KR> CAD anyone?

[Phillip E. Harrison]

I agree TurboCad is a pretty functional inexpensive program. It's easy to
set up your environment, and use it. There is always a free 15 day free
download, but as usual you can not open saved files after the 15 days unless
you buy the program. I have used it for #D Designs since version 3 came out.


Here is their link- http://www.turbocad.com/ 


If an earlier version, would work for you I could send it to you free via
post I have gifted all but v-9,10,10.5

Phillip E. Harrison



 Penumbra


Design Studio
~Professional design services Est. 1988~

pharri...@penumbradesign.net

-Original Message-
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf
Of Barrett
Sent: Thursday, December 22, 2011 3:36 PM
To: 'KRnet'
Subject: KR> CAD anyone?

OK guys- I'm looking for some SUPER SIMPLE (and cheap) beginners CAD
software. While I am very computer literate, I've never used any type of CAD
software at all and have no idea where to start to use it. So, with that in
mind, what suggestions does anyone have? I usually just use some graph paper
and draw it out by hand, but in this case I'd rather have it done in CAD so
it can be saved for future reference. Thanks!
And MERRY CHRISTMAS to all,
-Barrett, SLC, UT


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KR> Tailwheel Endorsement

[Phillip E. Harrison]

Glen,
Congrats! 

Phillip E. Harrison



 Penumbra


Design Studio
~Professional design services Est. 1988~

pharri...@penumbradesign.net
-Original Message-
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf
Of Glenn Martin
Sent: Sunday, December 18, 2011 7:43 PM
To: KRnet
Subject: KR> Tailwheel Endorsement

As of 5PM CST today, I have my tailwheel endorsement! The BEST Christmas 
gift!

-- 
Glenn Martin,
KR2 N1333A,
Biloxi, MS

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KR> Re: KR2 spars

[Phillip E. Harrison]

Greg,   
I am working on a kr2 project. I brought it to University of Alabama
where the engineering guru's and their students are using it as a learning
tool.
One of the things they are exploring is composite spars with
removable out board wing sections using the as5048/46. They will build wing
spar with wing attach to test. I will be glad to share the results.
They also have decided to go with retractable gear. So I can offer
you / ( kr netters) the fixed gear, wheels...
Question: I see there is a combined 48/45 wing template set has
anyone built a 48/46?   Does anyone have insight/suggestions on this
combination?
Phillip 

-Original Message-
From: krnet-bounces+mistion=earthlink@mylist.net
[mailto:krnet-bounces+mistion=earthlink@mylist.net] On Behalf Of smwood
Sent: Monday, November 14, 2011 9:05 AM
To: kr...@mylist.net
Subject: KR> Re: KR2 spars

The Lancair 320/360 and the Pulsar XP have all composite construction, fuel 
in the wings and removable wings.  The Lancair wing spars are attached with 
only two bolts for both wings at the two common attachment points inside the

fuselage.

Sid Wood
Tri-gear KR-2 N6242
Mechanicsville, MD, USA
smw...@md.metrocast.net


--
Hi Dave

Many thanks the reply. I am well familiar with the KR2 Super and its 
website, have been studying it since February of this year as well as many 
other KR builders sites.

I like the KR2Super very much and building with composites is no problem for

me - been doing for about ten years for model RC planes ( a different story 
but composites are not new to me). As usual one sets out with a plan and a 
list of desires which normally are not fulfilled in every way by existing 
designs - in other words one tends to like different things about different 
designs but never finds the "ultimate solution". So I want a two seat, side 
by side and homebuilt from plans. It would be great if it could fit into LSA

limits (again a wishful thought). That led me to KR and the KR2S. Further 
research led me to alternative materials due to wood availability in my 
country. I found the KR Super and got excited.

Trouble for me though is I want the original wing design with WAF's, fixed 
undercarriage, fuel tanks in the stub wings and I want to put it onto a 
trailer to take home in winter and save storage cost for fuel! Scott's KR2 
Super does not allow for this with his spar design. I also like the way Mark

has rebuilt his wings - from the fotos it is a far simpler construction the 
the Supers but he used "beefed up" woodens spars.

