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Clay.S
Joined: 25 Apr 2012
Posts: 4
Location: Fishers, IN
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 Posted: Wed Mar 08, 2017 7:47 am Post subject: Ultraster Rib Stampings info wanted |
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I'd like to know the gauge and alloy on the aluminum used on the Ulstrastar rib stampings if anyone has that info.
My Ultrastar "kit" is missing the rib stampings, so I have a call into the factory re purchasing them if they are still the same as current designs, but otherwise will need to fabricate them - many thanks.
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Wed Mar 08, 2017 8:47 am Post subject: Ultraster Rib Stampings info wanted |
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US main spar rib gusset should be the same as the FS, FSII, FSKX.
john h
MKIII
Titus, AL
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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Herbgh(at)nctc.com
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| Posted: Wed Mar 08, 2017 9:19 am Post subject: Ultraster Rib Stampings info wanted |
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I went to my Aircraft Spruce north store, better known as a tobacco
barn, and measured .029/.030 there bouts... .025 and .032 are the
thickness’s shown at Aircraft Spruce south.. Doubt that it would be 2024
t3 as I do not think it would stand up to rolling the lip. And rolling
the lip for the spar tube requires a die and a specialized tool with a
couple of bearings . Maybe a modified boring tool....used in a vertical
mill..
Last time I asked...TNK did not want to sell parts for ribs...and ribs
were maybe 75 bucks..likely near 100 now..for that was 10 years ago...
There should be broken wings and kits laying here and there...I
think the Firefly also uses that rib..Same shape and spar hole...only
difference might be thinner gussets and the spar flange gusset...Herb
On 03/08/2017 10:47 AM, John Hauck wrote:
[quote]
US main spar rib gusset should be the same as the FS, FSII, FSKX.
john h
MKIII
Titus, AL
--
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Richard Pike
Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee
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| Posted: Wed Mar 08, 2017 1:51 pm Post subject: Re: Ultraster Rib Stampings info wanted |
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Not sure, but I think these might be US parts. Welcome to them if you want them.
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_________________
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0
Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing. |
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Wed Mar 08, 2017 3:03 pm Post subject: Ultraster Rib Stampings info wanted |
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US main spar attachment on inboard rib had little torsional resistance.
Huge barn door full span ailerons would twist the wing and cancel out the
aileron input. Could not be ham fisted or fly the US aggressively in roll.
That really bothered me when I first started flying my US. My US was the
first fixed wing I had ever flown. I was used to rotary wing input and
results. First time I dove on my house and tried to pull out with a big
wingover the US kept right on heading for the lake. I had a lot to learn
about flying Kolbs.
My original FS had the new ring main spar attach system with minimal wing
twist. What a great improvement.
I was upset about the US wing twist until I talked with an old AF bomber
pilot and his experience with wing twist. Seems he flew the B-47 for a
spell and had the same wing twist problem with it as I did my little UL. I
felt a little better after I discovered that. He said aileron input
promptly canceled out with wing twist. Had to be gentle flying the B-47.
john h
mkIII
Titus, AL
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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victorbravo(at)sbcglobal.
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| Posted: Wed Mar 08, 2017 3:31 pm Post subject: Ultraster Rib Stampings info wanted |
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John H do you know what the mechanical/structural difference was between the US and later FS wing attach structure?
Sincea large tubular spar itself is fairly resistant to torsional movement, where was the "weakness" or lack of stiffness that allowed the wing to twist?
Bill Berle
www.ezflaphandle.com - safety & performance upgrade for light aircraft
www.grantstar.net      - winning proposals for non-profit and for-profit entities
--------------------------------------------
On Wed, 3/8/17, John Hauck <jhauck(at)elmore.rr.com> wrote:
Subject: RE: Re: Ultraster Rib Stampings info wanted
To: kolb-list(at)matronics.com
Date: Wednesday, March 8, 2017, 3:02 PM
"John Hauck" <jhauck(at)elmore.rr.com>
US main spar attachment on inboard rib had little torsional
resistance.
Huge barn door full span ailerons would twist the wing and
cancel out the
aileron input. Could not be ham fisted or fly the US
aggressively in roll.
That really bothered me when I first started flying my
US. My US was the
first fixed wing I had ever flown. I was used to
rotary wing input and
results. First time I dove on my house and tried to
pull out with a big
wingover the US kept right on heading for the lake. I
had a lot to learn
about flying Kolbs.
My original FS had the new ring main spar attach system with
minimal wing
twist. What a great improvement.
I was upset about the US wing twist until I talked with an
old AF bomber
pilot and his experience with wing twist. Seems he
flew the B-47 for a
spell and had the same wing twist problem with it as I did
my little UL. I
felt a little better after I discovered that. He said
aileron input
promptly canceled out with wing twist. Had to be
gentle flying the B-47.
john h
mkIII
Titus, AL
--
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Herbgh(at)nctc.com
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| Posted: Wed Mar 08, 2017 3:47 pm Post subject: Ultraster Rib Stampings info wanted |
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Yep...That is what I removed them from...the root ribs ...but not the h
sections...the other h section was from a boom tube ...Herb
On 03/08/2017 03:51 PM, Richard Pike wrote:
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"Masculine republics give way to feminine democracies, and feminine democracies give way to tyranny."
Aristotle
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Wed Mar 08, 2017 4:19 pm Post subject: Ultraster Rib Stampings info wanted |
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The wing twisted because there were only two tubes, top and bottom of main spar, to prevent twist. The FS had a full 4130 band (ring) same same the tail post ring to prevent twist.
You'd have a hard time twisting the 5 and 6 inch spars.
john h
mkIII
Titus, Alabama
--
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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Clay.S
Joined: 25 Apr 2012
Posts: 4
Location: Fishers, IN
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| Posted: Wed Mar 08, 2017 6:33 pm Post subject: Re: Ultraster Rib Stampings info wanted |
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John H - thank you for the info on the stampings.
Richard - thank you. I happen to have those parts but really appreciate the offer.
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Clay.S
Joined: 25 Apr 2012
Posts: 4
Location: Fishers, IN
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| Posted: Fri Mar 10, 2017 6:18 am Post subject: Re: Ultraster Rib Stampings info wanted |
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How about the Firestar rib stampings - can anyone give me the gauge and alloy for those?
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victorbravo(at)sbcglobal.
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| Posted: Fri Mar 10, 2017 9:35 am Post subject: Ultraster Rib Stampings info wanted |
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The alloy will be 6061-T6 (like the rest of the airplane), and I believe the gauge will LIKELY be .025"
Bill Berle
www.ezflaphandle.com - safety & performance upgrade for light aircraft
www.grantstar.net      - winning proposals for non-profit and for-profit entities
--------------------------------------------
On Fri, 3/10/17, Clay.S <clayspurgeon(at)gmail.com> wrote:
Subject: Re: Ultraster Rib Stampings info wanted
To: kolb-list(at)matronics.com
Date: Friday, March 10, 2017, 6:18 AM
"Clay.S" <clayspurgeon(at)gmail.com>
How about the Firestar rib stampings - can anyone give me
the gauge and alloy for those?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=467138#467138
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Fri Mar 10, 2017 10:44 am Post subject: Ultraster Rib Stampings info wanted |
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Main spar gusset is .032" 6061-T6.
Couldn't remember for sure, so I measured one with a micrometer.
john h
mkIII
Titus, AL
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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Clay.S
Joined: 25 Apr 2012
Posts: 4
Location: Fishers, IN
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| Posted: Mon Mar 13, 2017 5:00 pm Post subject: Re: Ultraster Rib Stampings info wanted |
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Great - thanks!
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