the beta 100a led to a larger 200a variant (n5000f) that first flew on may 26, 1966, that was intended for commercial use. offered at $20,000 usd. filper company began production of 32 variants with an anticipated delivery date of 1967. the 200a was followed by a turbine-engined 300 variant as well as a four-seat, stretched model 400a and 600a. the first beta 400a (n5003f) with a fuselage stretched by 36 inches, flew on july 13, 1967.