REFLECTOR: Brazil wings - 10 years later

[Scott Baker]

Hello Reiff,
You are correct that the first set of "Brazilian wings" had problems with winglet and rudder flutter.  Brendan O'Riordan (CFI and first flight pilot for "Bob-1", a XL-FG model with the first set of Brazilian made wings) experienced winglet flutter that resulted in a forced/off-airport landing.  Brendan, than the Lord, was okay and suffered only bruises as a result of the crash.  Following this several aeronautical engineers looked at the Brazilian wing design.  The fix-it was a newly designed winglet and rudder.  Important note: ALLl Velocity customers with the "Brazilian wings" have the new winglets and rudders.  The new winglets and rudders have proven to be structurally and aerodynamically fine.  No problems or issues whatsoever.  I guess that 16 or so "Brazilian wings' are flying today.  If memory serves, 20-Velocity customers have "Brazilian wings".  The Velocity factory has one set in stock that is reserved for the development of a twin-Velocity.
Scott B.

  ----- Original Message ----- 
  From: Reiff Lorenz 
  To: reflector at tvbf.org 
  Sent: Monday, June 06, 2011 10:17 AM
  Subject: REFLECTOR: Brazil wings - 10 years later


   

  I am considering buying a Velocity XL RG project (reportedly just 10% complete) from 2000. The kit comes with the Brazilian fast-built wings that use ribs instead of foam cores. According to the owner/builder:

   

  >>>The Brazilian wings are rib-and-spar based.  They are about 10% lighter than the foam core wings.  Mine are complete, ready to be primed and painted.   I have a degree in Aeronautical engineering and if I were to order the kit again I would order the Brazilian wings again - wait until you see the craftsmanship!<<<

   

  I've read in Velocity Views about the first failed test flight, and subsequent re-engineering and fix of the winglet flutter problem. The Brazilian wings were reportedly stronger and more rigid, but I know some builders still opted for foam-core wings back when there was a choice. I've searched the Reflector and found no indication of long-term problems, but also no reports of success with these wings.

   

  Can anyone provide guidance for a future builder? Anyone actually flying with these wings?

   

  Thanks in advance for any help!

   

  Reiff Lorenz

   



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