Announcement

Collapse
No announcement yet.

Aviation Concepts 1/3-scale Schweizer 2-33 ~ Build Thread by JimD

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Aviation Concepts 1/3-scale Schweizer 2-33 ~ Build Thread by JimD

    I met Gunny Bumburs at the RC Propbusters New England Aerotow in 2010. It was the first time we both attended the event and ironically, we were the first two to arrive at the field on that first day of the event. Gunny brought out his 1/4-scale Schweizer 2-33 and I was immediately smitten. As the event unfolded, the Schweizer impressed a lot of the other attendees and Gunny was awarded the Best in Show award. This photo of Gunny with his award and 2-33 model has additional significance for me because of the Pilatus Porter in the background (but that is another story!).
    Click image for larger version  Name:	Gunny and 233.JPG Views:	1 Size:	200.7 KB ID:	14353



    The 2010 New England event was held in September (has since been moved to May) and my Fall Soar for Fun was coming up in two months. I persuaded Gunny to attend by buying a 1/4-scale kit and promising him a steak au poivre dinner at Fratelli's if he delivered the kit to Cumberland. Well, he did just that and can be seen (on right) with his 2-33 in this photo from that event.
    Click image for larger version  Name:	100_0206.JPG Views:	1 Size:	243.3 KB ID:	14352


    So we built the 1/4-scale 2-33 and were happy...until we got to see Gunny's 1/3-scale 2-33 at the 2014 Cumberland Summer Soaring event...oh well, had to give Gunny more money! Here are a gaggle of Gunny's Schweizer 2-33 models at the 2014 Summer Soaring event along with his brand new 1/3-scale model.
    Gunny's 1/4-scale is third from the left and his 1/3-scale is on the far right.

    Click image for larger version  Name:	Gaggle of 2-33s.JPG Views:	1 Size:	196.5 KB ID:	14354


    I promised Jason Haab that I would encourage his 1/4-scale build by posting my 1/3-scale build to help pull him along, so here goes!




    A Site for Soar Eyes

  • #2
    The 1/3-scale model kit arrives in a 12' x 12" x 36" box that is quite heavy. When you open it up, the amount of stuff that Gunny has packed in such a small space is truly amazing!
    Click image for larger version  Name:	101.JPG Views:	1 Size:	279.1 KB ID:	14356


    First thing is to locate the full color manual for intricate step-by-step instructions that no other kit comes close to matching.
    Click image for larger version  Name:	102.JPG Views:	1 Size:	290.5 KB ID:	14357


    Unrolling the multiple sheets of full size planes is another treat...every sheet has color print and is embossed with an Aviation Concepts seal.
    Click image for larger version  Name:	103.JPG Views:	1 Size:	299.1 KB ID:	14358


    The many sheets of parts are beautifully precision laser cut. Even has this neat detail on one of them.
    Click image for larger version  Name:	104.JPG Views:	1 Size:	237.3 KB ID:	14359


    And each kit has a serial number, I got kit #003
    Click image for larger version  Name:	104A.JPG Views:	1 Size:	247.3 KB ID:	14360


    I had purchased this scale tow release mechanism that Erich Schlitzkus makes...
    Click image for larger version  Name:	106.JPG Views:	1 Size:	198.6 KB ID:	14362


    ...and Gunny has an addendum kit that outlines the modifications and air-frame parts needed to mount this mechaism.
    Click image for larger version  Name:	105.JPG Views:	1 Size:	263.1 KB ID:	14361
    A Site for Soar Eyes

    Comment


    • #3
      If you want your very own Aviation Concepts 1/3-scale Schweizer SGS 2-33A, it is available direct from Gunny.

      You can also get Erich's scale tow release and the addendum parts kit direct from Gunny.

      Check out Gunny's complete website/store at www.AviationConcepts.com
      A Site for Soar Eyes

      Comment


      • #4
        Jim,

        I just bought one. I am not quit ready to build it yet, but want to have one on hand in case Gunny stop making it. Just ordered the spruce from Aircraft Spruce and Specialty. Still need to collect all the flat sheet stock.

        I will be check on this thread.

        Brian

        Comment


        • JimD
          JimD commented
          Editing a comment
          That's great...you can help push me along in the build!

          Gunny and Erich had their 1/3-scale 2-33's at the Windy Ridge Event in Hammondsport, NY in June, 2016. We did some side-by-side towing and then they did some formation flight and mild aerobatics...absolutely picture perfect visual art performance.

