RE: Composite-Arf 33% Gee Bee R2 - First Flight - Pics - Videos - L@@K  
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    • All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> RE: Composite-Arf 33% Gee Bee R2 - First Flight - Pics - Videos - L@@K
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    RE: Composite-Arf 33% Gee Bee R2 - First Flight - ... - 5/10/2008 11:26:19 PM   
    RichardGee



    Posts: 110
    Joined: 10/10/2002
    From: Dixon, CA, USA
    Status: offline     		Jim,
    I have mixed throttle/rudder per instructions such that at full throttle, rudder is deflected (right) at exact angle as molded-in vertical fin. As I throttle down to idle, rudder returns to neutral.
    Have you found this to be at all close to what actual flight conditions require to offset P-factor??
    I have also installed gyro on rudder as I have found this a helpful addition to any short-coupled airplane.
    I agree that DA100 would have been sufficient power, but it appears my CARF R2 will need every bit of nose weight available via the DA150.

    btw: Wayne Parrish reported his was clocked at 138 mph w/3W 120 on the nose.

    _____________________________

    RC Modeling is for truly talented individuals... for everyone else, there's video games.

    (in reply to dirtydingus)
           Post #: 126

    RE: Composite-Arf 33% Gee Bee R2 - First Flight - ... - 5/11/2008 12:13:24 AM   
    dirtydingus


     

    Posts: 67
    Joined: 8/8/2007
    From: west palm beach, FL, USA
    Status: offline     		RichardGee,
    I found that setting to be right on. I also found that the 50mm right and left rudder deflection was way to much, the rudder on this thing is wicked powerful. I have 25mm on each side and that is a little overkill. As for speed, Wayne's Gee Bee is as fast as mine with the DA 150. I was clocked at 138 - 139 and 140.7 with no wind and a very shallow dive. Thats haulin' but for a big tub like this.
    Jim

    (in reply to RichardGee)
           Post #: 127

    RE: Composite-Arf 33% Gee Bee R2 - First Flight - ... - 5/11/2008 12:37:22 AM   
    RichardGee



    Posts: 110
    Joined: 10/10/2002
    From: Dixon, CA, USA
    Status: offline     		I kind of thought the instructions "50mm each side" were off the mark. As a matter of fact, you would likey concur that the instructions in general leave much to the imagination...
    I also paid no attention to the flying wire measurements and instead, used string to get the exact distance and cut the SS flying wire material accordingly.

    I found my 25% R2 to have a VERY sensitive elevator, until it got close to stall speed, then, zippity do dah. Does the same hold true for this bird?

    Do you wheel land or 3 point?
    This seems to be a point of controversy, as Adrian Page swears a 3 point landing is the least dangerous... and Byron gave the same instructions for their R2.
    However, I found a wheel landing to be not only scale, but the least risky in terms of an inadvertant stall or aileron reversal by slowing down too much.
    Your experience?

    What throws are you using for elevator and aileron?

    Do you leave all flying wires attached to fuselage when transporting?

    What propeller are you spinning on the DA150?


    < Message edited by RichardGee -- 5/11/2008 12:41:31 AM >

    _____________________________

    RC Modeling is for truly talented individuals... for everyone else, there's video games.

    (in reply to dirtydingus)
           Post #: 128

    RE: Composite-Arf 33% Gee Bee R2 - First Flight - ... - 5/11/2008 1:26:03 AM   
    dirtydingus


     

    Posts: 67
    Joined: 8/8/2007
    From: west palm beach, FL, USA
    Status: offline     		RichardGee
    3 point always for me but I may try main wheel if I had another 500' of runway.
    Not sure of other throws, will measure them tomorrow.
    Yes, I leave the wires on the fuse. and tuck them in where the gear meets the center section.
    I am running a 28x14 Xoar but I may switch back to the Mejzlik 30x12 for better vertical.

    (in reply to RichardGee)
           Post #: 129

    RE: Composite-Arf 33% Gee Bee R2 - First Flight -... - 5/11/2008 8:12:55 AM   
    PTS


     

    Posts: 423
    Joined: 10/25/2003
    From: ROSWELL, NM, USA
    Status: offline     		I started to do some work on the GB this weekend primarily repairing a little shipping damage on the trailing edge of the rudder post with one side being crushed about the size of a dime, and the other side cracked gel coat. I would have been disgruntled if I did not want to paint the plane. I found some great composite repair from Aircraft Spruce called SUPERFIL http://www.aircraftspruce.com/catalog/cmpages/superfil.php. This stuff is light, extremely tough, and sands great. Also after reading I will do a rebuild on the CA struts as well. I will also be using a set of 7" CB Heavy Duty wheels that I purchased from SIG. I will post pics and weight of these tomorrow.

    I do plan on running the RCS 250 Radial but I have to come up with a way to convince the wife to use vacation money to buy the engine. Now my priorities are straight...

    Perry

    < Message edited by PTS -- 5/11/2008 8:16:02 AM >

    (in reply to dirtydingus)
           Post #: 130

    RE: Composite-Arf 33% Gee Bee R2 - First Flight -... - 5/11/2008 3:29:24 PM   
    quist



    Posts: 1606
    Joined: 1/8/2002
    From: Glendale, AZ, USA
    Status: offline     		Perry, Modelers can also purchase Superfil from Don's Hobby shop in Kansas. It's only draw back is cure time.

