Martin flies an Extra 300S .

The Extra 300S is a single-seat aerobatic monoplane build for Unlimited Category Competition. It was designed and build by Walter Extra, an award-winning German aerobatic pilot. The Extra 300S has a welded steel tube fuselage covered in aluminium and fabric. The  wing has a carbon fiber composite spar and carbon composite skins. A symmetrical airfoil, mounted with a zero angle of incidence, provides equal performance in both upright and inverted flight.  The engine is a fuel-injected Lycoming AEIO-540 which produces 300 horsepower (224 kW). The Extra 300S has G limits of +10 to -10 G`s with a ultimate load of more than 24 G`s. Its rollrates of around 400 degrees per second are incredible.