KR> First flight of the year

[John Bouyea]

At the risk of a "me too" I got 30 minutes in the Cardinal and an hour in
N5391M today, practiced some slow flight, approaching the full stall break
and just 1 landing to tuck it away safely. Hoping to get out again tomorrow.
Clear winter days in Oregon are a wonderful thing.

-Original Message-
Sent: Thursday, January 01, 2015 8:04 PM
Subject: KR> First flight of the year

Well, since Mark Jones didn't pipe up with "first flight of the year" 
news, I guess I should take up his slack.  I flew 1.8 hours today, doing ...
Mark Langford

KR> Bellyboard

[Rogelio M. Serrano Jr.]

Normal means perpendicular. Its just a mathematical term.

On Jan 1, 2015 7:05 PM, "gluejam via KRnet"  wrote:
>
> Mike -
>
> Perhaps you can explain why in the report the term, "/normal to the
airflow/" rather 'than parallel with', or 'perpendicular to' the airflow is
used.   Is that a common reference in the UK? It just seems a little
nebulous to me in understanding immediately upon reading the report, and it
would seem sensible to think that normal would be in line with airflow . . .
> but then ours (US) is a lower grade society, after all !!
>
> George
> 
>
>
>
> On 12/31/2014 6:19 AM, Mike via KRnet wrote:
>>
>> A little science from English researchers in 1957
>> http://naca.central.cranfield.ac.uk/reports/arc/cp/0323.pdf but I'm sure
>> there must be more recent published findings from elsewhere.
>>
>> This suggests that a solid airbrake produces a bubble of reduced airflow
>> behind the brake with airflow velocity fluctuations occurring around the
>> edge of the brake which may cause vibrations to the structure.
Perforations
>> in the airbrake reduce this effect and were found to be more effective
>> towards the centre of the plate than around the periphery.
>>
>>  From the Pprune forum, this explanation was offered: "Perforation
reduces
>> buffeting downrange of the speed brake, and reduces its interference with
>> flying surfaces or the fuselage or wing or horizontal stab. Remember, the
>> speed brake is there to create drag, but not undesirable flight
>> characteristics. A perforated brake doesn't create nearly the airflow
>> disruption, pitch change, or load on the surrounding and supporting
>> structure that a solid brake might create. The number and placement of
holes
>> are important considerations, and part of the design. Holes permit a
lighter
>> structure that takes less of an airload, reducing not only the weight of
the
>> brake assembly but the force required to actuate it and the structure
around
>> it that must support the load. Remember that much of the time, that speed
>> brake isn't anything but dead weight."
>>
>> Mike Mold
>> Devon, UK.
>>
>> -Original Message-
>> From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of Mac
>> McConnell-Wood via KRnet
>> Sent: 31 December 2014 10:35
>> To: Herbert F?rle; KRnet
>> Subject: Re: KR> Bellyboard
>>
>> The RAF Vulcan bomber had solid airbrakes-no holes (which enabled this 90
>> ton delta to descend vertically-..been there..)
>> Mac
>>
>> On Wed, Dec 31, 2014 at 9:51 AM, Herbert F?rle 
wrote:
>>
>>> any Test,however it is performed,gives a lot of informations! The
>>> aerodynamic principles are always the same ,also in the case of the hot"
>>> bellyboard -drag" discusion.For me it's important the location of the
>>
>> board
>>>
>>> and I think the place underneath the rearspar is very well chosen ( far
>>> enough behind the CG ,to give the Kr a small amount of direction
stability
>>> like a dragchute and the waketurbulences does'nt hit the HS !) I 'm
>>> convinced,a board without holes  are more effectiv ( one big
>>
>> waketurbulence
>>>
>>> produce more drag compared to many small ones).
>>> I'm also think,a big advantage of the bellyboard is the fact ,that you
can
>>> lower the nose of the Kr on final for better sight( wether you have to
>>
>> push
>>>
>>> or pull the stik )!
>>> Herbert
>>> German Kr builder .
>>>
>>>
>>> Von meinem iPad gesendet
>>> ___
>>> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
>>> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
>>> please see other KRnet info at http://www.krnet.org/info.html
>>> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to
change
>>> options
>>>
>> ___
>> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
>> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
>> please see other KRnet info at http://www.krnet.org/info.html
>> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change
>> options
>>
>>
>> ___
>> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
>> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
>> please see other KRnet info at http://www.krnet.org/info.html
>> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to
change options
>
>
>
>
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> This email has been checked for viruses by Avast antivirus software.
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>
> ___
> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
> please see other KRnet info at http://www.krnet.org/info.html
> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to 

