Steve , Great plane . The propeller spin is pretty easy to do for this model. What you do is set up your pose then save the render as a png but hide the proppeller first. Then go back and hide everything but the propeller . Take 4 - 6 renders of the propeller alone turning the propeller dial . Then put them all in layers, line them up on top of each other , flattin them into one layer and do a motion blur on them till you get the right effect . I need to play with it more but u get the idea.