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  1. GESchwarz

    Determination of Aft CG Limit

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

    Engine Thrust Line Angle

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

    Sealing of Removable Inspection Cover, Gas Tank

    What is the proper sealant material for a removable inspection panel for an aluminum fuel tank? The panel is .032" aluminum, as is the tank itself. The panel is held in place with screws and nutplates. The products from Permatex are marked "Fuel Resistant", which is meaning less; I tested...
  4. GESchwarz

    How To Increase Pro-Seal Cure Time?

    How do I increase Pro Seal cure time? I need to apply this stuff through a syringe, so it needs to be able to flow freely though a .075" diameter tube for nearly an hour to allow me to get to all the areas I need to seal. At 57 F room temperature, the P/S Class B sealant set up in just 20...
  5. GESchwarz

    5606 Compatible Pipe Thrd Sealant

    What pipe thread sealants are compatible with 5606 hydraulic fluid? Will Permatex Form A Gasket do the job?
  6. GESchwarz

    Older Master Cylinder, Rebuild Kits for

    Any suggestions on how to go about sourcing replacement seals for these older Master Cylinders, namely the Scott 4408E and the Adel 53378-2?
  7. GESchwarz

    Are Poly-Flo Fittings Single Use?

    I'm just getting familiar with the Poly-Flo fitting and the Nylon tubing that mates to it. Apparently upon tightening the nut, the sleeve inside the nut permenantly compresses around the Nylon tubing. Is there a way to remove tube from the sleeve without causing any damage tro the sleeve or...
  8. GESchwarz

    Method of Brake Application With Nose Wheel Steering

    What is the best configuration for brake control on a plane with nose wheel steering? Is steering with brakes better than nose wheel steering, if so, why? I would guess that steering with the brakes is going to generate a lot more heat than if steering is done by the nose wheel.
  9. GESchwarz

    Fitting, Brake Master Cylinder

    I have a pair of master cylinders just like the one in this picture. The female thread in the the housing that receives the AN hydraulic fitting is not a pipe thread. It looks like that blue fitting is an adapter with an o-ring boss on the far side and a female pipe thread on the near side...
  10. GESchwarz

    Inside Liner, Stock Exhaust Manifold

    What is the alloy that the Inside Liner of the Stock Exhaust Manifold is made of? I'm guessing it is either Inconel or 321 Steel.
  11. GESchwarz

    Add Peripheral Exhaust Port To Renesis

    Does any one have experience with adding a peripheral exhaust port to the Renesis engine? It’s been done in auto racing because the stock Renesis side exhaust port is so restrictive.
  12. GESchwarz

    Wanted: RWS EC-2 & EM-2

    I'm putting together my Mazda Renesis Rotary powerplant, and looking for a controller and monitor.
  13. GESchwarz

    NSR Nylon Brake Line

    Is NSR Nylon hose acceptable and commonly used for aircraft brake systems? If so, what are the limitations, if any, and what do I need to know to create a reliable installation with this material?
  14. GESchwarz

    Mazda Rotary Engine

    Why am I not seeing any posts from people using the Mazda Rotary Engine?
  15. GESchwarz

    Airframe as Return Leg of Electrical Circuits

    My airplane is primarily rivited aluminum construction. It is my understanding that the metal airframe can be used as the return leg of DC electrical circuits. My question is, is it worth is to use the airframe instead of dedicated return wires, given all the bonding consideratons of an...
  16. GESchwarz

    Wire Gauge Sizing

    I am 10.5 years into my build and I am about to start doing some wiring for the first time. What wire gauge do I need to power my navigation lights out at the wingtips? Does anyone have a table of wire gauges for typical systems of a general aviation aircraft?
  17. GESchwarz

    Instrumentation Tubing

    Is there a minimum tubing ID for pitot and AoA systems? The length of the run for these tubes is about 16 feet.
  18. GESchwarz

    Fuel Tank Sealant Adhesion & Performance

    Is it expected that polysulfide will adhear to aluminum fuel tank part mating surfaces, or does the fuel cause it to debond. If it does debond, does the polysulfide continue to keep the tank sealed as long as the material stays in place, sandwiched between the mating parts, including rivets?
  19. GESchwarz

    How to seal and secure an AN bulkhead fitting.

    I am installing the vent line into my integral aluminum wing fuel tank, using a standard AN bulkhead fitting. What kind of fuel sealant should I use? The nut that secures the fitting is inside the tank. How do I ensure that the nut will not loosen? Do I use a thread locking compound or...
  20. GESchwarz

    Pull Rivet Material Type

    What type of pull rivet material should I use on my aluminum skins, aluminum or stainless?
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