The use of aviation piston engines involves many aspects to ensure the safe and efficient operation of the engine and extend its service life. Here are some key considerations:
First, the preparation before the launch
Check relevant systems:
Oil supply system: ensure sufficient fuel, smooth oil circuit, no leakage.
Ignition system: Check whether the spark plug (nozzle) is normal, whether the electrode gap meets the requirements, and whether the ignition coil and high voltage wire are intact.
Intake system: Check whether the air filter is clean and whether the intake pipe is smooth.
Oil system: Check whether the oil level is within the normal range, whether the oil is clean, and whether the oil filter needs to be replaced.
Check engine parts:
Check whether the connection of cylinder, piston, connecting rod and other parts is firm, and whether it is loose or worn.
Check that the engine fastening bolts are tightened to ensure that the engine is securely connected to the fuselage.
Second, start and run
Starting method:
When using an electric starter or manual starter, follow the manufacturer’s recommended steps.
Avoid forcibly starting the engine in a low temperature environment, and preheat it if necessary.
Operation monitoring:
During the operation of the engine, you should pay close attention to the instrument indications, such as speed, temperature, pressure, etc.
Check the running sound and vibration of the engine regularly, and stop the engine in time if any abnormality is found.
Operation specification:
Avoid working for a long time at the maximum speed and rated speed to avoid overheating or increased wear of the engine.
Avoid suddenly pushing and pulling the throttle handle too fast or too fast, so as not to cause the engine to work abnormally.
When flying in the air, avoid misoperating the magneto switch, which will cause the engine to stop in the air.
Third, maintenance and maintenance
Regular maintenance:
Clean, lubricate and inspect the engine regularly according to the manufacturer’s recommended maintenance cycle.
Replace badly worn parts, such as spark plugs, oil filters, etc.
Oil system maintenance:
Check the quality of lubricating oil regularly, and replace it in time if pollution or deterioration is found.
Ensure the lubrication system is clean, regularly clean the lubricating oil filter and replace the lubricating oil.
Prevent corrosion:
When parked in a humid environment, moisture-proof measures should be taken, such as the use of desiccant or sealed storage.
For long-term parked engines, regular turning operations should be carried out to prevent components from sticking.
Fourth, precautions for use in special environments
At high altitudes:
Because of the thin air, the power of the engine will decrease. The mixing ratio and ignition advance Angle should be adjusted according to the actual situation to ensure the normal operation of the engine.
Cold areas:
When starting the engine in a low temperature environment, a preheating device should be used or a low temperature starting fluid should be added.
Avoid high load operation before the engine is fully warmed up.
Windy and sandy weather:
The cleaning and replacement frequency of the air filter should be strengthened to prevent sand and dust from entering the engine.
When flying in windy and sandy weather, you should pay close attention to the operation of the engine, and stop the engine for inspection in time if any abnormality is found.
Fifth, safety precautions
Fire prevention:
During the operation of the engine, ensure that the fuel and oil system does not leak.
Avoid using an open flame near the engine or performing high-temperature work such as welding.
Prevent electric shock:
When inspecting or maintaining the electrical system, cut off the power supply first.
Use insulated tools to avoid electric shock.
Personnel protection:
During engine operation, ensure that personnel maintain a safe distance from the engine.
Avoid placing inflammable and explosive materials near the engine.
In summary, the precautions for the use of aviation piston engines involve many aspects such as preparation before start, start-up and operation, maintenance and maintenance, use precautions in special environments and safety precautions. Only by strictly adhering to these considerations can we ensure the safe and efficient operation of the engine and extend its service life.
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