RE: u-can-do 60  
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    • All Forums >> RC Airplanes >> ARF or RTF >> RE: u-can-do 60
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    RE: u-can-do 60 - 2/3/2004 4:32:31 AM   
    kroflite54


     

    Posts: 170
    Joined: 1/7/2002
    From: warren, OH, USA
    Status: offline     		Thanks RFW for the very informative replies.

    Just want to pass an article i read onto you and anyone else using an inverted four stroke.From what i read 'there is a problems with being able to drain the crankcase oil sump on an inverted fs engine.The atricle says to get a 1oz tank and connect a fuel line from the tank to the crankcase drain.fasten the tank somwhere on the front near the engine.when engine is running it blows the excess oil into the tank.when tank gets near full 'just drain it.i think i'll try this myself .just an article i ran across.

    ken

    (in reply to rfw1953)
           Post #: 26

    RE: u-can-do 60 (reply to Lord Lucan) - 2/3/2004 2:03:38 PM   
    AcroJo



    Posts: 2279
    Joined: 1/25/2003
    From: Clarks Summit, PA, USA
    Status: offline
    quote:

    ORIGINAL: rfw1953

    Matt, get your butt in gear and get your birds finished. I thought I took a long time to assemble one. Put those pictures on the Giles thread and let me see how she finished out for you. By the way, I didn't put any offset in my U-Can-Do. Joe got me thinking about this. I hope I didn't miss something. I went back to the directions and they don't call for any. The mount I am using doesn't have any either. Hm.........


    Lord, The reason for GP indicating no need for right thrust is the fact that they engineered an offset in the vertical stab. It can be recognized with some measurements from the outside of the fuse into the stab. It equals app 1/16" which we discussed in depth on the other UCD thread. In reality, with some of the larger engines it has proved to be inadequet to say the least. Requireing the minimum of at least 3 degrees. Joe

    _____________________________

    Stranger in a strange place.

    (in reply to rfw1953)
           Post #: 27

    RE: u-can-do 60 (reply to Lord Lucan) - 2/3/2004 10:14:48 PM   
    lord lucan



    Posts: 716
    Joined: 1/16/2004
    From: England, UNITED KINGDOM
    Status: offline     		Roger...Matt...Joe ! Right,gona have a walk round this mixing thing ...Roger,exactly what functions do you believe i should i end up mixing ? and on / off switchable with what ? is this going to give me what you guys call 'ailevators' ? could have slight English/American 'technical missalignments' ? ! no pblem though ! makes it all the more interesting ! The Futaba manual is slightly different in how it describes this process...your instructions seem clearer & easier to grasp .... right...to have begun is half the task... "I may be gone sometime...!"
    regards ...Dave

    (in reply to rfw1953)
           Post #: 28

    RE: u-can-do 60 (reply to Lord Lucan) - 2/3/2004 10:37:16 PM   
    AcroJo



    Posts: 2279
    Joined: 1/25/2003
    From: Clarks Summit, PA, USA
    Status: offline     		Dave, Check out the 3D section on Horrizon Hobby's site. They give detailed info on technique and set up. Lotsa good stuff. Joe

    < Message edited by cumn thru -- 2/3/2004 5:39:25 PM >

    _____________________________

    Stranger in a strange place.

    (in reply to lord lucan)
           Post #: 29

    RE:Maiden Flight Today - 2/5/2004 12:47:57 AM  1 votes
    rfw1953



    Posts: 1346
    Joined: 7/9/2002
    From: Hampton Cove, AL, USA
    Status: offline     		The temp hit 50 around 2:00 so I headed out to the field for the maiden flight. I had adjusted the servo horns so they were pointing towards the stab and then figured out a way to adjust for the off centered elevator servos. I adjusted the control horns so the push/pull rods were level with the servo horns and then adjusted the control horn connector to the short push/pull rod to take out the difference in the throw. For fine-tuning I used sub-trim to get them perfect on one servo only. This mechanical with sub-trim adjustment allowed me then to use equal throw programming when mixing in the Tx. The benefit is that I now can adjust the throws in the Tx. without having to counter for the servos being off centered. The wonders of a programmable Tx.

    The maiden flight went very well. I had my friend Chuck along for help just in case. We had a few mishaps form the get go. For some reason that I haven't determined yet, the remote glow failed after starting the engine one time. Will have to check this out to see if their is a ground issue or if the lead into the remote glow came lose. Then one of my mounting blocks for the cowling came lose when starting the engine. Hm....poor epoxy job on my part but easily fixable.

    I had 100% throws to ailerons and 60% to the elevators with 100% to the rudder. Way too much aileron for the low settings. She would spin on a dime and was very touchy on the ailerons. Brought the ailerons back down to 55%, changed the rudder to 110% and left the elevators at 60%, so I can get a good feel for the airplane. Even with these settings she was very responsive.

    I didn't try anything wild and crazy on on my first flights because I wanted to get the feel for the airplane. The other stuff will come. Just flew her around for a while to let the engine break in and to get the feel for how she flies. Take off was simple at about 1/2 throttle in about 30 feet she was airborne. Tracks very well down the runway even in an 8-10 mph crosswind. Very stable. Flies very easily at very low speeds and goes easily vertical with the 91 Surpass. Nice engine for this airplane IMHO. Landing was just as gentle and easy. She will float with the elevators holding the nose up to make a nice touch down. Just a nice overall airplane, but then I took it very easy on my first flights.