I also find nothing difficult/complicated about the Supers spar design - 
website has excellent instructions, very good foto's and if followed 
correctly and taking care with the layups and methods an easy part to make.

I am by no means a designer and would be lying if I said I understood half 
the technical discussion on spar design so was hoping to compare what I have

found out and worked with to someone else who may be more familiar with the 
design aspects of a spar.

So back to my original question/query - has anyone designed alternative 
composite wing spars using the original WAF's mountings design idea?

thanks again

Greg
--




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KR> Heart Attack.

[Phillip E. Harrison]

Mike,
I'm glad to hear you are safe and sound. 
Phillip E. Harrison



 Penumbra


Design Studio
~Professional design services Est. 1988~

pharri...@penumbradesign.net
-Original Message-
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf
Of Mike Sylvester
Sent: Friday, November 18, 2011 2:27 PM
To: KRNET
Subject: KR> Heart Attack.


Guy's, As most of you know, I have been coming to the Gatherings for the
past 5 years and feel like everyone that I have met there has become a good
friend. Just wanted to let you guys know that I had a heart attack Wednesday
morning at the ripe old age of 50. Made it to the hospital where I received
a stint in the big artery at the front of the heart. Long story short, Got
home a couple of hours ago and am doing great. Now, hopefully with the help
from the EAA and AOPA I will have my license back before I finish the KR. 

Mike Sylvester 
kr2s builder 
Birmingham,AL.

Cell no.205-966-3854  
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KR> Lay-up

[Phillip E. Harrison]

I guess that makes 1002 uses

-Original Message-
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf
Of Glenn Martin
Sent: Friday, February 04, 2011 11:14 PM
To: KRnet
Subject: Re: KR> Lay-up

C'mon guys..Just be a real man and use  use DUCT TAPE



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KR> Lay-up

[Phillip E. Harrison]

Mark Langford,
It looks like I need to apologize. I had not intended to offend you
in any way and my second question was not a challenge to your authority. It
was intended as a segway to further the dialogue. I also apologize for
presenting what seemed to extol the virtues of Kevlar. I had written looking
for advice.

I do not have as practiced hand in composite construction or
airframe/airplane construction as you or most/all the others posting here.

I have purchased a kit as an educational platform to share the
experience with kids. As such I feel compelled to maintain an atmosphere
which continually questions why - or why not.

Over the years you and others have done the same leading a community
of like minds, each of them with their experiences and strengths. Each
adding knowledge built on truth discovered by others realized through
exploration and experimentation. This is what makes both community at large
and this community vital. All of written history is simply a ledger of this.

My first flight lesson was a transformative experience for me. If
any of these kids end up pilots, controllers, A mechanics wonderful. That
would be a tribute to the EAA, AOPA, Build-A-Plane and FAA programs they
will be introduced to in this program and the amazing experience of their
first flight.

While the physical experience of building an entire airplane will be
unique to everyone I will have done my job as an educator if I can get the
kids to engage their intellect and stimulate abstract development, get them
to THINK. A difficult and all to foreign concept in education these days.

I see the construction of such a complex device as a great learning
platform. I see it as an opportunity to expose kids to technology (abstract
intellectual knowledge) math, material sciences, chemistry, physic... in a
tangible way.

To me the benefits to the various aviation communities and the
greater community to this kind of program are unassailable. But only the
future will tell. How many of us dream of being Yeager and how many dream of
being the guy who introduced him to flight? I'm fine with being the latter -
and enjoying flying myself.

If I see you at the gathering or any other fly-in, I'd love to buy
you a beer.

Phillip Harrison 

-Original Message-
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf
Of Phillip E. Harrison
Sent: Friday, February 04, 2011 7:42 PM
To: 'KRnet'
Subject: RE: KR> Lay-up

Thanks for the advice

-Original Message-
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf
Of Mark Langford
Sent: Friday, February 04, 2011 6:28 PM
To: pharri...@penumbradesign.net; KRnet
Subject: Re: KR> Lay-up

Phillip Harrison wrote:

I' planning on a veil did you use one?

No, if you mean did I use a Kevlar veil.  That one thread was more Kevlar 
than I needed or wanted on the plane.

