KR> Purchased a KR-2, want to change the landing gear config....

[Tony King]

" simply 'flipping around' the main gear so that it angles backwards and is
mounted to the back of the spar, and then adding a nose wheel "

Sounds easy doesn't it?  That is how you create a tri-gear KR2, although my
understanding is that sentence probably covers a couple hundred hours
of work.

Welcome to the group.  I'm sure you'll find lots of help here as you
progress through your conversion.

Cheers,

Tony King
Queensland Australia

KR> Purchased a KR-2, want to change the landing gear config....

[Dave Acklam]

New poster here...

I recently purchased a completed KR-2 (N86DK, S/N 4336), fixed conventional
gear & some form of VW motor, posa carb... There appears to be minor glass
repair needed on the elevator (I was an airframe mechanic in the Army, so
that's no big deal to me), and it's short a few instruments, but the biggest
concern for me is the landing gear...

I want to convert it to tri-gear, as all my time has been in 172s & I'm not
quite comfortable picking up a new airframe and learning to fly tailwheel at
the same time.

I know that some aircraft can be converted by simply 'flipping around' the
main gear so that it angles backwards and is mounted to the back of the
spar, and then adding a nose wheel - is this a workable concept with the KR
(keep the stock mains but flip/reverse-mount, and add the Diehl nosewheel),
or do I need to buy new mains as well?

P.S. If anyone knows anything about this aircraft's history, let me know
off-line...

KR> using a loop antenna for VHF comms

[Glenn Martin]

I would be more likely to use a folded dipole. Same noise reduction, 
same radiation pattern as a dipole (loops are meant for direction 
finding), but it does require a 6:1 balun for impedance matching.(easily 
purchased or made).

in,
-- 
Glenn Martin,
KR2 N1333A,
Biloxi, MS

KR> comm antenna 1/4 wave length

[Gary Robison]

Pete I have always used 2808/freq. in MHz = 1/4 wave in inches

Gary


Life isn't about waiting for the storm to pass. It's about learning to dance 
in the rain


- Original Message - 
From: "Pete Klapp" 
To: 
>
> Mark /Netters
>
> On your web site, you list the length of each leg of your dipole at 20.3". 
> I went to an online site that will calculate the needed length ,
> www.onlineconversion.com/frequency_wavelength.htm. 

KR> Prop , pitch, perfomance

[Mark Langford]

Jeff York wrote:

>Can I open a possible can of worms and discuss or find that prop 
>performance spreadsheet that I seem to remember back some time ago.<

See http://www.krnet.org/kr-info.xls for the spreadsheet, and 
http://www.krnet.org/kr-info.html for an HTML version for those who don't 
have Excel.  Speaking of this spreadsheet, it's probably been a year since 
I've asked for updates.  There are some new planes flying, and I'm sure some 
folks have refined their numbers, so please feel free to email changes to me 
so I can update it.  The easiest way is to copy the spreadsheet, modify or 
add your line, and then delete the rest and send it back to me, but just 
writing it out works also.  In a week or two I'll consolidate the new 
additions and post a new version of the list.

Thanks,

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

KR> using a loop antenna for VHF comms

[Craig Williams]

This is the antenna I am building:

http://www.davemorris.com/dave/MorrisDFLoop.html



"it occurred to the author that
a full wavelength loop antenna would fit perfectly inside a
Dragonfly, Q-2, or other aircraft having a non-metal tail
cone of approximately 31 inches diameter, and that such an
antenna could provide all the advantages for which loop
antennas are well known."

Interesting read and a better antenna that can be removed and repaired easily 
if needed.

Craig
www.kr2seafury.com

KR> Type 4 cooler on Type 1 2180

[Jeff Scott]

12 years ago I put a type 4 oil cooler on a 2180 VW I had mounted in an Avid 
Flyer that I built. I had used an adapter plate to turn the cooler around to 
center it on the engine. If I remember right, I needed longer studs for the 
cooler, but otherwise it mounted up just fine. It worked well. No oil temp 
problems. However, I never tried the Type 1 cooler first, so can't draw a 
comparison for you.

