KR> Solid wings

[Colin Rainey]

Mark L took some time and figured some stuff up related directly to that
idea of a continuous wing spar, having the diehedral come into the fuse.
Check his website for it, if not he will probably comment again about what
his take is on how it should be done to be successful.

I know you are uncomfortable about the WAFs. How ever NONE have ever failed
in flight. If someone else has new info I stand corrected, but from all that
I have read the only KR's that have hit the ground have been due to pilot
error, with the exception of some engine failures. I have never heard of a
structural failure of a KR yet

Colin Rainey
brokerpi...@bellsouth.net

KR> Solid wings

[StRaNgEdAyS]

Dihedral can be built into the spars in a manner similar to that use by
Jodel builders. 
http://www.jodel.com/index.asp?p=withy
The Jodel Spars are somewhat wider than the KR's but the method of
construction is similar, and I believe that there is an approved
modification to the Jodel Spar to make it in a similar fashion to that of
the KR. Anyway, if you look at the spar pics toward the bottom of the page
you can see the way the spar caps have been scarfed to produce the angle.
This smae method could conceivably be used to build in the dihedral on a one
piece spar. 
The problems with a one piece spar for the homebuilder would be one of room.
you will have a great deal of difficulty constructing the wings in a typical
home setting, forcing the builder to seek a hangar earlier to finish
construction. 
Peter Bancks
Ballina 
Australia

KR> Solid wings

[Allen Wiesner]

Well, how about L/R wing panels joined at the centerline and with the 
dihedral built into the joint?
In any case, Lynn Hyder's KR-1 1/2 has a solid one-piece wing; see: 
http://home.hiwaay.net/~langford/lhyder/

Allen G. Wiesner  KR-2SS/TD S/N 1118
65 Franklin Street
Ansonia, CT  06401-1240

(203) 732-0508

flash...@usadatanet.net 

KR> Solid wings

[Ron Butterfield]

On 9/20/06, Allen Wiesner  wrote:
> Well, how about L/R wing panels joined at the centerline and with the
> dihedral built into the joint?

The problem with that is, as the center section is reduced, the outer
sections have to be made larger to provide the same wing area.

For example, on the KR2S:
wing center section 30 sf
outer wings 52 sf
63% of plane's weight supported on waf's

change center section to 36" span (round numbers to match fuselage)
wing center section 12 sf
outer wings 70 sf
85% of plane's weight now supported on waf's

This doesn't mean that it _can't_ be done, just that there are now
larger forces on the WAF's and the wood they attach to, and you must
re-do all the engineering and calculations to make sure things will
still work.

A possible exception would be to put the KR2-S outer wings on the
reduced center section of a KR-1.  This would give you very close to
the original wing area of the KR-1, and less stress on the WAF's due
to the lower gross weight.

-- 
Regards,
RonB

KR> Solid wings

[Mark Langford]

Ron Butterfield wrote:

> The problem with that is, as the center section is reduced, the outer
> sections have to be made larger to provide the same wing area.

I don't think anybody's talking about reducing wing area, just getting rid 
of the WAFs and moving the dihedral bend from the WAF point to the fuselage 
wall, that's all.  No other real changes.  Of course that's easy to say, but 
the rear WAF gets a little tricky, because it also has to bend forward to 
taper the wing.  Robert Pesak just finished doing that with his wings, and 
has the details on his website at http://rkpsk.com/ .  He's doing some 
excellent work...

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

KR> Solid wings

[Ron Freiberger]

I repaired a Jodel D11 with a one piece wing, and it was a real pain in
the catooch.  Why does everyone write about WAFs as if they are a
problem?  There's no evidence to support an issue.
It's handy to have the center section/gear/fuselage as a one piece
roll-around.

Ron Freiberger

mail to ronandmar...@earthlink.net

KR> Solid wings

[Larry H.]

