The
advantage of 2 strokes over the 4 stroke glow engines are they are generally
cheaper, less complicated, require less maintenance, and produce a higher power
output. Radio control model aeroplanes can be powered by a variety of engines, electric motors, co2, petrol engines, diesel and 'glow' engines as well as jet turbines. Selection of power source depends on the size and type of your model as well as the limitations of your flying site and your wallet.
Very common on flying fields are Glow Engines, so called because instead of a spark plug they use a glow plug. Glow engines come in either 2 stroke or 4 stroke forms. The 2 stroke being the most widely used.However 4 stroke glow engines are increasing as price disparity between 2 stroke and 4 stroke engines narrows.
Both varieties use Glow Fuel . The fundamental difference between the 2 stroke and 4 stroke glow engines is how fuel is supplied and once burnt removed from the engine .
The
advantage of 2 strokes over the 4 stroke glow engines are they are generally
cheaper, less complicated, require less maintenance, and produce a higher power
output.
The major disadvantage of 2 strokes is being higher revving than 4 strokes
unless effectively muffled they are very noisy.
In comparison the 4 stroke glow engine is quieter with a deeper sound, being
lower reving, has more torque and can swing a larger prop. 4 Strokes are generally
used for scale models where the deeper sound and larger props make them more
desirable for this type of model.
Basic 2 Stroke
Action Explained Basic
4 Stroke Action Explained
Both 2 stroke and 4 stroke engine types usually have the fuel mixture set/adjusted by two needle valves on the carburettor. One is is for fine tuning the idle speed the other the main adjuster needle for setting the optimum fuel/air mixture
|
|