The ultimate goal? An unleaded drop-in replacement for 100LL, the avgas we use to power a large percentage of the general aviation fleet—and particularly one that serves the roughly one-third of piston airplanes that require at least 100 octane fuel.
Report on Lead Emissions Reduction for Piston-Engine Aircraft Released
Key Takeaways:
- Achieving a "drop-in" unleaded replacement for 100LL avgas faces significant hurdles, including infrastructure costs, FAA certification for existing aircraft, and ethanol compatibility issues.
- A National Academies report proposes a multi-pathway approach to reduce lead emissions, combining the long-term development of lead-free fuels and new propulsion technologies with near-term operational changes.
- Immediate mitigation strategies include altering pre-takeoff run-up procedures and improving fuel handling practices to reduce exposure, alongside increasing the availability of existing lower-lead fuels through incentives.
- The report suggests a long-term goal for all newly certified gasoline-powered aircraft to be approved for an ASTM-specified unleaded fuel within the next decade.
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