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  1. #1

    Join Date
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    Evo .60NX Jettstream muffler (Red one not blue)

    Jett engineering break in procedures completed and 72 oz of fuel already run on stand:


    Hangar 9 4 stroke plug
    Omega 15%
    75 degrees F

    APC 10x6 17,100 (not a typo)
    APC 10x8 15,200


    Im sure this has been mentioned before, but I discovered a good way to get a dead accurate tach reading on cloudy days is to support a pocket size LED flashlight in front of the propeller about 2 feet away since the LED produces a constant lightlike the sun does. Will givedead accurate readings on sunny days as well. Just make sure to point tach directly at where you estimate theflashlight beam to be.




  2. #2
    MetallicaJunkie's Avatar
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    RE: Evo .60NX Jettstream muffler (Red one not blue)

    thats really good.... my ys45 peaked at barely 16k 10x6 apc with a Rossi short mini tuned exhaust
    \"Propellers are notorious for inflicting serious bodily harm while vigorously defending their space\" George Aldrich

  3. #3

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    RE: Evo .60NX Jettstream muffler (Red one not blue)

    What i do for rpm test on engines is that i have "test" props all APC and i have the back of the blades shaded in flat black with a thin coat of MolyD. it is a very light and thin coat. i have a white poster board in front of the engine also. I have also found that the cheap 15-30 tachs work just as well as the super expensive TNC tach.

    that 10x8 will be good if going in a clean plane. normal sport planes a 10x7 would be best. the red pipe likes to be in the 15,500-17,000 range on the ground. it doesnt like going past 17,800-18,000 and will limit results past that point. the Blue one is about 500 rpm less than the red. add a Gold pipe to the engine and use it around 17,500-19,500 range with a limit of 20,000. if need past 19,000 then get the black pipe.
    AMA # 126183
    Fly light, fly fast and fly low.

  4. #4

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    RE: Evo .60NX Jettstream muffler (Red one not blue)

    Thats a good idea, might try it out. I use a cheap tower hobbies tach. I agree and think the 10x7 will be the best fit especially with the red pipe. Dont want to blow the thing up by over reving it either. I am getting used to speed flying using a (dont laugh) Duraplane aerobat 40. Would rather wreck that if I have a mishap than something else. I have removed the landing gear, chopped 4 inches off each wingtip, rounded the wingtips, cleaned up the leading edge of the wing, and permanently fastened the outer portion of the ailerons to the wing to reduce flutter. Its rock solid. Just dont get slow. The old engine I had was a .46FX with the pipe that peaked 15000-15500 on ground with a 10x6. It did 105-110 mph straight and level with the FX using a bushnell radar gun. Curious what it will do with this engine.

    Any recommendations for a good speed plane after this? Won't be racing or anything. Just want to go fast and have fun with it. Would like to put a SJ .50 or .56 LX on whatever it is. I've looked at the Weston Magnum as its simple with no landing gear, just cant find much info on it.

    Ive attached a picture of the plane below, the gaudy decals sorta make it look good............I guess......
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  5. #5

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    RE: Evo .60NX Jettstream muffler (Red one not blue)

    well the cheap go fast (140mph) plane is the Great planes viper. get the uncovered (ARC) version and do the mods that many recomend in many threads on the plane and you will have a fast plane. with a Jett 56 LX and gold muffler you can run a 8x10 at around 19,000 or so and have close to a 165mph plane.
    AMA # 126183
    Fly light, fly fast and fly low.

  6. #6

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    RE: Evo .60NX Jettstream muffler (Red one not blue)

    Thanks for the info. I have definetly thought about the Viper, seems like a straightforward build too. Would definetly need a computer radio I assume with the V tail. (Wish they had a conventional tail version of it) The only radio with mixing I have is a DX6i. While its probably some sort of fault with my own doing, I seem to have range issues with the AR6200 receiver I have with it. Had it in a sailplane and every time I would get it up to altitude would have range issues and intermittent loss of control. Everything was hooked up property inside, and transmitter was fully charged. I havent quite built up the trust for spektrum yet, but maybe its just me. It works great for the flylite I use in the backyard at home.

    How does the viper do on grass? Thats the only option for me.

    Thanks again

  7. #7

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    RE: Evo .60NX Jettstream muffler (Red one not blue)

    with that dx6 i would think it has programing that could do the Vtail. also if it doesnt you can buy a Vtail mixer that plugs in to the receiver. also one last thing why not just make your own elevator and rudder and make it in to a normal tail plane. very easy to do. just make the elevator out of 1/4 balsa and sand a airfoil into it. then use 3/16th for the rudder and sand a litle airfoil into it.

    They also sell full range receivers for that transmitter.....
    AMA # 126183
    Fly light, fly fast and fly low.


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