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Crescendo Build

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  • Crescendo Build

    Greetings All.

    Quick post to start documenting my build. Has been a crazy few months with family health issues but have managed to make some great progress. The airframe is fitting together like a Swiss watch.
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    Pictured are the seat and engine mount diagonals' lower termination into the keel (with temporary hardware). The rendering puts the photos into context. The stock GyroBee on which this ship is based terminates the engine mount diagonals into the mast with a bolt. Though I cannot argue with the Bee's excellent safety record, Crescendo's diagonals run continuous to the keel, bypassing the mast. They do bolt-clamp fore and aft of the mast, though no hole through the mast is required at the attachment point.

    Two 3-gallon fuel tanks are located behind the seat, shaped to help clean up the airflow behind the pilot. This removes the tank and tray-mount normally between the cluster plates and prop on a stock Bee. Fuel is now closer to CG so changing fuel levels minimizes changes in balance.

    I'll be maintaining a builders log on KitLog Pro in greater detail once the software is set up properly.

    Respectfully,
    Brian Jackson

  • #2
    Looks Good Brian!

    Thank you for sharing the fun.
    Regards, Vance Breese Gyroplane CFI http://www.breeseaircraft.com/

    Comment


    • #3
      As Vance said, "Looks Good Brian"!
      If I may add some building techniques that are used and accepted.
      Your fit looks awesome, but there will always be some movement from vibration and stress.
      I never let two pieces touch as your angle does. This can cause some wear and crushing between the touching parts.
      Always make sure your washers are not on top of the radius of the corners of your angle aluminum.
      This causes cuts in the radius and a bending moment in the bolt.
      I only make this statement from what the picture depicts.
      Seems as you have planned your project before expediting your build which is a good thing.
      From what I've seen so far your workmanship is great and the detail will make your machine stand out.
      Life,The leading cause of Death

      Live and Learn--OR--Die and be an example

      321.252.7705

      Comment


      • #4
        Thank you Jake. Coming from you that is a great compliment and words of wisdom. There will be a finish milling step that creates a hairline gap between the angles to prevent contact. And yes, the washer diameter have been accounted for such that it will not encroach onto the inside radius of the angle. It stops just shy of the tangent, but as close as possible to the 90 degree leg. I've seen photos of some installations where washers interfering with the angle radius has been a serious problem. Thank you for your keen eye and guidance.

        Comment


        • #5
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          Steady progress on some detail elements of the airframe. Per Jake's direction in another thread I added .0625" of offset clearance between diagonals at the tie point. A stainless steel caliper mic is handy for scribing layout lines on aluminum. In the 2'nd closeup photo you can see a very slight gap between the keel and tailboom tubes. This is to account for the thicknesses of the powder coat finish (2 X ~.004") so the thru-bolts don't bind. I adhered tape of that thickness between the mating surfaces of the tubes before doing any transfer punches. The tailboom tube in the last photo was angle-cut to match the forward plane of the seat support angles via transfer scribe once all of the structural terminations were finished. Nice to see things turning out like the 3D model. But it is more time consuming than I expected tooling up for so many different compound angles.

          Comment


          • #6
            Welcome to the world of building with intent detail.
            Another trick is to use a piece of plastic under my clamps to stop that UnGodly mark the clamps leave.
            Life,The leading cause of Death

            Live and Learn--OR--Die and be an example

            321.252.7705

            Comment


            • #7
              Indeed. And these were plastic-footed clamps designed not to spin. Have been using spacers now. Fortunately the swirl marks buff right out.

              Comment


              • #8
                Spent Super Bowl weekend working on the seat mounting. Extremely clean, solid installation so far. I re-purposed a quite expensive high quality office seat I used to refer to as the Captain's Chair, though I stripped it of all hardware leaving only the upholstered substrates of the bottom and backrest. Though they have threaded inserts, I do not trust them and installing carriage bolts from the inside under the upholstery.

