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  1. GESchwarz

    My Design & Construction

    Here's the method I used in order to triangulate on the location of a leak in the fuel tank. I slowly raised the water level until the leak finally started to flow. I measured the water level at the fuel fill port. I did this with the wing banked to the left and again banked to the right. I...
  2. GESchwarz

    My Design & Construction

    With the wings 99.9% completed, I removed them to begin work on the engine compartment. This is a Mazda rotary engine. This photo was taken two or three months ago. I've been building the air induction system. That's quite an update that I've owed you guys. I cannot thank...
  3. GESchwarz

    My Design & Construction

    This isn't folded quite all they way, 90 degrees back, but you get the idea.
  4. GESchwarz

    My Design & Construction

    Dang! The video of the wing fold and the actuation of the wing trailing edge surfaces are both too large to fit here. I have posted both of them on my Facebook page. Log into Facebook
  5. GESchwarz

    My Design & Construction

    This is a laminar flow airfoil. I gave lots of span to the flaps, so I added spoilerons to assist the short-span, but generous-chord ailerons. There are lots of safety features on my design that favor slow flight and crashworthiness. The fuselage also is "area-ruled" to reduce flow separation...
  6. GESchwarz

    My Design & Construction

    Detail on how I applied sealant, with a syringe and a toothpaste tube. Application with a spatula or brush always seems to look like a murder scene. Taping the screws in-place at the outset prevents a lot of messy drama.
  7. GESchwarz

    My Design & Construction

    Fuel level sending unit and fuel pickup installation. Notice too the markings on the rib, showing number and location of gallons of water, measured by a monometer taped vertically on the side of the tank. This is a second installation of this plate, after having repaired a leak. As I filled...
  8. GESchwarz

    My Design & Construction

    It's always a good idea to have a final visual inspection before closing up the access panels. I had forgotten to remove the red tape I used to plug this fuel flow hole in this rib, under the one-way gate valve.
  9. GESchwarz

    My Design & Construction

    Detail on how I applied Proseal fuel tank sealant to the rivet heads, using a socket wrench as an application tool. Notice too that this had to be done with the aid of an inspection mirror. Fun and very rewarding.
  10. GESchwarz

    My Design & Construction

    Top view showing spars, flap actuation torque tube, some of the wing walk support structure (none of the span-wise members are in place, from the main spar aft), Wing fold hinges on the main spar and the lock bolt at the rear spar. The fuel tank is outboard, between the spars. The aileron...
  11. GESchwarz

    My Design & Construction

    The wing fold is far and away the greatest challenge of this entire project. I learned a lot about civilization and politics from this; every part has it's way to do it's job, and every part must also give way to others, however way it can, so they can do their job.
  12. GESchwarz

    My Design & Construction

    A little detail on how I form my parts. Not shown is the large rubber malet.
  13. GESchwarz

    My Design & Construction

    Here's my first-ever joggle forming. This piece is a plug to correct for a mistake where I cut away too much to make clearance for the wing fold. This is into the wing integral fuel tank.
  14. GESchwarz

    Determination of Aft CG Limit

    I have been making progress. I will post some updates with photos soon. Life has a way of getting in the way of the important stuff.
  15. GESchwarz

    Determination of Aft CG Limit

    Thank you guys! This gives me direction. Of course any additional insights or experience is welcomed.
  16. GESchwarz

    Determination of Aft CG Limit

    I would suppose that the forward limit should be explored first because it’s safer, given that exceeding the aft cg the plane becomes uncontrolable. Is there a typical cg range that is a percentage of the total wing chord, like 10 or 12%? If so, perhaps after finding a reasonable forward...
  17. GESchwarz

    Determination of Aft CG Limit

    Prior to first flight of a new aircraft design, how is the aft CG limit determined?
  18. GESchwarz

    Engine Thrust Line Angle

    What is the average engine thrust line, pitch angle offset used for a low-wing, single-engine airplanes?
  19. GESchwarz

    Safety wire/nylock/wave washer/rely on torque?

    Sounds good to me. Thank you!
  20. GESchwarz

    Safety wire/nylock/wave washer/rely on torque?

    How does Loctite work? When is Loctite an acceptable alternative to a mechanical locking feature?
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