KR> KRnet Digest, Vol 1, Issue 152

2013-08-16 Thread Alan Middleton 
Hello all,


I have recently joined this august group due to my purchase of a KR2 (frame # 
2001).  I have fitted a new motor (Jabiru 2200 85hp), repaired and tweaked the 
overall airframe to ensure it is airworthy.  I have now flown it for 7.5hrs and 
have decided the aircraft has many characteristics of a WW2 fighter (ex RAAF 
FLTLT).  


Therefore, and to the delight of all the kids that see it, I have painted it in 
the colours of a P51 Mustang!!  


The colours will be familiar to Mustang enthusiasts as the colour scheme of the 
47th Fighter Squadron, 15th Fighter Group, VIIth Fighter Command, 20th U.S. 
Army Air Force South Field, Iwo Jima, Kazan Islands, Japan, dated 1945.


I wonder if anyone could help me with a few questions I have:


1. What is the preferred CG range for KR2's?

2. What are the frame 'G' limits?

3. What have people found is a successful tail wheel fit out as an alternative 
to the standard system.  The aircraft is fun to fly in every respect EXCEPT the 
landing roll, especially in a crosswind.  I have fitted a Matso 6" as seen in 
the photo, but have not yet had a chance to test fly it.  As soon as I do, I 
will report back to the group.


P.S.  The aircraft in the back ground is a beautifully restored Tiger Moth 
owned by Graeme Atchinson, a local flying identity here in Townsville.  I fly 
the Tiger regularly and can say it is a stable kitten in the ground compared to 
the KR2!!


Thank you all for a marvellous network.


Regards, Alan


Alan Middleton

Bluewater Airport

Townsville, Australia

+61407356948 

On Aug 16, 2013, at 04:23 AM, smwood  wrote:






Joe,
 The main wheels have to be far enough aft so that the tail does not hit the 
 ground every time some one gets in or out of the airplane. You don't know 
 what the CG is until the airplane is completed. If the wheels are too far 
 aft, then will not have enough low speed elevator authority to rotate for 
 take off and for landing; not a problem for KR aircraft.
 I should have put my main wheels about 2 inches further aft to preclude 
 dumping the tail with a passenger on board and me trying to climb in or out. 
 (Been there, done that.)

 Sid Wood
 Tri-gear KR-2 N6242
 Mechanicsville, MD, USA



Can someone tell me the angle of the main gear legs for a tricycle landing

gear , the swept back angle from the spar? I mounted my gear legs and they

seem to be angled further aft than what I've seen on other KR's.I haven't

measured the distance from the aft side of main spar but I would say 8 to

9 " to the center of the leg where the wheel axle will mount. What is the

envelope for either landing gear configuration forward or aft of the C of

G plus 5" minus 10"?


Joe Cruz

Spencer,NY


End of KRnet Digest, Vol 1, Issue 152

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KR> KRnet Digest, Vol 1, Issue 152

2013-08-15 Thread smwood 
Joe,
The main wheels have to be far enough aft so that the tail does not hit the 
ground every time some one gets in or out of the airplane.  You don't know 
what the CG is until the airplane is completed.  If the wheels are too far 
aft, then will not have enough low speed elevator authority to rotate for 
take off and for landing; not a problem for KR aircraft.
I should have put my main wheels about 2 inches further aft to preclude 
dumping the tail with a passenger on board and me trying to climb in or out. 
(Been there, done that.)

Sid Wood
Tri-gear KR-2 N6242
Mechanicsville, MD, USA


> Can someone tell me the angle of the main gear legs for a tricycle landing 
> gear , the swept back angle from the spar? I mounted my gear legs and they 
> seem to be angled further aft than what I've seen on other KR's.I haven't 
> measured the distance from the aft side of main spar but I would  say 8 to 
> 9 " to the center of the leg where the wheel axle will mount. What is the 
> envelope for either landing gear configuration forward or aft of the C of 
> G plus 5" minus 10"?
>
> Joe Cruz
> Spencer,NY
>
> End of KRnet Digest, Vol 1, Issue 152
> *
>

KR> KRnet Digest, Vol 1, Issue 152

2013-08-15 Thread jon kimmel 
You may not know what the cg of the basic aircraft is until it is finished,
but you should know the aft cg limit before it is finished.  The plans for
the kr2 state it is 35% mac...of course mac will vary for a kr2s or if you
change the planform in any other way.

As long as the wheels are aft of the aft limit you shouldn't set it on the
tail.

https://sites.google.com/site/mykr2stretch/
https://sites.google.com/site/mykr2stretch/parts-for-sale
On Aug 15, 2013 1:23 PM, "smwood"  wrote:

> Joe,
> The main wheels have to be far enough aft so that the tail does not hit
> the ground every time some one gets in or out of the airplane.  You don't
> know what the CG is until the airplane is completed.  If the wheels are too
> far aft, then will not have enough low speed elevator authority to rotate
> for take off and for landing; not a problem for KR aircraft.
> I should have put my main wheels about 2 inches further aft to preclude
> dumping the tail with a passenger on board and me trying to climb in or
> out. (Been there, done that.)
>
> Sid Wood
> Tri-gear KR-2 N6242
> Mechanicsville, MD, USA
>
>
>  Can someone tell me the angle of the main gear legs for a tricycle
>> landing gear , the swept back angle from the spar? I mounted my gear legs
>> and they seem to be angled further aft than what I've seen on other KR's.I
>> haven't measured the distance from the aft side of main spar but I would
>>  say 8 to 9 " to the center of the leg where the wheel axle will mount.
>> What is the envelope for either landing gear configuration forward or aft
>> of the C of G plus 5" minus 10"?
>>
>> Joe Cruz
>> Spencer,NY
>>
>> End of KRnet Digest, Vol 1, Issue 152
>> ***
>>
>>
>
>
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