    (in reply to PTS)
           Post #: 131

    RE: Composite-Arf 33% Gee Bee R2 - First Flight - ... - 5/12/2008 4:14:41 AM   
    dwr


     

    Posts: 225
    Joined: 10/29/2004
    From: ft.myers, FL, USA
    Status: offline     		Jim, thanks for the flight info. Very interesting about the landing speeds taken with the radar gun. It is great to get all this information on an aircraft has more than a few ways to bite you.
    This thread it great. DWR.

    (in reply to dirtydingus)
           Post #: 132

    RE: Composite-Arf 33% Gee Bee R2 - First Flight -... - 5/12/2008 1:49:19 PM   
    CHAWKJIM



    Posts: 129
    Joined: 6/16/2007
    From: Cape Coral, FL, USA
    Status: offline     		I have been repairing autos my whole life . When I repair composite I use any type polyester filler, you can get this from any auto paint store, they have several brands to chose from,I prefer the cheaper one, they always seem to sand easier. It also has little to no pin holes.

    (in reply to PTS)
           Post #: 133

    RE: Composite-Arf 33% Gee Bee R2 - First Flight - ... - 5/12/2008 4:48:03 PM   
    hotrodblazer


     

    Posts: 15
    Joined: 9/10/2006
    From: Nederland, TX, USA
    Status: offline     		Jim, I'm thinking about your statement that you three point land your Gee Bee,but with the modified tailgear that you have, it sits at a angle of attack similar to a plane up on the mains only.Your tailwheel is on the ground much sooner than one with a scale setup would be.This probably enhances control on landing, especially the zone between loosing rudder effectiveness and gaining tailwheel steering control.

    (in reply to dirtydingus)
           Post #: 134

    RE: Composite-Arf 33% Gee Bee R2 - First Flight - ... - 5/12/2008 6:14:40 PM   
    CHAWKJIM



    Posts: 129
    Joined: 6/16/2007
    From: Cape Coral, FL, USA
    Status: offline     		Is that carbon fiber mat were the antenna is routed?

    (in reply to RichardGee)
           Post #: 135

    RE: Composite-Arf 33% Gee Bee R2 - First Flight - ... - 5/12/2008 7:14:44 PM   
    RichardGee



    Posts: 110
    Joined: 10/10/2002
    From: Dixon, CA, USA
    Status: offline     		Yes, my antenna is routed inside fuse and YES the fuse does have some CF matting.
    I am aware of the potential signal problems and am prepared to re-route my antenna if necessary.

    This is my second CompARF. I am currently flying a 2.6M Extra 260, same Futaba RX; antenna completely inside fuselage and have experienced rock solid radio performance, regardless of channel; and regardless of other aircraft broadcasting.
    With engine running (DA100) I can do an antenna-collapsed range check at over 50 yards with no issues.

    I am hopeful the Gee Bee will be similar.

    _____________________________

    RC Modeling is for truly talented individuals... for everyone else, there's video games.

    (in reply to CHAWKJIM)
           Post #: 136

    RE: Composite-Arf 33% Gee Bee R2 - First Flight - ... - 5/12/2008 9:51:51 PM   
    dirtydingus


     

    Posts: 67
    Joined: 8/8/2007
    From: west palm beach, FL, USA
    Status: offline     		hotrodblazer
    Most of the more successful C-Arf gee bee flyers I have seen, use a very large tailwheel with the original set up for better control and that also puts the tail up about where mine is. The only drawback I can see is that it may be a bit more susceptible to a nose over. When I taxi through the grass I have to be very carefull. The tail has bounced up once enough to strike the prop($60). I talked to someone a while back who was using a 3.5" tailwheel with great succsess. This picture shows one at least that big. Jim

    Attachments
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    (in reply to hotrodblazer)
           Post #: 137

    RE: Composite-Arf 33% Gee Bee R2 - First Flight - ... - 5/12/2008 10:41:48 PM   
    RichardGee



    Posts: 110
    Joined: 10/10/2002
    From: Dixon, CA, USA
    Status: offline     		Maybe it's just me - and I readily admit to being a "purist" - but if I have to begin to deviate from the scale outline of the Gee Bee R2 in an effort to make it handle better, I lose interest quickly.
    There are plenty of non-scale Gee Bees available or a modeler can scratch build one, altering the planform as much as needed to arrive at a better handling airplane, but then it's no longer a Gee Bee R2.

    Other than better brakes, Delmar Benjamin and Steve Wolfe chose to adhere as closely as possible to the scale fidelity of the original R2.
    I feel similarly.

    It was the exact outline of this 31% CompARF that first attracted me, followed by the many positive performance and kit reports.
    Don't want to start a controversy, but my goal with this aiplane is to reproduce a scale model of the real R2 and to adapt my flying skills (not the model) to accomodate.


    _____________________________

    RC Modeling is for truly talented individuals... for everyone else, there's video games.

    (in reply to dirtydingus)
           Post #: 138

    RE: Composite-Arf 33% Gee Bee R2 - First Flight - ... - 5/12/2008 11:39:19 PM   
    dirtydingus


     

    Posts: 67
    Joined: 8/8/2007
    From: west palm beach, FL, USA
    Status: offline     		I could not agree more, the two things I have changed on this plane (spinner and tailwheel) Have been nothing but a headache. If I had it to do all over I would leave it the way it was meant to be. I have even considered changing it back but the weight penalty of a re-paint would be significant. This plane handles better on the ground than you might think, in my opinion keeping the tailwheel assembly scale will be a plus.
    On the other hand, it would be a pretty bland world if we all subscribed to a cookie cutter mentality.

    (in reply to RichardGee)