The Murphy Builders Site

Date: Wed, 14 Jan 2009 16:14:25 -0800
From: dazey@earthlink.net
To: rebel-builders@dcsol.com
Subject: [rebel-builders] Rebel Rudder Tip Rib Orientation?

Hello Group:

After several years, I am revisiting my Fife rudder tail tip section on so I can complete the installation.

Any comments on what is the correct orientation for the RUDDER tail tip rib(s) (EL-29 and FIN-35)? I need to confirm whether flanges (EL-29 & FIN-35) point UP or flanges point DOWN as installed in the fiberglass tip and when installed onto the rudder? The single isometric exploded parts view drawing for the RUDDER that I have shows the flanges pointing UP. However, I have a note from many years ago where Robyn mentioned that "the correct orientation as shown in Chapter 7" (flanges pointing DOWN for the RUDDER). I keep going back to that single isometric drawing that shows the rib flanges pointing UP. Another issue is that if the EL-29/FIN-35 is oriented/installed with the flanges UP, there would be a need for a relatively large hole in the aft end of the EL-29 channel, so upon tip installation, the channel will slide over the top rudder spar attach bolt and the neighboring smaller safety wire bolt.

It seems to me, with the flanges pointing DOWN and with hard left or right rudder in flight, the fiberglass tip would act like "a scoop in the wind" which might put unnecessary stress on the fiberglass tip, attach screws and other hardware downstream.

Any thoughts? Comments? Maybe a non-issue? Everything clear as mud?

Thanks in advance.

Terry Dazey
Rebel 662




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Hello Group:

After several years, I am revisiting my Fife rudder tail tip section on so I can complete the installation.

Any comments on what is the correct orientation for the RUDDER tail tip rib(s) (EL-29 and FIN-35)? I need to confirm whether flanges (EL-29 & FIN-35) point UP or flanges point DOWN as installed in the fiberglass tip and when installed onto the rudder? The single isometric exploded parts view drawing for the RUDDER that I have shows the flanges pointing UP. However, I have a note from many years ago where Robyn mentioned that "the correct orientation as shown in Chapter 7" (flanges pointing DOWN for the RUDDER). I keep going back to that single isometric drawing that shows the rib flanges pointing UP. Another issue is that if the EL-29/FIN-35 is oriented/installed with the flanges UP, there would be a need for a relatively large hole in the aft end of the EL-29 channel, so upon tip installation, the channel will slide over the top rudder spar attach bolt and the neighboring smaller safety wire bolt.

It seems to me, with the flanges pointing DOWN and with hard left or right rudder in flight, the fiberglass tip would act like "a scoop in the wind" which might put unnecessary stress on the fiberglass tip, attach screws and other hardware downstream.

Any thoughts? Comments? Maybe a non-issue? Everything clear as mud?

Thanks in advance.

Terry Dazey
Rebel 662

From: Ken <klehman@albedo.net>
Sent: Jan 15, 2009 12:55 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] Rebel Rudder Tip Rib Orientation?

Terry
Some guys reverse them and that does perhaps look a bit better on close
inspection but after consideration I installed as per the manual with
flanges down/inboard. Think it seemed easier at the time.
Ken

Terry Dazey wrote:

Hello Group:

After several years, I am revisiting my Fife rudder tail tip section on so I can complete the installation.

Any comments on what is the correct orientation for the RUDDER tail tip rib(s) (EL-29 and FIN-35)? I need to confirm whether flanges (EL-29 & FIN-35) point UP or flanges point DOWN as installed in the fiberglass tip and when installed onto the rudder? The single isometric exploded parts view drawing for the RUDDER that I have shows the flanges pointing UP. However, I have a note from many years ago where Robyn mentioned that "the correct orientation as shown in Chapter 7" (flanges pointing DOWN for the RUDDER). I keep going back to that single isometric drawing that shows the rib flanges pointing UP. Another issue is that if the EL-29/FIN-35 is oriented/installed with the flanges UP, there would be a need for a relatively large hole in the aft end of the EL-29 channel, so upon tip installation, the channel will slide over the top rudder spar attach bolt and the neighboring smaller safety wire bolt.

It seems to me, with the flanges pointing DOWN and with hard left or right rudder in flight, the fiberglass tip would act like "a scoop in the wind" which might put unnecessary stress on the fiberglass tip, attach screws and other hardware downstream.

Any thoughts? Comments? Maybe a non-issue? Everything clear as mud?

Thanks in advance.

Terry Dazey
Rebel 662

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From: Jesse Jenks <jessejenks@hotmail.com>
Sent: Jan 14, 2009 8:20 PM
To: Builders list <rebel-builders@dcsol.com>
Subject: RE: [rebel-builders] Rebel Rudder Tip Rib Orientation?


Terry,
I made my Fife tail tips all composite. I made plywood ribs, coated them with epoxy and glassed them in with extra glass on the elevator tips.

Date: Wed, 14 Jan 2009 16:14:25 -0800
From: dazey@earthlink.net
To: rebel-builders@dcsol.com
Subject: [rebel-builders] Rebel Rudder Tip Rib Orientation?

Hello Group:

After several years, I am revisiting my Fife rudder tail tip section on so I can complete the installation.

Any comments on what is the correct orientation for the RUDDER tail tip rib(s) (EL-29 and FIN-35)? I need to confirm whether flanges (EL-29 & FIN-35) point UP or flanges point DOWN as installed in the fiberglass tip and when installed onto the rudder? The single isometric exploded parts view drawing for the RUDDER that I have shows the flanges pointing UP. However, I have a note from many years ago where Robyn mentioned that "the correct orientation as shown in Chapter 7" (flanges pointing DOWN for the RUDDER). I keep going back to that single isometric drawing that shows the rib flanges pointing UP. Another issue is that if the EL-29/FIN-35 is oriented/installed with the flanges UP, there would be a need for a relatively large hole in the aft end of the EL-29 channel, so upon tip installation, the channel will slide over the top rudder spar attach bolt and the neighboring smaller safety wire bolt.

It seems to me, with the flanges pointing DOWN and with hard left or right rudder in flight, the fiberglass tip would act like "a scoop in the wind" which might put unnecessary stress on the fiberglass tip, attach screws and other hardware downstream.

Any thoughts? Comments? Maybe a non-issue? Everything clear as mud?

Thanks in advance.

Terry Dazey
Rebel 662




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