How do the wings join together to make it cantilever? The specs list
   width as 7 feet with wings folded. What does that mechanism look
   like?

   Steve Carlisle

   Not shown in the plans that I have. I have no idea. It might be like
   a sailplane where the spar fits into a socket.

   Paul Lamar

   The wing spar slides over the centre spar tube in a very tight fit .

   I have been looking for a wing fold system for it. Bede built it
   just so you could take the wing off rather than fold then others have
   come up with methods of sliding the wing off the centre spa with an
   internal leg holding the fuselage end of the wing up while you rotate
   the wing  90 degrees and fold back.  Then a contraption of some sort
   straddles the rear fuselage to support the wing folded. This way fuel
   and electrical lines don't need to be disconnected.

   Reminder to oneself never to visit an internet site and not download
   relevant info immediately .

   Speaking of that Paul I have downloaded the weight and balance graphs
   for which I thank you. Weight and balance is at the perimeter of my
   knowledge and as yet I don't have a copy of the plans but still just
   picking the damage apart.

   Having great difficulty getting in to the nuts holding the top door
   hinges on. Only a tiny opening in the box there and fuel and
   electrical wires run through it. Have bent a spanner to 90 degrees
   but still not sitting on the nuts . Plan b to be considered . Have to
   get the hinges off to remove the front side skin. Shame a large
   access door hadn't been built in either side for access to the back
   of the instrument panel. Some have done this.


   Mark Dillner

     Mark, I have some BD-4 Plans in a tube minus page 4 .    i do
     not know the vintage or Model. Yours for Shipping costs if you
     can use them. Page 4 is the fuselage side view.


   Virgil N. Salisbury


   Jim Bede had the original spars chemically milled to taper the ID as it
   travel to the tip to save weight.
   Best bet is to find an abandoned one and go from there all else is
   simple angle extrusion nut plates and gussets.

   The landing gear carry though box is the only "difficult" assembly and
   not by much.

   Aftermarket plans for the Aluminum wing is the way to go there two sets
   of plans to achieve that made the rounds both had followings and worked
   well. Pre GUI intranet... Late 80s early 90s..  Most did this to achieve
   a reliable wet wing tank an mitigate UV allot were parked outside.

   http://www.airbum.com/pireps/PirepBD4.html <http://www.airbum.com/pireps/PirepBD4.html>


   Matt  Naiva

   That is the first I heard about that chem milling being applied to the
   tube.
   That is real expensive. We used to chem mill Camaro bodies for racing.

   I have seen a turned down spar  tube on a BD17 at Sun N Fun.
   Now they appear to be drilling large holes in the front and back of the
   big tube.
   Which will work and add to the fuel capacity,

   Here is a FWF installation of the big turbo (same as the TTC) and an
   inter cooler for
   burning gasoline. It needs moving the motor mount in on the right side
   to clear
   the rad. The engine is rotated  90 degrees to get the intake and exhaust on
   the bottom where there is a lot more room in the cowl. It needs a try
   sump system.
   I have a lot of hours in this so pay attention if you every build one :-)

   It will make a gangbusters airplane with plenty of boost at 18,000 feet.
   Also no problem taking off over weight for long range or just hauling
   stuff. +/- 6 G[s while certified are only  +/- 4.5 Gs.

   The alt is on the back of the engine like my rotary powered RV4.
   Gives more room for the cool;ing system om the right side.

   It has an 18 inch spinner but a 16 will work.

   Paul Lamar


   Hello Virgil,

   I could certainly use the plans for reference and to check original
   construction. If you would advise me of what your costs would be and how
   I could pay I would be most grateful. Perhaps Pay Pal ?
   I'm based near Birmingham, England

   Just a note that I might go quiet for a few days as an old work mate
   from my days in Sydney  in the 70's has popped in during his visit to
   the UK. He has been following the adventures of his father who's Fairey
   Swordfish crash landed on a Norwegian Island whilst out looking for the
   Bismark during WW2. His Dad ended up in  Stalag 3 in Poland. An
   interesting story.

   Regards
   Mark Dillner

   Mark, Do you know Emon Hurley in Coventry?


   Paul Lamar

   That's the rotary expert that you mentioned before isn't it? I do plan to go and see him one day

   Mark Dillner


   Yes.

   Emon may have died but I think his sons are still running the biz.


   Paul Lamar


The old website seems inactive !

Steve Carlisle


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