- Howard Precision Steer Wheel Control System
- DHC BAC 1-11 Rolls Royce Tay Re Engine
- DHC B727 Rolls Royce Tay Re Engine
- DHC Thrust Reverser Howard Fage Cold-Flow
- DHC Dee Howard XR
- DHC Thrust Reverser GE-CJ-610 Jet Engine
- DHC Head of State Aircraft
- Howard Raisbeck Mark II
- HA Super Ventura
- HA Howard 700
- HA Howard 500
- HA Howard 400
- HA Howard 350
- HA Howard 250 Tri-Gear
- HA Howard 250