What you may be missing is that the real structure of a KR wing is the wood 
spar underneath the skin.  The skin's not going to fail unless you strike it

with something, and if they are carbon fiber you'll break out a chunk and 
either continue your crash or keep on going (if it was a Canadian goose). 
The only reason I used carbon fiber on my wings was because I could make the

wing a little lighter, yet much stronger (to minimize hangar rash and 
survive the inevitable runway light collision), and I could afford the extra

cost (back when CF was "cheap").

You asked for advice, and I guess that's mine.  You are welcome to use 
Kevlar and extol it's virtues after you're done.

This reminds me of a conversation I had with the chief engineer this 
afternoon.  He wanted some advice on cutting  cost out of a 10" diameter 
carbon fiber tube for a piece of space hardware that we were asked to quote 
to build.  Unidirectional prepreg CF tape .0002" thick was specified by the 
customer, which cost $700/lb, with a 25 pound minimum order. Wall thickness 
was called out as .040" to .090", so it was going to take something like 200

layers of this stuff wound around the tube to get to minimum thickness.  It 
took me about 2 seconds to bust out laughing...why would anybody specify the

most expensive and laborious way to build this piece if the weight of the 
tube had a tolerance of more than double the minimum weight and thickness?

Mark Langford
ML at N56ML.com
website at http://www.N56ML.com
 


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KR> Lay-up

[Phillip E. Harrison]

Larry,
Thank you for your advice. I guess I'm a tinkerer like probably
anyone who sets off to build ...well...anything. And yeah your right it
looks like the original design produced a fine airframe. Why change it?


-Original Message-
From: krnet-bounces+mistion=earthlink@mylist.net
[mailto:krnet-bounces+mistion=earthlink@mylist.net] On Behalf Of
Larry Flesner
Sent: Friday, February 04, 2011 6:13 PM
To: pharri...@penumbradesign.net; KRnet
Subject: RE: KR> Lay-up

At 03:09 PM 2/4/2011, you wrote:
> >>I bought a KR2 kit and plan to use an epoxy with a 4.8 oz BID CF/Aramid.
>Maybe I'm wrong. But this seems like a pretty good idea. <<
+++

Why not just use the "KR cloth" from Wick's?  It has to be less 
expensive than CF and is plenty strong for the job as evidenced by 
the many KR's flying, like mine with 400+ hours.  It doesn't need to 
be made any stronger and won't be a great deal heavier than using 
CF.  No point in trying to re-invent the wheel.

Larry Flesner


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KR> Lay-up

[Phillip E. Harrison]

Thanks for the advice

-Original Message-
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf
Of Mark Langford
Sent: Friday, February 04, 2011 6:28 PM
To: pharri...@penumbradesign.net; KRnet
Subject: Re: KR> Lay-up

Phillip Harrison wrote:

I' planning on a veil did you use one?

No, if you mean did I use a Kevlar veil.  That one thread was more Kevlar 
than I needed or wanted on the plane.

What you may be missing is that the real structure of a KR wing is the wood 
spar underneath the skin.  The skin's not going to fail unless you strike it

with something, and if they are carbon fiber you'll break out a chunk and 
either continue your crash or keep on going (if it was a Canadian goose). 
The only reason I used carbon fiber on my wings was because I could make the

wing a little lighter, yet much stronger (to minimize hangar rash and 
survive the inevitable runway light collision), and I could afford the extra

cost (back when CF was "cheap").

You asked for advice, and I guess that's mine.  You are welcome to use 
Kevlar and extol it's virtues after you're done.

This reminds me of a conversation I had with the chief engineer this 
afternoon.  He wanted some advice on cutting  cost out of a 10" diameter 
carbon fiber tube for a piece of space hardware that we were asked to quote 
to build.  Unidirectional prepreg CF tape .0002" thick was specified by the 
customer, which cost $700/lb, with a 25 pound minimum order. Wall thickness 
was called out as .040" to .090", so it was going to take something like 200

layers of this stuff wound around the tube to get to minimum thickness.  It 
took me about 2 seconds to bust out laughing...why would anybody specify the

most expensive and laborious way to build this piece if the weight of the 
tube had a tolerance of more than double the minimum weight and thickness?

