Slingsby Falke

In 1970 Slingsby acquired a licence to build the SF 25B as the Type 61A Falke, a side-by-side two-seat dual training monoplane. This first variant was powered by a 45 hp Starck Stamo MS1500 engine and first flew at Wombleton on 8 February 1971. During May 1971 one aircraft was evaluated by the Royal Air Force as the Venture T1 and an order for 15 aircraft followed. The aircraft were to be operated by Volunteer Gliding Schools for basic air cadet training. Following replacement by the Grob Vigilant T1 they were all sold in 1990. ==Variants==

;T61A :Production variant fitted with a Starck Stamo MS1500 engine with manual engine start, 26 built. ;T61B :As T61A but fitted with a Franklin 2A-120-A engine, one built. ;T61C :Production variant fitted with a Starck Stamo MS1500 engine with an electric engine start, 8 built. ;T61D :One T61A refitted with Rollason R.S.1 engine in 1972. ;T61E :Production aircraft for the RAF as Venture T2, 15 built later modified to T61F. ;T61F :Production aircraft for the RAF with electric engine starter as the Venture T2, 15 T61Es modified and 25 built. ;T61G :One aircraft powered by a Limbach SL1700 engine. ;Venture T1 :RAF designation for one T61A bought for evaluation in 1971. ;Venture T2 :RAF designation for production T61E and later T61F aircraft. ==Former operators==

; • Royal Air Force RAF VGS 612 ZA652, ZA653, ZA654 RAF VGS 616 ZA625, ZA630 RAF VGS 642 XZ550 August 1978, XZ563 October 1978, ZA630 March 1980, ZA657, ZA659 replaced XZ653 RAF VGS 644 ZA634 29 March 1980. ==Specifications (T61A)==