KR> Sealant

[Dan Heath]

Jeff,



Have you used Proseal on fiberglass tanks?  I was going to suggest that, but 
did not know how well it worked with Plastic or fiberglass.



See N64KR at   http://KRBuilder.org - Then click on the 
pics 



2015 KR Gathering - McMinnville, OR.  September 3 - 6 -- See U There.



Peoples Choice at 2013 - KR Gathering in Mt. Vernon, Il ? MVN 

Best KR at 2013 - KR Gathering in Mt. Vernon, Il ? MVN 

Best Interior at 2013 - KR Gathering in Mt. Vernon, Il ? MVN 

Best Paint at 2013 - KR Gathering in Mt. Vernon, Il ? MVN 

Best Firwwall Forward at 2013 - KR Gathering in Mt. Vernon, Il ? MVN 



Best Interior and Panel at 2008 ? KR Gathering in Mt. Vernon, Il - MVN





Daniel R. Heath - Lexington, SC







-Original Message-



Seems like a reasonable application for some pro-seal.



-Jeff Scott

KR> Sealant

[Dan Heath]

Joe,



By plastic, do you mean fiberglass?  The fittings in the fiberglass tank in the 
KR are secured in place with a flox resin mixture.  Use Vinyl Ester resin and 
you should never have a problem with it.



My Panther Building Documentation at   
PantherBuilder Web Site



Daniel R. Heath - Lexington, SC

-Original Message-



I have a need to find a suitable sealant to put around the fittings that are 
installed in plastic ?? fuel tanks.  there is a aluminum fitting that is held 
in the tank wall or base with a large washer and nut

KR> Sealant

[Joe. E. Wallace]

KR Group, First of all Happy New Year to all. 

 I?m in the process of building a different airplane, but have followed this 
site for a long time.  Way too much good info to stay away.  I have a need to 
find a suitable sealant to put around the fittings that are installed in 
plastic ?? fuel tanks.  there is a aluminum fitting that is held in the tank 
wall or base with a large washer and nut, also a small rubber o-ring that is 
squeezed between the washer and the tank .  Seems a bit fragile to me and 
wondering if I can?t strenthen the seal with a semi-liquid sealant that would 
stand up to the fuel?  I can?t find a caulking or sealant that is resistant to 
fuel?  any ideas? tnx  jw

Joe. E. Wallace
jwallacep51 at gmail.com

KR> Bellyboard

[Rogelio M. Serrano Jr.]

On Jan 1, 2015 1:36 PM, "Mac McConnell-Wood via KRnet" 
wrote:
>
> Avro's should have read that before designing the Vulcan air
> brakesfancy putting those solid slabs upwind of the flying controls..!
>
> See the pairs of yellow lines indicating position.
>

That main control surfaces on a Delta wing is way out of the turbulence of
the air brake...

The vert is humongous!

