Corrected entry: In one of the dogfight scenes, there is a shot of Sky Captain pushing the stick forward, (which would result in the plane's nose lowering) with the following shot showing the plane rolling inverted and diving (that would be accomplished by pushing the stick to one side, followed by pulling it back.).
Corrected entry: As the hanger is bombed, the film shows both landing gear legs of the P-40 rising together, while in real life one landing gear leg retracted first.
Corrected entry: When Frankie ejects from her underwater plane, she shoots up to the surface at an alarming rate. The decompression should be near fatal.
Corrected entry: The newspaper we see at the beginning of the film triumphantly headlines the arrival of the Hindenburg III in New York. How long prior to printing of the newspaper would that have been? Twelve hours? However, the same edition of the newspaper carries the story of a Doctor Vargas, a 'Missing Scientist', who was last seen on the Hindenburg III itself. Not in their Universe nor ours would the Police, Press or anyone else be interested in a scientist who had been 'missing' for a few hours.
Corrected entry: All the pods containing the animals are ejected several minutes before Sky Captain and Polly enter their escape pod. Yet when the pods start landing in the water, their pod is one of the first to land.
Corrected entry: At the beginning of the movie, the robot assassin is shown crossing off the names of its victims on a paper list. A robot really wouldn't need a handwritten piece of paper to remember its targets.
Corrected entry: When Joe and Polly emerge in the swampy area of the island at sea level, they exit the plane and run through bushes away from dinosaurs. Through the bush and trees they have to then cross a deep ravine where Joe loses his gun. Surely not, as this was sea level only a few seconds ago.
Corrected entry: When Polly Perkins pulls the lever and all the animals fall into the sea, a considerable proportion of the rocket's mass is lost. From Newton's Laws, assuming a constant force from the engines, the loss of mass means that the acceleration should increase. There's no sign of this.
Corrected entry: Several P-40 related mistakes here: 1 - The P-40 Warhawk did not have the range to fly from the continental United States to Asia without stopping. While this is a common plot device, it defies belief; 2 - I cannot find any references to a two-seat P-40, although it can be argued that the plane was quite heavily modified, considering its other "features." Additionally, travelling great distances in such a two-place cockpit would be very uncomfortable. 3 - There is a scene where one of the P-40's wings catches fire due to a fuel tank hit. This is possible, but unlikely, as self-sealing fuel tanks were introduced in the P-40B. Given the nature of the film and the fantastic nature of the story, these are not huge mistakes, but since the technology is loosely based on our own history, I found them to be rather irritating.
Corrected entry: The barriers on the bridge connected to the airfield base would have been destroyed by the robot when it was dragged into the hangar by the two trucks. There was only room enough for two vehicles and the robot was much larger so the aerial shot later of the bridge couldn't have had the barriers intact.
Corrected entry: In addition to Joe's and Polly's clothes and camera becoming contaminated by the uranium in the mine, Polly's film would have been exposed by the radiation as well. Radioactivity was first discovered by accident when a sample of pitchblende, the principal ore of uranium, exposed photographic plates stored nearby. Any further use of the camera would have been pointless.
Corrected entry: In the final scene, as Polly lifts her camera for her final shot, there is no lens cap on the camera. Therefore Joe's hilarious line of "lens cap" is not needed, although it makes for an extremely funny ending.
Corrected entry: Totenkopf has the ability to manufacture gigantic war robots and interplanetary spacecraft, and a huge industrial complex to support both, yet he has to raid New York City to steal electrical generators? Why not build his own generators? To say that he needed the generators to run his plant makes no sense, since he needed the plant to build the robots to steal the generators in the first place. It's a chicken-and-egg problem.
Corrected entry: Joe and Franky jump into their respective aircrafts. We see Franky slide her canopy shut and grin at Joe. We cut to Joe, grinning back at her and sliding his canopy shut as well. Then we cut back to Franky sliding her canopy shut again.
Corrected entry: When Joe's plane goes underwater for the first time, the propeller blades are shorn off by his power dive. When the plane re-emerges, the blades are back.