Armstrong Pump Foil Range (APF) HydrofoilThe new Armstrong Pump Foil (APF) redefines pump foiling potential with ultra low stall speeds, incredible stability and high efficiency to go further with less effort than ever. Designed in collaboration with career aerospace engineer Chris Porter of Crisp stabilisers, the APF is easy to fly with ultra low stall speeds and excellent pitch stability for an efficient pump cadence. A straight leading edge and specially tuned foil section minimise
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