What is VLO?
VLO is the Maximum Landing Gear Operating speed. It is the maximum speed at which it is safe to extend or retract the landing gear on a retractable gear helicopter.
It is possible that the retraction and extension speeds may be different. In this case, the speed will be identified as VLO (RET) and VLO (EXT).
It is normally less than Maximum Landing Gear Extended speed (VLE), because the undercarriage doors are more vulnerable to damage when in the operating regime, rather than when they are closed.
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