Subject: BD4 wing fold.
From: paul lamar
Date: 6/2/2017, 8:52 AM
To: A10-Me-Earthlink



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


Here is the page from the early plans on the wing fold.

Paul Lamar

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