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    _____________________________

    Good Luck and Good Flying,
    Roger

    (in reply to AcroJo)
           Post #: 30

    RE: RE:Maiden Flight Today - 2/5/2004 1:06:29 AM   
    AcroJo



    Posts: 2279
    Joined: 1/25/2003
    From: Clarks Summit, PA, USA
    Status: offline     		Roger, Congrats man. Looks great! And you brought it home to boot. Try going lower on your rates, don't let this kitten fool you. It can get out of attitude just as quick as it responds. Ease into the higher settings. Good luck and keep us posted. Joe

    _____________________________

    Stranger in a strange place.

    (in reply to rfw1953)
           Post #: 31

    RE: u-can-do 60 - 2/8/2004 5:45:25 AM   
    lord lucan



    Posts: 716
    Joined: 1/16/2004
    From: England, UNITED KINGDOM
    Status: offline     		Gents...Programming sorted,spot on ! Thx... Oh, while i think about it,to kill any worries bout the antenna down the centre of the fuze,use ferrite rings on those 3 lonnnng sevo ext'ns (make ext'n yourself to suit )...using this on my GP extra 300 .60 bird, as well as swappin the steel push rods for C/F ,will allso use ferrite rings on aileron servo ext'ns...Dave

    (in reply to AcroJo)
           Post #: 32

    RE: u-can-do 60 - 2/8/2004 6:14:45 AM   
    rfw1953



    Posts: 1346
    Joined: 7/9/2002
    From: Hampton Cove, AL, USA
    Status: offline     		Ferret rings? Have any pictures? Haven't heard of these. I kept the antenna in the fuse, did a long range check with no interference noted.

    I do have a correction to make. I stated in my maiden flight post that I had tried to compensate for the elevator servos being offset by setting the control arm connectors at different levels on the control arms. This was correct. For fine-tuning I had used sub-trim to get the elevators perfect. This too was accurate, but not necessary. Had I noticed earlier then I would have realized that the knob on channel 7 was not centered. It was off center one click. Once I centered it, and adjusted mechanically, I was able to take out all of the sub-trim. Da. No big deal, but the sub-trim was not necessary had I first made sure the knobs were centered.

    < Message edited by rfw1953 -- 2/8/2004 12:20:31 AM >


    _____________________________

    Good Luck and Good Flying,
    Roger

    (in reply to lord lucan)
           Post #: 33

    RE: u-can-do 60 - 2/8/2004 1:29:33 PM   
    lord lucan



    Posts: 716
    Joined: 1/16/2004
    From: England, UNITED KINGDOM
    Status: offline     		Roger... Er.... Have a quick glance on Tower's site...Tower stock # LXDKP6..or Futaba part no..AEC19...you can usualy buy the little Ferite ring ( bit with all the wires looped through) thingy for about a tenth of that price ......the big thermal seekers use these a lot. They argue that range checking on the ground is one thing....interference A.G.L is another..? Oh ! the channel 7 dial thing nearly cought me out too... cheers,Dave

    (in reply to rfw1953)
           Post #: 34

    RE: u-can-do 60 - 2/20/2004 5:32:44 AM   
    bobplay33


     

    Posts: 24
    Joined: 4/26/2002
    From: Sun City, CA, USA
    Status: offline     		Hi Joe,
    I apreciate your pics and posts. Your rudder servo installation is very interesting; but, I notice that your servo arm length is long while the rudder horn is short. That seems the reverse of what it should be to maximize torque advantage, no?
    Bob

    (in reply to AcroJo)
           Post #: 35

    RE: u-can-do 60 - 2/20/2004 5:54:15 AM   
    autoguns



    Posts: 758
    Joined: 3/9/2003
    From: ANCH, AK, USA
    Status: offline     		I used a 91 fs in mine for a long time ,It's a good combo and ran fine inverted After I got used to the plane and began hovering it, I wanted more power so I installed a YS110FZ ,and wow! what a difference, It will hover at 1/3 rd throttle and the 110 fit in he same mount as the 91 ...an easy swap....I love this plane....when you install the tank I would use a seamless tank if you plan on upgrading the motor to a pumped engine like the YS110 at a later date ...As far as the landing gear I just cut a small hatch in the top of the fuse under the canopy and it made the mod's very easy to get at the landing gear mount ...after I beefed it up, I just recovered the small hatch ,smoked the canopy ,and have had no problem's just fun.....JW

    (in reply to rfw1953)
           Post #: 36

    RE: u-can-do 60 - 2/20/2004 9:39:29 PM   
    AcroJo



    Posts: 2279
    Joined: 1/25/2003
    From: Clarks Summit, PA, USA
    Status: offline     		Bob, do not be fooled by the digital imagry, in reality they are of equal length. Since that pic, I've gone digital w/ DS811s all around and a DS8231 on the rudder. What a flapper. Can't wait to try it. Joe

    < Message edited by cumn thru -- 2/20/2004 4:40:48 PM >

    _____________________________

    Stranger in a strange place.

    (in reply to bobplay33)
           Post #: 37

    RE: u-can-do 60 - 2/20/2004 9:57:58 PM   
    lord lucan



    Posts: 716
    Joined: 1/16/2004
    From: England, UNITED KINGDOM
    Status: offline     		Gents...
    Have'nt Great planes put out massive warning about putting an engine of over.91 size (four or two stroke) ito the UCD .60... or " Catostrophick " failure could occur.. , christ, i dont think i can even spell it ,let alone comprehend what it could mean..?..! ...Dave.

    (in reply to autoguns)
           Post #: 38