> Regards and a HNY to all our readers
> Mac
>
> On Wed, Dec 31, 2014 at 1:19 PM, Mike via KRnet 
> wrote:
>
> > A little science from English researchers in 1957
> > http://naca.central.cranfield.ac.uk/reports/arc/cp/0323.pdf but I'm sure
> > there must be more recent published findings from elsewhere.
> >
> > This suggests that a solid airbrake produces a bubble of reduced airflow
> > behind the brake with airflow velocity fluctuations occurring around the
> > edge of the brake which may cause vibrations to the structure.
Perforations
> > in the airbrake reduce this effect and were found to be more effective
> > towards the centre of the plate than around the periphery.
> >
> > From the Pprune forum, this explanation was offered: "Perforation
reduces
> > buffeting downrange of the speed brake, and reduces its interference
with
> > flying surfaces or the fuselage or wing or horizontal stab. Remember,
the
> > speed brake is there to create drag, but not undesirable flight
> > characteristics. A perforated brake doesn't create nearly the airflow
> > disruption, pitch change, or load on the surrounding and supporting
> > structure that a solid brake might create. The number and placement of
> > holes
> > are important considerations, and part of the design. Holes permit a
> > lighter
> > structure that takes less of an airload, reducing not only the weight of
> > the
> > brake assembly but the force required to actuate it and the structure
> > around
> > it that must support the load. Remember that much of the time, that
speed
> > brake isn't anything but dead weight."
> >
> > Mike Mold
> > Devon, UK.
> >
> > -Original Message-
> > From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of Mac
> > McConnell-Wood via KRnet
> > Sent: 31 December 2014 10:35
> > To: Herbert F?rle; KRnet
> > Subject: Re: KR> Bellyboard
> >
> > The RAF Vulcan bomber had solid airbrakes-no holes (which enabled this
90
> > ton delta to descend vertically-..been there..)
> > Mac
> >
> > On Wed, Dec 31, 2014 at 9:51 AM, Herbert F?rle 
> > wrote:
> >
> > >
> > > any Test,however it is performed,gives a lot of informations! The
> > > aerodynamic principles are always the same ,also in the case of the
hot"
> > > bellyboard -drag" discusion.For me it's important the location of the
> > board
> > > and I think the place underneath the rearspar is very well chosen (
far
> > > enough behind the CG ,to give the Kr a small amount of direction
> > stability
> > > like a dragchute and the waketurbulences does'nt hit the HS !) I 'm
> > > convinced,a board without holes  are more effectiv ( one big
> > waketurbulence
> > > produce more drag compared to many small ones).
> > > I'm also think,a big advantage of the bellyboard is the fact ,that you
> > can
> > > lower the nose of the Kr on final for better sight( wether you have to
> > push
> > > or pull the stik )!
> > > Herbert
> > > German Kr builder .
> > >
> > >
> > > Von meinem iPad gesendet
> > > ___
> > > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
> > > To UNsubscribe from KRnet, send a message to
KRnet-leave at list.krnet.org
> > > please see other KRnet info at http://www.krnet.org/info.html
> > > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to
> > change
> > > options
> > >
> > ___
> > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
> > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
> > please see other KRnet info at http://www.krnet.org/info.html
> > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to
change
> > options
> >
> >
> > ___
> > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
> > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
> > please see other KRnet info at http://www.krnet.org/info.html
> > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to
change
> > options
> >
>
> ___
> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
> please see other KRnet info at http://www.krnet.org/info.html
> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change
options
>

KR> Bellyboard

[Rogelio M. Serrano Jr.]

Vulcan's are made of chunky aluminium. Its designed to handle all the
stress. And at the speeds they fly the aerodynamics is different.

Solid belly boards for krs would work fine. Those with holes are way more
efficient though.

You are the chief aerodynamicist! Take your pick!