 Jeff Scott
 Los Alamos, NM

- Original Message -
From: jeffyor...@yahoo.com
Subject: KR> Type 4 cooler on Type 1 2180

 I am thinking of going to a Type 4 oil cooler on my type 1 VW 2180. According 
to the man who would know, SB. I can increase cooling 20%. Just curious if 
anyone here as bolted one up and how there experience was as I plan to order 
one as soon as Steve gets back to shop. I guess I am wondering about dimensions 
of Type 4 cooler vs Type 1 mostly. Jeff York

KR> Prop , pitch, perfomance

[Jeff Scott]

See 

- Original Message -
From: jeffyor...@yahoo.com
Sent: 10/20/11 04:01 PM
To: KRnet
Subject: KR> Prop , pitch, perfomance

 I am most interested in standard KR2 with a 2180 but for comparative purposes 
as long as I can compare like data on like simular KR aircraft I will be fine.

KR> Type 4 cooler on Type 1 2180

[jeffyor...@yahoo.com]

I am thinking of going to a Type 4 oil cooler on my type 1 VW 2180.

According to the man who would know, SB. I can increase cooling 20%. Just 
curious if anyone here as bolted one up and how there experience was as I plan 
to order one as soon as Steve gets back to shop. 

I guess I am wondering about dimensions of Type 4 cooler vs Type 1 mostly.

Jeff York
KR_2
Georgetown Scott County FAA airport of the year
2010 KR Nationals Peoples Choice, Best Interior
2011 Air Fest Best Experimental, Best Insturment Panel

Sent from my HTC smartphone on the Now Network from Sprint!

KR> Prop , pitch, perfomance

[jeffyor...@yahoo.com]

Can I open a possible can of worms and discuss or find that prop performance 
spreadsheet that I seem to remember back some time ago.

I am most interested in standard KR2 with a 2180 but for comparative purposes 
as long as I can compare like data on like simular KR aircraft I will be fine.

Just an exercise to see if I might want to consider a different prop to gain 
speed vs climb performance. Sorry I dont have my prop numbers handy at the 
moment for mine but I can say that static on a reasonably not to hot day I can 
turn 3400. 

Flying is about speed and I just want more. 

Jeff York
KR_2
Georgetown Scott County Airport, FAA airport of the year
2010 KR Nationals Peoples Choice and Best Interior
2011 Air Fest Best Experimental , Best Insturment Panel

Sent from my HTC smartphone on the Now Network from Sprint!

KR> comm antenna 1/4 wave length

[Virgil N. Salisbury]

Velocity Factor ? Virg


On 10/20/2011 4:18 PM, Pete Klapp wrote:
>
>
> Mark /Netters
>
> On your web site, you list the length of each leg of your dipole at 20.3". I 
> went to an online site that will calculate the needed length ,
> www.onlineconversion.com/frequency_wavelength.htm. Their conversion formula 
> gives a length range of 25.0" at 118 MHz to 22.0" at 134 MHz. The range of 
> frequencies in the Cleveland-Akron-Canton area run from 118 to 135 MHz. An 
> average / mid range would be about 126 MHz which would be a 1/4 wavelength 
> antenna of 23.4inches. How did you arrive at 20.3"? Did I make a mistake 
> somewhere?
>
> Has anyone else used another method or published table to get the antenna 
> length?
>
> Any info greatly appreciated.
>
> Thanks in advance,
>
> Pete Klapp, building KR-2S N729PK'
> Canton, OH
> ___
> Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp
> 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> comm antenna 1/4 wave length

[Virgil N. Salisbury]

Velocity Factor ? Virg


On 10/20/2011 4:18 PM, Pete Klapp wrote:
>
>
> Mark /Netters
>
> On your web site, you list the length of each leg of your dipole at 20.3". I 
> went to an online site that will calculate the needed length ,
> www.onlineconversion.com/frequency_wavelength.htm. Their conversion formula 
> gives a length range of 25.0" at 118 MHz to 22.0" at 134 MHz. The range of 
> frequencies in the Cleveland-Akron-Canton area run from 118 to 135 MHz. An 
> average / mid range would be about 126 MHz which would be a 1/4 wavelength 
> antenna of 23.4inches. How did you arrive at 20.3"? Did I make a mistake 
> somewhere?
>
> Has anyone else used another method or published table to get the antenna 
> length?
>
> Any info greatly appreciated.
>
> Thanks in advance,
>
> Pete Klapp, building KR-2S N729PK'
> Canton, OH
> ___
> Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp
> 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> comm antenna 1/4 wave length

