RE: u-can-do 60  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
More Resources on the
U-Can-Do 3D ARF - 61
  • 1 Active Classified Ad(s)
  • Read Full Review
  • See User Ratings
  • Suggest Compatible Equip.
  • Check for Retailers
  • Discussions on this Product


    • All Forums >> RC Airplanes >> ARF or RTF >> RE: u-can-do 60
    Page: <<   < prev  7 8 [9] 10 11 12 13 14 15 16   next >   >>  

    Login
    Message << Older Topic   Newer Topic >>
    RE: u-can-do 60 - 3/10/2004 7:32:34 AM   
    lord lucan



    Posts: 716
    Joined: 1/16/2004
    From: England, UNITED KINGDOM
    Status: offline     		JW ...
    .91FX...? not had any trouble with this beast have ya....2.8.BHP ...This is lawnmower power....Just put a new .91FX in the GP Extra....then started hearing all this yapping .."Trouble with the .91FX....." ..." Worst O.S. engine ...." nonsense ..Cheer me up ... tell me its ok !

    (in reply to autoguns)
           Post #: 201

    RE: u-can-do 60 - 3/10/2004 2:28:43 PM   
    Rocketman_



    Posts: 795
    Joined: 10/15/2003
    From: , MA, USA
    Status: offline     		Cheer up!
    The OS 91FX is a great ringed piston engine, not one of OS's peeling plated cylinder wall engines. I have three and they all start easily and consistently run fine.
    I have two UCD 60's powered by OS 91FX's and the other one is in a Hobbico Extra 300 AWARF.
    Who knows, maybe I got the only three good ones. What is the likelihood of that?

    (in reply to lord lucan)
           Post #: 202

    RE: u-can-do 60 - 3/11/2004 3:52:37 AM   
    rfw1953



    Posts: 1346
    Joined: 7/9/2002
    From: Hampton Cove, AL, USA
    Status: offline     		Jeff, loved the winter pictures with the skies. You are set for the outback.....

    Joe - the fuel tank located so far aft would concern me. I know you are well ahead of any CG issues, but you have to be pushing it a little. Hope this works with no dead weight up front. Looks like you are working on your best UCD version to date. How many is this so far?

    The Space Walker. Now thats been around for a while. In fact I nearly bought one of these before buying the UCD. Nice all around fun airplane.


    _____________________________

    Good Luck and Good Flying,
    Roger

    (in reply to AcroJo)
           Post #: 203

    RE: u-can-do 60 - 3/11/2004 4:29:32 AM   
    autoguns



    Posts: 758
    Joined: 3/9/2003
    From: ANCH, AK, USA
    Status: offline     		It'll be okay,I have 2 of the OS91FX engine's ,One is NIB and one is in a GP shoestring, It has had some tuning problem's at mid range , but the idel and top end are sweet.....JW
    quote:

    ORIGINAL: lord lucan

    JW ...
    .91FX...? not had any trouble with this beast have ya....2.8.BHP ...This is lawnmower power....Just put a new .91FX in the GP Extra....then started hearing all this yapping .."Trouble with the .91FX....." ..." Worst O.S. engine ...." nonsense ..Cheer me up ... tell me its ok !

    (in reply to lord lucan)
           Post #: 204

    RE: u-can-do 60 - 3/11/2004 4:36:58 AM   
    autoguns



    Posts: 758
    Joined: 3/9/2003
    From: ANCH, AK, USA
    Status: offline     		Hi Roger, Ya gotta love a cub on ski's ,This is one of the funnest plane's to fly, Iv'e ever had .. ..The spacewalker is almost done , I can't wait to fly it .....JW
    quote:

    ORIGINAL: rfw1953

    Jeff, loved the winter pictures with the skies. You are set for the outback.....

    Joe - the fuel tank located so far aft would concern me. I know you are well ahead of any CG issues, but you have to be pushing it a little. Hope this works with no dead weight up front. Looks like you are working on your best UCD version to date. How many is this so far?

    The Space Walker. Now thats been around for a while. In fact I nearly bought one of these before buying the UCD. Nice all around fun airplane.

