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LX 64mm SR-71 Blackbird on 4S 12-Blade Power Setup

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  • LX 64mm SR-71 Blackbird on 4S 12-Blade Power Setup

    So today I decided to install a 4S 64mm 12-Blade setup in my LX SR-71 Blackbird. I was hesitant because my existing setup was a Don's Wicked. And if any of you are familiar with Don, you know his power systems are top notch. However, the allure of how she would sound on a twin 12-blade setup was too much so I purchased two Freewing 64mm 12-Blade EDF 4S Power Systems w/ 2836-3300kv Motors and two ZTW 45A ESCs from Motion. Don's setup will find a new home, possibly in a new LX Blackbird airframe. Always good to have a spare.

    I installed the new setup today and took her out for a re-maiden. I mistakenly used the same 2x 3S 2200 setup I had with Don's setup, forgetting this was a 4S system. The results were predictable. She flew like a brick on Valium. I put an Admiral 4S 4000 in her and she woke up nicely. Still not as zippy as Don's setup, and I kind of expected that since twin 12-blades are not going to be as efficient as Don's perfectly balanced 5 blades, but it was still decent. The fans are not balanced so I will need to balance them.

    The sound is good...Not as "wooooooshy" (I believe that's the technical term) as the 80mm or 90mm 12-blade sound but definitely better than 5 blades. The video below captures both flights.

    I installed my Eagle A3 Super II gyro in her and WOW if there was ever a jet made for a gyro it's the Blackbird. You can visibly see the difference in the video when I switch her on in the first flight. The second flight (on 4S) it was on from the start.

    My YouTube RC videos:
    https://www.youtube.com/@toddbreda

  • #2
    Nice! I have one in the box I need to get going.

    Comment


    • #3
      If this is your first, I will be happy to offer up some helpful tips I've picked up over the years. Being that the Blackbird is my favorite all-time aircraft, I couldn't give up on her after the first few disasters. This is Lucky Number 13.

      No, that is not a typo. ;)
      My YouTube RC videos:
      https://www.youtube.com/@toddbreda

      Comment


      • #4
        Originally posted by Aros.MotionRC View Post
        If this is your first, I will be happy to offer up some helpful tips I've picked up over the years. Being that the Blackbird is my favorite all-time aircraft, I couldn't give up on her after the first few disasters. This is Lucky Number 13.

        No, that is not a typo. ;)
        Thanks ! I'll take any tips you want to give! Once I get my P-38 & T-45 Done I think I will get started!

        Comment


        • #5
          Great, come back to the thread when you're ready!
          My YouTube RC videos:
          https://www.youtube.com/@toddbreda

          Comment


          • #6
            Found this video on my Facebook memory page today...Too funny. Gives a glimpse of the issues I had taming this beast through the years. LOL

            My YouTube RC videos:
            https://www.youtube.com/@toddbreda

            Comment


            • #7
              This may have been one of the few LX models that I actually liked. I ordered it as a kit from General Hobby, and the idiots sent me a PNP. I emailed them several times to inform them of the screw up, but they never answered the emails, so I just kept it. It was a nightmare form the word go with the LX electronics, so I eventually wound up changing everything over to the set-up you are using, exactly. I flew her for two years before I finally lost it being silly. Lets just say there are some things Blackbirds were not meant to do!!!

              Now having said that, WHERE IS MY FREEWING SUPER SCALE TWIN 80mm SR-71 BLACKBIRD!!! I will be right here...waiting...

              Comment


              • #8
                You and me both!
                My YouTube RC videos:
                https://www.youtube.com/@toddbreda

                Comment


                • #9
                  The music was perfect for your video Aros ! Reminds me of my first edf......the bltzworks 50mm f86. I think I had 1 good hand launch out of every 6 attempts. Enter the bungee zone. The Blackbird is a bungee natural.

                  Comment


                  • #10
                    Originally posted by Kloverzero View Post
                    Now having said that, WHERE IS MY FREEWING SUPER SCALE TWIN 80mm SR-71 BLACKBIRD!!! I will be right here...waiting...
                    I'll take one as well!

                    I did my first "technical paper" in high school on the SR-71. Then got to see one up close and personal during ROTC field training in college. Nothing to this day has come close in design and performance. I think it's time for Freewing to memorialize this truly iconic aircraft.

                    Sean

                    Comment


                    • #11
                      Originally posted by scooter genie View Post
                      Enter the bungee zone. The Blackbird is a bungee natural.
                      For me? Not so much. LOL LOL



                      My YouTube RC videos:
                      https://www.youtube.com/@toddbreda

                      Comment


                      • #12
                        Vice vid aros LOL, Sorry on the high start, 2 things scare me the most,maiden hand launching edf and sling shotting one !
                        rc flyin addict

                        Comment


                        • #13
                          Yeah nothing scared me more in this hobby than trying to fly the Blackbird. LOL
                          My YouTube RC videos:
                          https://www.youtube.com/@toddbreda

                          Comment


                          • #14
                            Originally posted by Aros.MotionRC View Post
                            Yeah nothing scared me more in this hobby than trying to fly the Blackbird. LOL
                            I would think that a 200 dollar SR-71 would not scare me as badly as an 800 dollar 105mm F-16 would!!!!! Maybe thats just me, but my knees are shaking just thinking about it. I had one on order for about an hour, before the wife vetoed it. Maybe one day....

                            Comment


                            • #15
                              Yeah my HSD 105mm F-16 has me knocking knees every time I take her out. The thing is though, she's super stable (comparatively to the Blackbird). So while she's large and heavy, she flies great. Definitely more forgiving and a wider flight envelope then the SR-71.

                              Now an SR-71 the same size and weight of my HSD F-16? Forget that! I wouldn't have the nerve. LOL
                              My YouTube RC videos:
                              https://www.youtube.com/@toddbreda

                              Comment


                              • #16
                                Hey Aros. I found that old Model airplane news article on bungee set ups. It says the proper hook placement is 1-2 inches ahead of the cg. I have always followed that rule, and never had a problem with my launches. I always lean towards the long measurement.

                                Comment


                                • #17
                                  Yeah I must have missed that article back then. LOL
                                  My YouTube RC videos:
                                  https://www.youtube.com/@toddbreda

                                  Comment


                                  • #18
                                    It's the Oct 2011 issue of Model airplane news.

                                    Comment


                                    • #19
                                      Thanks, I was being facetious. ;)
                                      My YouTube RC videos:
                                      https://www.youtube.com/@toddbreda

                                      Comment


                                      • #20
                                        I love my SR-71 with the Don's wicked setup, those 4000 kv motors and fans sing and i mean they sing a beautiful song that blessed with sound and speed and happiness when it gets to fly.
                                        The gyro helps (Aros you are welcome, if you remember I was the one who suggested it to you!) so the Eagle does work well with the SR-71 and keeps her true but I have thought of building another air frame, one like Aros using 12 blades and a slightly larger battery (currently a 2500 60c- a direct drop in if I remember correctly.) Battery quality is also key here, I have phased out my Turnigy batteries except the Graphene batteries with the Admiral batteries from Motion RC, last year my first SR-71 was damaged from a battery dropping out too soon, so now new AF, new batteries and hoping for a slight upgrade.
                                        Just let me fly so I may be free

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