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  1. pkopic

    Helicopter Aerodynamics

    Question: Why is the Horizontal Stabilizer Aerofoil, located on the tail section, on a Bell 407/412 (possibly others) oriented upside down (ie. produces lift downwards)? Is this to balance the rotorcraft about the c.g. at higher airspeeds? Cheers,
  2. pkopic

    Airbag Deployment/Safety

    I had a question/concern regarding the deployment of airbags, and the general safety of airbags. We all know that children should not sit in the front passenger seat if the vehicle is equipped with airbags because the airbag could be deadly to the occupant. If airbags are not safe for kids are...
  3. pkopic

    High Pressure H2 - Material Compatibilities

    With regards to your question. Are you looking for plumbing lines, fittings, filters, etc.? In any case I think that Parker would be a good bet for material information, perhaps try to look to see if they have an on-line cataloque. This might be a good start to check out compatibility of...
  4. pkopic

    Hydrogen (H2) Generating System

    Over the past couple of years I have been involved in the design and development of a number of alternate fuel systems for the transportation industry, all of the fuel systems were mainly CNG systems. During this time I had an opportunity to take a closer look at some Hydrogen fuel cell systems...
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