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Slingsby T-37 Skylark ~ 1/3-scale model by Peter Goldsmith (Build Thread by JimD)

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  • #46
    Congrats on the flight and beautiful ship! Maybe I missed it somewhere in the thread, but can you provide some basic specs on the power system?

    Comment


    • JimD
      JimD commented
      Editing a comment
      I am posting a complete list of all the things I used to complete the model. Jeremy Hartmann (aka Swiss1) owner of the Model Box 2.0 Hobby Shop is providing a package deal on all of these items. He can be contacted at (205) 978-8787

  • #47
    Spektrum Servos:
    • A5060 (SPMSA5060) (note: need one of these for the rudder)*
    • A6320 (SPMSA6320) (note: need one of these for the tow release)
    • A7020 (SPMSA7020) (note: need four of these, two for elevators and two for spoilers)
    • A7050 (SPMSA7050) (note: need two of these for the ailerons)
    *Hangar 9 3D XL Full Servo Arm 4-40: JR (HAN3576) (note: need one of these for the rudder pull-pull system.

    Motor system:
    Motor: Power 32 Brushless Outrunner Motor, 770Kv(EFLM4032A)
    Speed Control: 60-Amp Pro Switch-Mode BEC Brushless ESC (V2)(EFLA1060B)
    Prop: 14 x 8 Folding Prop with Aluminum 38mm Spinner(EFLP14080FA)
    Motor Battery: 14.8V 4000mAh 30C 4S LiPo, 12AWG: EC3(EFLB40004S30)

    Launch Dolly:


    DuBro Treaded Lite Wheels 4-1/2"
    (DUB450TL) (note: will need two wheels)
    DuBro 3/16" Dura-Collars (4) (DUB141) (note: will need four and there are four in one pack)
    3/16" Music Wire axle (note: will need piece 4-1/2" long)

    Hardware:

    Dubro Products
    • 4-40 Pull-Pull System (DUB518) (note: comes with 4-40 Kwik Links, but substitute 4-40 Ball Links on servo end)
    • 4-40 Threaded Rod 12" (6) (DUB802) (note: 6 in pack, but only need one rod for tow release mechanism)
    • 4-40 Heavy Duty Ball Links (2) (DUB899) (note: 2 in pack, but will need three ball links, so get two packs)
    • 2-56 Pushrod w/ Kwik Link 12" (5) (DUB185) (note: 5 in pack and will need four, two each for ailerons and elevators)
    Adhesives:
    • Deluxe Materials Aliphatic Resin 112g (DLMAD8) (note: will need two bottles for general construction)
    • Deluxe Materials Speed Bond 4oz (DLMAD10) (note: will need one bottle for sheeting using heat method)
    • Deluxe Materials Cover Grip 150ml (DLMAD22) (note: will need one bottle to cover model)
    Last edited by JimD; 10-17-2018, 01:33 PM.
    A Site for Soar Eyes

    Comment


    • #48
      Thanks Jim. Pretty amazed that the Power32 can pull that thing up, but I also proves that the 100 watts per pound guidelines doesn't always apply to sailplanes. What kind of climb angle do you get from the dolly launch?

      Comment


      • JimD
        JimD commented
        Editing a comment
        If you are familiar with the Radian XL, it is similar to slightly better. Only required a ground run of about 20-30' to get airborne.

        Keep in mind that the Skylark has very light wing loading with lots of wing area. All the motor needs to do is pull it forward, the wing does the lifting...not like a plane that needs a strong motor to pull it into the air.

    • #49
      The Model Box Shameless Commercial #1

      Gentlemen, if any of you are interested in purchasing any of the completion components for this model I can make up a bespoke package for you and deliver it to the Cumberland Fall Event!
      I need to know your needs by latest Thursday the 25th next week in order to make sure I have all items in stock! If there are any other wants please call me at 205.978.8787.

      And thank you Jim for your commercial

      Jeremy
      SCCAAA TT TN

      Comment


      • #50
        Dion, I was concerned that the 32 would be lacking also. However I saw the prototype fly at Muncy PA and was impressed with it's climb rate and it's flight characteristics.

        Mark

        Comment


        • #51
          I did several launches with the Skylark at Muncy. It leaps off the ground before you have a chance to get yourself in trouble.

          It climbs better than the XL, in my opinion, but you do have to fly it. Climbs better with a shallower pitch angle. Once you get it locked into that sweet spot it's a smooth climb as high as you'd like.

          Kevin
          ​​​​
          ​​​​​​

          Comment


          • #52
            Hi Jim,

            Thankyou for your build logs, they are well presented and make it easy for us to follow.

            I am asking about the adhesives you have used.
            • Deluxe Materials Aliphatic Resin 112g (DLMAD8) (note: will need two bottles for general construction)
            • Deluxe Materials Speed Bond 4oz (DLMAD10) (note: will need one bottle for sheeting using heat method)
            • Deluxe Materials Cover Grip 150ml (DLMAD22) (note: will need one bottle to cover model)
            Are there alternatives? particularly for the speed bond, I am keen to try the iron on wing sheeting method but unfortunately here in australia, deluxe materials distribution seems to be in a state of flux and as such it is proving challenging to source the glue.

            Cheers
            Steve

            Comment


            • JimD
              JimD commented
              Editing a comment
              Hi Steve, I am told that most any brand of Aliphatic adhesive will work this way...but I have only tried it with the Speed Bond. Maybe others could offer advice about this.

            • lunns
              lunns commented
              Editing a comment
              Thanks for the response Jim, I appreciate it.
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