On Jan 1, 2015 1:36 PM, "Mac McConnell-Wood via KRnet" 
wrote:
>
> Avro's should have read that before designing the Vulcan air
> brakesfancy putting those solid slabs upwind of the flying controls..!
>
> See the pairs of yellow lines indicating position.
>
> Regards and a HNY to all our readers
> Mac
>
> On Wed, Dec 31, 2014 at 1:19 PM, Mike via KRnet 
> wrote:
>
> > A little science from English researchers in 1957
> > http://naca.central.cranfield.ac.uk/reports/arc/cp/0323.pdf but I'm sure
> > there must be more recent published findings from elsewhere.
> >
> > This suggests that a solid airbrake produces a bubble of reduced airflow
> > behind the brake with airflow velocity fluctuations occurring around the
> > edge of the brake which may cause vibrations to the structure.
Perforations
> > in the airbrake reduce this effect and were found to be more effective
> > towards the centre of the plate than around the periphery.
> >
> > From the Pprune forum, this explanation was offered: "Perforation
reduces
> > buffeting downrange of the speed brake, and reduces its interference
with
> > flying surfaces or the fuselage or wing or horizontal stab. Remember,
the
> > speed brake is there to create drag, but not undesirable flight
> > characteristics. A perforated brake doesn't create nearly the airflow
> > disruption, pitch change, or load on the surrounding and supporting
> > structure that a solid brake might create. The number and placement of
> > holes
> > are important considerations, and part of the design. Holes permit a
> > lighter
> > structure that takes less of an airload, reducing not only the weight of
> > the
> > brake assembly but the force required to actuate it and the structure
> > around
> > it that must support the load. Remember that much of the time, that
speed
> > brake isn't anything but dead weight."
> >
> > Mike Mold
> > Devon, UK.
> >
> > -Original Message-
> > From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of Mac
> > McConnell-Wood via KRnet
> > Sent: 31 December 2014 10:35
> > To: Herbert F?rle; KRnet
> > Subject: Re: KR> Bellyboard
> >
> > The RAF Vulcan bomber had solid airbrakes-no holes (which enabled this
90
> > ton delta to descend vertically-..been there..)
> > Mac
> >
> > On Wed, Dec 31, 2014 at 9:51 AM, Herbert F?rle 
> > wrote:
> >
> > >
> > > any Test,however it is performed,gives a lot of informations! The
> > > aerodynamic principles are always the same ,also in the case of the
hot"
> > > bellyboard -drag" discusion.For me it's important the location of the
> > board
> > > and I think the place underneath the rearspar is very well chosen (
far
> > > enough behind the CG ,to give the Kr a small amount of direction
> > stability
> > > like a dragchute and the waketurbulences does'nt hit the HS !) I 'm
> > > convinced,a board without holes  are more effectiv ( one big
> > waketurbulence
> > > produce more drag compared to many small ones).
> > > I'm also think,a big advantage of the bellyboard is the fact ,that you
> > can
> > > lower the nose of the Kr on final for better sight( wether you have to
> > push
> > > or pull the stik )!
> > > Herbert
> > > German Kr builder .
> > >
> > >
> > > Von meinem iPad gesendet
> > > ___
> > > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
> > > To UNsubscribe from KRnet, send a message to
KRnet-leave at list.krnet.org
> > > please see other KRnet info at http://www.krnet.org/info.html
> > > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to
> > change
> > > options
> > >
> > ___
> > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
> > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
> > please see other KRnet info at http://www.krnet.org/info.html
> > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to
change
> > options
> >
> >
> > ___
> > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
> > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
> > please see other KRnet info at http://www.krnet.org/info.html
> > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to
change
> > options
> >
>
> ___
> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
> please see other KRnet info at http://www.krnet.org/info.html
> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change
options
>

KR> Bellyboard

[gluejam]

Mike -

Perhaps you can explain why in the report the term, "/normal to the 
airflow/" rather 'than parallel with', or 'perpendicular to' the airflow 
is used.   Is that a common reference in the UK? It just seems a little 
nebulous to me in understanding immediately upon reading the report, and 
it would seem sensible to think that normal would be in line with 
airflow . . .
but then ours (US) is a lower grade society, after all !!