                At first I dismissed the idea of using it as a gyro seat but after disassembling it, examining, surveying the parts and weighing them, the idea was plausible. Being a separate backrest and seat rather than a 1-piece shell, the bracketing design also unitizes the two pieces where they meet to aid with offset bending loads. Will share photos this week. Curious if other builders have done the same or similar.

                Comment


                • #9
                  Tubes for landing gear arriving today from Aircraft Spruce. Have been getting material and mill certifications from a local Metal Supermarket up until now, but a couple of the sizes were not stock items. I was happy to have received a call from Aircraft Spruce about my online order where I added a note to make sure the pieces aren't scratched. I'm told they all have handling abrasions, which is to be expected, but not to let them be deeper than a light sanding could take down. I appreciated that my note was even acknowledged.

                  I'm still learning all about Shock Absorbers / Dampers before selecting what I hope will be the optimal units for this configuration. The goal is to attach the vertical strut higher up on the mast with an in-line shock at the mast attachment. I'm hoping to unitize the shock with the vertical strut (rigidly fix them in a straight line) in a way that eliminates the need for an additional diagonal support. This would preclude a free-pivoting connection at the shock's lower eyelet. Any photos, recommendations or guidance would be greatly appreciated. I started a thread in the "Other Components" section about shocks that has provided some insights, and eager to learn more before any saw blades and drills start spinning.

                  Thanks again everyone.

                  Brian Jackson

                  Comment


                  • #10
                    I love progress Brian.

                    Thank you for sharing the fun!
                    Regards, Vance Breese Gyroplane CFI http://www.breeseaircraft.com/

                    Comment


                    • #11
                      Originally posted by Vance View Post
                      I love progress Brian.

                      Thank you for sharing the fun!
                      And thank you for being so helpful with my questions.

                      Comment


                      • #12
                        Quick update, sorry no photos this round. Spent the weekend on the landing gear attachment system and currently awaiting arrival of Aurora rod ends from Aircraft Spruce. Though projects like this are an exercise in patience and planning, it's wonderful to see progress, slow as it may be sometimes. I hope the quality is evident to all who inspect it. It's amazing that we live in a time that allows us to even do such a thing.

                        Comment


                        • #13
                          Dang you do such good work!!! Thanks for sharing!
                          Last edited by All_In; 02-26-2018, 01:07 PM.
                          Resistance is futile…… You will be compiled!
                          Cheers,
                          John Rountree

                          PRA- Director, Secretary
                          PRA- Business Manager

                          PRA31 - Vice President of S.D. Rotorcraft Club
                          http://www.Pra31.org

                          U.S. Agent for Aviomania Aircraft... the most stable gyroplane on the market today.
                          See: Aviomania USA http://www.AviomaniaUSA.com

                          OEM Dealer for MGL Avionics - glass cockpit EFIS for Experimental aircraft Ask about DISCOUNTS for PRA MEMBERS

                          Comment


                          • #14
                            Originally posted by All_In View Post
                            Dang you do suck good work!!! Thanks for sharing!
                            Freudian slip? Sorry, couldn't resist :-) And thank you. Looking forward to posting some photos of the other detail areas.

                            Comment


                            • #15
                              Originally posted by Brian Jackson View Post

                              Freudian slip? Sorry, couldn't resist :-) And thank you. Looking forward to posting some photos of the other detail areas.
                              There I go again!!! But at least I crack myself up too once someone who can read points it out. I corrected it.
                              Resistance is futile…… You will be compiled!
                              Cheers,
                              John Rountree

                              PRA- Director, Secretary
                              PRA- Business Manager

                              PRA31 - Vice President of S.D. Rotorcraft Club
                              http://www.Pra31.org

                              U.S. Agent for Aviomania Aircraft... the most stable gyroplane on the market today.
                              See: Aviomania USA http://www.AviomaniaUSA.com

                              OEM Dealer for MGL Avionics - glass cockpit EFIS for Experimental aircraft Ask about DISCOUNTS for PRA MEMBERS

                              Comment

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