Two two seaters.
The Hawker Hurricane
The first of the two two-seat Hurricane Mark IIC trainers for Iran, mentioned above, performed its first flight on 27 September 1946. The trainer originally had tandem open cockpits, but the turbulence around the forward cockpit made the rear cockpit extremely drafty, and so a bubble canopy was fitted over the rear cockpit. The trainer originally retained the four Hispano cannon, but they were later deleted. The Soviets also field-converted some of their Hurricanes to tandem-seat trainers, with open cockpits, but few details are available about these conversions.
There were a number of odd one-off Hurricane experiments. One of the more interesting was the "biplane" Hurricane, which featured a jettisonable top wing with integral fuel tanks to reduce take-off distance with heavy loads, and to improve ferry range. The wing required the relocation of the radio mast to the belly of the aircraft. The modification was implemented by F. Hills & Sons and was designated the "Hillson FH.40". It proved too heavy to be serviceable.
Pics at
Hurricane with rear gunner