|From:||R Andrew Hayden <rahayden@*****.WEEG.UIOWA.EDU>|
|Subject:||RE: Suggested Equations|
|Date:||Thu, 11 Feb 93 21:52:50 CET|
1) Engine Power = Engine Size (NPUs) ^2
# First, the idea of 'kgmph' is incompatible with shadowrun,
which is a purely metric system. Furthermore, using
'kg-km' or anything like that could get complicated as we
try to balance everything out. What I would say is just us
'Engine Power' with no unit of measure. Nice and simple
# Second, I think that equation will work, though.
# Third, this does not properly differentiate between gas and
electric engines. How about this:
Gas: Power = NPU^2
Elec: Power = (NPU^2) * .85
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.
3) Redline Speed = Cruising Speed * 2
# Nice and simple
4) Economy = no suggestion
# how about something like this:
Economy (km/liter) = Power / (2 * Weight)
Using the above equations on a 5,000kg car with a 400npu engine
yields the following results:
Cruising: 32 km/hr
Redline: 64 km/hr
Economy: 16 km/liter
Obviously, this car is very underpowered, as is shown by its
cruising speed. So lets take the same car, and put in a larger
engine. Let's pretend we are taking stuff out so the weight is
exactly 5,000 in the end. We'll throw in a 600npu engine.
Cruising: 72 km/hr
Redline: 144 km/hr
Economy: 36 km/liter
Hmm, I immediately noticed that with a larger engine, our economy
goes up. I don't know if that is accurate, per se.
Also, a 72 km/hr cruising speed is kinda slow, as 100 km/hr is
roughly equal to 60 mph or so. I don't have the chassis tables in
front of me, though, so I don't know if that is realistic
considering the weight being moved.
The last thing we have to come up with is how to compute
acceleration. I'm at a loss here. Suggestions?
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