RE: New 81" GP Super Chipmunk  
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    • All Forums >> RC Airplanes >> ARF or RTF >> RE: New 81" GP Super Chipmunk
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    RE: New 81" GP Super Chipmunk - 12/5/2004 7:52:52 PM   
    DMUCOP



    Posts: 191
    Joined: 10/15/2002
    From: KANSAS CITY, MO, USA
    Status: offline     		What's the most power you guys are going to be able to fit in it with out cutting?

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    Dan "The Chop" Ulledahl Team Hitec

    (in reply to weskel)
           Post #: 151

    RE: New 81" GP Super Chipmunk - 12/5/2004 11:14:50 PM   
    PlaneKrazee



    Posts: 3579
    Joined: 5/15/2002
    From: Westerly, RI, USA
    Status: offline     		DMUCOP,

    The OS 160FX will barely fit without cutting the cowl if you mount the engine at 8:30 and use 3/8" a spacer behind the prop. That is the most powerful engine I would use in this plane. It is smooth and good on fuel.

    I would not use a twin on the plane. The cowl will have to be cut in two to get it over the cylinders with both cylinders sticking out.

    < Message edited by Skypilot_one -- 12/8/2004 12:14:40 PM >

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    AMA11123

    (in reply to DMUCOP)
           Post #: 152

    RE: New 81" GP Super Chipmunk - 12/6/2004 12:52:56 AM   
    jimmyjoe


     

    Posts: 139
    Joined: 6/17/2004
    From: Kokomo, IN, USA
    Status: offline     		Broke my Saito 150 in today! That baby was rocking and rolling. If anyone is mounting anything inside the cockpit be sure to glue it down good. Plane looks and feels awesome. How much weight is everyone ending up with. I am going to have to mount mine a little different. Is anyone putting the weight in the cowl?

    (in reply to PlaneKrazee)
           Post #: 153

    RE: New 81" GP Super Chipmunk - 12/6/2004 4:18:38 AM   
    gunny11



    Posts: 848
    Joined: 12/12/2003
    From: babylon, NY, USA
    Status: offline     		Skypilot, thanks for the info. Inverted at 7 o'clock 1/4" to 3/8" back with spacer. Which muffler are you using? Stock or Slimline inverted pitts.

    Thanks,

    Gunny

    Not started it yet.

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           Post #: 154

    RE: New 81" GP Super Chipmunk - 12/6/2004 4:23:20 AM   
    AirTech



    Posts: 420
    Joined: 1/28/2004
    From: Allen, TX, USA
    Status: offline     		Hey Jim,

    Anything came loose inside the cockpit?

    (in reply to jimmyjoe)
           Post #: 155

    RE: New 81" GP Super Chipmunk - 12/6/2004 7:28:45 AM   
    PlaneKrazee



    Posts: 3579
    Joined: 5/15/2002
    From: Westerly, RI, USA
    Status: offline     		Gunny11,

    I am using a Enya 1.55 in my plane right now. I have a 160FX that I used to check the fit if I wanted to use that engine. If I went with the FX I would probably use a Macs header and a small canister from Aircraft International or make my own from 2" aluminum candle moulds and flat stock drilled for baffles. I purchased some fluxless rod for brazing aluminum and it works pretty well.

    Just double checked. The engine needs to be mounted at 8:30, almost horizontal not vertical.

    < Message edited by Skypilot_one -- 12/6/2004 5:04:39 PM >

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           Post #: 156

    RE: New 81" GP Super Chipmunk - 12/6/2004 12:31:06 PM   
    jimmyjoe


     

    Posts: 139
    Joined: 6/17/2004
    From: Kokomo, IN, USA
    Status: offline     		Yeah unfortunately the on board glow LED vibrated out, and the pilots cord came unglued from the cockpit. No big deal! I think that with some silicone the LED will be fixed, but the headset cord is no big deal.

    (in reply to AirTech)
           Post #: 157

    RE: New 81" GP Super Chipmunk - 12/6/2004 4:12:43 PM   
    pettit



    Posts: 2164
    Joined: 12/19/2001
    From: Durham, NC, USA
    Status: offline     		OK, it flew. And quite nicely too.

    OS 120, 12 lbs 10 ounces dry. Slow or fast, high or low and anything in between.

    It does a really nice spin too.

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    Dick Pettit
    Associate Editor, R/C REPORT Magazine
    "You Can Buy Better,
    But You Can't Pay More"

    (in reply to jimmyjoe)
           Post #: 158

    RE: New 81" GP Super Chipmunk - 12/6/2004 4:15:19 PM   
    ptgarcia



    Posts: 2057
    Joined: 6/19/2002
    From: Fontana, CA, USA
    Status: offline     		jimmyjoe,

    Once you get that 150 broken in and the low speed needle adjusted properly your Saito will settle down nicely and become a gem of an engine. If you have already run a tank or two through it I would start closing the low speed needle a 1/4 turn or so for each tank you burn. Good luck!

    _____________________________

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    Corona RC Club

    (in reply to jimmyjoe)
           Post #: 159

    RE: New 81" GP Super Chipmunk - 12/6/2004 6:30:26 PM   
    Thomas B.


     

    Posts: 8
    Joined: 3/7/2002
    From: Taby, SWEDEN
    Status: offline     		I saw that Gunny II and Skypilot one both hade planes on using the OS160 twin. I have a Saito 182TD I am planning to use. It is just 2mm (0,080”) wider the OS but it has the carburettors on top of the engine. Is the cowl close to the top of the engine? Would there be a risk that I must cut a hole on top of the cowl to clear the carburettors?

    Best regards
    Thomas

    (in reply to weskel)
           Post #: 160

    RE: New 81" GP Super Chipmunk - 12/6/2004 7:19:59 PM   
    PlaneKrazee



    Posts: 3579
    Joined: 5/15/2002
    From: Westerly, RI, USA
    Status: offline     		Thomas B.,

    Please measure from the top of the carbs to the centerline of the engine and the from the prop driver to the front of the carbs. I will give you an answer. I am not using the 160FT, using Enya R1.55.

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    AMA11123

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           Post #: 161

    RE: New 81" GP Super Chipmunk - 12/6/2004 10:13:40 PM   
    jimmyjoe


     

    Posts: 139
    Joined: 6/17/2004
    From: Kokomo, IN, USA
    Status: offline     		thanks for the input on the Saito@!

    (in reply to ptgarcia)
           Post #: 162

    RE: New 81" GP Super Chipmunk - 12/7/2004 1:45:50 AM   
    4 stroken ron



    Posts: 1414
    Joined: 12/6/2001
    From: Grinnell , IA, USA
    Status: offline     		Oh yeah, Ya might know Dick would be the first with the flight report. He doesn't have anything else to do anyway.
    I AM a subscriber!!!!
    Ron


    quote:

    ORIGINAL: pettit

    OK, it flew. And quite nicely too.

    OS 120, 12 lbs 10 ounces dry. Slow or fast, high or low and anything in between.

    It does a really nice spin too.

    (in reply to pettit)
           Post #: 163

    RE: New 81" GP Super Chipmunk - 12/7/2004 4:39:05 AM   
    gunny11



    Posts: 848
    Joined: 12/12/2003
    From: babylon, NY, USA
    Status: offline     		O.K. Thanks again for the info Skypilot.

    Pettit, How's the vertical? Nice big loops can it handle?.

    Thanks,

    Gunny

    BTW. Nice shots

    < Message edited by gunny11 -- 12/7/2004 4:41:50 AM >

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           Post #: 164