    (in reply to rfw1953)
           Post #: 205

    RE: u-can-do 60 - 3/11/2004 7:33:49 AM   
    lord lucan



    Posts: 716
    Joined: 1/16/2004
    From: England, UNITED KINGDOM
    Status: offline     		Roger ,Joe & Co...
    Just read Rogers note about the tank concerns...before i put mine there ...well.....had i better not...? i thought that if you coul put your tank over the C of G ..so much the better...? cheers Dave.

    (in reply to AcroJo)
           Post #: 206

    RE: u-can-do 60 - 3/11/2004 1:41:44 PM   
    AcroJo



    Posts: 2279
    Joined: 1/25/2003
    From: Clarks Summit, PA, USA
    Status: offline     		Roger, This one is "ol' # 4". Long story. With extensive and frustrating checks and double checks of the radio components and each time everything checked out I might add, it took my first two UCD's to find out that I had an intermittent glitch. OUCH! Both had engine damage to make matters worse. So........... trashed all the Futaba gear and in #3 installed all new JR equippment, stem to stern. I'm all set, what could go wrong. A dozen flights with the new setup and loving it, the crystal popped out of the RX !!!!!! As anal as I am about this stuff I never knew you should tape the crystal in. Oh well. As far as the tank and CG. On 40 sized craft the center of the tank and the CG are within 6 inches of each other. On this long fuse the center of the tank is now 10+ inches of seperation. As the fuel draws down, I've experienced a good deal of chenge in the CG in flight. On the last three my 5 cell battery was always in the aft. of the compartment. So if it has to go forward its no big deal. Now the only change is the weight of the plane as it burns up fuel. With the tank on the CG you still have the option of makeing the CG as mild or wild as you want. Joe

    _____________________________

    Stranger in a strange place.

    (in reply to lord lucan)
           Post #: 207

    RE: u-can-do 60 - 3/11/2004 3:41:09 PM   
    rfw1953



    Posts: 1346
    Joined: 7/9/2002
    From: Hampton Cove, AL, USA
    Status: offline     		Good morning guys.

    Joe, as always, I learned something new today that I had never thought about. I've never taped the crystal in place, but it sure does make sense now that I know about it. I do use Futaba in nearly all my planes. Using Hitec in the UCD with Futaba Rx. Interestingly enough, the only servo failure I've ever had was with one of the new Hitec's right out of the box. Also had a cracked ceramic filter in a Futaba Rx. once that cost me Giles-II. Futaba said the filter cracked from a hard landing, or from the crash. Go figure! I've never used JR, but many of the guys at our field use JR and very happy with their products. Frankly, it seems that any of the known name brands produce good quality products with few failures, but nothing is ever 100%.

    Lord L, Joe is a bit more aggressive in placing the tank this far aft, but it appears to work well for him, though he does state that as the fuel drains from the tank this becomes more noticeable concerning the balance of the airplane. If I were going to do this I would first want the CG just a bit nose heavy for the maiden flight, and until I felt comfortable with the plane before moving it back. As the old saying goes, a slightly nose heavy plane will fly just fine, but a tail-heavy airplane won't fly. If you feel comfortable with flying a maiden flight with the tank in a more aggressive CG position then do it, but be prepared for the fuel drain changing the flying characteristics, which could catch a pilot off guard at first. Placing the tank in this position would certainly make the CG check more critical on a plane that has never been flown. I'm not questioning the position of it as much as I am simply wanting to make sure you are prepared for the unexpected with a plane you haven't flown yet. Would hate for you to get it up in the air and find it's squirrelly due to the CG becoming tail heavy as the fuel drains.


