Production aircraft also have a tailwheel, Schempp-Hirth air brakes in the wing upper surfaces and a cabin heater fitted as standard. The SF-25E Super-Falke is basically an SF-25C-S with a wing increased in span to 18m (59ft 0.75in) the fuselage aft of the wing has a wider section than that of the C-S to improve airflow at the wing root, and the fairing for the non-retractable monowheel, which is now rubber-sprung as standard, is now larger. Nearly 400 B-Falkes were built before the C-version was released in the early 70s. The maximum all-up weight was also increased to 555kg. The tail unit is of wooden construction and there is a steerable tailwheel dual controls are standard. Another optional extra for the SF-25B is a tow-hitch for winch-launching. Scheibe lowered to wing to the bottom of the fuselage, incorporated supporting wheels under the wings to allow for independent takeoffs. Its powerplant was a 45hp Stamo MS 1500-1 modified Volkswagen 'flat four' engine which also incorporated some Porsche parts this was started on the ground or in the air by a pull-cable starter in the cabin, with an electrical starter available as an optional extra and the fuel capacity was 8.5 Imp gallons. A more powerful engine was fitted, the forward fuselage underside fairing for the fixed monowheel with brake was revised in shape and outrigger stabilising wheels were fitted under each wing, so that the SF-25B was almost a different aeroplane to the Motorfalke, although just as suitable for basic and advanced training. The 1967 SF-25B's span was now 50ft 2.5in and aspect ratio 13.4, compared with the Motorfalke's 54ft 5.5in span and aspect ratio of 16.
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