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Baby's got some new shoes

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lcottrell

Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or

Posted: Sat Apr 15, 2017 3:48 pm Post subject: Baby's got some new shoes

I finally got my new rims from Matco. They had been on back order for

almost a month, at least it seems that way. I had already ordered the

8.50 X 6 tundra tires and tubes.



Today dawned cold, 22 degrees but calm for a change. It eventually

warmed up to 44 degrees and I went to the hanger to start my tire

mounting. I drilled 6 holes in the rims to screw the tires to the

rims. The tires fit tight enough that it takes about 20 lbs of air to

make them pop out on the rims. That is unlike the Azusa rims that

depend on small flanges on the inside of the rims to keep them from

spinning. Since I want to run 5 lbs or less I am still not going to

take a chance on shearing off the valve stem, thus 6 screws per side.



Before I changed from the 8.00 X6 tires, I rolled the plane out and

flew all four corners of the compass with a vid camera to monitor my

airspeed. The speed averaged out to be about 66 MPH indicated. The

same on the ground speed depending on with or against the wind. There

was little wind, and my ASI and Ground speed are really close under

those conditions.



I drilled and cut threads in the rims, and then mounted the tires.

Since the 8.00 x 6 tires are on Matco rims as well, I just changed the

three bolts that held the bearings in the other tires and changed them

to the new tundras.



The wind was still holding its breath, so I rolled the plane back out

to check the difference. It seems to roll better with the tundra's on

it. I taxiied to the other end of the runway, and began my take off. I

cannot be sure, but the tires with 5 lbs of air, seemed to bounce a

bit on take off, but I could not be sure. When I pulled back on the

stick it flew quickly. I tend to push the stick forward to pick up

speed, so it could have been trying to fly, while I was pushing it

back on the ground. I will be doing a lot more testing when the

weather again cooperates. My take off seemed to be quite a bit shorter

than normal.



In essence there was no indication that my air speed suffered at all.

It was quite turbulent so I only made a circuit and half. While I

seemed to bounce a bit on take off, I bounced not at all on landing.

The tires at 5 lbs are really nice. They appear to not need balancing,

unlike the 8.00X6's.

Larry



-- 

The older I get, the less tolerant I am of those who are intolerant of others.



If you forward this email, or any part of it, please remove my email

address before sending.

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stuart(at)harnerfarm.net
Guest

Posted: Sat Apr 15, 2017 4:52 pm Post subject: Baby's got some new shoes

Larry,



Are you using tubes in these tires? If so, how do you keep the screws from puncturing the tubes?



Just curious as I am happy with my Black Max brakes, tubeless tires and aluminum  wheels on my Firefly. Apples and oranges, I know....



Stuart



--

lcottrell

Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or

Posted: Sat Apr 15, 2017 5:19 pm Post subject: Baby's got some new shoes

You wrote:   Are you using tubes in these tires? If so, how do you

keep the screws from puncturing the tubes?



Yes these are tube type tires. The screws don't go all the way through

the inside rim of the tire. The screws are 3/4, so I put a washer on

them and they are just right for length that way.

Larry

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John Hauck

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

Posted: Sun Apr 16, 2017 3:27 pm Post subject: Baby's got some new shoes

Sounds good.



Reckon sitting more nose high helped with your takeoff?



john h

mkIII

Titus, Alabama





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

lcottrell

Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or

Posted: Sun Apr 16, 2017 3:53 pm Post subject: Baby's got some new shoes

On Sun, Apr 16, 2017 at 5:27 PM, John Hauck <jhauck(at)elmore.rr.com> wrote:

 	  Quote: 	
		   



 Sounds good.



 Reckon sitting more nose high helped with your takeoff?


	




I think that it did, seems a lot shorter. I just went back and looked

at the video and as near as I can tell I lifted off at 34 MPH

indicated. Stall is 29-30 . With the taller tires it is sitting at the

angle that it is when it actually stalls, so it would appear to be at

optimum attitude.



I am experiencing some bouncing at the same time that it wants to fly.

Not sure if it is dribbling or, starting to bounce. Need more take

off's to tell. Actually an observer would be just the thing.



Larry

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russk50(at)gmail.com
Guest

Posted: Sun Apr 16, 2017 4:00 pm Post subject: Baby's got some new shoes

Hey, Larry, you got an interesting problem. I’d be gad to observe & photograph your TO’s

Just pay my travel from  Maine!

Fair winds,

Russ K

 	  Quote: 	
		   On Apr 16, 2017, at 7:53 PM, Larry Cottrell <lcottrell1020(at)gmail.com> wrote:

 On Sun, Apr 16, 2017 at 5:27 PM, John Hauck <jhauck(at)elmore.rr.com> wrote:

> 

> 

> Sounds good.

> 

> Reckon sitting more nose high helped with your takeoff?