Some of you may remember Dennis Pointers slick KR2. I trailered it to Oshkosh 
behind my motorhome that I had at that time for him to put on display. I was 
sure glad that the wings would come off of it. Some of you have taken the wings 
off of your KR2s and taken them home for repairs before, I bet you were glad 
the WAFS were there or at least that the wings would come off easily.
  I plan on traveling a lot one of these days and may want to carry my airplane 
with me in a Toy Hauler camping trailer for example. My wife is a school 
teacher and we have spent up to 6 weeks at a time on the Texas coast in summers 
past. It would have been nice to have had a KR2 with me during those times to 
fly and look around or come back to my office when I was needed rather than 
drive 7 or 8 hours.
  I like the idea of wings being able to come off easily, just in case a guy 
has a problem somewhere and needs to transport the airplane. If a guy got stuck 
in weather somewhere (like the upcoming gathering)and really had to get home, 
it is not inconceiveable that he could rent a U Haul truck and take his plane 
and himself home in an emergency. Depending on how far from home he is it may 
be less expensive to do this than buy an airline ticket two ways plus storage 
of the airplane until he came back for it.
  I think Bob P was talking about making his spars extend into the fuselage 
overlapping one another like the RV series of airplanes do as does most 
gliders. This way no WAFs are necessary at the fuselage walls. I think some 
gliders have a box structure built in which is basically a center section spar. 
The two wing spars slide inside of this box and one or more quick release pins 
pass through all webs to hold in place. 
  Larry H.

Ron Freiberger  wrote:
  . Why does everyone write about WAFs as if they are a
problem? There's no evidence to support an issue.
It's handy to have the center section/gear/fuselage as a one piece
roll-around.

KR> Solid wings

[bearlk...@aol.com]

Larry is right on two counts. First that removable wings are a homebuilt 
must, and second that I am looking at wings that are removable at the root like 
my 
AA1. The gear must stay with the fuse for obvious reasons, but be bolted to 
the spar for strength. I will look with interest at the  solid wings described 
in other posts in this thread. Please do not thimk that I am bashing WAFs, 
they are a tested and solid solution to a basic homebuilder's problem-moving a 
project aircraft. I am just a guy who has been both congratulated and flamed 
for 
thinking outside the box. Thanks for your thoughtful replies, it's amazing 
how many angles can be covered by a group of smart thinkers. It helps that I am 
at least a year from building spars.
Bob Polgreen
boat and parts
Nowthem MN 

KR> Solid wings

[Steve Bray]

Soneria's are built exactly that way.

Steve Bray
Jackson, Tennessee




>From: "Larry H." <lah...@yahoo.com>
>Reply-To: KRnet <kr...@mylist.net>
>To: KRnet <kr...@mylist.net>
>Subject: RE: KR> Solid wings
>Date: Wed, 20 Sep 2006 12:14:54 -0700 (PDT)
>
>Some of you may remember Dennis Pointers slick KR2. I trailered it to 
>Oshkosh behind my motorhome that I had at that time for him to put on 
>display. I was sure glad that the wings would come off of it. Some of you 
>have taken the wings off of your KR2s and taken them home for repairs 
>before, I bet you were glad the WAFS were there or at least that the wings 
>would come off easily.
>   I plan on traveling a lot one of these days and may want to carry my 
>airplane with me in a Toy Hauler camping trailer for example. My wife is a 
>school teacher and we have spent up to 6 weeks at a time on the Texas coast 
>in summers past. It would have been nice to have had a KR2 with me during 
>those times to fly and look around or come back to my office when I was 
>needed rather than drive 7 or 8 hours.
>   I like the idea of wings being able to come off easily, just in case a 
>guy has a problem somewhere and needs to transport the airplane. If a guy 
>got stuck in weather somewhere (like the upcoming gathering)and really had 
>to get home, it is not inconceiveable that he could rent a U Haul truck and 
>take his plane and himself home in an emergency. Depending on how far from 
>home he is it may be less expensive to do this than buy an airline ticket 
>two ways plus storage of the airplane until he came back for it.
>   I think Bob P was talking about making his spars extend into the 
>fuselage overlapping one another like the RV series of airplanes do as does 
>most gliders. This way no WAFs are necessary at the fuselage walls. I think 
>some gliders have a box structure built in which is basically a center 
>section spar. The two wing spars slide inside of this box and one or more 
>quick release pins pass through all webs to hold in place.
>   Larry H.
>
>Ron Freiberger <ronandmar...@earthlink.net> wrote:
>   . Why does everyone write about WAFs as if they are a
>problem? There's no evidence to support an issue.
>It's handy to have the center section/gear/fuselage as a one piece
>roll-around.
>
>
>
>___
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