Farmersboy

Factual error: The four-barrelled Flak gun is shown running out of ammunition, namely a belt of rounds. This is most likely intended to be a Flak 38, which used twenty-round magazines, not belts. It had a relatively low rate of fire as the magazines had to be constantly swapped out, and two barrels were usually fired at a time. (00:16:58)

Farmersboy

Factual error: This is supposed to be an F-35B, the STOVL version with the additional lift jet. The B model has no internal guns, let alone two firing from the bottom of the air intakes. The only gun it can carry is fitted in a multi-mission pack attached to the belly. (01:54:25)

Farmersboy

Character mistake: As Teddy is announcing the bad news, he calls Mark Watney 'Mark Watton'. (00:09:48)

Farmersboy

Factual error: In the last minutes of the film, as Memphis Belle is coming in to land, you just catch a glimpse of a very big hangar. This is Hangar 1 at Duxford, the Imperial War Museum where a lot of the flight filming was based at, and was built in the 1980's. This hangar was rebuilt and enlarged and is now called Airspace.

Farmersboy