Initial fuselage lay-up was performed by Garrison along with engineer Burt Rutan and future private astronaut Mike Melvill, who also performed a fair number of the test flights.

[1] The aircraft is a single engine four-seat retractable tricycle gear low-wing with a T-tail arrangement.

The tapered wings are equipped with large Fowler flaps.

The original design has been modified with 45-degree sweep winglets and gear doors.

[3] Data from Flying MagazineGeneral characteristics Performance