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tedwaltman(at)i1ci.com
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 Posted: Wed Sep 13, 2006 5:52 pm Post subject: Moose Sea Fin design...2 questions & 2 pictures |
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I'm working on my horizontal stab. I've looked at a couple of design options for making a provision for the attachment of sea fins to the h-stab tip rib.
My first question is in the below picture. I'm concerned if I put a .032 doubler and then later install the actual sea fin (out of .040 ?) whether I'll have enough clearance for elevator travel.
[img]cid:709243301(at)14092006-1657[/img]
My next question involves a the fact that my main stabilizer tip rib is an older version, and I don't have the factory stabilizer hinge doubler. What I propose to do is to in stall 3 channel-type brackets that would each pick up 3 rivets on the top and bottom of the stringers--each as wide as the space between the coke-bottle indentations in my stabilizer tip rib and be flush riveted to the rib. A set of nut plates would also be installed in each of these channel brackets (blue & black in the below picture) for the sea fin attachment.
Then, to reinforce the front and rear tip rib attachment points to the main and rear spar, I'm going to put in short .040 angles like the one big blue area on the right of the picture (I know, graphics isn't my strong suit).
Opinions please?
[img]cid:709243301(at)14092006-165E[/img]
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ScottA
Joined: 05 Jan 2006
Posts: 100
Location: Park City, UT
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| Posted: Wed Sep 13, 2006 6:17 pm Post subject: Moose Sea Fin design...2 questions & 2 pictures |
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Ted, off the top of my head I would say No, not enough room for a doubler on the outside of the stab rib. The seafins are a lot thicker than .040 and they barely clear the elevator balance arms, any doublers would have to go inside – in my opinion.
The angle front and back sound like a good idea.
Not sure what you mean by not having the stabilizer hinge doubler – is that the stainless steel angle that MAM sent out for the hinge service bulletin? They used to send those out free – it all came with the stuff to fix the outboard wing rear spar aileron hinge bracket too.
Scott
From: owner-murphymoose-list-server(at)matronics.com [mailto:owner-murphymoose-list-server(at)matronics.com] On Behalf Of Ted Waltman
Sent: Wednesday, September 13, 2006 7:52 PM
To: murphymoose-list(at)matronics.com
Subject: Moose Sea Fin design...2 questions & 2 pictures
I'm working on my horizontal stab. I've looked at a couple of design options for making a provision for the attachment of sea fins to the h-stab tip rib.
My first question is in the below picture. I'm concerned if I put a .032 doubler and then later install the actual sea fin (out of .040 ?) whether I'll have enough clearance for elevator travel.
[img]cid:image001.jpg(at)01C6D771.94355FC0[/img]
My next question involves a the fact that my main stabilizer tip rib is an older version, and I don't have the factory stabilizer hinge doubler. What I propose to do is to in stall 3 channel-type brackets that would each pick up 3 rivets on the top and bottom of the stringers--each as wide as the space between the coke-bottle indentations in my stabilizer tip rib and be flush riveted to the rib. A set of nut plates would also be installed in each of these channel brackets (blue & black in the below picture) for the sea fin attachment.
Then, to reinforce the front and rear tip rib attachment points to the main and rear spar, I'm going to put in short .040 angles like the one big blue area on the right of the picture (I know, graphics isn't my strong suit).
Opinions please?
[img]cid:image002.jpg(at)01C6D771.94355FC0[/img]
| | - The Matronics MurphyMoose-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:
http://www.matronics.com/Navigator?MurphyMoose-List |
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tedwaltman(at)i1ci.com
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| Posted: Wed Sep 13, 2006 6:26 pm Post subject: Moose Sea Fin design...2 questions & 2 pictures |
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The problem is those coke-can indentations. They effectively prevent me from putting a doubler running the full length of the rib on the inside of the rib. Based on your clearance comments, and my doubler issue above, guess I better get the updated tip ribs from Murphy...along with the stab hinge doubler. Darn... have to set the h-stab aside then.
What about the sturdiness of my sea fin attach channels idea?
Thank you,
Ted
From: owner-murphymoose-list-server(at)matronics.com [mailto:owner-murphymoose-list-server(at)matronics.com] On Behalf Of Scott Aldrich
Sent: Wednesday, September 13, 2006 8:17 PM
To: murphymoose-list(at)matronics.com
Subject: RE: Moose Sea Fin design...2 questions & 2 pictures
Ted, off the top of my head I would say No, not enough room for a doubler on the outside of the stab rib. The seafins are a lot thicker than .040 and they barely clear the elevator balance arms, any doublers would have to go inside – in my opinion.
The angle front and back sound like a good idea.
Not sure what you mean by not having the stabilizer hinge doubler – is that the stainless steel angle that MAM sent out for the hinge service bulletin? They used to send those out free – it all came with the stuff to fix the outboard wing rear spar aileron hinge bracket too.
