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Thread: Czech Mate

  1. #1
    Join Date
    Aug 2002
    Location
    Reno, Nevada
    Posts
    2,828

    Default Czech Mate

    Just finished.
    Insulated cups, coffee mugs, etc. available soon!

    Blue Skies Sherm!
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Leo Smiley - Graphics and Fine Arts
    airplanenutleo@gmail.com
    thetreasuredpeacock.etsy.com

  2. #2
    Join Date
    Aug 2006
    Location
    Rosamond, CA
    Posts
    309

    Default Re: Czech Mate

    She looks good, Sir! I'll miss her and Mr. Smoot ripping up the sky! Thanks for posting!

    ....still heartbroken

    -spinny
    Eddie's Airplane Patch-Birthplace of the "Sonic Boom".......and I'm reminded every friggin' day!

  3. #3
    Join Date
    May 2015
    Location
    FINLAND
    Posts
    226

    Thumbs up Re: Czech Mate

    Awesome drawing/painting.

    What is the efficiency of those clipped props ?

  4. #4
    Join Date
    Feb 2009
    Location
    Napa, CA
    Posts
    185

    Default Re: Czech Mate

    Quote Originally Posted by Jukka View Post
    Awesome drawing/painting.

    What is the efficiency of those clipped props ?
    Simplicity. When Precious Metal had the clipped prop tips CNC profiled it picked up 56 MPH.

  5. #5
    Join Date
    May 2015
    Location
    FINLAND
    Posts
    226

    Default Re: Czech Mate

    Quote Originally Posted by Plane Nuts View Post
    Simplicity. When Precious Metal had the clipped prop tips CNC profiled it picked up 56 MPH.
    So they are very efficient then.

  6. #6
    Join Date
    Feb 2009
    Location
    Napa, CA
    Posts
    185

    Default Re: Czech Mate

    Quote Originally Posted by Jukka View Post
    So they are very efficient then.
    Let me expand on my reply. When a propeller that is too large is fitted to an airplane the blades are shortened with a straight cut because it is simple and costs less not for efficiency. Attached is a photo of a CNC profiled blade on Precious Metal which gave a 56 MPH increase in speed.
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  7. #7

    Default Re: Czech Mate

    In the case of Czech Mate, I believe the prop was actually too small for the power produced, but it HAD to be the size it was due to the lack of ground clearance. They still had to run the oleos pumped all the way up, as well as take off and land in a 3 point attitude, like Rare Bear, for the same reason.

    The square tips may or may not have been efficient, it might have been interesting to see if reprofiled tips would have given them more speed they way they did with Precious Metal. Sadly we will never know. I think CM could have had more speed in it with some further refinements, but who knows. Hopefully the interest to build a similar racer will be kindled and we can find out in the future.

    Will

  8. #8
    Join Date
    Sep 2004
    Location
    Houston, TX
    Posts
    241

    Default Re: Czech Mate

    Quote Originally Posted by RAD2LTR View Post
    In the case of Czech Mate, I believe the prop was actually too small for the power produced, but it HAD to be the size it was due to the lack of ground clearance. They still had to run the oleos pumped all the way up, as well as take off and land in a 3 point attitude, like Rare Bear, for the same reason.

    The square tips may or may not have been efficient, it might have been interesting to see if reprofiled tips would have given them more speed they way they did with Precious Metal. Sadly we will never know. I think CM could have had more speed in it with some further refinements, but who knows. Hopefully the interest to build a similar racer will be kindled and we can find out in the future.

    Will
    Not to be insensitive or morbid, but is there anything left of CM's airframe to rebuild? I've seen the same question already come up about Texas Raiders, and there are hundreds of photos that answer that question. In CM's case, there are probably only a select few people that have seen the remains, so it makes one wonder. Could this be a similar situation to Tsunami?
    Thanks.

  9. #9

    Default Re: Czech Mate

    Quote Originally Posted by marada mx3 View Post
    Not to be insensitive or morbid, but is there anything left of CM's airframe to rebuild? I've seen the same question already come up about Texas Raiders, and there are hundreds of photos that answer that question. In CM's case, there are probably only a select few people that have seen the remains, so it makes one wonder. Could this be a similar situation to Tsunami?
    Thanks.
    I have no clue what was left. I'm sure it could be rebuilt as Yaks are a tube frame fuselage, but I think it would make sense to start over with a new airframe altogether. There are plenty of Yak 11s out there. Add a wing with a better airfoil and perhaps move the cockpit forward (from where CMs was) a little, and off you go.

    Will

  10. #10
    Join Date
    Aug 2007
    Location
    San Diego, CA
    Posts
    2,221

    Default Re: Czech Mate

    Quote Originally Posted by marada mx3 View Post
    Not to be insensitive or morbid, but is there anything left of CM's airframe to rebuild? I've seen the same question already come up about Texas Raiders, and there are hundreds of photos that answer that question. In CM's case, there are probably only a select few people that have seen the remains, so it makes one wonder. Could this be a similar situation to Tsunami?
    Thanks.
    From the story it was hard to determine how the impact was, but the prelim NTSB report had a photo of CM?s attitude towards the ground, and I would say there isn?t much left.
    *My Air Race Site*

    Reno from '99 to '21

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