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		lozhoffman(at)yahoo.com Guest
 
 
 
 
 
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				 Posted: Wed Aug 02, 2006 1:41 pm    Post subject: Gap seals | 
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				Buz,
 You might like to look into mylar gap seals for the
 flaps. i don't know the joint detail so they may not
 be applicable but offer a less flexible material for
 covering broader gaps and are commonly used in
 sailplane application where sealing is very important.
 Laurie
 Oz
 
 --- N1BZRich(at)aol.com wrote:
 
  	  | Quote: | 	 		   Hello again Brian,
      Super job!  Glad you took the time to provide 
  your inputs and thoughts.  
  I am sure all will enjoy your well written  report. 
  Since the list of pilots 
  that have flown a Lightning is still  relatively
  small (4), any information 
  will be helpful to Lightning  builders.  Nick and I
  have flown the Prototype - 
  Nick, Greg and you  have flown Greg's airplane - and
  Nick has made the one 
  flight on Earl's newest  Lightning.  The list will
  soon start to grow (Earl) and 
  hopefully each will  add their own thoughts to the
  available flight data.    
      Nick and I were discussing some additional
  "clean  up" ideas at OSH and I 
  am currently looking for some material for flap gap 
  seals.  There used to be 
  some clear tape available in the Pitts world that 
  we used for aileron gap 
  seals.  I will get enough for my airplane and  the
  Prototype if I can still find 
  it.  If the flap gap seals  work out, the next thing
  to try will be the same 
  on the aileron gaps.  The  idea on the flap gap
  seals is purely for a speed 
  increase (which  I feel certain they will do) but
  until we try them, I am not 
  sure how  they will affect flap effectiveness.  On
  the ailerons, the seals may 
  add a  little speed, but a bigger improvement may
  come from aileron 
  effectiveness /  lighter forces.  We shall see.  
      As to winglets, the entire design (size,
  airfoil,  shape, angle, etc) is 
  critical to be effective.  Most of the new high 
  performance sailplanes have 
  them.  Done right, they will help, done wrong,  they
  can detract in both 
  performance and handling.  Having said that,  I also
  like their look.  As a joke 
  while I was building 31BZ, I cut a pair  of winglets
  out of foam and taped them 
  to the wing tips just to get a reaction  out of the
  Shelbyville group.  Some 
  knew right away it was a joke, others  said they
  looked great and thought I 
  should glass them on.  So I hope  someone with the
  "aerodynamic smarts" to design 
  some for the Lightning will  take on that task and
  make it happen.  
      Got back from OSH yesterday with one stop in
  Ohio  for fuel and "pilot 
  comfort".  First leg block to block speed was 167.8
  mph  burning 5.9 gph.  
  Second leg was 169.1 mph burning 6.3 gph.  On this 
  leg I had to climb to 13,500 
  (from 7,500) over the mountains of West Virginia to 
  clear some buildups.  The 
  extra time to climb caused the extra fuel  burn. 
  Both going to and coming home 
  from OSH, I flew over Lake  Michigan, just as I used
  to do in my Bonanza.  I 
  am pretty confident in the  airplane and Jabiru
  engine combination, but should 
  something happen, the  nice glide ratio makes the
  Lake Michigan "dead zone" 
  much smaller or even non  existent if you go high
  enough.  I continue to be 
  pleased with 31BZ's speed  and economy.  And it is
  even faster in the winter.  
  Blue Skies,
  Buz
  
 
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		N1BZRich(at)aol.com Guest
 
 
 
 
 
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				 Posted: Wed Aug 02, 2006 6:17 pm    Post subject: Gap seals | 
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				Laurie,
      Right on!  I have been looking for one of0my0 old Soaring Society magazines to find an advertiser for the mylar seals. 0 As I recall, the sailplane community also has special tape to install the mylar0 and other special tape for wing to fuselage gaps as well.  I will do a0 google search to find a supplier.  By the way, what do you know about0 "turbulator" tape?  I may not be spelling that right.  Does the stuff0 really work?  Is there a formula for where to install it on the0 wings?  I would think it would look much better than VGs.
  Buz
 
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