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Old 08-04-2018, 02:17 PM   #20 (permalink)
aerohead
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acceleration

I'm still thinking that we need an acceleration calculator.
If you watch 'World's Fastest Indian' you'll see Burt Munro dropping a rotary slide rule computer into his travel bag as he readies himself for the trip to Bonneville.
I suspect that he had the HOT ROD calculator.
To be able to predict your trap speed at the mile and two-mile,the equation must handle:
*total mass
*available horsepower along the total rpm range between shifts
*gearing in all gears
*polar moment of inertia for all rotating masses (gears,shafts,bearings,wheels,tires,etc.)
*rolling force coefficient of the tires (no one has ever published the range of RR which cab occur on the salt,for the range of salt conditions which can exist on a given day
*aerodynamic drag index
*local air density at time of run (you can get this from Rick Gold@ at his racing fuel trailer on race day,with updates every hour or so)
There's a lot of differential equations which must be solved simultaneously to calculate what you could expect.(a graduate student in mathematics would be your friend)
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Last edited by aerohead; 08-04-2018 at 02:18 PM.. Reason: typo
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