Two-stroke v.s Four-stroke – WHY 4 iso 2?

[Ref. Pilot’s Handbook of Aeronautical Knowledge, FAA-H-8083-25B Page 7-2]

Two-stroke v.s Four-strokeWHY 4 iso 2?

  • inherent inefficiency and disproportionate emissions of the earliest designs, use of the two-stroke engine has been limited in aviation

However, two-stroke engines somehow have higher power-to-weight ratio than a comparable four-stroke engine.

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