    _____________________________

    Good Luck and Good Flying,
    Roger

    (in reply to AcroJo)
           Post #: 208

    RE: u-can-do 60 - 3/11/2004 3:59:10 PM   
    AcroJo



    Posts: 2279
    Joined: 1/25/2003
    From: Clarks Summit, PA, USA
    Status: offline     		Roger, Thats just it, my first were stock setup so I am now familiar with what to expect. Get out and fly, the planes characteristics are mesmerising to the point that you may well be low on fuel by the time you realize that you have to bring it in. On doing some landings right off with a full load of fuel its very sweet, but just so your not wondering as to why it may not handle on aproach as it did earlier with a full tank. Let me specify that there is not a difference so great that it won't land just as easily when empty but keyed to this knowledge you may now pick up on it. It was much more evident once my CG was beyond 5 1/2" On landings, this plane makes any pilot look good. Joe

    P.S. 2 strokes put out more pressure than 4 strokes, but still not enough pressure to push fuel from a tank at a greater distance. If this were not the case, all planes would come with the tank on the CG right from the manufacturer.

    < Message edited by cumn thru -- 3/11/2004 11:06:18 AM >

    _____________________________

    Stranger in a strange place.

    (in reply to rfw1953)
           Post #: 209

    RE: RE: u-can-do 60 - 3/13/2004 2:07:44 AM   
    Planeclothes


     

    Posts: 428
    Joined: 7/12/2003
    From: Orlando, FL,
    Status: offline     		Hi, there. I just bought a u-can-do 60, it's still in the box, but something in the manual caught my attention. According to the instructions, if I don't have ailevator programming in my radio, I should use a reversing harness for one of the elevator servos. Now, looking at the pictures on page 19, showing a setup without mixing, it clearly shows elevator servos at different locations relative to the elevators with the servo arms in opposite directions. Obviously, with this kind of setup (just like my now departed Laser 3D), there's no need for a servo reverser. I have a computerized radio but it has no ailevator capabilities,and I do have a servo reverser but I don't know if I should try the manual's setup first. Please advise. Thanks.

    (in reply to AcroJo)
           Post #: 210

    RE: RE: u-can-do 60 - 3/13/2004 4:22:14 AM   
    autoguns



    Posts: 758
    Joined: 3/9/2003
    From: ANCH, AK, USA
    Status: offline     		Hi , I don't have a reversing harness ......JW

    Attachments
    Click to see fullsize image.
    Click for fullsize         		Click to see fullsize image.
    Click for fullsize

    (in reply to Planeclothes)
           Post #: 211

    RE: RE: u-can-do 60 - 3/13/2004 4:02:27 PM   
    lord lucan



    Posts: 716
    Joined: 1/16/2004
    From: England, UNITED KINGDOM
    Status: offline     		J.W..... now your in for it...! ...need to talk to ya awl later ....i'm on " Drape duty "...again, Aaarrrgghhh....! This C of G thing.... dont go away ..! Dave

    < Message edited by lord lucan -- 3/13/2004 4:03:32 PM >

    (in reply to autoguns)
           Post #: 212

    RE: u-can-do 60 - 3/13/2004 5:45:47 PM   
    autoguns



    Posts: 758
    Joined: 3/9/2003
    From: ANCH, AK, USA
    Status: offline     		The plane is balanced with the tank empty , so putting the tank on the CG is fine, the plane won't be adversely affected when fuel weight is added ...It's on the CG line, Iv'e filled the tank on mine full up ,took off, turned and landed still full up... now adding the 14oz's foreword of the CG when the tank is full , and the plane still handled great ,Correct me if i'm wrong, but if the plane is hovering the tail act's as a pendulum , Now if all gear is centered in the middle of that pendulum, wouldn't the plane fly better?... I don't see any problem's mounting the tank on the line, I only see Positive's in doing that.....A very good contribution to the Ministry Of Aviation..... ........JW
    quote:

    ORIGINAL: cumn thru

    . As far as the tank and CG. On 40 sized craft the center of the tank and the CG are within 6 inches of each other. On this long fuse the center of the tank is now 10+ inches of seperation. As the fuel draws down, I've experienced a good deal of chenge in the CG in flight. On the last three my 5 cell battery was always in the aft. of the compartment. So if it has to go forward its no big deal. Now the only change is the weight of the plane as it burns up fuel. With the tank on the CG you still have the option of makeing the CG as mild or wild as you want. Joe

    (in reply to AcroJo)