Sonar UHM-FD

North's ultra high modulus Foil Drive mast, 25 percent thinner with a 14 percent shorter chord than the AF80 FD, with the motor pod faired into the monocoque 18 cm above the base so the propeller stays submerged for assist yet clear when flying. 80 cm for assisted prone and downwind; needs the Foil Drive kit, sold separately.