The airplane is described being powered by piston engines, the sounds, the cockpit area, the flight engineer's controls are made to look like a piston engine airplane of that era. Yet, the engine nacelles on the airplane are that of a turbojet or turboprop. That is, a jet engine with a propeller.
In reality, it is not possible that a great scientist should not have considered temperature as a variable factor. The fact that you have to have the same temperature when you repeat and compare experiments, is an absolute basic thing in science that you learn already in high school.
At Gander Airport in Newfoundland, the pilot refuses to allow Honey back on the plane to continue to Montreal, while Miss Corder tells him they'll see him in Montreal. But since Honey was on his way to Labrador, which was part of Newfoundland, to investigate the previous Reindeer crash, he would have been leaving the plane at Gander and not going on to Montreal in the first place.
At the end of the picture Honey recalculates to take into account the test example being in a 'heated shed' whereas at the beginning of the picture you can see people's breath while they are talking, you don't see that in a 'heated shed'.