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    • All Forums >> RC Airplanes >> RC Jets >> RE: Nitro models pusher Bobcat?
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    RE: Nitro models pusher Bobcat? - 8/25/2006 4:10:37 AM   
    S HARRIS


     

    Posts: 386
    Joined: 12/19/2001
    From: NASHVILLE, TN, USA
    Status: offline     		I just talked to Vernon Montgomery down in Miss. He test flew his today with a os 61. He was really excited about the flights. Maybe he'll chime in and tell ya'll about his flights. That make 2 thathave flown that I know of so far.I'm planning a marathon Friday night . Hope to test fly mine on Sunday!!!!!


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           Post #: 201

    RE: Nitro models pusher Bobcat? - 8/25/2006 4:16:20 AM   
    Randy M.


     

    Posts: 822
    Joined: 1/14/2002
    From: Nashville, TN,
    Status: offline     		Marathon!? I guess we will need more beer!!

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           Post #: 202

    RE: Nitro models pusher Bobcat? - 8/25/2006 5:19:35 AM   
    mugenkidd



    Posts: 1498
    Joined: 11/28/2002
    From: Oklahoma City, OK, USA
    Status: offline     		how is everyone securing the wings. I'm not seeing any manufacture suggestions? So I'm thinking I'll just drill and tap the main wing tube. Anyother suggestions or am I overlooking something ?

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           Post #: 203

    RE: Nitro models pusher Bobcat? - 8/25/2006 5:40:29 AM   
    topper5


     

    Posts: 54
    Joined: 1/19/2005
    From: SPRINGVILLE, UT, USA
    Status: offline     		MUGENKIDD: i secured my wings with a screw in the main wing tube, but now IF i could get them off i would glue them permanent.

    MFG says to glue them.

    (in reply to mugenkidd)
           Post #: 204

    RE: Nitro models pusher Bobcat? - 8/25/2006 5:54:43 AM   
    Crazy4Flight



    Posts: 2261
    Joined: 9/15/2002
    From: Milford, MI, USA
    Status: online
    quote:

    ORIGINAL: mugenkidd

    how is everyone securing the wings. I'm not seeing any manufacture suggestions? So I'm thinking I'll just drill and tap the main wing tube. Anyother suggestions or am I overlooking something ?


    Well the NON-Lingual instruction have one use two part epoxi to fix the wing on.


    The wall of the wing tube is too thin to tap and use straight up, soon the threads will strip out. The solution is to place a wood dowel inside the tube's ends. Glue these inplace before drilling and tapping. Remember to harden the threads in the wood with some Cya. The wing will need some attention where the wing bolt hole is, so it on't crush when the bolt is tightened.

    My plan is to install a #8-32 blindnut in the wing just in front of the 4mm anti-rotation pin. Then put a point on a 8-32 socket set screw, put the screw into the nut, and put the wing back on and the point of the screw will mark the fuse where to drill the clearance hole. On the inside of the fuse I will glue in a "fender washer" for the socket head screw to bare down on. A "fender washer" is larger in diameter compared to the standard washer. It will distribute the load better. A 1/4" drive ratchet with a hex bit will be used to tighten the screw.

    Bob

    (in reply to mugenkidd)
           Post #: 205

    RE: Nitro models pusher Bobcat? - 8/25/2006 6:02:03 AM   
    Rube Goldberg


     

    Posts: 216
    Joined: 6/5/2006
    From: Whale Tail, RI, USA
    Status: offline     		I was with Vernon Montgomery down here in MS today for the flight of his Bobcat and the 3rd and 4th flight on my yellow Long EZ 46 I bought from Raidentech. I did a copy and paste from the Long EZ thread here:



    It was also an afternoon for the maiden flight of a fellow club members new "Bobcat" ARF----he used an OS 61FX for power and it really scoots! Word of caution though with that one---apparently they intended for the builder to epoxy the wings onto the fuselage---it uses an aluminum wing tube and small rod (similar to our Long EZs but the small rod is near the leading edge of the wing) yet has NO connection for the wings to the fuselage! While running the engine up on the ground, at full throttle the left wing would seperate from the fuselage about 1/2 to 3/4 inch and stay that way until power was reduced to idle, where the left wing would then slide along the tube/rod back to the side of the fuselage.....and the right wing would then move out the 1/2 to 3/4 inch away from the side of the fuselage! They wound up putting a #64 rubber band around the fuselage pushing it back over the leading edge of the wing to fly it.

    And since you guys with the Bobcat are discussing methods of fixing the wings to the fuselage so you can dismantle the plane, and seeing Vernons' Bobcat today, I thought about the method used in my Sig Somethin' Extra----cut a slot in each side of the fuselage just a bit behind the leading edge of the wing, and screw in and CA a "J" hook to each wing, then use a rubber band between the J hooks to keep the wings tight against the fuselage. That oughta be a simple fix, ya think?

    Dave (as in not the brother of Carl!)


    < Message edited by Rube Goldberg -- 8/25/2006 6:09:38 AM >

    (in reply to Crazy4Flight)
           Post #: 206

    RE: Nitro models pusher Bobcat? - 8/25/2006 6:16:04 AM   
    Crazy4Flight



    Posts: 2261
    Joined: 9/15/2002
    From: Milford, MI, USA
    Status: online
    I never lost a wing in flight and my S.E. had a very high rool rate!

