From: | R Andrew Hayden <rahayden@*****.WEEG.UIOWA.EDU> |
---|---|

Subject: | RE: Suggested Equations |

Date: | Thu, 11 Feb 93 21:52:50 CET |

specifications:

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)

(km/unit)

---------------------------

Using the above equations on a 5,000kg car with a 400npu engine

yields the following results:

Power: 160,000

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.

Power: 360,000

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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