Roban - World Class Scale Helicopters

1/20 Scale U-2R (3D Printed)

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  • Dirty Dee
    Member

    • Dec 2016
    • 768
    • Northern Illinois
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    #61
    Thanks Steve! Happy Thanksgiving to you as well.

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    • Dirty Dee
      Member

      • Dec 2016
      • 768
      • Northern Illinois
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      #62
      Merry Christmas all!

      Finally got around to another round of tests with 100% FSA exhaust and enlarged intake cheater. Overall, improvements were relatively minor, with 600g of thrust at 618W compared to 590g at 596W. 10 grams of increased thrust with the changes.

      Earlier this week I quickly went out to confirm ease to hand-toss. below is a short video from the first of the 2 flights. I forgot to write down notes from the maiden, so I was re-learning a bit with what rates I had set for ailerons, rudder, and elevator. The plane felt a bit snappier than before when banking using ailerons with a bit of rudder, so I brought it down pretty quickly in the video. Besides, this, the plane takes off from an underhand toss pretty easily.

      I have graphics coming in from Callie in the next week or 2, so I will have some photos to share of a completed U-2R and ER-2. I'm also going to try and vacuum from canopies for both airframes. Ordering some 1300mAH 4S packs as well.

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      • rifleman_btx
        me

        • Dec 2016
        • 5246
        • West Point TX
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        #63
        Merry Christmas to you as well! Looks great

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        • Dirty Dee
          Member

          • Dec 2016
          • 768
          • Northern Illinois
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          #64
          Callie graphics came in

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          • Elbee
            Elbee commented
            Editing a comment
            Chris, WooHoo! Lookin' good, Sir. What painting techniques are you going to use? Steve
        • Dirty Dee
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          • Dec 2016
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          #65
          Hey Steve,

          I will be just doing a sanding of the printed parts with no additional paint. I have one in black and one in white. Just basic gap filling with ABS slurry where its needed, and then matte or satin clear coats to seal in the vinyl and make it easier to wipe down from grass or dirt stains.

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          • Dirty Dee
            Member

            • Dec 2016
            • 768
            • Northern Illinois
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            #66
            Trying out airfoil analysis using XFLR5. Still a ways to go to understand what I am looking at, but hoping to be able to use this to optimize my scratchbuild and 3d print designs. After I figure it out and learn on the U-2R, I'm going to revisit my A333 and see how well or inefficient I designed that wing.

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            • Dirty Dee
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              • Dec 2016
              • 768
              • Northern Illinois
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              #67
              3D printed lading gear set added, included printed rubber tires. Can be installed/removed with a set of screws for the mains and tail

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              • MikeT
                Here......Hold my beer.

                • Jan 2016
                • 1060
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                #68
                WOW !

                Mike
                \"When Inverted Down Is Up And Up Is Expensive\"

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                • F106DeltaDart
                  Scale Warbird and Chopper Pilot

                  • Feb 2015
                  • 2817
                  • Arlington, TX
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                  #69
                  Beautiful work! That looks awesome! You never cease to amaze me at what you’ve been able to do with 3D printing!

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                  • Dirty Dee
                    Member

                    • Dec 2016
                    • 768
                    • Northern Illinois
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                    #70
                    Thanks guys

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                    • Elbee
                      Be humble...be approachable...and be credible.

                      • Feb 2018
                      • 4826
                      • Wichita, Kansas
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                      #71
                      Originally posted by Dirty Dee
                      3D printed lading gear set added, included printed rubber tires. Can be installed/removed with a set of screws for the mains and tail
                      DD, Outstanding work. Just amazing. Love the 'front-on' picture. Bravo Zulu. Best, LB
                      "I am having an extraordinary ordinary life."
                      ~Lucky B*st*rd~

                      "Find satisfaction in the process rather than an outcome."
                      ~Anonymous~

                      AMA#116446

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                      • Dirty Dee
                        Member

                        • Dec 2016
                        • 768
                        • Northern Illinois
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                        #72
                        A fresh fuselage for the original prototype's electronics. Graphics by Callie.

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                        • MikeT
                          Here......Hold my beer.

                          • Jan 2016
                          • 1060
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                          #73
                          Nice.

                          Mike
                          \"When Inverted Down Is Up And Up Is Expensive\"

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                          • MANFRED
                            Any Warbird, any time

                            • May 2017
                            • 299
                            • San Diego, Ca
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                            #74
                            I grew up close to Davis-Monthan AFB in Tuscon, these black ships were a constant sight in the skies above me. Very impressive in the air with a distinctive whistle

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                            • Phantom
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                              • Mar 2019
                              • 504
                              • M.D.
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                              #75
                              I still see them about once a week flying out of Osan, almost got ran over by one twice back in 2013. I was flying a Cessna 172 with the flying club, and apparently competing for traffic pattern time with a U-2. After almost being ran over the second time I realized that the tower controller that day was an idiot, and so I called it, and came in too land.

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                              • AceMigKiller
                                Insta: Check5_Av8r

                                • Feb 2016
                                • 175
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                                #76
                                Duuuude, how cool is this?!?

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                                • Elbee
                                  Be humble...be approachable...and be credible.

                                  • Feb 2018
                                  • 4826
                                  • Wichita, Kansas
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                                  #77


                                  Hey Y'all, This is a great video on the history of the "Black Planes" and the Lockheed Skunk Works. Well worth the watch. Best, LB
                                  "I am having an extraordinary ordinary life."
                                  ~Lucky B*st*rd~

                                  "Find satisfaction in the process rather than an outcome."
                                  ~Anonymous~

                                  AMA#116446

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                                  • Dirty Dee
                                    Member

                                    • Dec 2016
                                    • 768
                                    • Northern Illinois
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                                    #78
                                    Thanks for sharing the vid. For those who enjoy reading, here was a book I read and can recommend:

                                    "Skunk Works: A Personal Memoir of My Years of Lockheed" by Ben R. Rich and Leo Janos


                                    I also thought I can show a little teaser of another project. Black planes have their own challenges with both EPO and PLA, and ABS has manufacturing challenges as well with 3D printing in hobbyist levels with sections over 100mm. We'll see after I finish my buckeye if I can get another iconic plane to work out.

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                                    • Prowler901
                                      HobbySquawk Pilot

                                      • Jan 2016
                                      • 940
                                      • Gunnison, CO
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                                      #79
                                      You're doing a T-2 Buckeye? SWEET! I loved flying that plane.

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                                      • Dirty Dee
                                        Member

                                        • Dec 2016
                                        • 768
                                        • Northern Illinois
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                                        #80
                                        Sized for a 90-100mm, Getting to printing it shortly after I make some final scale tweaks to the model that I overlooked originally.

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