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From: ArkAngel <DUNN@******.BITNET>
Subject: RE:Engine formulas...
Date: Thu, 11 Feb 93 18:22:00 EST
>From: R Andrew Hayden <rahayden@*****.WEEG.UIOWA.EDU>
>1) Engine Power = Engine Size (NPUs) ^2
>Gas: Power = NPU^2
>Elec: Power = (NPU^2) * .85
Well, I designed the formula with MPH more or less in mind, this could
be why you're getting underpowered cars... Perhaps if you multiplied the NPU^2
by about 1.5 afterwards the numbers would balance better (sorry, I'm terrible
with KM to Miles ratios--anybody wanna give the correct ratio here?)
>2) Cruising Speed = Vehicle Weight/Engine Power
># I think you have this backwards. Unless the engine power
> was dramatically less than the weight of the vehicle, you
> would have a speed of <1. Instead use Power/Weight.
Thanks for catching that one... oops

>4) Economy = no suggestion
># how about something like this:
> Economy (km/liter) = Power / (2 * Weight)
> (km/unit)
Hmmm... the coment you made later about this giving you better economy with a
bigger engine probably reflects a flaw in this equation... sinec we're looking
for a km/unit ration we've got kg*kmph on top and just kg on the bottom, thus
right now, the measurement of economy is in km/hour... I don't think that's
quite the ratio we want just yet ;) So, that means we're missing something on
the bottom, probably liters/mile... I'd suggest multiplying by say engine size
on the bottom, and that should yield a better number...
thus the formula changes to:

Economy = Power/((2*Weight)*EngineNPU))

I think that might work better...

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