At 07:19 AM 12/31/2014, you wrote: >A little science from English researchers in 1957 >http://naca.central.cranfield.ac.uk/reports/arc/cp/0323.pdf but I'm sure >there must be more recent published findings from elsewhere. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Mike, Thanks for the report. I looked for something similar the other day and found nothing. I guess that settles the discussion and eliminates the need for any additional testing. I doubt if any of our testing would meet the above standards anyway. Looks like flat plate with some holes more to the center to eliminate some unwanted turbulence downstream is the winner. It indicates that a few holes, in the center, do little to harm the drag numbers. My remaining question is the size of the holes in my 9"X30" brake. I'm guessing the answer lies somewhere amongst the X's and O's. Looks like I need to cover some of my perimeter holes and some of you fellows need to cut a few holes in your flat plates. Looks like we were all only half right. :-) Now you builders can get back to building. Happy New Year to all.......... Larry Flesner
