KR> KR2S Specs - thanks

[Virgil Salisbury]

Use 400/600 wet, chordwise strokes. Miniture wing fences, Virg

On Tue, 4 May 2004 18:57:26 +0200 "Cellcool" 
writes:
> Larry, The glider boys have found that if you matt your wing the drag 
> is
> appreciably less, hence before a contest you see all these fellows 
> flatting
> there wings with water paper.
> No one has explained this to me satisfactorily, has anyone  heard a
> plausible explanation
> Cheers
> John
> 
> 
> >>
>  polished to a mirror finish. Given the same engine and fuel
> > flow, they got an extra 30 knots. If you want speed, think glass 
> smooth
> > paint, >
> >
> 
> 
> 
> ___
> to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net
> please see other KRnet info at http://www.krnet.org/info.html
> 
> 


Virgil N. Salisbury - AMSOIL
www.lubedealer.com/salisbury
Miami ,Fl

KR> KR2S Specs - thanks

[larry severson]

At 06:57 PM 5/4/2004 +0200, you wrote:
>Larry, The glider boys have found that if you matt your wing the drag is
>appreciably less, hence before a contest you see all these fellows flatting
>there wings with water paper.
>No one has explained this to me satisfactorily, has anyone  heard a
>plausible explanation

Slow is not fast. To go slow, the best propeller is a long 1 bladed one, 
with a counter weight on the other side, turning at a slow rate. Parasite 
drag is not a significant factor at slow speeds, but air flow separation is 
because it can reduce lift. The matted wet paper creates the effect of mini 
vortex generators that help reduce the lift destroying air flow separation. 
Gliders GO SLOW!

You, on the other hand want to go fast!


Larry Severson
Fountain Valley, CA 92708
(714) 968-9852
lar...@socal.rr.com 

KR> KR2S Specs - thanks

[John Bouyea]

Regarding the current thread on going faster with smooth paint/ polished
aluminum;

The CAFÉ group of Northern California specifically ran tests less than 3
years ago on an extensively instrumented test bed airframe to determine
the effects of a “professional wax job” and resulting performance.  

Net test results:  
No difference between waxed and non-waxed surfaces
Huge differences in performance when measuring for smashed bugs on
leading edges

Check the index of EAA Sport Aviation magazine for the issue.

John Bouyea
KR2 - hanging the engine accessories
KR2S - boat hanging from the rafters

john_0...@bouyea.net
www.bouyea.net

KR> KR2S Specs - thanks

[Stephen Jacobs]

Troy Petteway's KR2 massaged 0-200. His plane will do more than
220 mph

Steve Alderman has a similar plane...radical 0-200 engine ... will push
220 mph

...


Really glad someone asked - I like the answer.  I accept that a quick KR
will take some dedication and compromise - but it can be done - thanks.

Both were using the old section (at the time) - maybe the new sections
make it a tad easier.

I was surprised at the exaggerated elevator trim on Steve Aldermans
(yellow) airplane in one of the pics from the attached URL - anyone know
why?

Steve J

KR> KR2S Specs - thanks

[Mark Langford]

Steve J wrote:

> Both were using the old section (at the time) - maybe the new sections
> make it a tad easier.

Troy's wouldn't break 200 mph with the VW engine and the old wing.  The
higher speeds came about after adding the new airfoil and the 0-200.

Mark Langford, Huntsville, Alabama
N56ML "at" hiwaay.net
see KR2S project at http://home.hiwaay.net/~langford

@SPAM++++++ KR> KR2S Specs - thanks

[gleone]

 Maybe I've missed something here, but isn't the Vne 200 mph  Why would
anyone want to drive it  beyond Vne?

When you give a lesson in meanness to a critter or a person, don't be
surprised if they learn their lesson.
---Original Message---

From: KRnet
List-Post: krnet@list.krnet.org
Date: 05/02/04 16:13:18
To: 'KRnet'
Subject: @SPAM++ KR> KR2S Specs - thanks

Troy Petteway's KR2 massaged 0-200. His plane will do more than
220 mph

Steve Alderman has a similar plane...radical 0-200 engine ... will push
220 mph

...


Really glad someone asked - I like the answer. I accept that a quick KR
will take some dedication and compromise - but it can be done - thanks.

Both were using the old section (at the time) - maybe the new sections
make it a tad easier.

I was surprised at the exaggerated elevator trim on Steve Aldermans
(yellow) airplane in one of the pics from the attached URL - anyone know
why?

