Today's Message Index:
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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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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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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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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.
>
>
>
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Message 4
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Subject: | Re: Drag Reduction Paradox |
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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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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Subject: | Re: Drag Reduction Paradox |
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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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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