Sorry i pushed the send button first. I know this is off list 
butt......Mark,What do you consider the best book on carbon fiber in a how to 
book for dyi?As always i appreciate your input.Bill Jacobs


------ Original message------From: Mark Langford via KRnet Date: Mon, May 30, 
2016 2:12 PMTo: KRnet;Cc: Mark Langford;Subject:Re: KR> Split elevator & Gap 
Seals for elevator/rudderFrank Hamelly wrote:> I want to use a split elevator 
on my KR and am wondering how to> attach the two halves in the middle to 
maintain structural integrity.> I've seen that Steve Anderson's KR used a split 
elevator but how were> the two sides fused?Steve's are joined something like 
the enclosed sketch (although maybe it has two bolts), using some thicker spar 
material (maybe an inch tall) and 1/8" aluminum plates front and back.  I 
thought about doing something similar to mine when I was building it, but with 
20/20 hindsight, it would have been a waste of time and weight.  I used simple 
Oilite (bronze impregnated bushings) hinge bushings in the plans aluminum 
brackets, and they are still slop free after 1130 hours.  I put the access 
slots on the bottom of the horizontal stab (or elevator, I forget which) so 
that the slot was only exposed when the elevator was fully deflected.  This way 
it didn't affect flow at the joint.  More on that at 
http://www.n56ml.com/kht.html .> Also, thinking about using gap seals between 
the horizontal and> vertical stabs and the elevator/rudder. I have a 7/8" gap 
to fill> which seems like it would be much easier to use than building up the> 
bull nose on the leading edges while providing clear access to the> hinges. I'm 
using the rod-end bearing hinge design, with 5 hinges> instead of 3.You've 
probably seen how I did the bull-nosed thing (at http://www.n56ml.com/kvs.html 
), but what I didn't show is how I deleted the cutouts for accessing the 
connecting bolts, because I deleted the connecting bolts entirely by using a 
3/16" 4130 tube to join the rudder to the vertical stab.  It dropped in from 
above and got the top two hinges, and then another short one was inserted from 
below.  Both had a little 4130 tab welded on the end for a #6 wood screw to 
hold the pins in place, although the bottom one was captured by the tailspring 
and the top one had gravity working for it. The 4130 tube was a lot lighter 
than the three bolts and nuts would have been, and it was dirt simple to get 
the elecvator off....but again, there was no slop after 1130 hours anyway, 
using only three hinges.  And I use my rudder a lot...Mark LangfordML at 
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