Editing Engine (section)

====Commercial engines====
The minimum size for commercial engines is 25 [[HS]] (= 1250 tons) and the power modifier needs to be -50% (or less). If you have, say, 60% fuel consumption rate researched, it looks like this:

<code>Commercial Magneto-plasma Drive  EP200.00<br>
Engine Power 200.00      Fuel Use Per Hour 13.42 Litres<br>
Fuel Consumption per Engine Power Hour 0.067 Litres <br>
Size 25 HS  (1,250 tons)      HTK 5<br>
Thermal Signature 200.0      Explosion Chance 5%      Max Explosion Size 50<br>
Cost 50.0000      Crew 12<br>
Commercial Engine<br>
Development Cost 500 RP<br>
Materials Required<br>
Gallicite  50.0000</code>

Compare this to an engine that's twice the size (50 HS = 2500 tons) and twice the power:

<code>Commercial Magneto-plasma Drive  EP400.00<br>
Engine Power 400.00      Fuel Use Per Hour 18.97 Litres<br>
Fuel Consumption per Engine Power Hour 0.047 Litres <br>
Size 50 HS  (2,500 tons)      HTK 7<br>
Thermal Signature 400.0      Explosion Chance 5%      Max Explosion Size 100<br>
Cost 100.0000      Crew 25<br>
Commercial Engine<br>
Development Cost 707 RP<br>
Materials Required<br>
Gallicite  100.0000</code>

Fuel use is only 19 litres per hour, compared to 27 if you had installed two 200EP engines instead, for the same power output. Development (i.e. research) cost to design this engine is higher, though. Size 50 is the maximum in VB6, but you can keep increasing the size further in C#, up to a maximum of 20,000 tons (400 HS), with suitable research into Maximum Engine Size techs.