Assertion: fuel cell's power | /r/CapableOf | use dynamometer
Facets:
value: to measure torque
type: PURPOSE
value: to measure rotational speed
type: PURPOSE
Source sentences:
text: The actual useful power of any traction engine can be calculated using a dynamometer to measure torque and rotational speed, with peak power sustained when the transmission and/or operator keeps the product of torque and rotational speed maximised.