The problem is, you are unlikely to get funding to travel around "shooting planes" - you will have a hard time convincing anyone they need to put up any money as they already have access to a huge library of images on A.net and many other services. In general, you have to go and get the images and then try and sell them.
The only possible way round this is to think up an original (an saleable) idea for a book or article. If the idea is good enough, and you can convince a publisher you can come up with the goods, you MAY be able to get some advance money ... however, I have to say that without an existing track record, the chances of success are diminishingly small.
More realistically, you will need to spend months (more likely years) building both a library of images and developing a style which is both distinctly yours and also saleable. It may help if you were to specialise on a theme and go for comprehensive coverage - preferably one where you have some access advantage over other photographers. As a Canadian, you might, for example, find covering bush planes and freighters of the north a bit easier than would European photographers.
Also, if you are aiming for sales, you should start shooting NOW with that in mind. Eg., shoot slide, and shoot duplicates whenever you can (cheaper and preferable to making duplicate trannies). Try and learn a bit about the reproduction process as a picture which works better in repro will be more attractive to a picture editor.
Colin K. Work, Pixstel