To be accurate with the history, by definition a Super Cub does have flaps. There were J3 Cubs built with the enclosed cowl because that was a design improvement that Piper came up with. The enclosed cowl was included on the Super Cub as it had been on all Cub subsequent to the change. So there are J3 Cubs with the enclosed cowl that are otherwise the same as all other J3 Cubs, then there are Super Cubs with the enclosed cowl and changes to the tail and interior. But there are no Super Cubs with the open cowl, at least not as produced by the factory.