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Aerodynamic Flow Resistance of Studebaker Cars

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  • Other: Aerodynamic Flow Resistance of Studebaker Cars

    Anyone have or know the Cd (Coefficient of Drag) values for the Avanti, Hawk, Lark, and 53 Coupe cars. Also need the front end area values (Fa). Test magazines sometimes list this data in their test evalutions. Thanks.
    Start and Stage Your Studebakers

  • #2
    A quote from http://www.carlustblog.com/2010/03/1...wy-coupes.html 1953: "The Starlight and Starliner had light weight (from just under 2,700 pounds for a Champion Deluxe Starlight to a little over 3,100 for a Commander Regal Starliner), and a lower center of gravity and better aerodynamics than other cars. Actually, they're less aerodynamic than you might expect, with a drag coefficient of 0.40--the windshield is rather vertical, and the tail is too low--but given that nearly everything else available at the time was shaped like a streamlined brick with bumpers, the Loewys became the car of choice for stock-bodied salt flat speedsters and such."

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    • #3
      .40 for the 53 coupe. Not as good as a modern sports car. So most likely the Avanti is higher and the Hawk and Lark higher still.
      Start and Stage Your Studebakers

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      • #4
        .40 for the 53 coupe. Not as good as a modern sports car. So most likely the Avanti is higher and the Hawk and Lark higher still.
        Since Cd is mostly based upon frontal area, I'd doubt the '56-61 Hawks were much higher than the '53-55 C/K. The upright windshield does really make the Avanti have a higher drag than it appears it should have.

        One friend who ran a '53 coupe at Bonneville back in the day told me he ran 110 MPH the first year. The second year, swapping the peaked chrome headlight rims for flush rounded rings, removing the front bumper guards, wipers and the two outside mirrors let the car run 3 MPH faster. He loaded the trunk with 500# of sandbags to make the rear lower, thus lowering the angle of the windshield and picked up another 3 MPH.

        The following year, he added moon discs, rear fender skirts, narrowed the front bumper and got another 3 MPH. This was a really wet year on the salt.

        He pulled the car out of storage the next spring and both the front fender seams in front of the door were completely rusted through, as were the front floors. The trunk floor, where he had used sand from the camping area at the bend in the road to fill the bags, was completely rusted out and the gas tank straps were so rusty, the tank fell out as the car was being moved.

        jack vines
        PackardV8

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        • #5
          I only went one year...but I thought that stopping by the "local" pressure washer car wash was a ritual...! Don't even leave town and let the salt do it's job, before getting rid of most of it....!

          We did with the roadster I was with. Spent a few bucks (1983). There was a line of race cars waiting their turn..!

          Mike

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          • #6
            Hi, Mike,

            Yes, I've been to Wendover and seen the lineup at the coin-op car wash and the inch-thick layer of salt on the floor of the bays. But how many coin-op pressure car wash bays were there anywhere in the 1950s? Certainly none in Wendover that he knew about.

            Good clean Studes were worth less than $500 back then. A rusted out one had no value. He just roped the gas tank in, drove it to the scrap yard and got $25 for it.

            jack vines
            Last edited by PackardV8; 01-12-2012, 11:11 AM.
            PackardV8

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            • #7
              The Avanti is .31

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              • #8
                Do you have a source for that .31 Avanti Cd? Why is it lower than the 53 coupe?
                Start and Stage Your Studebakers

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                • #9
                  http://www.automobile-catalog.com/ma...oupe/1969.html
                  Specs of AVANTI II V-8 327, model year 1969, version for North America U.S. with 2-door coupe body type, RWD (rear-wheel drive) and manual 4-speed gearbox. Basic specs and characteristics: petrol (gasoline) engine of 5354 cm3 / 326.7 cui displacement with advertised power 223.5 kW / 300 hp / 304 PS ( SAE gross ) / 5000 and 488 Nm / 360 lb-ft / 3400 of torque. Dimensions: this model outside length is 4890 mm / 192.5 in, it’s 1788 mm / 70.4 in wide, 1372 mm / 54 in high and has wheelbase of 2769 mm / 109 in. The value of a drag coefficient, estimated by a-c, is Cd = 0.45 .

                  Yes there are differences in stance and slope of the original and the Avanti II,,but probably not enough to account for such a huge differeve. But these are ESTIMATED

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                  • #10
                    It came from Raymond Loewy.
                    Originally posted by 11SecAvanti View Post
                    Do you have a source for that .31 Avanti Cd? Why is it lower than the 53 coupe?

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                    • #11
                      Mr. Lowey would certainly know the Cd value. Thanks for the document source. The forward rake on the early Avanti is superior then than the later Avanti II and 53 coupe in show room stance. Interesting. You would think more Salt cars might be making a switch. Any thing on a Lark design or Hawk?
                      Start and Stage Your Studebakers

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                      • #12
                        What about some of the early Road & Track test car evaluations on Studebaker vehicles. Need the Front Area (Fa) on the cars too. Anyone have information on the air resistance of these cars from a magazine source. Did Studebaker do wind tunnel testing?
                        Start and Stage Your Studebakers

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                        • #13
                          In 1962 when Andy and his boys ran the record busting Avanti at the flats they beat the previous record holder who ran with a 428 Pontiac mill........his name was Tommy Tompkins....the Avanti with the slippery shape and smaller front area easily cut through the wind like a hot knife in butter.
                          Originally posted by 11SecAvanti View Post
                          Mr. Lowey would certainly know the Cd value. Thanks for the document source. The forward rake on the early Avanti is superior then than the later Avanti II and 53 coupe in show room stance. Interesting. You would think more Salt cars might be making a switch. Any thing on a Lark design or Hawk?

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                          • #14
                            Googled , and found this :
                            http://www.landracing.com/forum/inde...ic=3558.0;wap2
                            There are other responses there on the subject.
                            Bill H
                            Daytona Beach
                            SDC member since 1970
                            Owner of The Skeeter Hawk .

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                            • #15
                              So a Salt prepared 53 coupe could be as low as .36 Cd and 20 to 21 Fa. It's hard to believe a factory stance 63 Avanit could have a lower Cd of .31 over against a Salt prepared 53 coupe.
                              Start and Stage Your Studebakers

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