A version of the ST.4 with retractable undercarriage, the ST 6, attracted little interest, including a single conversion from an ST 4 Mk II.
Only four were built.
Engine: 2 x Pobjoy
Undercarriage: retractable
Monospar ST.6
A version of the ST.4 with retractable undercarriage, the ST 6, attracted little interest, including a single conversion from an ST 4 Mk II.
Only four were built.
Engine: 2 x Pobjoy
Undercarriage: retractable
All Aero 