    For the Bobcat you will need long needle nose pliers to reach down and install the rubberband!

    (in reply to Rube Goldberg)
           Post #: 207

    RE: Nitro models pusher Bobcat? - 8/25/2006 6:33:08 AM   
    Rube Goldberg


     

    Posts: 216
    Joined: 6/5/2006
    From: Whale Tail, RI, USA
    Status: offline     		Are you suggesting that reaching down in the fuselage to the same point where you could loop a rubber band around a pair of J hooks would be easier to place a bolt through a fender washer, much less get that bolt started before you put a 1/4" drive ratchet (where you will probably have to have one hand holding the ratchet onto the bolt and the other one working the ratchet back and forth)....easier?

    And you have to do it twice!

    (in reply to Crazy4Flight)
           Post #: 208

    RE: Nitro models pusher Bobcat? - 8/25/2006 6:34:23 AM   
    mugenkidd



    Posts: 1498
    Joined: 11/28/2002
    From: Oklahoma City, OK, USA
    Status: offline
    quote:

    ORIGINAL: Rube Goldberg

    And since you guys with the Bobcat are discussing methods of fixing the wings to the fuselage so you can dismantle the plane, and seeing Vernons' Bobcat today, I thought about the method used in my Sig Somethin' Extra----cut a slot in each side of the fuselage just a bit behind the leading edge of the wing, and screw in and CA a "J" hook to each wing, then use a rubber band between the J hooks to keep the wings tight against the fuselage. That oughta be a simple fix, ya think?

    Dave (as in not the brother of Carl!)



    Great idea, I had a 1/4 scale extra that had a similar wing mounting system, except I ended up using zip ties and it held up great in that bird. I just want a way to remove the wing because knowing myself I'll probally have this bad boy up for sale before too long and making the wings removeable will make it a lot easier to ship.


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    (in reply to Rube Goldberg)
           Post #: 209

    RE: Nitro models pusher Bobcat? - 8/25/2006 3:04:53 PM   
    G-ROOKIE


     

    Posts: 168
    Joined: 6/2/2003
    From: JACKSON, MS, USA
    Status: offline
    quote:

    ORIGINAL: Rube Goldberg

    I was with Vernon Montgomery down here in MS today for the flight of his Bobcat and the 3rd and 4th flight on my yellow Long EZ 46 I bought from Raidentech. I did a copy and paste from the Long EZ thread here:



    It was also an afternoon for the maiden flight of a fellow club members new "Bobcat" ARF----he used an OS 61FX for power and it really scoots! Word of caution though with that one---apparently they intended for the builder to epoxy the wings onto the fuselage---it uses an aluminum wing tube and small rod (similar to our Long EZs but the small rod is near the leading edge of the wing) yet has NO connection for the wings to the fuselage! While running the engine up on the ground, at full throttle the left wing would seperate from the fuselage about 1/2 to 3/4 inch and stay that way until power was reduced to idle, where the left wing would then slide along the tube/rod back to the side of the fuselage.....and the right wing would then move out the 1/2 to 3/4 inch away from the side of the fuselage! They wound up putting a #64 rubber band around the fuselage pushing it back over the leading edge of the wing to fly it.

    And since you guys with the Bobcat are discussing methods of fixing the wings to the fuselage so you can dismantle the plane, and seeing Vernons' Bobcat today, I thought about the method used in my Sig Somethin' Extra----cut a slot in each side of the fuselage just a bit behind the leading edge of the wing, and screw in and CA a "J" hook to each wing, then use a rubber band between the J hooks to keep the wings tight against the fuselage. That oughta be a simple fix, ya think?

    Dave (as in not the brother of Carl!)




    One thing Dave, Vernon had to change is CG from 9 to 9 3/4 inch. from the LE. When he came in to land with the CG at 9" the Bobcat ran out of elevator and the plane pancake into the runway. With the CG at 9 3/4 from the LE it was perfect.

    The 61fx fly's the Bobcat but Vernon and i thinks that the OS 91 fx with the same weight and more power will be the perfect match for the little Bobcat, thats what i am going to put on mine's.

    < Message edited by G-ROOKIE -- 8/25/2006 3:11:17 PM >

    (in reply to Rube Goldberg)
           Post #: 210

    RE: Nitro models pusher Bobcat? - 8/25/2006 4:49:05 PM   
    dragonpilot



    Posts: 312
    Joined: 2/4/2005
    From: Austin, TX, USA
    Status: offline     		Just to clarify, you guys are pinning the wing tubes and adding the hooks and bands at the leading edge, correct?


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    (in reply to G-ROOKIE)
           Post #: 211

    RE: Nitro models pusher Bobcat? - 8/25/2006 4:53:00 PM   
    H.Dale


     

    Posts: 320
    Joined: 2/16/2003
    From: Jackson, MS, USA
    Status: offline     		Here's a suggestion for those guys that are going to put a turbine in one. The bay where you will put the screws or rubber band is full of fuel tanks so you can't do it that way. Vernon says to glue a dowel next to the rib (a square motor mount beam might work better), drill through the block into the aluminum wing tube, thread the tube and secure the wing with a plastic screw. I have a Katana done that way and it works fine. It also has a dowel in the wing tube where it is tapped to better hold it.

    Hal

    (in reply to G-ROOKIE)
           Post #: 212