[Glenn Martin]

Mark. I hope you don't mind me jumping in on this...
The reason the antenna is shorter is because the formula you have seen 
is for the wavelength of a signal in FREE SPACE, which travels at the 
speed of light. In a conductor, the signal travels at a fraction  of the 
speed of light (read on VELOCITY FACTOR). Thus the wavelength is SHORTER 
in a conductor than in free space, and the antenna is cut accordingly.


-- 
Glenn Martin,
Kr2 N1333A

KR> comm antenna 1/4 wave length

[Pete Klapp]

Mark /Netters

On your web site, you list the length of each leg of your dipole at 20.3". I 
went to an online site that will calculate the needed length ,
www.onlineconversion.com/frequency_wavelength.htm. Their conversion formula 
gives a length range of 25.0" at 118 MHz to 22.0" at 134 MHz. The range of 
frequencies in the Cleveland-Akron-Canton area run from 118 to 135 MHz. An 
average / mid range would be about 126 MHz which would be a 1/4 wavelength 
antenna of 23.4inches. How did you arrive at 20.3"? Did I make a mistake 
somewhere?

Has anyone else used another method or published table to get the antenna 
length?

Any info greatly appreciated.

Thanks in advance,

Pete Klapp, building KR-2S N729PK'
Canton, OH

KR> Tip tanks

[Fred Johnson]

Mike wrote:



"Outboard tanks, tips or not, increase the structural ability of the wing
to handle sudden increases in lift.  Tip tanks, if canted like the later
310's for instance, are thought to decrease tip drag.   

The KR wing is strong enough that carrying fuel in the tips isn't
relevant for strength issues, to my mind.  And disturbing the tip vortice
is more easily done than by building a fake tank.  

If someone wants to do it though, why not?  Potential imbalance issues
can be provided for easily.[Fred Johnson] "  

I agree, if it is purely to reduce tip vortices, the Hoerner wing tips or
some sort of winglet would be a better choice, but if one wanted to add fuel
capacity, I would think they are an attractive addition.

Fred Johnson
Reno, NV

KR> POT OHM OR K?

[Glenn Martin]

On 10/20/2011 5:46 AM, John Martindale wrote:
> Well actually Jeff, the current in the circuit stays the same. Refer
>
John. You are incorrect in this situation. Adding the resistance of the 
rheostat (as we increase the dimming effect) increases total circuit 
impedance. ALTHOUGH this is accompanied by a SLIGHT decrease in 
resistance of the lamps (due to the lamps having a  positive temperature 
coefficient of resistance) this effect is STILL not enough  to be 
considered of any consequence in this application. THUS, since the 
dimmer's resistance ADDS to the resistance of the lamps (which for all 
practical purposes has not changed) TOTAL circuit resistance INCREASES. 
Since the applied voltage remained the same (12V) and Total Resistance 
INCREASED, Total circuit current decreased as a result, and power  
decreased. The converse is true as we increase brightness.



-- 
Glenn Martin

KR> POT OHM OR K?

[John Martindale]

Well actually Jeff, the current in the circuit stays the same. Refer

http://www.allaboutcircuits.com/vol_1/chpt_5/2.html

The brightness is a function of power (watts) which equals volts times amps.
Since amps remain the same, a resistor/rheostat drops the voltage across the
bulb thus dimming it. The associated voltage drop across the resistor times
the amps equals the watts that the resistor must give off as heat. The sum
of the voltage drops must equal the voltage of the battery (12volts).

In summary, electrons out of a battery terminal equals electrons in at the
other. Those little fizzers have to go somewhere :-).

John Martindale
29 Jane Circuit
Toormina NSW 2452
Australia

ph:61 2 6658 4767
m:0403 432179
email:john_martind...@bigpond.com

-Original Message-
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf
Of Jeff York
Sent: Wednesday, 19 October 2011 2:46 AM
To: KRnet
Subject: Re: KR> POT OHM OR K?

Ok, It has been a long time since I was in Electrical Engineering 101.
.snip