If the offered motor energy improved in the twenties and 30s and bracing was now not required, the unbraced or cantilever monoplane grew to become the most typical sort of driven form.???? ????? ?? ???? ????? ???? ??? ???? ??? ????? ???????? ????? ?????? ??? ???? ???? ??? ????? ????? ??????? ?? ???? ???? ??? ????? ??? ????? ??? ?? ???? ????? ??????