I'm happy to present my newest MOC, a propeller plane with realistic controls.
This is the list of functions:
Freely spinning propeller
Steering rear wheel
It is a medium sized build at 707 parts. The dimensions are as follows:
length: 30 cm / 11"
width: 33 cm / 13"
height: 10 cm / 4"
The working controls are the main part of the plane. This is an overview of the mechanisms: Propeller plane controls by Jerry LEGO Creations, on Flickr
The yellow parts control the elevator, the yellow the ailerons and the magenta parts are for the rudder.
The way the ailerons and elevator work are not too complex. By moving the yoke forwards and backwards, the rearmost connector also moves. This connector is connected to the elevator.
The ailerons are connected to the yoke via a set of gears. The most interesting part of these 2 mechanisms, is the CV joint. This joint allows the axle to move in and out easily, while transferring the rotation to the gears.
The way the rudder works is a bit more complex. Here is a render showing the different parts of that mechanism: details pedals by Jerry LEGO Creations, on Flickr
The yellow parts are the pedals. When you push a pedal forwards, it also pushes a purple liftarm forwards. To this liftarm a rubber band is attached at the bushes.
The rubber band makes the rudder return to centre. The purple liftarm is blocked from moving backwards (towards the seat) by the dark green parts. This is done to make sure that both rubber bands don't cancel each other out.
The movement from the pedals is transferred to the light blue liftarms. These are in turn attached to the lime parts. The lime 3L liftarm rotates about the pin in the middle. It is also the link between both pedals. The lime green thin liftarms are connected to an axle which finally rotates the rudder.
Renders showing the mechanisms in action can be seen at 1:19 in the video.
If you are interested in building it for yourself, here you can find free instructions: ReBrickable
It is also on Lego Ideas, any support will be highly appreciated: Lego Ideas
Finally, here are some more images showing the plane: Propeller plane rear side 2 by Jerry LEGO Creations, on Flickr Propeller plane front 2 by Jerry LEGO Creations, on Flickr Propeller plane top by Jerry LEGO Creations, on Flickr Propeller plane front by Jerry LEGO Creations, on Flickr