George



On 12/31/2014 6:19 AM, Mike via KRnet wrote:
> A little science from English researchers in 1957
> http://naca.central.cranfield.ac.uk/reports/arc/cp/0323.pdf but I'm sure
> there must be more recent published findings from elsewhere.
>
> This suggests that a solid airbrake produces a bubble of reduced airflow
> behind the brake with airflow velocity fluctuations occurring around the
> edge of the brake which may cause vibrations to the structure. Perforations
> in the airbrake reduce this effect and were found to be more effective
> towards the centre of the plate than around the periphery.
>
>  From the Pprune forum, this explanation was offered: "Perforation reduces
> buffeting downrange of the speed brake, and reduces its interference with
> flying surfaces or the fuselage or wing or horizontal stab. Remember, the
> speed brake is there to create drag, but not undesirable flight
> characteristics. A perforated brake doesn't create nearly the airflow
> disruption, pitch change, or load on the surrounding and supporting
> structure that a solid brake might create. The number and placement of holes
> are important considerations, and part of the design. Holes permit a lighter
> structure that takes less of an airload, reducing not only the weight of the
> brake assembly but the force required to actuate it and the structure around
> it that must support the load. Remember that much of the time, that speed
> brake isn't anything but dead weight."
>
> Mike Mold
> Devon, UK.
>
> -Original Message-
> From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of Mac
> McConnell-Wood via KRnet
> Sent: 31 December 2014 10:35
> To: Herbert F?rle; KRnet
> Subject: Re: KR> Bellyboard
>
> The RAF Vulcan bomber had solid airbrakes-no holes (which enabled this 90
> ton delta to descend vertically-..been there..)
> Mac
>
> On Wed, Dec 31, 2014 at 9:51 AM, Herbert F?rle  
> wrote:
>
>> any Test,however it is performed,gives a lot of informations! The
>> aerodynamic principles are always the same ,also in the case of the hot"
>> bellyboard -drag" discusion.For me it's important the location of the
> board
>> and I think the place underneath the rearspar is very well chosen ( far
>> enough behind the CG ,to give the Kr a small amount of direction stability
>> like a dragchute and the waketurbulences does'nt hit the HS !) I 'm
>> convinced,a board without holes  are more effectiv ( one big
> waketurbulence
>> produce more drag compared to many small ones).
>> I'm also think,a big advantage of the bellyboard is the fact ,that you can
>> lower the nose of the Kr on final for better sight( wether you have to
> push
>> or pull the stik )!
>> Herbert
>> German Kr builder .
>>
>>
>> Von meinem iPad gesendet
>> ___
>> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
>> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
>> please see other KRnet info at http://www.krnet.org/info.html
>> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change
>> options
>>
> ___
> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
> please see other KRnet info at http://www.krnet.org/info.html
> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change
> options
>
>
> ___
> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
> please see other KRnet info at http://www.krnet.org/info.html
> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change 
> options



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KR> Happy New Years

[Dan Heath]

Happy New Year back to you Paul, and all the KR Family.



I had a great time at the Gathering in Chino this past year and am looking 
forward to another one in McMinnville this year.  See you then.



See N64KR at   http://KRBuilder.org - Then click on the 
pics 



2015 KR Gathering - McMinnville, OR.  September 3 - 6 -- See U There.



Peoples Choice at 2013 - KR Gathering in Mt. Vernon, Il ? MVN 

Best KR at 2013 - KR Gathering in Mt. Vernon, Il ? MVN 

Best Interior at 2013 - KR Gathering in Mt. Vernon, Il ? MVN 

Best Paint at 2013 - KR Gathering in Mt. Vernon, Il ? MVN 

Best Firwwall Forward at 2013 - KR Gathering in Mt. Vernon, Il ? MVN 



Best Interior and Panel at 2008 ? KR Gathering in Mt. Vernon, Il - MVN





Daniel R. Heath - Lexington, SC





-Original Message-



Happy New Years my KR family!



Paul Visk

KR> Happy New Years

[ppaulvsk]

Happy New Years my KR family!

Paul Visk
Belleville Il
618-406-4705


Sent on the new Sprint Network from my Samsung Galaxy S?4.