<Kind of makes you wonder why they don't use alcohol resistant rubbers in aircraft fuel systems>
Hi Brian You already know how slow the certified area of the aviation industry is to adopt new technology. Once a part has been certified with the FAA as being airworthy, it is just too expensive or the liability is to great to certify another part that looks the same only it uses a different formulation for its rubber. Mogas( the gas you buy at the service station) blended with alcohol is unapproved for use in all certified aircraft engines. And mogas is only approved by using an STC that is not issued by the Airplane engine manufactors. What economic sense would it make for Continenal or Lycoming to go to the expense to change to alcohol resistant parts if alcohol is not a approved fuel additive? None Yes, if you use an experimental engine...You as the airplane manufactor may approve gas blended alcohol. I, in no way, am a petrol chemical engineer but before you decide to use ethanol gas, you should do some serious research into the topic. There are reasons alcohol is a prohibed avgas fuel additive. Brant Hollensbe West Des Moines, Iowa Bhollensbe at mchsi.com