Mark Langford
ML at N56ML.com
website at http://www.N56ML.com
 


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KR> Lay-up

[Phillip E. Harrison]

I' planning on a veil did you use one?

-Original Message-
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf
Of Mark Langford
Sent: Friday, February 04, 2011 4:06 PM
To: pharri...@penumbradesign.net; KRnet
Subject: Re: KR> Lay-up

Phillip Harrison wrote:

>>I bought a KR2 kit and plan to use an epoxy with a 4.8 oz BID CF/Aramid.
Maybe I'm wrong. But this seems like a pretty good idea. <<

I'm guessing you've never actually used Kevlar.  The stuff is very diffiult 
to cut, but the killer is that it's virtually impossible to sand.  It just 
frizzes up and creates a fuzz on the surface every time you sand through to 
a stray strand.  You spend all your time trying to hide it again, only to 
sand into it again and again.   I used carbon fiber with a single Kevlar 
tracer, and that one simple thread still gives me a very bad taste for the 
stuff...

Mark Langford
ML at N56ML.com
website www.n56ml.com


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KR> Lay-up

[Phillip E. Harrison]

I bought a KR2 kit and plan to use an epoxy with a 4.8 oz BID CF/Aramid.
Maybe I'm wrong. But this seems like a pretty good idea. From what I
understand either a CF/epoxy or Kevlar are both "stronger" than the original
Dynel/VE layup. That CF is both more rigid and has a much higher yield but
when it goes it is a "Catastrophic failure". With the Kevlar its weak points
seems to be no actual penetration of resin into the fibers resulting in poor
compression capacity. What seems to be a benefit to how Kevlar/epoxy is that
it fails in a similar way as aluminum and is somewhat isotropic and not a
sudden.

So around and around I go. Anyone wanting to chime in on this?
Phillip



-Original Message-
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf
Of Russ Sing
Sent: Friday, February 04, 2011 10:28 AM
To: mylittle...@yahoo.com; KRnet
Subject: Re: KR> KR2 For sale

My phone number is 573-253-4501 
I am located in Mexico, MO 
 
Thanks,
Russ




From: "mylittle...@yahoo.com" 
To: KRnet 
Sent: Fri, February 4, 2011 9:20:42 AM
Subject: Re: KR> KR2 For sale

Russ how do I get a hold of you about the KR and where are you located?

Thanks
Richard
937-243-7303

Sent from my Verizon Wireless BlackBerry

-Original Message-
From: Russ Sing 
Sender: krnet-boun...@mylist.net
List-Post: krnet@list.krnet.org
Date: Fri, 4 Feb 2011 07:04:22 
To: KRnet
Reply-To: KRnet 
Subject: KR> KR2 For sale

Hello all,  I hate to but have to sale my KR2.  I just got it about a month
ago 
and started sanding on it in my basement garage and realized thats not the
place 

for me to work on it due to my son having bad allergies and asthma.  I have
no 
other place to work on it so I am have to sale it.  I am asking $2500 for
it.  I 

will get some photos on here when I get to my personal computer.  


It is mostly built.  I have two VW engine blocks with it.  

Thanks,
 
Russ


      
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KR> Flaps Effectiveness?

[Phillip E Harrison]

This is my first entry into discussion here. I have a KR2 kit (thanks Steve)
and have been looking to see what mods I would consider with both the
Airframe and Corvair engine.
For me two things are fundamental and control the decision
process.1-the rule of KISS and 2-an inclination towards maximum flexibility
and control. So for me it comes down to - is it safe, simple and useful in
that order. 
Any design change that increases safety, controllability and use of
is within pilot capability is a good choice to me.

-Original Message-
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf
Of Mark Langford
Sent: Friday, August 20, 2010 10:44 PM
To: KRnet
Subject: Re: KR> Flaps Effectiveness?

Scott Black wrote:

> The other advantage to flaps on many tailwheel airplanes is that it allows
> the airplane to actually stall in the 3 pt attitude.

