Kolb-List Digest Archive

Tue 03/11/14


Total Messages Posted: 7



Today's Message Index:
----------------------
 
     1. 01:37 AM - Re: Drag Reduction Paradox (George Bearden)
     2. 04:21 AM - Re: Re: Drag Reduction Paradox (John Hauck)
     3. 05:01 AM - Re: Re: Drag Reduction Paradox (Clyde MacQuarrie)
     4. 06:52 AM - Re: Drag Reduction Paradox (Richard Pike)
     5. 08:08 AM - Re: Re: Drag Reduction Paradox (Charlie England)
     6. 01:33 PM - Re: Drag Reduction Paradox (Richard Pike)
     7. 04:53 PM - Re: Re: Drag Reduction Paradox (Charlie England)
 
 
 


Message 1


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    Time: 01:37:42 AM PST US
    From: "George Bearden" <gab16@sbcglobal.net>
    Subject: Re: Drag Reduction Paradox
    > In my quest to reduce aerodynamic drag on my Mark-III I believe I kinda remember a Kolber saying that he gained significant increase in speed after he streamlined the struts. Have you seen this to be true? It may have been a Firestar, not sure.


    Message 2


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    Time: 04:21:14 AM PST US
    From: "John Hauck" <jhauck@elmore.rr.com>
    Subject: Re: Drag Reduction Paradox
    Was true on my Firestar. I started out with round struts. Then we fabricated lift strut from streamlined 4130. Was like flying a new airplane. I had difficulty slowing down on my 600 foot grass strip. Vibration like the old round struts was gone. Can't remember any numbers. That was in 1987. john h mkIII Titus, Alabama > In my quest to reduce aerodynamic drag on my Mark-III I believe I kinda remember a Kolber saying that he gained significant increase in speed after he streamlined the struts. Have you seen this to be true? It may have been a Firestar, not sure.


    Message 3


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    Time: 05:01:07 AM PST US
    From: Clyde MacQuarrie <clydemacquarrie@eastlink.ca>
    Subject: Re: Drag Reduction Paradox
    In 2011 I started taking flying lessons my Mark 3 with no covering on the struts. After someone posted the results of lab test done back in the forties showing the difference with streamlining the struts I was convinced it was the way to go. I installed the fairings before continuing my training in 2012 and noticed a big improvement in climb rate and speed. -------------------------------------------------- From: "George Bearden" <gab16@sbcglobal.net> Sent: Tuesday, March 11, 2014 5:36 AM Subject: Kolb-List: Re: Drag Reduction Paradox > >> In my quest to reduce aerodynamic drag on my Mark-III > > I believe I kinda remember a Kolber saying that he gained significant > increase in speed after he streamlined the struts. Have you seen this to > be > true? It may have been a Firestar, not sure. > > > --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com


    Message 4


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    Time: 06:52:51 AM PST US
    Subject: Re: Drag Reduction Paradox
    From: "Richard Pike" <richard@bcchapel.org>
    When I put streamline fairings over my aluminum tapered gear legs, I noticed an immediate change in trim, the airplane wanted to fly more nose up, presumably because of the reduction in gear leg drag well below the center of drag. Have converted over to the very old style machined and tapered steel gear legs which Kolb has not sold in years, but have not yet flown with them. They are substantially slimmer than the aluminum gear legs, but also a bit longer. Will be interesting to see if the trim changes. -------- Richard Pike Kolb MKIII N420P (420ldPoops) Kingsport, TN 3TN0 My soul shall be joyful in the LORD; It shall rejoice in His salvation. Psalm 35:9 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=420137#420137


