Edge 513 Posted April 27, 2008 Share Posted April 27, 2008 Well, I had to redo a foam cut yet a second time and am waiting for the micro to set, so I thought I would bring up a subject that is interesting to me. Boat tailed exhaust.[bTE] One single larger center exhaust that contributes to a faster plane and is situated so that a 3 bladed prop doesn't get cooked or blackened Cajun style like the 3 and 9 o'clock plans exhaust does. Lower cowl needs to be changed but adds to the aero equation. Theres some recent posts on Slades forum about Dave timeing his 3 blade and 180'ing it and it will still get blacked, so I remembered this subject- and thought why not bring this up as an alternate? Of course if you have a 2 blade there is no blackening. But the BTE also contributes aero-wise. Since you posted a couple of years about this innovation you did, and have done for others Lynn, could you elaborate? Heres a pic from that post[on the old dusty forum] ... and a couple of ideas for mine [short and long]. Lynn, what is the diameter of the outlet tube for the 4 into one? I would think the 3 into one would be much smaller. Also please comment on the performance on the 4 into 1 equipped plane for those who missed the old post...it was great. Pardon the MSpaint program- it's all I've got. BTW- this is Chris E's 540 Cozy install that I have crayoned over. I noticed the diameter of his side exhausts that take 3 feeds...is this optimum, or might it be better larger? These would look awesome in stainless. Drool. Quote Self confessed Wingnut. Now think about it...wouldn't you rather LIVE your life, rather than watch someone else's, on Reality T.V.? Get up off that couch!!! =) Progress; Fuselage on all three, with outside and inside nearly complete. 8 inch extended nose. FHC done. Canard finished. ERacer wings done with blended winglets. IO540 starting rebuild. Mounting Spar. Starting strake ribs. Link to comment Share on other sites More sharing options...
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