          Jeff D took amazing pictures which can be seen here: https://www.flickr.com/photos/jd-xti...54447656/page3

        • MarnochS
          MarnochS commented
          Editing a comment
          I broke open my box......Basswood and Balsa in hand.........but I'll have to wait till next year to start......

        • JimD
          JimD commented
          Editing a comment
          So you are starting the build in two days?

      • #5
        Okay, maybe MarnochS and eajbrian need a little push, so here goes...

        Made this handy sanding block

        Click image for larger version

Name:	107.JPG
Views:	1
Size:	243.3 KB
ID:	14737

        Then we started with the fin and rudder as per the manual.

        Click image for larger version

Name:	108.JPG
Views:	1
Size:	259.1 KB
ID:	14739

        Click image for larger version

Name:	109.JPG
Views:	1
Size:	264.5 KB
ID:	14744

        Click image for larger version

Name:	110.JPG
Views:	1
Size:	270.3 KB
ID:	14745

        Click image for larger version

Name:	111.JPG
Views:	1
Size:	215.9 KB
ID:	14740

        Click image for larger version

Name:	112.JPG
Views:	1
Size:	228.5 KB
ID:	14738

        Click image for larger version

Name:	112A.JPG
Views:	1
Size:	260.5 KB
ID:	14743

        Click image for larger version

Name:	113.JPG
Views:	1
Size:	278.2 KB
ID:	14741

        Click image for larger version

Name:	114.JPG
Views:	1
Size:	234.8 KB
ID:	14742

        A Site for Soar Eyes

        Comment


        • #6
          signed on JIm! so you switched from green to blue tape on the TE sand down and also a different lighter sandpaper on final I presume...Is the green tape different for a special purpose? .... thinner maybe for finer fit?

          Comment


          • JimD
            JimD commented
            Editing a comment
            Hi Matt,

            Actually, I switched to the green tape for my home painting projects. It has a better edge seal and stays together better when removing. IMHO it out performs the blue tap

            In this case, I also had wider green tape that suited the job requirement the best.

        • #7
          Good Motivation Jim

          My boxes of "scratch" and the end product I'm going for......but "Factory" new colors.....

          Click image for larger version  Name:	IMG_3901.JPG Views:	2 Size:	60.0 KB ID:	14754Click image for larger version  Name:	schweizer-sgs-2-33a-n7558-private-pleasant-valley-airstrip.jpg Views:	2 Size:	494.1 KB ID:	14755
          And, of course....Dan Troxell's version

          Click image for larger version  Name:	schweizer-sgs-2-33a-n7558-wing.jpg Views:	1 Size:	152.0 KB ID:	14771 Click image for larger version

Name:	schweizer-sgs-2-33a2-33%20flying%20RS.jpg
Views:	1
Size:	68.1 KB
ID:	14772
          Attached Files
          Last edited by MarnochS; 12-31-2016, 03:19 AM.

          Comment


          • JimD
            JimD commented
            Editing a comment
            That's different.. I like it!

            Have not settled on a scheme for mine yet.

        • #8
          More on the tail feathers...moving to the horizontal stab and elevator. The rounded ends are laminations of plywood and balsa.
          Click image for larger version  Name:	115.JPG Views:	1 Size:	264.6 KB ID:	14806
          Click image for larger version  Name:	116.JPG Views:	1 Size:	308.9 KB ID:	14807
          Click image for larger version  Name:	117.JPG Views:	1 Size:	334.3 KB ID:	14809
          Click image for larger version  Name:	118.JPG Views:	1 Size:	299.9 KB ID:	14808
          Click image for larger version  Name:	119.JPG Views:	1 Size:	220.9 KB ID:	14804
          Click image for larger version  Name:	120.JPG Views:	1 Size:	224.4 KB ID:	14805
          A Site for Soar Eyes

          Comment


          • #9
            Fuselage construction is easy because Gunny has designed the building process in a way that allows for most of the fuselage construction to be done on a flat surface.

            First step is to layout the plans and make a jig to bend the base stringers around. Remember, these can't stick up above the longerons or get glued to the floor that is added to them.

            Click image for larger version

Name:	121.JPG
Views:	1
Size:	313.3 KB
ID:	14826

            Click image for larger version

Name:	122.JPG
Views:	1
Size:	267.5 KB
ID:	14832

            Click image for larger version

Name:	123.JPG
Views:	1
Size:	235.0 KB
ID:	14830


            Click image for larger version

Name:	124.JPG
Views:	1
Size:	286.2 KB
ID:	14831

            Gunny provides triangles to set the correct angle of the formers.

