Showtime 90 hor stab concern  
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Showtime 90 hor stab concern - 4/4/2008 3:42:20 PM   
fastplane


 

Posts: 271
Joined: 7/24/2004
From: Houston, TX, USA
Status: offline 		Mike, I am completing the ST 4D 90 and am concerned about the horizontal stabilizer. I never had a plane that the stabilizer was two parts. After following the directions to tap the tube for the 4-40 screw and installing the stabs tightly to the fuse I noticed there is some give up and down with the stab when I move them by hand. It seems this movement will cause some un-desired results when performing aerobatics. Is this by design? How can I get the stab to be stable? Thanks.
       Post #: 1

RE: Showtime 90 hor stab concern - 4/7/2008 3:03:08 PM   
MMcConville


 

Posts: 2021
Joined: 6/26/2003
From: Champaign, IL, USA
Status: offline 		Some wobble ca happen with stab tubes because of the smaller contact area. The easiest fix is to brush a thin coat of finishing resin into the socket in the fuse to tighten the fit on the alum tube. Its very easy to do.

_____________________________

Mike McConville
Horizon Hobby

(in reply to fastplane)
       Post #: 2

RE: Showtime 90 hor stab concern - 4/7/2008 6:42:03 PM   
fastplane


 

Posts: 271
Joined: 7/24/2004
From: Houston, TX, USA
Status: offline 		Thanks Mike for the help. I am not sure what finishing resin is. I have some resin for epoxy but it never dries.
The tubes seem to be tight but I suppose they could have a tighter fit.
The movement I notice is at the stab to fuse junction. I was careful to minimize space between both stabs and fuse but still a slight space.
My main concerns are:
1. Movement will interfere with aerobatic flying
2. Air flow will make any movement worse in time by wearing down the wood on the stab and fuse.

(in reply to MMcConville)
       Post #: 3

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