Scott
From: owner-murphymoose-list-server(at)matronics.com [mailto:owner-murphymoose-list-server(at)matronics.com] On Behalf Of Ted Waltman
Sent: Wednesday, September 13, 2006 7:52 PM
To: murphymoose-list(at)matronics.com
Subject: Moose Sea Fin design...2 questions & 2 pictures
I'm working on my horizontal stab. I've looked at a couple of design options for making a provision for the attachment of sea fins to the h-stab tip rib.
My first question is in the below picture. I'm concerned if I put a .032 doubler and then later install the actual sea fin (out of .040 ?) whether I'll have enough clearance for elevator travel.
[img]cid:349452302(at)14092006-16BA[/img]
My next question involves a the fact that my main stabilizer tip rib is an older version, and I don't have the factory stabilizer hinge doubler. What I propose to do is to in stall 3 channel-type brackets that would each pick up 3 rivets on the top and bottom of the stringers--each as wide as the space between the coke-bottle indentations in my stabilizer tip rib and be flush riveted to the rib. A set of nut plates would also be installed in each of these channel brackets (blue & black in the below picture) for the sea fin attachment.
Then, to reinforce the front and rear tip rib attachment points to the main and rear spar, I'm going to put in short .040 angles like the one big blue area on the right of the picture (I know, graphics isn't my strong suit).
Opinions please?
[img]cid:349452302(at)14092006-16C1[/img]
| | - The Matronics MurphyMoose-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:
http://www.matronics.com/Navigator?MurphyMoose-List |
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ScottA
Joined: 05 Jan 2006
Posts: 100
Location: Park City, UT
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| Posted: Wed Sep 13, 2006 6:30 pm Post subject: Moose Sea Fin design...2 questions & 2 pictures |
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I have pretty much what you describe to back up the nut plates – of course un-tested as my floats are not on. Some of my doublers did cover those indentations – I just put rivets where it was flush though.
From: owner-murphymoose-list-server(at)matronics.com [mailto:owner-murphymoose-list-server(at)matronics.com] On Behalf Of Ted Waltman
Sent: Wednesday, September 13, 2006 8:26 PM
To: murphymoose-list(at)matronics.com
Subject: RE: MurphyMoose-List: Moose Sea Fin design...2 questions & 2 pictures
The problem is those coke-can indentations. They effectively prevent me from putting a doubler running the full length of the rib on the inside of the rib. Based on your clearance comments, and my doubler issue above, guess I better get the updated tip ribs from Murphy...along with the stab hinge doubler. Darn... have to set the h-stab aside then.
What about the sturdiness of my sea fin attach channels idea?
Thank you,
Ted
From: owner-murphymoose-list-server(at)matronics.com [mailto:owner-murphymoose-list-server(at)matronics.com] On Behalf Of Scott Aldrich
Sent: Wednesday, September 13, 2006 8:17 PM
To: murphymoose-list(at)matronics.com
Subject: RE: MurphyMoose-List: Moose Sea Fin design...2 questions & 2 pictures
Ted, off the top of my head I would say No, not enough room for a doubler on the outside of the stab rib. The seafins are a lot thicker than .040 and they barely clear the elevator balance arms, any doublers would have to go inside – in my opinion.
The angle front and back sound like a good idea.
Not sure what you mean by not having the stabilizer hinge doubler – is that the stainless steel angle that MAM sent out for the hinge service bulletin? They used to send those out free – it all came with the stuff to fix the outboard wing rear spar aileron hinge bracket too.
Scott
From: owner-murphymoose-list-server(at)matronics.com [mailto:owner-murphymoose-list-server(at)matronics.com] On Behalf Of Ted Waltman
Sent: Wednesday, September 13, 2006 7:52 PM
To: murphymoose-list(at)matronics.com
Subject: Moose Sea Fin design...2 questions & 2 pictures
I'm working on my horizontal stab. I've looked at a couple of design options for making a provision for the attachment of sea fins to the h-stab tip rib.
My first question is in the below picture. I'm concerned if I put a .032 doubler and then later install the actual sea fin (out of .040 ?) whether I'll have enough clearance for elevator travel.
[img]cid:image001.jpg(at)01C6D773.73EDE820[/img]
My next question involves a the fact that my main stabilizer tip rib is an older version, and I don't have the factory stabilizer hinge doubler. What I propose to do is to in stall 3 channel-type brackets that would each pick up 3 rivets on the top and bottom of the stringers--each as wide as the space between the coke-bottle indentations in my stabilizer tip rib and be flush riveted to the rib. A set of nut plates would also be installed in each of these channel brackets (blue & black in the below picture) for the sea fin attachment.
Then, to reinforce the front and rear tip rib attachment points to the main and rear spar, I'm going to put in short .040 angles like the one big blue area on the right of the picture (I know, graphics isn't my strong suit).
Opinions please?
[img]cid:image002.jpg(at)01C6D773.73EDE820[/img]
| | - The Matronics MurphyMoose-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:
http://www.matronics.com/Navigator?MurphyMoose-List |
|
| Description: |
|
| Filesize: |
39.45 KB |
| Viewed: |
504 Time(s) |
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| Description: |
|
| Filesize: |
48.98 KB |
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