Today's Message Index:
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1. 06:12 AM - Re: Covering Ailerons of YAK (Roger Kemp)
2. 06:28 AM - Re: Covering Ailerons of YAK (Roger Kemp)
3. 06:50 AM - Flying at the edge of the envelope, VGs whistle. (motoadve)
4. 09:42 AM - Re: Flying at the edge of the envelope, VGs whistle. (Warren Hill)
5. 10:19 AM - Re: Flying at the edge of the envelope, VGs whistle. (motoadve)
6. 04:52 PM - Re: Re: Flying at the edge of the envelope, VGs whistle. (Warren Hill)
7. 06:31 PM - Re: Re: Flying at the edge of the envelope, VGs whistle. (William Geipel)
8. 08:07 PM - Re: Covering Ailerons of YAK (stephen.hayne)
Message 1
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| Subject: | Re: Covering Ailerons of YAK |
Walt,
Have had a great deal of help from 3 EAA gurus on stick and fabric airplanes. A
lot of tricks learned from those 3.
It is a good thing I undertook this project. There were three cracked ribs along
with the trailing edge that were almost completely broken through. The two worst
were where the trim tab mounted. I now know why I had a ratcheting right
snap roll.
To stiffen it some RU Afro engineer put a strip of 1/8 inch x 1 inch flat plate
steel 1/2 of the length of the trailing edge. None of that mod was found in
the right aileron.
It was a good thing I tore it down. That one was about to test my piloting skills.
Doc
Sent from my iPad
> On Mar 30, 2019, at 10:47 PM, Walter Lannon <wlannon@shaw.ca> wrote:
>
>
> That's great Doc. Hope it all works out well for you.
>
> Walt
>
> -----Original Message----- From: Roger Kemp
> Sent: Saturday, March 30, 2019 7:43 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Covering Ailerons of YAK
>
>
> To late Walt. I have one Aileron left to cover.
> Doc
>
> Sent from my iPad
>
>> On Mar 29, 2019, at 12:57 PM, Walter Lannon <wlannon@shaw.ca> wrote:
>>
>>
>> Do yourself a huge favor Doc. Hire a pro.
>>
>> Cheers;
>> Walt
>>
>>
>> -----Original Message----- From: Roger Kemp Sent: Friday, March 29, 2019 7:02
AM To: yak-list@matronics.com Subject: Yak-List: Covering Ailerons of YAK
>>
>> Anybody done their on fabric on the YAK or CJ?
>> Doc
>>
>> Sent from my iPad
>>
>>
>>
>> ---
>> This email has been checked for viruses by Avast antivirus software.
>> https://www.avast.com/antivirus
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>>
>>
>>
>
>
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Message 2
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| Subject: | Re: Covering Ailerons of YAK |
Walt,
This is a pics of my rudder getting the MEK wipe down before applying poly s
pray. My tail feathers are poly sprayed now hanging on a rack in my hanger a
waiting the fourth coat of poly spray. Then I will paint them. ( with the he
lp of my EAA gurus). =F0=9F=98=9C=F0=9F=A5=B4
Sent from my iPad
> On Mar 30, 2019, at 10:47 PM, Walter Lannon <wlannon@shaw.ca> wrote:
>
>
> That's great Doc. Hope it all works out well for you.
>
> Walt
>
> -----Original Message----- From: Roger Kemp
> Sent: Saturday, March 30, 2019 7:43 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Covering Ailerons of YAK
>
>
> To late Walt. I have one Aileron left to cover. =F0=9F=A4
> Doc
>
> Sent from my iPad
>
>> On Mar 29, 2019, at 12:57 PM, Walter Lannon <wlannon@shaw.ca> wrote:
>>
>>
>> Do yourself a huge favor Doc. Hire a pro.
>>
>> Cheers;
>> Walt
>>
>>
>> -----Original Message----- From: Roger Kemp Sent: Friday, March 29, 2019 7
:02 AM To: yak-list@matronics.com Subject: Yak-List: Covering Ailerons of YA
K
>>
>> Anybody done their on fabric on the YAK or CJ?
>> Doc
>>
>> Sent from my iPad
>>
>>
>>
>> ---
>> This email has been checked for viruses by Avast antivirus software.
>> https://www.avast.com/antivirus
>>
>>
>>
>>
>
>
>
>
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Message 3
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| Subject: | Flying at the edge of the envelope, VGs whistle. |
Love Vgs, has them on my Cessna 182 , my Nanchang also has them, I dont fly that
one at the end of the envelope, and it does not make the whistle, however, they
work nicely too.