Excellent point, and I've had to relearn how to land my plane since I 
doubled my flap deflection angle.  Just ask Jeff Lange, who was onboard for 
my third landing since that mod!  Despite those screwups, I now grease a lot

more landings, and it's funny how what used to be minimum speed has now 
become "too hot".  That reminds me that speed control is everything in the 
world of landing KRs.  Trying to force it down on a short runway is never a 
good idea, but when you arrive at the right speed, you're done flying and 
it's a total non-event.  Folks who are considering flying into a short 
"one-way" field with trees on the far end are advised that landing distance 
is easily double or triple the takeoff distance.  On a short sod strip with 
obstacles on the far end, a go-around may not be an option at all.  I spent 
three months on a long runway perfecting landings before I got up the nerve 
to fly into my short field, and even then I almost had to ground loop it on 
the first landing.  I'm substantially better than that now, but that's only 
after over 2000 landings on my plane.  And I have huge flaps!

Late today was super smooth, so I took the opportunity to do a wide open 
flyby at about 220 mph about 20' off the runway.  What a blast...

Mark Langford
N56ML "at" hiwaay.net
website at http://www.N56ML.com
 


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KR> hats off to Mark Langford

[Phillip E Harrison]

DITTO, Applaud-Yeah
Phillip

-Original Message-
From: krnet-bounces+mistion=earthlink@mylist.net
[mailto:krnet-bounces+mistion=earthlink@mylist.net] On Behalf Of Oscar
Zuniga
Sent: Monday, July 26, 2010 10:05 PM
To: kr...@mylist.net; corvaircr...@mylist.net
Subject: KR> hats off to Mark Langford


Five-Six-Mike-Lima, you had the guts to enter the Airventure Cup and the
airplane and stamina to finish the race.  Congratulations!

Bitte, ein Bit-!

Oscar Zuniga
Air Camper NX41CC
San Antonio, TX
mailto: taildr...@hotmail.com
website at http://www.flysquirrel.net



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KR> KR-2 project CHEAP!!! Must be picked up in the next 7 days.

[Phillip E Harrison]

Steve I am purchasing the KR2 from Janie and need to know a few
things. Have you seen it? It sounds like an un-finished project how far
along was it if it was
I have asked the typical questions of Janie but I do not know how
familiar she is with the kit. I'm arranging to have the cash dropped off and
the kit picked up ASAP. Anything you could do to help me know what I'm
getting into would be great.

Here is a little on what I do and this would be used to further another
educational program.

Here is a pervious project http://penumbradesign.net/mistion/ let me know
what you think.

Phillip E. Harrison

-Original Message-
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf
Of Plane Nut
Sent: Friday, July 23, 2010 2:43 AM
To: 'KRnet'
Subject: KR> KR-2 project CHEAP!!! Must be picked up in the next 7 days.

Hi Netter's,



There is a KR-2 project in Martinez California that appears to be a great
deal for someone wanting to build a KR without a lot of cash.  A builder's
widow has to move by the end of the month and cannot take the project.  I
wanted to pick it up but am unable due to preparing to leave for OSH.  They
bought the complete kit from RR for roughly $9k and includes most everything
and then some.  It has new tires and wheels with matco hydraulic brakes and
the later model fixed aluminum spring gear (not installed).  The boat and
spars appear to be completed.  The canopy is there.  This is a steal.  The
price.a grand total of only $800 and you pick up a great project.  If you
are interested please contact Emma Green direct, and PLEASE do not commit to
buying the project from her if you cannot perform before the end of next
week (7/31/2010).



On a side note, we will be at OSH next to Flycorvair.com (William Wynne) at
spaces #644/645.  Come by and see us.  We are pondering what show specials
we can offer but you will have to come by to find out.  Also, we are now
officially a Dynon dealer!  If you are thinking of purchasing any of the
Dynon products, we can get them for you and you will be helping us keep the
KR parts and manufacturing alive.  



If you had been to our website in the past couple weeks and saw it wasn't
there, that is because we changed hosting services due several issues we had
with Intuit.  With the new hosting service we also have a new look to our
website.  It is much easier to use and the e-commerce is significantly
improved.  Stop by and check it out.



Regards,



Steve Glover



www.nvaero.com

steve.glo...@nvaero.com

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