Originally serial number A19/1 with two 300 hp Wright Whirlwind J-9. To Canada Dec 1930 as CF-ARB. Back to SARO Jan 1934 back to G-ABCJ. Modified with two 16 cylinder H air cooled Napier Rapier IV, serial number A19/1A. Deflector added under engines and above wing to fix center section stall which resulted in elevator control problems. This modification was added to following models