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Mk 3 steel main gear legs
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jindoguy(at)gmail.com
Guest

Posted: Sat Jan 27, 2007 8:44 am Post subject: Mk 3 steel main gear legs

When I was in the midst of main gear straightening caused by my horrible landing technique, I thought the way out was TNK's steel gear legs. Now that I am pretty happy with my landings, I know I'm not going to install them. $350 for the pair, plus shipping. 



Rick

-- 

Rick Girard

"Ya'll drop on in"

takes on a whole new meaning

when you live at the airport.  [quote][b]

boyter(at)mcsi.net
Guest

Posted: Sat Jan 27, 2007 10:24 am Post subject: Mk 3 steel main gear legs

Are the new steel gear leg from kolb still have the  wrong bend at the axle? all the old ones about two years ago, camber was way off  when the weight was on the wheels.

  

 Wayne

 Kolb mark 3

 582 three blade wrap drive

 450 hrs.

 [quote]   ---

jindoguy(at)gmail.com
Guest

Posted: Sat Jan 27, 2007 11:31 am Post subject: Mk 3 steel main gear legs

I bought them in April or May of 2006 so I doubt they are in that lot.



Rick



On 1/27/07, Wayne Boyter <boyter(at)mcsi.net  (boyter(at)mcsi.net)> wrote:[quote]       Are the new steel gear leg from kolb still have the  wrong bend at the axle? all the old ones about two years ago, camber was way off  when the weight was on the wheels.

  

 Wayne

 Kolb mark 3

 582 three blade wrap drive

 450 hrs.

 [quote]   ---

John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Sat Jan 27, 2007 12:40 pm Post subject: Mk 3 steel main gear legs

I know I'm not going to install them.

| $350 for the pair, plus shipping.

| 

| Rick

 

Rick:



If you keep on flying, eventually you will need them.



Old hauck's holler proverb.  



john h

mkIII

hauck's holler, alabama

_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

APilot(at)webtv.net
Guest

Posted: Sat Jan 27, 2007 5:03 pm Post subject: Mk 3 steel main gear legs

Tap Plastics sells a 1" dia "S" glass fiberglass rod that is 6 feet long

for $30.  That would make two gear legs if a 3/16 thick sleeve could be

found to reduce the dia of the fuselage sleeve on a Mark III.  Has

anyone tried them for a gear leg replacement?  My guess is that they

might be too flexible.   Vic in Sacramento

rowedenny(at)windstream.n
Guest

Posted: Sat Jan 27, 2007 9:59 pm Post subject: Mk 3 steel main gear legs

---

jindoguy(at)gmail.com
Guest

Posted: Sun Jan 28, 2007 6:49 am Post subject: Mk 3 steel main gear legs

Interesting idea to use the S glass rod. The Varieze, LongEZ and all their progeny use S glass main and nose ear. Should anyone try this idea, be sure to wrap the leg with E glass laid up at a 45 degree bias. This keeps the S glass rod from splintering or delaminating when bent. 



Rick



On 1/27/07, Denny Rowe <rowedenny(at)windstream.net (rowedenny(at)windstream.net)> wrote:[quote] --> Kolb-List message posted by: "Denny Rowe" <rowedenny(at)windstream.net (rowedenny(at)windstream.net)>

---

Rex Rodebush

Joined: 10 Jan 2006
Posts: 209
Location: Branson West area, Missouri

Posted: Tue Jan 30, 2007 7:33 am Post subject: Re: Mk 3 steel main gear legs

I think Kolb supplied two designs for the steel legs.  A very flexible version (I think Steve Green has these); and a very stiff, heat treated version which I think is now the standard.  I traded my old aluminum legs to Travis & bought the new, stiff legs.  I installed extensions so they go up to the top of the "V" in the cage.  I had to use carbide bits to drill these.  They were very tough.  The deflection is minimal.  



See attached pictures for the extensions and the legs.



Rex Rodebush

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John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Tue Jan 30, 2007 7:54 am Post subject: Mk 3 steel main gear legs

| See attached pictures for the extensions and the legs.

|

| Rex Rodebush

Rex:



I think you may be a bit confused on the steel gear legs.



Normalized 4130 is stiff.  When bent, it will remain bent.



Heat treated 4130 is flexible.  When bent, it will return to its 

original shape.  It is now a spring.



john h

mkIII

_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Tue Jan 30, 2007 8:04 am Post subject: Mk 3 steel main gear legs

| I think Kolb supplied two designs for the steel legs.  | Rex 

Rodebush

Rex:



Forgot to mention in previous post.



The heat treated legs will seem very stiff until there is some weight 

on them.  Once you get the engine, wings, fuel, and your body in the 

airplane, the legs will get quite flexible.  Without the weight, they 

will seem like they will not bend.



john h

mkIII

_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

Rex Rodebush

Joined: 10 Jan 2006
Posts: 209
Location: Branson West area, Missouri

Posted: Tue Jan 30, 2007 8:31 am Post subject: Re: Mk 3 steel main gear legs

Hi John,



My understanding is that if you take a piece of 4140 normalized and bend it it will deflect to the yield point and then deform.  If you take the same piece and heat treat it (heat, quench and draw) to a higher yield it will then bend and deflect but will require a much higher force to bend the same amount and will therefore be stiffer (and also harder with the higher yield).



If I'm wrong on this let me know.  



Rex Rodebush

jindoguy(at)gmail.com
Guest

Posted: Tue Jan 30, 2007 8:38 am Post subject: Mk 3 steel main gear legs

John, One of the things that helped make up my mind to not install the steel legs is the need to change the wing angle of incidence (according to the TNK document that came with the legs). Did you do this and if so, how?

