The Focus Fusion Society Forums Focus Fusion Cafe FF for Jet Engines? Reply To: General thought on old coal mines.

#7067
jamesr
Participant

Breakable wrote: Is it silly me or is the 0.282 kN = 0.282 MW?
Edit:
Boeng output is probably per second
Where FF is per hour, in that case we need ~203 modules with electrical output
or 102 with full output in case efficiency is similar.

1W = 1Nm/s so 0.282MN/s is equivalent to 0.282MW

another way of looking at it is: Power = (force *distance) / time = force *speed

So if we take the maximum speed (rather than the cruising speed) then this should be where the maximum force the engines can produce is just maintaining the speed and not accelerating it.

We have max speed (from the same wiki link above) = mach 0.92 @35000ft = 988km/h = 274m/s
Force = 4*262kN = 1048kN

Therefore Power of 747 at full thrust = 1048000*274 = 287152000W ~300MW

or 60 5MW FF generators!