https://www.youtube.com/watch?v=IpWHCgYRNLI
--------
www.Backcountry182.com
Cessna 182 P
CJ -6
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=488377#488377
Message 4
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| Subject: | Re: Flying at the edge of the envelope, VGs whistle. |
Lovely videos. Many years ago, Charles White in Seattle, his flight test
engineer and I did a VG scheme for my CJ for the wing, horizontal
stabilizer and vertical stabilizer. Did yarn tufting with simultaneous
video recording of the airspeed indicator and the wing. Moved the line
of VGs on the wing forward and aft until the stall speed was reduced by
10% with the boundary layer for the ailerons remaining protected. This
was at an 8% cord line. Before and after the dihedral break, the wing of
the CJ is closest to the NACA 230-16.5 and 4412 airfoils. Aside from a
slower stall speed, the only other difference is that there appears to
be less warning for the stall as I approach 55 KIAS. The VGs on the
vertical stabilizer also appear to give it a little more rudder
authority. Because kinetic energy is a squared function, the touchdown
at 75 and at 65 KIA is noticeably different. Overall, have been very
pleased with how this project turned out and feel it has made the
airplane safer. The attached image shows the line of VGs along he
leading edge.
Warren Hill
N464TW
Mesa, AZ
> On Mar 31, 2019, at 6:50 AM, motoadve <motoadve@racsa.co.cr> wrote:
>
>
> Love Vgs, has them on my Cessna 182 , my Nanchang also has them, I
dont fly that one at the end of the envelope, and it does not make the
whistle, however, they work nicely too.
>
> https://www.youtube.com/watch?v=IpWHCgYRNLI
>
> --------
> www.Backcountry182.com
> Cessna 182 P
> CJ -6
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=488377#488377
>
>
>
>
>
>
>
>
>
Message 5
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| Subject: | Re: Flying at the edge of the envelope, VGs whistle. |
Can you show me pictures of were are they installed in the vertical fin and horizontal
stab?
Mine only has them on the wing, wonder if under the horizontal stab will increase
the reduction in stall speed even more.
--------
www.Backcountry182.com
Cessna 182 P
CJ -6
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=488379#488379
Message 6
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| Subject: | Re: Flying at the edge of the envelope, VGs whistle. |
Will take some pictures the next time I=99m at the airport. The
placement of the VGs on the vertical stabilizer and the horizontal
stabilizer is not critical and the company supplies a generic template
for this. Here is their contact information.
https://microaero.com <https://microaero.com/>
Some meaningful insights into how all of this influences the performance
of the wing came during testing with yarn tufting. This allows for
visualization of the boundary layer breaking down as the stall is
approached. Attached is an image taken form the rear cockpit as the
stall was developing around 57 KIAS. By 55 KIAS, the airflow pattern was
completely disrupted out halfway between the dihedral break and inboard
edge of the aileron.
> On Mar 31, 2019, at 10:19 AM, motoadve <motoadve@racsa.co.cr> wrote:
>
>
> Can you show me pictures of were are they installed in the vertical
fin and horizontal stab?
> Mine only has them on the wing, wonder if under the horizontal stab
will increase the reduction in stall speed even more.
>
> --------
> www.Backcountry182.com
> Cessna 182 P
> CJ -6
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=488379#488379
>
>
>
>
>
>
>
>
>
Message 7
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| Subject: | Re: Flying at the edge of the envelope, VGs whistle. |
DID THEY TELL YOU WHERE TO MOUNT THEM?
> On Mar 31, 2019, at 18:51, Warren Hill <hill@doctor-hill.com> wrote:
>
> Will take some pictures the next time I=99m at the airport. The
placement of the VGs on the vertical stabilizer and the horizontal
stabilizer is not critical and the company supplies a generic template
for this. Here is their contact information.
>
> https://microaero.com <https://microaero.com/>
>
> Some meaningful insights into how all of this influences the
performance of the wing came during testing with yarn tufting. This
allows for visualization of the boundary layer breaking down as the
stall is approached. Attached is an image taken form the rear cockpit as
the stall was developing around 57 KIAS. By 55 KIAS, the airflow pattern
was completely disrupted out halfway between the dihedral break and
inboard edge of the aileron.
>
>
>
> <DSC03587.JPG>
>
>
>
>> On Mar 31, 2019, at 10:19 AM, motoadve <motoadve@racsa.co.cr
<mailto:motoadve@racsa.co.cr>> wrote:
>>
<mailto:motoadve@racsa.co.cr>>
>>
>> Can you show me pictures of were are they installed in the vertical
fin and horizontal stab?
>> Mine only has them on the wing, wonder if under the horizontal stab
will increase the reduction in stall speed even more.
>>
>> --------
>> www.Backcountry182.com <http://www.backcountry182.com/>
>> Cessna 182 P
>> CJ -6
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=488379#488379
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
Message 8
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| Subject: | Re: Covering Ailerons of YAK |
I had never done this before, and I did mine with the oversight of an EAA guru
too. It was so cool to learn how to do this!
I could have done them better, but hey, 100 hours and they still look good. I
also had a cracked trailing edge that I fixed. Here is a link to my "New Fabric"
album...
https://photos.app.goo.gl/AnatC9pxLqJFNSxE9
--------
-
Dr. Stephen C. Hayne, Professor, CIS, Colorado State University
666CJA
http://selfsynchronize.com/hayne/plane/cj6.asp
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=488391#488391
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