R-4D Rocket engine 3D model

The R-4D is a small hypergolic rocket engine, originally designed by Marquardt Corporation for use as a reaction control thruster on vehicles of the Apollo moon program. The engine runs on self-igniting components: monomethylhydrazine and nitrogen tetroxide. The R-4D is a fuel-film cooled engine. Some of the fuel is injected longitudinally down the combustion chamber, where it forms a cooling film. It is rated for up to one hour of continuous thrust, 40,000 seconds total, and 20,000 individual firings.

The model was recreated from photographs and videos from the Internet. A model has been created in the Fusion 360 program.