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  1. carockwell

    What Aluminum is used to make cylinder heads?

    The Mazda rotaries used in the normally aspirated RX-7 typically hit 1650 F exhaust gas temps at full throttle measured about 12 inches from the exhaust manifold gasket. Probably a lot more if turbocharged. You need a really tough exhaust system on a rotary.
  2. carockwell

    Wind Tunnel Smoke Generator

    What do the wind tunnels use as a smoke generator to get the "stream of smoke" flowing over the test object?
  3. carockwell

    Questions about NACA ducts

    The velocity through the duct will be dependent on the pressure differential between the entrance pressure and the exit pressure. This means that the velocity will be dependent on both the vehicle speed and the engine's air consumption.I cannot follow the link where you get your data. NACA ducts...
  4. carockwell

    Flow Conditioning In Tube

    I was recently told that using the foam from off road racing aircleaners was the best way to get the desired result. I will try this in the next few weeks and compare it to the straw method.
  5. carockwell

    Mini Cooper Cooling Testing

    Ummm..Heritage? They are the ones telling their customers not to drive when it gets over 90 degrees, along with Don Racine at Mini Mania.This thread was not intended to be a discussion about who's car, or who's equipment works best, but about how to take measurements to arrive at the definitive...
  6. carockwell

    Mini Cooper Cooling Testing

    Ummmm..I live in SoCal (Newport Beach), lots of people don't drive their Minis around on the street when it gets hot.
  7. carockwell

    Mini Cooper Cooling Testing

    Kind of impressive that you can keep your Mini cool at 110 degrees F. This thread was meant to get at the basic engineering problem with the side mounted radiators, not so much to learn what parts will keep a Mini cool. I had been thinking that the problem was either insufficient pressure drop...
  8. carockwell

    Flow Conditioning In Tube

    1. Where can we get small quantities of honeycomb? 2. The laminar flow tube is used to measure the static and total pressures of the airflow in a ventilation hose. The flow tube is installed for test purposes only.We connect a vaccum fan to the laminar flow tube and draw air through a large...
  9. carockwell

    Mini Cooper Cooling Testing

    This thread is for the original Mini that was discontinued in 2001. The early Mini's used a side mounted radiator that fit in the left side wheel well. Air enters through the front of the car , takes a 90 degree turn and is pushed through the wheel well by an engine driven fan.The Mini has...
  10. carockwell

    Flow Conditioning In Tube

    We are trying to measure the air velocity and pressure in aircraft air conditioning hoses. We have been using "laminar flow tubes", basically just long straight tubes about 15 times the diameter of the hose. Now we are flowing more air, which means we have increased our hose sizes. The laminar...

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