RE: Nitro models pusher Bobcat?  
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    • All Forums >> RC Airplanes >> RC Jets >> RE: Nitro models pusher Bobcat?
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    RE: Nitro models pusher Bobcat? - 4/20/2008 12:16:25 PM   
    tizer33



    Posts: 49
    Joined: 3/15/2008
    From: kentKent, UNITED KINGDOM
    Status: offline     		Hi i had kinda made my mind up to get a OS 55ax or should i get the OS 75ax? I just dont know i wanted to keep it as light as possible- But also as fast as poss!
    Regards
    Tim

    (in reply to opjose)
           Post #: 3126

    RE: Nitro models pusher Bobcat? - 4/20/2008 5:09:47 PM   
    Meekskin


     

    Posts: 204
    Joined: 8/1/2007
    From: , CA, USA
    Status: offline     		Go with a Magnum 52,,,,faster than both those you listed. Mine flies 121 mph.

    (in reply to tizer33)
           Post #: 3127

    RE: Nitro models pusher Bobcat? - 4/24/2008 2:23:17 AM   
    Stick Jammer



    Posts: 2251
    Joined: 11/21/2002
    From: Crete, IL, USA
    Status: offline
    quote:

    ORIGINAL: tizer33

    Hi i had kinda made my mind up to get a OS 55ax or should i get the OS 75ax? I just dont know i wanted to keep it as light as possible- But also as fast as poss!
    Regards
    Tim



    I don't think the OS .75AX would be a good choice due to the extra weight and the fact that you probably wouldn't be able to prop it correctly on this plane. Can't go wrong with the .55AX, APC 11x7p, and 15% nitro. A lot of guys have high expectations for record breaking speed from this plane but the fact is this airframe is not really built for speed. It will scoot along rather well with the right setup but at the end of the day it's a glow powered sport jet. [)]

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           Post #: 3128

    RE: Nitro models pusher Bobcat? - 4/24/2008 2:46:48 AM   
    Meekskin


     

    Posts: 204
    Joined: 8/1/2007
    From: , CA, USA
    Status: offline     		nicely stated stick jammer

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           Post #: 3129

    RE: Nitro models pusher Bobcat? - 4/25/2008 4:03:20 PM   
    patzane


     

    Posts: 597
    Joined: 11/11/2005
    From: Glendale, AZ, USA
    Status: offline     		My first one had a TH 75 and push this bobcat around well. I now have the retract ver with an OS 55. The 55 push it well, but I the the speed with the 75 little better. I will stick with the 55 as the engine is new so it still be broken in


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           Post #: 3130

    RE: Nitro models pusher Bobcat? - 4/25/2008 5:20:14 PM   
    opjose



    Posts: 6145
    Joined: 11/26/2005
    From: Poolesville, MD, USA
    Status: offline
    quote:

    ORIGINAL: Stick Jammer


    I don't think the OS .75AX would be a good choice due to the extra weight and the fact that you probably wouldn't be able to prop it correctly on this plane. Can't go wrong with the .55AX, APC 11x7p, and 15% nitro.




    I disagree.

    I'm flying the GMS .76 which has a slightly higher bHP rating ( if you believe the manufacturer ) with the Graupner 11x8P prop, which is a perfect combo.

    This is in the same power and weight range as the OS .75AX.

    I'd stack either engine in this configuration against the .55AX this way.


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    RE: Nitro models pusher Bobcat? - 4/25/2008 5:24:33 PM   
    Meekskin


     

    Posts: 204
    Joined: 8/1/2007
    From: , CA, USA
    Status: offline     		I'll put my bobcat with the Magnum 52 against any 75 motor and I think I will win.

    (in reply to opjose)
           Post #: 3132

    RE: Nitro models pusher Bobcat? - 4/25/2008 5:31:36 PM   
    opjose



    Posts: 6145
    Joined: 11/26/2005
    From: Poolesville, MD, USA
    Status: offline
    quote:

    ORIGINAL: Meekskin

    I'll put my bobcat with the Magnum 52 against any 75 motor and I think I will win.



    You're on!

    With the Graupner 11x8P you'll eat my wake!

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           Post #: 3133

    RE: Nitro models pusher Bobcat? - 4/25/2008 6:05:13 PM   
    Meekskin


     

    Posts: 204
    Joined: 8/1/2007
    From: , CA, USA
    Status: offline     		Opjose,,,I don't thinks so...all you will see is the prop on my bobcat and when we land, you will need 2 rolls of towels to clean the fuel resudue from your plane. LOL.....Our club would love for you to bring your bobcat to our site and fly against the other bobcat s the members have. Actually, you would need to work you way up the chain to get to me.)

    (in reply to opjose)
           Post #: 3134

    RE: Nitro models pusher Bobcat? - 4/25/2008 10:52:42 PM   
    tizer33



    Posts: 49
    Joined: 3/15/2008
    From: kentKent, UNITED KINGDOM
    Status: offline     		Thanks for the info , think im gonna go os55 because if i get a 75 then i should of got a 90 you see.
    What do you mean difficult to prop? because the best size inst available or ground clearence?
    Tim.

    (in reply to Meekskin)
           Post #: 3135

    RE: Nitro models pusher Bobcat? - 4/25/2008 10:55:59 PM   
    tizer33



    Posts: 49
    Joined: 3/15/2008
    From: kentKent, UNITED KINGDOM
    Status: offline     		Meekskin what prop you got on the magnum 52, i had a look for it in the uk but couldnt find it

    (in reply to tizer33)
           Post #: 3136

    RE: Nitro models pusher Bobcat? - 4/25/2008 10:56:26 PM   
    opjose



    Posts: 6145
    Joined: 11/26/2005
    From: Poolesville, MD, USA
    Status: offline     		He believes that it is difficult to get the correct prop for the .75AX in a pusher configuration.

    However the Graupner 11x8P is perfect for a .75 engine.

    It will produce higher airspeed than the 11x7P used on the .55AX.

    Which is why mine will leave his in it's wake.

    [)]

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           Post #: 3137

    RE: Nitro models pusher Bobcat? - 4/25/2008 11:12:59 PM   
    tizer33



    Posts: 49
    Joined: 3/15/2008
    From: kentKent, UNITED KINGDOM
    Status: offline     		The old irvine 40 i got turns a 11*6 shows its still a good un
    Make sure you video the race

    (in reply to opjose)
           Post #: 3138