“”Your article on grounding the airplane prior to fueling was informative on why we ground the plane,”" wrote Ken Kellogg after he read my June 9 column, “”Grounded: What’s the proper way to ground during refueling?”"

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The number one question about ethanol should be “”does it take more energy to produce than we get out of it?”"

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A few issues back I discussed possible fuel handling problems with a proposed ethanol aviation fuel. In this column I would like to discuss energy content.

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Why is it important to ground an aircraft during refueling? What’s the proper way to ground an aircraft during refueling? These are just some of the many questions I’ve received about the process, so I thought I’d tackle them in this issue.

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There is an old joke that the definition of mixed emotions is watching your mother-in-law go over a cliff in your new Corvette. It is in this state of mind that I recently read Dr. Dennis Helder’s “”Investigation of Ethanol as a General Aviation Fuel-Final Report.”"

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Kip Pratt, director at Berkeley County Airport (50J) at Moncks Corner, S.C., recently wrote to let me know that my article, “”Stay safe while fueling your plane”" in the March 24 issue, would be posted around the airport “”in hopes that my tenants who use auto fuel will take heed.”"

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Part of the concern over the use of auto gas in aircraft is procedures used to handle the fuel.

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Patrick Puckett asks: “”Since E-85 is rated at 105 octane, can we use it in engines that require 100LL?”"

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To the average pilot ? and even many mechanics ? grease is grease. People feel that as long as they inject a slimy substance into each grease fitting at the proper time interval that all of their bearings should last forever.

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Bill Albrecht, who has a heli-pad and hangar in his backyard, recently installed a 2,000-gallon avgas tank. His question: “”What is the shelf life of avgas?”"

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