Steve J




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to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net
please see other KRnet info at http://www.krnet.org/info.html

KR> KR2S Specs - thanks

[Brian Kraut]

I spoke to Troy just yesterday.  He told me his cruise speed is about
185-190 Knots, yes, Knots.  He also said he will be at this years gathering.

Brian Kraut
Engineering Alternatives, Inc.
www.engalt.com

-Original Message-
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On
Behalf Of Stephen Jacobs
Sent: Sunday, May 02, 2004 6:13 PM
To: 'KRnet'
Subject: KR> KR2S Specs - thanks


Troy Petteway's KR2 massaged 0-200. His plane will do more than
220 mph

Steve Alderman has a similar plane...radical 0-200 engine ... will push
220 mph

...


Really glad someone asked - I like the answer.  I accept that a quick KR
will take some dedication and compromise - but it can be done - thanks.

Both were using the old section (at the time) - maybe the new sections
make it a tad easier.

I was surprised at the exaggerated elevator trim on Steve Aldermans
(yellow) airplane in one of the pics from the attached URL - anyone know
why?

Steve J




___
to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net
please see other KRnet info at http://www.krnet.org/info.html

KR> KR2S Specs - thanks

[jehayw...@aol.com]

In a message dated 5/2/04 4:34:58 PM Mountain Daylight Time, n5...@hiwaay.net 
writes:

<<  Troy's wouldn't break 200 mph with the VW engine and the old wing.  The
 higher speeds came about after adding the new airfoil and the 0-200. >>

Any rough idea of how much was contributed by each one?

Jim Hayward
Rapid City, SD

KR> KR2S Specs - thanks

[Brian Kraut]

When I spoke to Troy a few days ago I asked basically the same question.  He
really didn't know, but he said that the new wing was definitely a lot less
drag.  He could easily tell in a power off dive that he picked up speed a
lot faster.

Some other notes:

He shortened the wing about 2'.  The empty weight also went up due to the
engine change.  His stall speed increased about 5 Kts, but he suspects that
is due to the weight and the shorter wing, not the airfoil change.  He only
has 1 degree incidence.  He said it stalls fine and doesn't tend to drop a
wing unless he has some power in.  He has not spun it.

One other interresting thing he said was that he didn't have a good climb
rate until he put on the bottom aileron gap seals like Mark details on the
new wing site.  He recommends not even doing any flight testing without the
bottom seals installed.

His weight is 620 empty and he has had 440 pounds of people plus fuel in it.
I think he said he weighs around 220, so his high cruise speeds are probably
around 900 pounds or more with just him and fuel.

Brian Kraut
Engineering Alternatives, Inc.
www.engalt.com

-Original Message-
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On
Behalf Of jehayw...@aol.com
Sent: Sunday, May 02, 2004 10:02 PM
To: kr...@mylist.net
Subject: Re: KR> KR2S Specs - thanks


In a message dated 5/2/04 4:34:58 PM Mountain Daylight Time,
n5...@hiwaay.net
writes:

<<  Troy's wouldn't break 200 mph with the VW engine and the old wing.  The
 higher speeds came about after adding the new airfoil and the 0-200. >>

Any rough idea of how much was contributed by each one?

Jim Hayward
Rapid City, SD

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KR> KR2S Specs - thanks

[larry severson]

><<  Troy's wouldn't break 200 mph with the VW engine and the old wing.  The
>  higher speeds came about after adding the new airfoil and the 0-200. >>
>
> Any rough idea of how much was contributed by each one?

Indisputable evidence exists that reducing drag has a huge impact in speed. 
American Airlines, back in the days of DC-6s used to take them to Mexico 
and have them polished to a mirror finish. Given the same engine and fuel 
flow, they got an extra 30 knots. If you want speed, think glass smooth 
paint, nothing sticking in the way of air flow, and a cowling that does not 
block the prop. A sharp profile are what made the P51 fast. Power will add 
speed and climb, but clean does more - Ken R also proved that!


Larry Severson
Fountain Valley, CA 92708
(714) 968-9852
lar...@socal.rr.com 

KR> KR2S Specs - thanks

[Cellcool]

Larry, The glider boys have found that if you matt your wing the drag is
appreciably less, hence before a contest you see all these fellows flatting
there wings with water paper.
No one has explained this to me satisfactorily, has anyone  heard a
plausible explanation
Cheers
John


>>
 polished to a mirror finish. Given the same engine and fuel
> flow, they got an extra 30 knots. If you want speed, think glass smooth
> paint, >
>