Small Horizontal Stab Construction

Submitted by Anonymous on

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From: William R. Olsen <wrolsen [at] bc.sympatico.ca>
Subject: Small Horizontal Stab Construction
Date: Sun, 27 Dec 1998 10:39:41 -0800
To: <lancair.list [at] olsusa.com>

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Hello...







I am assembling my small horizontal stab and have noticed that there



seem to be a number of different internal rib / spar layouts.  My kit



is a 235 and will, at least initially, have a 235 installed in it.  The



drawings supplied with the kit show 5 ribs and 1 full length aft closeout



spar.  The Lancair brochure of the same vintage as my kit shows a 320



horizontal stab with 6 ribs and 2 full length spars.  Does anyone have



any/enough experience with these different internal structures to



advise me whether or not a deviation from the 235 drawings would be in



order?







Any other suggested changes to the 235 horizontal or vertical tail



would be greatly appreciated.







Thanks







Bill Olsen

Small Horizontal Stab Construction

Submitted by Anonymous on

From: John Cooper <heyduke [at] digital.net>
Subject: Small Horizontal Stab Construction
Date: Sun, 27 Dec 1998 17:35:45 -0500
To: <lancair.list [at] olsusa.com>
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I made three modifications to my L-235 horizontal stab.



First, I replaced the single rib on the centerline with two ribs separated

by roughly 6 inches so that each rib was aligned over the support area on

the fuselage/vertical stab.



Second, I installed an additional partial spar at approximately 25% of

chord (including the elevators). I made this spar out of 1/4" foam core

with 2 bid, and attached it with one bid. I ran it out to the ribs in the

middle of the span. It's something like 24" long, but I can't remember

without digging out the progress photos.



I also installed some nylon tubing inside the horizontal stab so I could

install a wire nav antenna later on if I wanted. But it is probably

impossible for me to reach that area of the tail cone now even if I wanted

to. Sounded like a good idea at the time...