Hi Paul,

    Really enjoyed the talk you gave at scaled last week.

    Im in the middle of building new radiators for my olds powered tailwind and one of your comment on radiators I have not found info on?

    That is isolating the counter flow radiators thermally? Is this in the compact heat exchaners book? I have not found a reference to it?

    Thanks

    Tom Siegler


    No. The book Compact Heat Exchangers is all theory. No drawings of practical applications.
    I invented this specific configuration based on the theory in book. I just makes sense
     to isolate the input and output tanks thermally. Some people have tried to copy
    the idea and welded the tanks together defeating the effect. I use wood to isolate
    the two cores and the tanks.

    I works however!!! :-)

    The Tailwind V8 is inverted so there may be room under the engine.
    If you have room under the cowl you might be able to raise the
    V8 thrust line to give a little more room underneath..

    Not only is the Wankel very light for the HP it is
    also very small for the HP :-) With a normally aspirated p-port engine you can get
    250 HP at 7000 RPM.

    Here is another configuration we call the quick and simple. The bottom of the
    fuse is part of the diffuser. It adds a bit to the frontal area.

    One can actually see the heat flowing out of the bottom of the rad in
    this fantastic air to air photo.

    Paul Lamar


Paul, what is the aircraft in the last 2 pics, looks on floats.

Steve carlisle

It was a ultra lite before there were ultra lights. It had a man's name but the company
has disappeared with out a trace. Sold a lot of very innovative aircraft however.
It was somewhere in Kansas or the Midwest as I recall. They were all fabric covered
high wings mostly.


Ah here it is. It was a Rans.
https://www.rans.com/

Hays Kansas

Maybe he is just making bicycles now.


Paul Lamar


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