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Tailwind-List Digest: 0 Msgs - 12/20/13

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fjmelick(at)aol.com
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Posted: Sat Dec 21, 2013 9:00 am Post subject: Tailwind-List Digest: 0 Msgs - 12/20/13

Can the W-10 fit the LSA category if I use an 85 hp continental the same as the original W-8?

   

  Is the stall speed of the w-10 wing lower than the w-80 wing?

   

  Thanks Fred M

  

  

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gerry.vandyk(at)shaw.ca
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Posted: Sat Dec 21, 2013 11:13 am Post subject: Tailwind-List Digest: 0 Msgs - 12/20/13

Hi  Fred.  The question has been asked here many times.  Keep in mind the  Tailwind is a serious hot rod, even with low power.  That's the way  Mr. Wittman designed airplanes, and the legacy is celebrated by the  this group's members.  It's a little like asking if you can make a Shelby  Cobra into a slow car.

  

 Have a  look at other light sport airplanes that push up to the full 1320 lb weight  limit.  They're typically around 130 square feet of wing area, the W-10 is  100 square feet.  My quick calculations show that it would have to be  built somewhere around 950 pounds max take weight to make the maximum stall  speed.  That's a big ask with the existing airplane.

  

 You  could re-work the design with a larger wing, a different airfoil, lighter wing  without plywood sheeting, (dual wing struts needed) etc.  Then again it's  already been done for you.  Wittman's earlier design the Buttercup is  already LSA compliant.  Earl Luce sells the plans.

 http://luceair.com/replica_buttercup.html

  

 The  lines aren't quite the same as the Tailwind, but you could easily make the same  changes to the lower longerons, top forward tubes and cowl that Jim Clement has  made.  His Buttercup looks a great deal like a  Tailwind.

 http://groups.yahoo.com/neo/groups/TailwindForum/conversations/messages/56532

  

 For  the most part, those who have asked your question here before appear to have no  interest in doing a Buttercup but it's by far the best way to go.  It's  highly impractical to make the Tailwind stall slow enough and keep it's top  speed within the regs.  Speed is determined by the airframe much more than  the horsepower.

  

 I hope  this helps your deliberations.

 Gerry

  

 [quote]   

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tailwind222(at)yahoo.com
Guest

Posted: Sat Dec 21, 2013 11:45 am Post subject: Tailwind-List Digest: 0 Msgs - 12/20/13

The stall speed is a little slower with the W 10 wing, but not even close to the  landing speed needed to qualify.  The Buttercup  can qualify.  George

 

 

     On Saturday, December 21, 2013 12:18 PM, Gerry van Dyk <gerry.vandyk(at)shaw.ca> wrote:

  

      Message     Hi  Fred.  The question has been asked here many times.  Keep in mind the  Tailwind is a serious hot rod, even with low power.  That's the way  Mr. Wittman designed airplanes, and the legacy is celebrated by the  this group's members.  It's a little like asking if you can make a Shelby  Cobra into a slow car.

  

 Have a  look at other light sport airplanes that push up to the full 1320 lb weight  limit.  They're typically around 130 square feet of wing area, the W-10 is  100 square feet.  My quick calculations�show that it would have to be  built somewhere around 950 pounds max take weight to make the maximum stall  speed.  That's a big ask with the existing airplane.

  

 You  could re-work the design with a larger wing, a different airfoil, lighter wing  without plywood sheeting, (dual wing struts needed) etc.  Then again it's  already been done for you.  Wittman's earlier design the Buttercup is  already LSA compliant.  Earl Luce sells the plans.

 http://luceair.com/replica_buttercup.html

  

 The  lines aren't quite the same as the Tailwind, but you could easily make the same  changes to the lower longerons, top forward tubes and cowl that Jim Clement has  made.  His Buttercup looks a great deal like a  Tailwind.

 http://groups.yahoo.com/neo/groups/TailwindForum/conversations/messages/56532

  

 For  the most part, those who have asked your question here before appear to have no  interest in doing a Buttercup but it's by far the best way to go.  It's  highly impractical to make the Tailwind stall slow enough and keep it's top  speed within the regs.  Speed is determined by the airframe much more than  the horsepower.

  

 I hope  this helps your deliberations.

 Gerry

  

 [quote]   

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