Espin Hardwick persuaded Fred Slingsby to build a two-seat version of the Falcon.

The increased span wings were attached to a rectangular centre-section which was supported by six struts.

To increase the field of vision the centre section had celluloid panels and the wing root fairing strips were made from a clear plastic, both of these vision aids tended to have short lives, and were usually replaced with doped fabric or plywood as appropriate.

After successful flight tests with only minor modifications, the Falcon 3 was put into production.

Eight more were built, but didn't see as much use as trainers as they should have, due to the short-sighted prevailing opinion that trainee pilots gained more from having to master gliders with poor flying characteristics.