Category Archives: radial engine

Quality Control as Relates to Auto Gas Use in Radial Engines

The R-985 engine will run rather well on true 91 to 93 octane unleaded gasoline. The problem is more of a quality control issue than it is the engine’s ability or inability to effectively burn unleaded automotive fuel. It is true that the engine was designed and tested using leaded gasoline of various octane ratings.

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Importance of Fuel System Screens on your Radial Engine

This is the sixth topic in the series about the 100 hour / annual inspection. This series focuses on maintenance performed during an effective 100 hr. inspection on R1340 and R985 engines.

  1. Oil Change with filter/screen & sump checks.
  2. Valve adjustment – Positive or compression.
  3. Ignition timing check – Spark plug servicing.
  4. Compression check – differential. 
  5. Air filter and carb – heat system check.
  6. Fuel System Screens.
  7. Cylinder Head Checks.

Continue reading Importance of Fuel System Screens on your Radial Engine

Air Filter & Carb – Heat System Check – The 100 hour Radial Engine Annual Inspection Series

This is the fifth topic in the series about the 100 hour / annual inspection. This series focuses on maintenance performed during an effective 100 hr. inspection on R1340 and R985 engines.

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The 100 hour Radial Engine Annual Inspection Series – Compression Check

This is the fourth topic in the series about the 100 hour / annual inspection. This series focuses on maintenance performed during an effective 100 hr. inspection on R1340 and R985 engines:

  1. Oil Change with filter/screen & sump checks.
  2. Valve adjustment – Positive or compression.
  3. Ignition timing check – Spark plug servicing.
  4. Compression check – differential. 
  5. Air filter and carb – heat system check.
  6. Fuel System Screens.
  7. Cylinder Head Checks.

Continue reading The 100 hour Radial Engine Annual Inspection Series – Compression Check

The 100 hour Radial Engine Annual Inspection Series – Valve Adjustments

This is the second topic in the series about the 100 hour / annual inspection. This series focuses on maintenance performed during an effective 100 hr. Inspection on R1340 and R985 engines:

  1. Oil Change with filter/screen & sump checks.
  2. Valve adjustment – Positive or compression.
  3. Ignition timing check – Spark plug servicing.
  4. Compression check – differential.
  5. Air filter and carb – heat system check.
  6. Fuel System Screens.
  7. Cylinder Head Checks.

Continue reading The 100 hour Radial Engine Annual Inspection Series – Valve Adjustments

The 100 hour Radial Engine Annual Inspection Series – Part 1

It’s annual inspection season again. I guess it like death and taxes…sure to come around. Lots of folks have asked “what should I have done to my engine during the annual?” The engine maintenance manual, part number 118611 contains the Periodic Inspection Tables listing the Requirements for the “A” (50 hr), “B” (100 hour inspection), “C” (200 hour) and “D” (Midway to Overhaul) inspections on R1340 and R985 engines. Of the requirements listed I’d like to offer some recommendations on seven of the “heavyweights”.

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Radial Engine Operation Techniques That Can Shorten Cylinder Life

There are a number of Radial Engine Operation techniques that can shorten cylinder life (head failure). There are also a few mechanical problems that can cause premature cylinder head failure. The following items, hopefully, will shed some light on the subject.howmanyenginesdoyoucount

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Getting A Fresh Start On Your Radial Engine

Getting A Fresh Start On Your Radial EngineAt Covington Aircraft, installing radial engines is part of our regular routine.
However, we find that many pilots and aircraft enthusiasts enjoy working on their own airplane, as this knowledge of mechanics can provide better safety during flight. By understanding the operation and parts of the radial engine, it also becomes easier to identify possible problems quickly, and to troubleshoot concerns in-flight for a smoother journey. Continue reading Getting A Fresh Start On Your Radial Engine