Re: [Opengate-devel] engine power input

[Christoph B. <eg...@gm...>]

Am Mittwoch, den 21.03.2007, 18:48 +0100 schrieb Gary Luck:
> Hi folks,
> I noticed that there are no values given in Jossh for the power input of engines. I opened Jumpgate and 
> set up a basic ship with 2 Money engines. The ship configuration screen told me that thouse 2 engines 
> need 1895 kilowatts (wich equates to 947.5 kilowatts each).
> 
> After doing some rough calculations I noticed that if you multiply the efficiency (80%) with the 
> required power input (0.8 * 947,5 kilowatts = 758 kilowatts) you will recieve the maximum thrust (the 
> Money engine has a maxium thrust of 758 kilonewton). So I guess that the mightygames team defined that 1 
> Watt power input (at an efficiency of 100%) results in 1 newton thrust.
> 
> Some guy from the blenderartists forum told me that you can't calculate the power input from the thrust 
> (which is nothing else but the power output). "It would totally depend of the form of generation, 
> conversion, and propulsion. You can't calculate the gravimetric results without total detail of those 
> three elements, and then you've gotto factor in local gravimetric resistance."
> 
> So that's why I guess that the mightygames team defined something. I also noticed that if we use the 
> definition 1 watt input => 1 newton output we would recieve a power input of 931 kilowatts for the 
> s-e-15 engine. The ship configuration screen of jumpgate tells me that it takes 943 kilowatts to power 
> the s-e-15 engine at maxium thrust.
> 
> What is your prefered solution?
> 
> Either we can ignore thouse slight differences and take the real values for the power input which we 
> have calculated base on the definition 1 watt input => 1 newton output or we have to recalculate all 
> efficiency values because they are obviously wrong in Jossh.

Puh. Difficult question. I would stick with "being as close as possible to Jumpgate with the least amount
of work". So if you can calculate the value (almost) I won't force you to test every single enginge and
write down the data.
I'd say: Go for whatever you like :-)