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James, Who in OZ did you buy from? Neil. From: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Sunday, August 30, 2020 12:58 PM
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: Turbos......... Charlie, my airframe will be : Twin fuselage Amphibian (2p+2s, Tandem seating), twin pusher (Billet 13b, P-Port), on retractable skis (water ops), imbedded tires (land ops), carbon fiber(much/most cored sandwich). Oh yes…my design! 1”:12’ scale electric RC model tested on calm water so far. Starboard half, skeleton full scale plug on floor now… waiting on engines for nacelle shape integration. They are a year late. Buying from Australia was slow! Hope to use Neil’s 3.12 reduction if it can be beefed up to hold the HP. Yes it is truly EXPERIMENTAL! -James whitehurst Sent from Mail for Windows 10 ??? Above 10,000 ft? I couldn’t figure out how… so I just received my Borg Warner EFR9280 Turbos with water and oil cooled ctr aluminum housing. I know its more complex but I figure I’ll have the HP to 18,000’. Comments enjoyed? James whitehurst Sent from Mail for Windows 10 As you can see on this dyno sheet much power is available where most folks like to run aircraft Rotaries. The ports you see in that picture are designed to operate best at 9,400 RPM, at 250HP, however that is a 12-A engine. 2292 CCs vice 2900 CCs for a 13-B, so more power from a 13-B. So ports designed for best power at say 5,500 RPM would have a shorter top (Closing Point) and a smaller bridge opening. I do not let any of the side seal ends to cross over the port so side seal damage is not a factor. So very nearly stock service life minus the wear you would expect from spending hours of operation at full throttle. With synthetic 2 cycle oil in the fuel and in the sump I suspect (but do not know) about 500 to 1,000 hours. A hot compression check or a hot leakdown test will tell the tail.........LEH In a message dated 8/28/2020 7:31:58 AM Eastern Standard Time, flyrotary@lancaironline.net writes: One word....Turbo normalizing. Ok that's two words, but that's my plan. In your opinion, how reliable is a bridge port engine? At what RPM do you see the benefits? 
We don't need no stinking turbos.....when we can have 250HP bridge ports......
Lynn E. Hanover
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