 I think that it did, seems a lot shorter. I just went back and looked

 at the video and as near as I can tell I lifted off at 34 MPH

 indicated. Stall is 29-30 . With the taller tires it is sitting at the

 angle that it is when it actually stalls, so it would appear to be at

 optimum attitude.

 I am experiencing some bouncing at the same time that it wants to fly.

 Not sure if it is dribbling or, starting to bounce. Need more take

 off's to tell. Actually an observer would be just the thing.

 Larry

lcottrell

Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or

Posted: Sun Apr 16, 2017 4:15 pm Post subject: Baby's got some new shoes

you wrote: 



Hey, Larry, you got an interesting problem. I’d be gad to observe &

photograph your TO’s

Just pay my travel from  Maine!

Fair winds,

Russ K



Sounds good, but after buying all those rims, tires and tubes, my

slush fund is a bit under the weather. However if you toss your stuff

in your plane and start out now, you could be here in a week or two.

Larry

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russk50(at)gmail.com
Guest

Posted: Sun Apr 16, 2017 4:25 pm Post subject: Baby's got some new shoes

Would love to fly out to you but I’m plane-less at the mo.Have made 6 coast-coast trips in Cessnas, GREAT fun &

would love to do another.

I’ll work on the Lotto

Good luck,

Russ



 	  Quote: 	
		  On Apr 16, 2017, at 8:15 PM, Larry Cottrell <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)> wrote:

--> Kolb-List message posted by: Larry Cottrell <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)>you wrote: --> Kolb-List message posted by: Russ Kinne <russk50(at)gmail.com (russk50(at)gmail.com)>Hey, Larry, you got an interesting problem. I’d be gad to observe &photograph your TO’sJust pay my travel from  Maine!Fair winds,Russ KSounds good, but after buying all those rims, tires and tubes, myslush fund is a bit under the weather. However if you toss your stuffin your plane and start out now, you could be here in a week or two.Larryhttp://www.matronics.com/Navigator?Kolb-Listhttp://wiki.matronics.com

John Hauck

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

Posted: Sun Apr 16, 2017 4:50 pm Post subject: Baby's got some new shoes

Maybe you are trying to make the airplane fly too soon.  Keep the nose down until you get well stall, then pull the nose up.



It gets light, but not light enough to fly.  5 psi in big tires have a lot of reflex.



Just the thoughts of a guy that has never flown anything bigger than an 8x6, which seemed huge for a short time after upsizing from 6x6.  Now they are just regular tires.



john h

mkIII

Titus, Alabama





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

John Hauck

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

Posted: Sun Apr 16, 2017 5:10 pm Post subject: Baby's got some new shoes

I'm tired and can't type.



I meant to say "keep the nose down until you get well "above" stall."



john h

mkIII

Titus, Alabama





--

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

lcottrell

Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or

Posted: Sun Apr 16, 2017 5:19 pm Post subject: Baby's got some new shoes

-> Kolb-List message posted by: "John Hauck" <jhauck(at)elmore.rr.com>



Maybe you are trying to make the airplane fly too soon.  Keep the nose

down until you get well stall, then pull the nose up.

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

Actually it was the "bouncing" that prompted me to pull it up.

Something similar happened on the first take off, so I was prepared

for it. Just don't know what causes it. I am wondering if a bit more

air might clear it up. The first time I can fly, I will set another

camera up to film the take off as it happens from in front. It is

nothing more than a curious occurrence.

Larry

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victorbravo(at)sbcglobal.
Guest

Posted: Sun Apr 16, 2017 11:18 pm Post subject: Baby's got some new shoes

Wow ! Now I'm suffering from "Tire Envy" ! The airplane looks mighty serious with those tires. 



Bill Berle

www.ezflaphandle.com  - safety & performance upgrade for light aircraft

www.grantstar.net           - winning proposals for non-profit and for-profit entities



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

On Sun, 4/16/17, Larry Cottrell <lcottrell1020(at)gmail.com> wrote:



 Subject: Re: Baby's got some new shoes

 To: "kolb-list(at)matronics.com" <kolb-list(at)matronics.com>

 Date: Sunday, April 16, 2017, 6:15 PM

 

 

 Cottrell <lcottrell1020(at)gmail.com>

 

 -> Kolb-List message posted by:

 "John Hauck" <jhauck(at)elmore.rr.com>

 

 Maybe you are trying to make the

 airplane fly too soon.  Keep the nose

 down until you get well stall, then

 pull the nose up.

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

 

 

 Actually it was the "bouncing" that

 prompted me to pull it up.

 Something similar happened on the first

 take off, so I was prepared

 for it. Just don't know what causes it.

 I am wondering if a bit more

 air might clear it up. The first time I

 can fly, I will set another

 camera up to film the take off as it

 happens from in front. It is

 nothing more than a curious

 occurrence.

 Larry

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