The Avro Type 694 Lincoln is a British four-engined heavy bomber, which first flew on 9 June 1944. Developed from the Avro Lancaster, the first Lincoln variants were initially known as the Lancaster IV and V; these were renamed Lincoln I and II. It was the 2nd last piston-engined bomber operated by the Royal Air Force (RAF).
Avro Lincoln
Royal Air Force Lincoln B.2 used by Napier's for icing research work until 1967 (1966)
Lincoln A73-20 during a test flight. Both starboard engines have their propeller blades feathered
Lineup of the first operation of No. 1 Squadron, Royal Australian Air Force at RAF Tengah, Singapore, August 1950
Heavy bombers are bomber aircraft capable of delivering the largest payload of air-to-ground weaponry and longest range of their era. Archetypal heavy bombers have therefore usually been among the largest and most powerful military aircraft at any point in time. In the second half of the 20th century, heavy bombers were largely superseded by strategic bombers, which were often even larger in size, had much longer ranges and were capable of delivering nuclear bombs.
USAAF B-29 Superfortress, a heavy bomber.
The British produced Short Bomber
The Douglas B-18 Bolo on take off
The USAAF B-24 Liberator