Bloopers
A few interesting bloopers / gaffs gleamed from t'nternet relating to a couple of films frequently mentioned in this thread:
Pearl Harbour
In the movie, Rafe is assigned to an RAF Eagle Squadron prior to USA involvement in WW II by order of Jimmy Doolittle. In reality, active duty personnel could not be assigned to serve with a belligerent nation while the US was neutral. They would have to resign their USAF commission and re-enlist into the RAF (usually via Canada). This practice was greatly discouraged.
Rafe wears an Eagle Squadron badge, as do the Spitfires. The squadron code 'RF' is for No.303 Squadron, which was a Polish unit. The only Hurricane seen in the film has the correct codes for an Eagle Squadron, 'XR-T' for No.71 Squadron.
In the England scene, a spitfire with a four-blade propeller is seen. This was a late-war model. All Spitfires at the time of the Battle of Britain were models with three-blade constant pitch propellers.
Top Gun
When Top Gun first came out, everybody in our squadron made a big joke of the "Deadly Blue Tubes". This refers to the sidewinder missiles that were supposedly launched from the Tomcats. Those who are familiar with aircraft weapons would know that the blue tube is a sidewinder simulator. If you were to launch this from the aircraft, all it could do is drop like a rock.
During the briefing before the final scene, the Captain says, "The Migs carry the Exocet missile. They can fire that missile from a hundred miles away." Yes they could fire the Exocet from a hundred miles away, but the Exocet's maximum range is around 40 miles.
Take notice of everyone's hands during the action sequences. No one is wearing gloves. As standard issue for military pilots, the gloves are made of Nomex and provide protection from fire and allow for a better grip when things get a little hot and heavy.
(text copied directly from web pages (moviemistakes.com), so apologies for any spellling mistakes)