            Click image for larger version

Name:	125.JPG
Views:	1
Size:	260.5 KB
ID:	14833

            Click image for larger version

Name:	126.JPG
Views:	1
Size:	269.7 KB
ID:	14827

            Click image for larger version

Name:	127.JPG
Views:	1
Size:	295.8 KB
ID:	14828

            Several of the main formers are laminated to add strength.

            Click image for larger version

Name:	128.JPG
Views:	1
Size:	314.4 KB
ID:	14829

            Click image for larger version

Name:	129.JPG
Views:	1
Size:	232.7 KB
ID:	14834


            Click image for larger version

Name:	130.JPG
Views:	1
Size:	287.1 KB
ID:	14835
            A Site for Soar Eyes

            Comment


            • #10
              Once these formers are in place, Diagonals and top spine can be added along with the wing saddle pieces.

              Click image for larger version

Name:	131.JPG
Views:	1
Size:	328.3 KB
ID:	14837

              Click image for larger version

Name:	132.JPG
Views:	1
Size:	291.8 KB
ID:	14838

              Click image for larger version

Name:	133.JPG
Views:	1
Size:	309.1 KB
ID:	14840

              Click image for larger version

Name:	134.JPG
Views:	1
Size:	318.4 KB
ID:	14842

              Click image for larger version

Name:	135.JPG
Views:	1
Size:	282.3 KB
ID:	14841

              Click image for larger version

Name:	136.JPG
Views:	1
Size:	336.5 KB
ID:	14839

              A Site for Soar Eyes

              Comment


              • #11
                Jim, you are making great progress on the 2-33! Keep up the great work on it.

                Comment


                • JimD
                  JimD commented
                  Editing a comment
                  Thanks Jason...Looking forward to your build as well...trying to stay on track to get the 2-33 ready for the Horizon Hobby Aerotow in June!

              • #12
                The stab and fin mount area has some special parts that need to be aligned carefully (not hard to do, just pay attention to Gunny's instructions).

                \ Click image for larger version

Name:	137.JPG
Views:	1
Size:	256.4 KB
ID:	14845

                Click image for larger version

Name:	138.JPG
Views:	1
Size:	293.5 KB
ID:	14851

                Click image for larger version

Name:	139.JPG
Views:	1
Size:	319.5 KB
ID:	14850

                Dremel tool is used to countersink the holes for the tapered wood screws.

                Click image for larger version

Name:	140.JPG
Views:	1
Size:	281.8 KB
ID:	14846

                We added a piece of dowel to "pin" the tail post to the stringer. This gets cut off flush with the tail post.


                Click image for larger version

Name:	141.JPG
Views:	1
Size:	250.8 KB
ID:	14849

                Short piece of dowel is drilled out and added as a scale detail for the stab mount.


                Click image for larger version

Name:	142.JPG
Views:	1
Size:	256.1 KB
ID:	14848

                Click image for larger version

Name:	143.JPG
Views:	1
Size:	267.9 KB
ID:	14847

                A Site for Soar Eyes

                Comment


                • #13
                  Jim,

                  Your setting a blistering pace.....

                  I'm going to make my Stab/Elev removable for transportation so installed 4-40 brass inserts into the tail brace blocks.
                  Click image for larger version  Name:	IMG_3913.JPG Views:	1 Size:	67.2 KB ID:	14899Click image for larger version  Name:	IMG_3914.JPG Views:	1 Size:	99.5 KB ID:	14901

                  Also found the little belt driven mini cut-off saw I have works really well for all the angle cuts...

                  Click image for larger version  Name:	IMG_3915.JPG Views:	1 Size:	86.7 KB ID:	14902
                  Got a bit of a slow start ....as I had some "Squatter" issues to deal with.......
                  Click image for larger version  Name:	IMG_3909.JPG Views:	1 Size:	98.2 KB ID:	14900

                  Scott
                  Last edited by MarnochS; 01-07-2017, 06:51 PM.

                  Comment


                  • JimD
                    JimD commented
                    Editing a comment
                    That is a very fine looking "squatter" you have there!

                • #14
                  Former production.......and Work bench extension......two seaters are longer.....Wife said I might need a bigger TV as it might be hard to see from the "other end".

                  Click image for larger version

Name:	IMG_3917.JPG
Views:	1
Size:	100.7 KB
ID:	14994Click image for larger version

Name:	IMG_3918.JPG
Views:	1
Size:	56.7 KB
ID:	14993



                  Comment


                  • #15
                    LOL

                    Oh yeah, then there's that.
                    Len Buffinton
                    Team Horizon Hobby

                    Comment

                    Working...
                    X