This instructable is for how to add an extra dimension to your model aircraft; a working propeller (and lights!) which is surprisingly good as a desk fan. It can be adapted to any aircraft of most scales, although you would struggle to fit it into anything smaller then 1:72 scale. You could also use the same principles to make one of those plane-on-a-string things that fly round in circles, or even make an r/c version! I am assuming you know model-making basics such as glueing, painting and adding transfers (if you want advice on these, there are loads of good websites and other instructables on this).
You will need:
A Model Kit (mine was an Airfix 1:72 scale Spitfire mk1a)
A micro-motor (I got mine from an old r/c boat; also available from the internet, including here: http://www.wheelspinmodels.co.uk/i/93255/)
DPDT Switches x2
Quality cardboard (about 2mm thick)
Craft knife (I used a small pocket knife)
Soldering iron + solder
In all, mine cost me £7 (about $10, I think), £5 for the kit and £2 for the paint. I had all the tools and glues already. If you were buying the motor, this would add another £4 to the cost. It's a cheap and cheerful project, this one!
Step 1: Pre-painting the kit.
This stage is optional, but saves time later on and also results in a better finish.
Paint all small, non body-coloured parts (such as the prop, wheels and exhausts) while they are still attached to the plastic frame. These parts are glued on later, after the body has been painted and this reduces paint bleed and overlap.
Follow the instructions for the kit until you get to putting the fuselage together. This is when we add the Motor (and lights if you have the space).