Complex sentence: Based on Model 18-07 powered by Pratt & Whitney R-1690-25 Hornet engines; 10 aircraft built, transferred to Royal Air Force as Lodestar IA.
Split into simpler sentences: Based on Model 18-07 powered by Pratt & Whitney R-1690-25 Hornet engines, 10 aircraft built. Transferred to Royal Air Force as Lodestar IA.