Ed Cregger
Posts: 7735
Joined: 1/31/2002
From: Ringgold,
GA, USA
Status: online
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quote:
ORIGINAL: WEDJ
Ummm, Looking forward to the build thread. my thoughts, Use the firewall mount, install retracts, and you can fly both the SPA and BPA with it. The Jett muffler is like the Magic muffler I used to use, just as good as a tuned pipe, less hassle, wider range.
Let's see those photos come...............
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My first Deception with Rom-Air gear utilized the firewall mount nose gear. What a PITA to install, maintain and fit everything in the nose that needed to be there.
My later models utilized the Rom-Air belly mount. That was so much easier to deal with that it was almost sinful (Tiporare & Phoenix 8).
Don't be afraid to notch out the front of the wing to clear the nose gear. Just be sure to plan ahead and add a nice plywood spar between the two wing halves. I learned about the spars indirectly from Dave Brown when he was flying actively in competition. He flew his models so much that after a while, the butt glued center section/wrapped with fiberglass cloth and epoxy joints failed over time. Apparently, the extra weight of the plywood and epoxy lent enough longevity to make it worth its weight to Dave. If you're reading, Dave, jump in here and comment, or correct me if I have something wrong.
I just spoke with Dub Jett on the phone while ordering two of his high performance mufflers for my pair of OS .55AX engines. The mufflers that have flanges that fit the TT .46 fit all OS engines in that size range and work perfectly. He did add some valuable information regarding prop selection when using his mufflers. Start with an 11x6 (or less load) when using his mufflers. You should be able to richen the mixture by approximately 3000 rpm off peak with whatever size prop you run. This means that as you richen the mixture off of peak, you should be able to richen the engine to the point of about 3k rpm before the engine "falls off the pipe" (these are my words). If not, you could be in dangerous territory, especially with only a 1k rpm richening until it "falls off the pipe". All of this means that when using his Jett muffler, the recommended 12" props of any pitch are simply out of the question. I'm not including 12x4 props for 3D because this muffler is not desirable for 3D usage, which is attributable to its "pipiness" (again, my words, not Dub's). Hopefully, if I've made an error, either Bob Brassell or Dub Jett will jump in and set us straight.
I too am building a Banshee, but I have no reservations about doing away with the nose gear retract. Once in the air with the gear up, no one will know the difference at all. I'm also going with seperate aileron servos in each wing panel. What the hey??? <G>
Ed Cregger
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Artisan
"Flying models since the Fifties - I'll get the hang of this yet!!!"
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