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How to Loosen a Cox 049 Engine

Cox manufactures small combustible engines that are used in remote-controlled aircraft. The Cox 049 functions in much the same way as a larger engine: It is powered by fuel and connects to the front propeller of the aircraft. Like a standard engine, it is made up of various components; tightening or loosening these components -- such as the needle valve -- will allow you to add fuel to it.

Things You'll Need

Phillips screwdriver

Instructions

- 1
  Turn off the aircraft and use your screwdriver to remove the plane housing from around the engine according to the manual for your particular model airplane.
- 2
  Loosen the screw at the front of the propeller and remove it. Remove the propeller from the unit.
- 3
  Locate the metal needle valve at the end of the engine, near where you removed the propeller; it looks like the top of a screw.
- 4
  Turn the needle valve counterclockwise to open it; this allows you to insert the fuel hose and refuel the engine.
- 5
  Turn the fuel valve clockwise when you are finished refueling to secure the valve.

Aviation