The Encyclopedia of World Aircraft, while not a definitive source, lists the "initial" climb rate at 2697 ft/min ( 822 m/min ), weights of 6305 lbs ( 2860 kg ) empty and max takeoff 8236 lbs ( 3736 kg ). Max speed of 371 mph ( 598 km/h ) @ 6000 m ( 19685 ft ). What weight and power was used to climb? Who knows? It should be possible to extrapolate from known performance of a 109G. See attached calculated performance. Assuming 528 km/h @ sea level ( William Green encyclopedia of fighters ) is achieved with 1120 PS at max takeoff weight, the climb rate of 13.7 m/s is about right with takeoff power ( 1340 PS ) and 11 m/s is about right with climb power ( 1120 PS ).