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jbhart(at)onlyinternet.ne
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 Posted: Sun Sep 06, 2009 5:42 am Post subject: Tail Wire Tangs Breaking And other Tail Brace |
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Date: Sun, 6 Sep 2009 05:43:51 -0500
From: Richard Girard <aslsa.rng(at)gmail.com>
| Quote: |
Jack, Thanks. One minor point. At least on my MkIII the tail wires are 3/32"
|
7 X 7 cable which has a breaking strength of 980 lb. My Firestar has the
same.
Rick,
You are quite right, I did not get the correct cable size.
One thing that the math does not provide is the load at which the tail will
stall. I believe it will stall long before six G's, and so the cable and
tangs will more than support the load. The greatest chance for failure
comes from the added / superimposed load due to over
tightening.
Jack B. Hart FF004
Winchester, IN
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capedavis(at)yahoo.com
Guest
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| Posted: Mon Sep 07, 2009 7:49 am Post subject: Tail Wire Tangs Breaking And other Tail Brace |
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Jack and Kolbers , I am just starting work on building my tail on my Firefly I have the wings just about done in Fl. but brought the tail section back to Ma. with me, as I could.
My question to you all that have built a Firefly is, when building the Horizontal stabilizer the inst. manual says to cut 2 , 6 inch pieces of 3/4 tube to incert in the trailing edge where the support cable bolts on, then I look at the plans and they show the bolt for that cable in the center of the 6 inch piece 12 1/2 inches for the end then I look at the plans where it bshows the cables etc. and the bolt is at 12 inches ????????That being I look at the 2 pieces of 3/4 inch tubing with a very heavy wall , about 1/8 inch that are machined to fit inside 7/8 tubing and they are 4 inches ? maybe because they are heavy wall they didnt make them 6 inches ???? or perhaps they are for another application and I am supposed to cut 2 , 6inch pieces as it says in the manual ? does anybody know? Of course I started this on Sunday the day before Labor Day so neither Travis or Brian are at work , but life goes on ! Thanks in advance Chris
Chris Davis 58 thursday
KXP 503 492 hrs
Glider Pilot
Disabled from crash building Firefly
From: Jack B. Hart <jbhart(at)onlyinternet.net>
To: kolb-list(at)matronics.com
Sent: Sunday, September 6, 2009 10:40:11 AM
Subject: Kolb-List: Re: Tail Wire Tangs Breaking And other Tail Brace
--> Kolb-List message posted by: "Jack B. Hart" <jbhart(at)onlyinternet.net (jbhart(at)onlyinternet.net)>
Date: Sun, 6 Sep 2009 05:43:51 -0500
From: Richard Girard <aslsa.rng(at)gmail.com (aslsa.rng(at)gmail.com)>
| Quote: |
Jack, Thanks. One minor point. At least on my MkIII the tail wires are 3/32"
|
7 X 7 cable which has a breaking strength of 980 lb. My Firestar has the
same.
Rick,
You are quite right, I did not get the correct cable size.
One thing that the math does not provide is the load at which the tail will
stall. I believe it will stall long before six G's, and so the cable and
tangs will more than support the load. The greatest chance for failure
comes from the added / superimposed load due to over
tightening.
Jack B. Hart FF004
Winbsp; -Matt Dralle, ===========
[quote][b]
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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capedavis(at)yahoo.com
Guest
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| Posted: Mon Sep 07, 2009 8:21 am Post subject: Tail Wire Tangs Breaking And other Tail Brace |
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Chris Davis
KXP 503 492 hrs
Glider Pilot
Disabled from crash building Firefly
----- Forwarded Message ----
From: chris davis <capedavis(at)yahoo.com>
To: kolb-list(at)matronics.com
Sent: Monday, September 7, 2009 11:47:03 AM
Subject: Re: Re: Tail Wire Tangs Breaking And other Tail Brace
Jack and Kolbers , I am just starting work on building my tail on my Firefly I have the wings just about done in Fl. but brought the tail section back to Ma. with me, as I could.
My question to you all that have built a Firefly is, when building the Horizontal stabilizer the inst. manual says to cut 2 , 6 inch pieces of 3/4 tube to incert in the trailing edge where the support cable bolts on, then I look at the plans and they show the bolt for that cable in the center of the 6 inch piece 12 1/2 inches for the end then I look at the plans where it bshows the cables etc. and the bolt is at 12 inches ????????That being I look at the 2 pieces of 3/4 inch tubing with a very heavy wall , about 1/8 inch that are machined to fit inside 7/8 tubing and they are 4 inches ? maybe because they are heavy wall they didnt make them 6 inches ???? or perhaps they are for another application and I am supposed to cut 2 , 6inch pieces as it says in the manual ? does anybody know? Of course I started this on Sunday the day before Labor Day so neither Travis or Brian are at work , but life goes on ! Thanks in advance Chris
Chris Davis 58 thursday
KXP 503 492 hrs
Glider Pilot
Disabled from crash building Firefly
From: Jack B. Hart <jbhart(at)onlyinternet.net>
To: kolb-list(at)matronics.com
Sent: Sunday, September 6, 2009 10:40:11 AM
Subject: Kolb-List: Re: Tail Wire Tangs Breaking And other Tail Brace
--> Kolb-List message posted by: "Jack B. Hart" <jbhart(at)onlyinternet.net (jbhart(at)onlyinternet.net)>
Date: Sun, 6 Sep 2009 05:43:51 -0500
From: Richard Girard <aslsa.rng(at)gmail.com (aslsa.rng(at)gmail.com)>
| Quote: |
Jack, Thanks. One minor point. At least on my MkIII the tail wires are 3/32"
|
7 X 7 cable which has a breaking strength of 980 lb. My Firestar has the
same.
Rick,
You are quite right, I did not get the correct cable size.
One thing that the math does not provide is the load at which the tail will
stall. I believe it will stall long before six G's, and so the cable and
tangs will more than support the load. The greatest chance for failure
comes from the added / superimposed load due to over
tightening.
Jack B. Hart FF004
Winbsp; -Matt Dralle, ===========
__________________________________________________<[quote][b]
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