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Richard Schubert

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About Richard Schubert

  • Rank
    Me and the Pobe!
  • Birthday 07/07/1958

Flying Information

  • Flying Status
    E-Racer 267JW

Personal Information

  • Location (Public)
    Pittsburgh, PA
  • Occupation

Project/Build Information

  • Plane
  • Plane (Other/Details)
    Mazda E-racer
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  1. I used prefabricated circuit board standoffs from MSC. Plated, 1020 steel, and available in various lengths.
  2. I used phenolic as well. You want the washer in full contact with the hardpoint. If you want to come down and see how I have mine installed, drop me a line mephit@att.net
  3. Here is a little calculator you can play with to get an idea of how it works http://www.paragonair.com/public/aircraft/calc_TAS.html
  4. Here's a thrust line that works with a V-8 http://www.airliners.net/photo/Rutan-61-Long-EZ/0891972/L/&sid=e9999c22abdd4395330ecbdb7b20a35b
  5. My understanding was that the epoxy method would fill the pinholes, whereas primer has a tendency to bridge over pinholes, leaving an air pocket that could be broken into during sanding. Maybe newer primers don't have this potential problem?
  6. It could be for a Rotorway RW-100 engine. Rotorway modified a few of their helicopter engines for airplane use and at least one of them found its way into a varieze. All my things are packed up at the moment but I am sure there is an article with pictures in Alternative engines Vol 1 or 2. (Contact magazine anthology)
  7. Some more information on this topic http://www.homebuilt.org/misc/mangndelevators.pdf Definitely something that needs to be gotten correct. (thanx Marc)
  8. On the Longeze this is a method for increasing the balance without extra weight. Fabricate a bracket and rotate the weight 90 degrees. This idea came from the CSA newsletter and has been used on a longeze for 2000 + hours. YMMV Not to scale
  9. I have heard of people using stainless steel tea strainers http://www.englishteastore.com/teastrainers.html Take a quick trip to Bed/Bath/Beyond, they have several sizes.
  10. I will be driving down from Pittsburgh on Friday. If you let me know the beverage of preference, I will bring a cooler full. I'll just put it on Bruce's tab
  11. Oops, the numbers above are wrong. The ratio lengths should be measured from the fulcrum point. The Matco recommended ratio is actually 3.5:1 and the ratio for Steve's pedals should be approximately 4:1. The 1.3:1 is correct.
  12. We agree, I just can’t construct an intelligible sentence. The brake pedal is a lever, if the cylinder is mounted at the pedal there is no leverage and the force applied to the brake cylinder is the same as the force applied to the pedal. If the cylinder is mounted halfway between the pivot and the pedal the leverage is 2:1, giving twice the force on the cylinder(and twice the movement at the pedal). Steve's cylinders appear to be mounted a quarter of the way from the pivot to the pedal for a 3:1 leverage. Wayne's cylinders appear to be about three quarters of the way from the pivot to the pedal for a 1.3:1 leverage. Matco suggests 2.5:1 or more. The fact that there is a pivoting arm attached to the cylinder to allow for rudder deployment doesn’t affect this, it is where the cylinder shaft intersects the the brake pedal arm that determines the lever ratio. If the pivot arm is flipped as Tmann suggests it will improve the ratio, but the brake cylinder will be mounted at an angle to the force being applied introducing trigonometric effects. Depending on the angle, this might result in non-linear pedal force feedback, I.E. the further the pedal is pushed, the softer it will become. Now that I look at Wayne's again, it appears that there is a significant angle between the line of action of the brake pedal force at full depression and the line of resistance from the cylinder. This will increase the pressure on the cylinder for the same force on the pedal, acting like a longer lever arm but in a non-linear fashion. If the stroke of the cylinder is short enough, and the radius of the circle it moves along is large enough, the force would not change enough over the pedal range to be noticeable. If all the angles are known the total lever ratio could be figured out exactly. Translation: It might work Wayne is clever
  13. If you compare Steve’s and Wayne’s setups you will see that they are almost exactly the same except that Wayne’s pivots from the top and Steve’s pivots from the bottom, giving the opposite mechanical advantage on Wayne's from what is needed on the cylinder, IMHO.

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