Handley Page H.P.50 Heyford - version overview:
Mk. I and Mk. IA - 23
Mk. II - 16
MK. III - 70
Total built 125 units
The aircraft was a biplane, night bomber.
The first prototype flew in June 1930, and the type entered service in 1934.
Starting with the Mk.II version, the more powerful 650 hp Kestrel IV engine was used for propulsion.
The aircraft entered the armament of eleven RAF squadrons.
In September 1939 it was used by one more squadron. However, the type was withdrawn and served as a trainer until 1941.
Sources:
experts.about.com
www.handleypage.com
Mk. I and Mk. IA - 23
Mk. II - 16
MK. III - 70
Total built 125 units
The aircraft was a biplane, night bomber.
The first prototype flew in June 1930, and the type entered service in 1934.
Starting with the Mk.II version, the more powerful 650 hp Kestrel IV engine was used for propulsion.
The aircraft entered the armament of eleven RAF squadrons.
In September 1939 it was used by one more squadron. However, the type was withdrawn and served as a trainer until 1941.
Sources:
experts.about.com
www.handleypage.com