The abbreviation B/F stands for Blade Fold in the military field, especially in the US. You can find more abbreviations starting with B here. Also take a look at our list with military acronyms.
Rotor Blades That Fold
Blade Fold describes the folding of rotor blades: helicopters on ships fold their blades to save space in the hangar. B/F appears in checklists and technical descriptions of naval helicopters.
Why Folding Is Necessary
An aircraft carrier or frigate has little space: the hangar deck must accommodate several helicopters. Folding blades reduce the footprint dramatically – the difference between fitting three helicopters or five into one hangar.
B/F appears in this meaning mainly in naval aviation documentation. Together with Blade Spread (the unfolding), it belongs to the standard procedures on board – practiced daily, crucial for the operation of ship-based helicopters.
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