Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

King Kobra with tuned pipe

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Old 02-27-2007, 06:22 PM
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dhal22
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Default King Kobra with tuned pipe

Starting a KK with the intentions of using a .61 with a tuned pipe. Upon engine layout I realized that laying the engine on its side would send the tuned pipe directly at the wing. I was hoping to run the pipe under the fuselage as opposed to on the side above the wing as an upright engine mount would require. Any recommendations? and thx in advance. david
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Old 02-27-2007, 07:09 PM
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kamakazie frank
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Default RE: King Kobra with tuned pipe

dhal:

If you had a rear exhaust engine that would solve your problem.

Frank

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Old 02-27-2007, 07:49 PM
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Default RE: King Kobra with tuned pipe

I too am using a rear exhaust motor on this same plane MVVS .90
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Old 02-27-2007, 09:59 PM
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Default RE: King Kobra with tuned pipe

What kind of .61? OS does make exhaust extensions for certain engines. I have a couple for a .91 that I have laying around with no future.
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Old 02-27-2007, 10:33 PM
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Default RE: King Kobra with tuned pipe

ditch the pipe and go with a very simplistic Jett Stream muffler, you'll loose about 2-3 hundred RPM as opposed to the full length pipe but in the air you'll never miss it.

kc
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Old 02-28-2007, 08:27 AM
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Default RE: King Kobra with tuned pipe

I had one years ago and mounted my YS .60 with its head pointing at 7:30 on the clock face and then ran the pipe down the center of the wing. I made a pipe clamp that used the wing bolts to hold the wing and the pipe. It work well. Mine had retracts as well and would fly straight up out of sight. A very clean install.
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Old 02-28-2007, 11:17 AM
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Default RE: King Kobra with tuned pipe

http://www.aeroproduct.net/

they have side to rear headers, bolt to side ex engine, wraps around to put pipe behind engine... gotta love the C/L guys!
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Old 02-28-2007, 11:47 AM
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Default RE: King Kobra with tuned pipe

Just an example of one installation
http://www.jettengineering.com/hall/bc-kk.html

Years ago one KK I set up used an OS FSR61, and a long-reach (tipo/cuarare type) header, pipe slung under the wing.

You can also set a side exhaust engine, cylinder about 15 tilted from vertical (less tilted than shown in the above example), which should route the pipe right down the side of the plane, above the wing saddle. You would probably require 1.5" reach header (medium reach)
This is sorta the same thing that Cobra1 noted - except his pipe ran along the belly.

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Old 02-28-2007, 12:01 PM
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dhal22
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Default RE: King Kobra with tuned pipe

I have a Mark .61 (Moki?) that i intend to use. It came with a Macs header and tuned pipe. It was a package purchase. I am not set on using this combo, but it is one that I have. Thanks to all of everyone's replies I now have decisions to make. I especially liked the rear exhaust setup that kamakazi frank has. Thanks again guys.
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