    Message 5


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    Time: 08:08:40 AM PST US
    From: Charlie England <ceengland7@gmail.com>
    Subject: Re: Drag Reduction Paradox
    On 3/11/2014 3:36 AM, George Bearden wrote: > >> In my quest to reduce aerodynamic drag on my Mark-III > I believe I kinda remember a Kolber saying that he gained significant > increase in speed after he streamlined the struts. Have you seen this to be > true? It may have been a Firestar, not sure. > > The difference in round vs streamlined is *huge*. There's a drawing that's floating around the net showing the equivalent cross sections of a wire, a square rod, a streamline profile, etc that is almost unbelievable. I couldn't find it with a quick search, but I did find a link to an old Sport Aviation article (back when they had articles for homebuilders). Note carefully the decimal point locations. file:///C:/Users/Charlie/Downloads/Streamline_SAA.pdf Charlie


    Message 6


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    Time: 01:33:03 PM PST US
    Subject: Re: Drag Reduction Paradox
    From: "Richard Pike" <richard@bcchapel.org>
    ceengland7(at)gmail.com wrote: > On 3/11/2014 3:36 AM, George Bearden wrote: > > > > > > > > In my quest to reduce aerodynamic drag on my Mark-III > > I believe I kinda remember a Kolber saying that he gained significant > > increase in speed after he streamlined the struts. Have you seen this to be > > true? It may have been a Firestar, not sure. > > > > > > The difference in round vs streamlined is *huge*. There's a drawing > > > > that's floating around the net showing the equivalent cross sections of > a wire, a square rod, a streamline profile, etc that is almost > unbelievable. I couldn't find it with a quick search, but I did find a > link to an old Sport Aviation article (back when they had articles for > homebuilders). > Note carefully the decimal point locations. > > file:///C:/Users/Charlie/Downloads/Streamline_SAA.pdf > > Charlie Um - Charlie? I don't think that's a web url - I think it's a file on your hard drive. -------- Richard Pike Kolb MKIII N420P (420ldPoops) Kingsport, TN 3TN0 My soul shall be joyful in the LORD; It shall rejoice in His salvation. Psalm 35:9 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=420146#420146


    Message 7


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    Time: 04:53:54 PM PST US
    From: Charlie England <ceengland7@gmail.com>
    Subject: Re: Drag Reduction Paradox
    On 3/11/2014 3:32 PM, Richard Pike wrote: > > > ceengland7(at)gmail.com wrote: >> On 3/11/2014 3:36 AM, George Bearden wrote: >> >>> >>> >>>> In my quest to reduce aerodynamic drag on my Mark-III >>> I believe I kinda remember a Kolber saying that he gained significant >>> increase in speed after he streamlined the struts. Have you seen this to be >>> true? It may have been a Firestar, not sure. >>> >>> >>> The difference in round vs streamlined is *huge*. There's a drawing >>> >> that's floating around the net showing the equivalent cross sections of >> a wire, a square rod, a streamline profile, etc that is almost >> unbelievable. I couldn't find it with a quick search, but I did find a >> link to an old Sport Aviation article (back when they had articles for >> homebuilders). >> Note carefully the decimal point locations. >> >> file:///C:/Users/Charlie/Downloads/Streamline_SAA.pdf >> >> Charlie > > > Um - Charlie? I don't think that's a web url - I think it's a file on your hard drive. > > -------- > Richard Pike > Kolb MKIII N420P (420ldPoops) > Kingsport, TN 3TN0 > My soul shall be joyful in the LORD; It shall rejoice in His salvation. Psalm 35:9 > Uhhhh, oops. The link does indeed require a download of a pdf file, which then opened automatically in my web browser (chrome). I made the mistake of copying the url line & failed to notice that it pointed to the downloaded file instead of the site. It's actually on the Matronics server, but it's through the forum & I use regular email. Try this rather nasty link: https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0CC4QFjAB&url=http%3A%2F%2Fforums.matronics.com%2Fdownload.php%3Fid%3D12887%26sid%3D329d1844c4ac0988dc9552b9aed282b2&ei=-iQfU_ihFIfukQf7zYHACA&usg=AFQjCNFj7FR4iMleClzW5i3rcXQrdvynyg&sig2=2iAaS9k5dhi0fiG73RMRqA Charlie




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