-2012, 03:07 PM
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#8 (permalink)
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EcoModding Apprentice
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Remember, the results from those calcs are WHEEL HP (after driveline losses) at whatever RPM you turn in top gear at 55mph.
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01-13-2012, 04:49 PM
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#9 (permalink)
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Master EcoModder
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that weight seems pretty light to me. but maybe......
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01-13-2012, 05:52 PM
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#10 (permalink)
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Master EcoModder
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Looks like 9.83 HP estimate
MPH Total HP AERO HP RollingHP MPG
55 9.83 7.68 2.15 52.63
Variables for these results:
Vehicle weight: 1496.9 kg / 3300 lbs
Crr: .015
Cd: .40
A: 2.2 m2 / 24 ft2
Fuel energy density (Wh/US gal.): 33557
Engine efficiency: .22
Drivetrain efficiency: .95
Parasitic overhead (Watts): 1800
rho: 1.22 kg/m3
Last edited by redyaris; 01-13-2012 at 05:58 PM..
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