▁Sche ibe ▁SF ▁ 2 5 B ▁Motor ▁gl ider ▁built ▁by ▁Sl ings by ▁S ail plan es . ▁It ▁entered ▁service ▁with ▁the ▁Royal ▁Air ▁Force ▁for ▁air ▁cad et ▁training ▁as ▁the ▁Sl ings by ▁Vent ure . ▁ ▁Development ▁In ▁ 1 9 7 0 ▁Sl ings by ▁acquired ▁a ▁lic ence ▁to ▁build ▁the ▁SF ▁ 2 5 B ▁as ▁the ▁Type ▁ 6 1 A ▁Fal ke , ▁a ▁side - by - side ▁two - se at ▁dual ▁training ▁mon op lane . ▁This ▁first ▁variant ▁was ▁power ed ▁by ▁a ▁ 4 5   hp ▁Star ck ▁St amo ▁MS 1 5 0 0 ▁engine ▁and ▁first ▁fle w ▁at ▁W om ble ton ▁on ▁ 8 ▁February ▁ 1 9 7 1 . ▁During ▁May ▁ 1 9 7 1 ▁one ▁aircraft ▁was ▁evaluated ▁by ▁the ▁Royal ▁Air ▁Force ▁as ▁the ▁Vent ure ▁T 1 ▁and ▁an ▁order ▁for ▁ 1 5 ▁aircraft ▁followed . ▁The ▁aircraft ▁were ▁to ▁be ▁operated ▁by ▁Vol unte er ▁Gl iding ▁School s ▁for ▁basic ▁air ▁cad et ▁training . ▁Following ▁replacement ▁by ▁the ▁Gro b ▁V ig il ant ▁T 1 ▁they ▁were ▁all ▁sold ▁in ▁ 1 9 9 0 . ▁ ▁Vari ants ▁T 6 1 A ▁Production ▁variant ▁fitted ▁with ▁a ▁Star ck ▁St amo ▁MS 1 5 0 0 ▁engine ▁with ▁manual ▁engine ▁start , ▁ 2 6 ▁built . ▁T 6 1 B ▁As ▁T 6 1 A ▁but ▁fitted ▁with ▁a