From AI (Perplexity) :
Based on the search results provided, it appears that the statement "Swift has already stated that their 100 UL will not work for a good percentage (15%??) of the GA fleet" is not entirely accurate. Let's break down the information available:
Swift Fuels' Unleaded Aviation Gasoline Options
Swift Fuels offers two main unleaded aviation gasoline (avgas) products:
Swift UL94: This is a 94-octane unleaded avgas that is compatible with lower-compression, naturally aspirated aircraft engines.
Swift 100R: This is a 105-octane (R+M)/2 rated gasoline (100 MON) designed to replace 100LL leaded avgas in all piston aircraft
Compatibility and Availability
Swift UL94 is indeed limited in its compatibility, as it's only suitable for low compression, naturally aspirated aircraft engines. This represents less than 85% of the fleet
However, Swift 100R (their 100-octane unleaded product) is designed to replace 100LL in all piston aircraft. This suggests a much broader compatibility than the 85% figure mentioned in the query.
As of September 2024, Swift Fuels' 100-octane unleaded aviation fuel received its first Supplemental Type Certificate (STC) for use in Cessna 172 R and S models. This indicates progress in the certification and approval process for wider use.
Distribution and Future Plans
Swift has indicated that they will replace their 91/94 distribution with 100UL when it becomes available, suggesting a planned transition to the higher-octane unleaded fuel
The company is working on expanding its distribution network, with partnerships like the one with AvFuel mentioned in the search results.
It's important to note that the transition to unleaded avgas is an ongoing process, with multiple companies working on solutions. The exact percentage of the GA fleet that can use Swift's 100-octane unleaded fuel may change as more STCs are granted and more testing is completed.In conclusion, while there are limitations for Swift's lower-octane UL94, their 100-octane product (100R) is designed for broader compatibility across the GA fleet. The statement in the query appears to be mixing information about different Swift fuel products.