Assertion: coaxial rotor | /r/HasProperty | employed
Facets:
value: in order to allow more power
type: PURPOSE
value: in order to allow stability
type: PURPOSE
Source sentences:
text: In order to allow more power and stability at reduced weight, coaxial rotors can be employed, in which each arm has two motors, running in opposite directions which cancels out rotational torque (one facing up and one facing down).