Hi there - we're happy to approve your question related to your creative project, and we are happy for people to answer. However, we should warn you that many flairs have become reluctant to answer questions for aspiring novelists and the like, based on past experience: some people working on creative projects have a tendency to try to pump historians for trivia while ignoring the bigger points they were making, while others have a tendency to argue with historians when the historical reality does not line up with what's needed for a particular scene or characterization. Please respect the answers of people who have generously given you their time, even if it's not always what you want to hear.

Additionally, as amazing as our flair panel is, we should also point out that /r/AskHistorians is not a professional historical consultation service. If you're asking a question here because you need vital research for a future commercial product such as a historical novel, you may be better off engaging a historical consultant at a fair hourly rate to answer these questions for you. We don't know what the going rate for consultancy work would be in your locality, but it may be worth looking into that if you have in-depth or highly plot-reliant questions for this project. Some /r/AskHistorians flairs could be receptive to working as a consultant in this way. However, if you wish for a flair here to do this work for you, you will need to organize this with them yourselves.

For more general advice about doing research to inform a creative project, please check out our Monday Methods post on the subject.

1. They used radios, to communicate with each other in the air and ground bases.
2. There were no ejection mechanisms in the Second World War (on the Allied side, at least, a small number of German aircraft used them). Bailing out involved opening or jettisoning the canopy then jumping out, or inverting the aircraft to fall out; see an older thread here for some more details.
3. Fighters usually had a trigger or button on the control column to fire their guns; see e.g. a Spitfire control column or page 40 of the Mustang IV pilot's notes. For most single-seat fighters there was little apart from the gunsight for targeting.
4. There were massive air operations across Europe before, during and after D-Day; see e.g. the RAF and USAAF official histories.

It might be worth watching a film or two for an idea of how things worked; obviously they're not documentaries, but the 1969 Battle of Britain particularly and 2017 Dunkirk are good from the RAF side, I'm not really aware of much for the USAAF apart from possibly Red Tails (which takes a fair few liberties).