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  1. epijack

    A Detailed Look at PSRU Design Methodology

    Over the course of recent years, and over the course of having designed several engines and gearboxes for various applications (PSRU, helicopter, NASCAR, INDYCAR, industrial, etc) , several clients and a number of friends have asked me to make available my thoughts on "How to Design a PSRU"...
  2. S

    Rotax 503 gear replacement

    Hi, For my motorglider I acquired a 58x36 2 bladed propeller. According to calculations I was given with it it should produce about 756N (roughly 165lbs of thrust). The engine will easily overrew if not monitored even on the ground. I was looking into official recommended prop sizes for my...
  3. Armilite

    Have you ever had an Ultralight/Kitplane Gear Drive Fail?

    Have you ever had an Ultralight/Kitplane Gear Drive Fail? What happened?
  4. C

    Rotax Gearbox 2.58:1 Pinion (small) gear...

    I need a small gear for a rotax 2.58:1 gearbox, this is the one with 19 teeth..... Late A Box, or B Box preferably... My gearbox didn't come with the small gear...:dis: E-mail if you can or PM, I check once in a while.
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