 

Rick



On 1/30/07, John Hauck <jhauck(at)elmore.rr.com (jhauck(at)elmore.rr.com)> wrote:[quote] --> Kolb-List message posted by: "John Hauck" <jhauck(at)elmore.rr.com (jhauck(at)elmore.rr.com)>

 | I think Kolb supplied two designs for the steel legs.  | Rex

Rodebush



 

Rex:



Forgot to mention in previous post.



The heat treated legs will seem very stiff until there is some weight

on them.  Once you get the engine, wings, fuel, and your body in the

airplane, the legs will get quite flexible.  Without the weight, they 

"Ya'll drop on in"

takes on a whole new meaning

when you live at the airport.  [quote][b]

Rex Rodebush

Joined: 10 Jan 2006
Posts: 209
Location: Branson West area, Missouri

Posted: Tue Jan 30, 2007 8:48 am Post subject: Re: Mk 3 steel main gear legs

Rex: 



"Forgot to mention in previous post. 



The heat treated legs will seem very stiff until there is some weight 

on them. Once you get the engine, wings, fuel, and your body in the 

airplane, the legs will get quite flexible. Without the weight, they..."

John,  



I agree, I think we are saying the same thing.



Also, I did not change the wing incendence.  These legs plus the fat tires will set me up higher so I'm closer to a 3 point stall landing, which I want.



Rex

John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Tue Jan 30, 2007 12:14 pm Post subject: Mk 3 steel main gear legs

| John, One of the things that helped make up my mind to not install 

the steel

| legs is the need to change the wing angle of incidence (according to 

the TNK

| document that came with the legs). Did you do this and if so, how?

|

| Rick



Rick:



No, I didn't do that.  First I heard of it.



My legs and main gear mounts were designed and fabricated by Brother 

Jim.  I left the incidence per what was called for in the plans. 

Would be nice to have less incidence, probably pick up  a few mph by 

having the tail boom fly straight through the air, rather than at an 

angle which increases drag.  A little late for that at this time. 

Don't want to change windshield, quarter windows, and lift struts.



I am pretty happy with 88 mph at 5,000 rpm empty with 10 gal fuel.  Of 

course this slows down to around 80 to 85 when I am seriously loaded 

to go traveling.  Still a decent cruise speed that has proven, if I am 

patient, I can get there and get home.



john h

mkIII

_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

Rex Rodebush

Joined: 10 Jan 2006
Posts: 209
Location: Branson West area, Missouri

Posted: Tue Jan 30, 2007 1:10 pm Post subject: Re: Mk 3 steel main gear legs

| John, One of the things that helped make up my mind to not install 

the steel 

| legs is the need to change the wing angle of incidence (according to 

the TNK 

| document that came with the legs). Did you do this and if so, how? 

| 

| Rick 



Rick: 



No, I didn't do that. First I heard of it.



John / Rick,



kolb is suppling a new rear wing attach fitting that is slightly wider than the old one.  This allows you to add washers on either side to raise or lower the trailing edge.  I wanted these just in case I needed them for fine tuning.  I think they were made so you could compensate for the new gear.  Travis could give you the details.



Rex

icrashrc

Joined: 16 Mar 2006
Posts: 247
Location: Mishawaka, In

Posted: Wed Jan 31, 2007 2:54 am Post subject: Re: Mk 3 steel main gear legs

No mention of changing the wing incidence on my plane either.

_________________
Scott

www.ill-EagleAviation.com

do not archive

rap(at)isp.com
Guest

Posted: Wed Jan 31, 2007 4:58 am Post subject: Mk 3 steel main gear legs

 	  Quote: 	
		   --> I got the paper work with my steel gear legs that recomended

changing the wing incidence. I did not do it. I will see how it flys
	


fist. I got my call back from the FAA for the inspection end of FEB.

Will have two inspectors they will be using it as a training leason for

the new guy.

 Kolb-List message posted by: "icrashrc" <icrashrc(at)aol.com>

 	  Quote: 	
		  

 No mention of changing the wing incidence on my plane either.



 --------

 Scott



 do not archive





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=91771#91771




	


-----------------------------------------

rowedenny(at)windstream.n
Guest

Posted: Thu Feb 01, 2007 11:51 am Post subject: Mk 3 steel main gear legs

Are this legs for a Mk-3 Classic?

 Do you still have them?

 Pic?

 Denny Rowe

 rowedenny(at)windstream.net (rowedenny(at)windstream.net)

  

 [quote]   ---

Steven Green

Joined: 05 Feb 2006
Posts: 118

Posted: Thu Feb 01, 2007 7:59 pm Post subject: Mk 3 steel main gear legs

Rex,



I have always used aluminum gear legs.  I have bent one set in about 500

hours.  Those were bent about 30 seconds after a rod bearing failed in a

582.  I was over Tellico lake when the engine failed and used up all of my

excess air speed to clear a line of trees that was between me and the field

I was going to land in.  After clearing the trees I was about 3 knots above

stall speed.....not enough to flare for a good landing.



Steven Green



 	  Quote: 	
		   



 I think Kolb supplied two designs for the steel legs.  A very flexible

version (I think Steve Green has these); and a very stiff, heat treated
	


version which I think is now the standard.  I traded my old aluminum legs to

Travis & bought the new, stiff legs.  I installed extensions so they go up

to the top of the "V" in the cage.  I had to use carbide bits to drill

these.  They were very tough.  The deflection is minimal.

 	  Quote: 	
		  

 See attached pictures for the extensions and the legs.



 Rex Rodebush

_________________
Steven Green

rowedenny(at)windstream.n
Guest

Posted: Thu Feb 01, 2007 8:53 pm Post subject: Mk 3 steel main gear legs

Are "these"

 [quote]   ---

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