Copy
March Newsletter2014
View this email in your browser
Bede News March 2015

GREETINGS ALL BD-4 ENTHUSIASTS!
 

BD-22L Press Release
 


 
Bedecorp is pleased to announce that the New BD-22 Light Sport has begun Phase I of our Flight Testing Program at our Ft Pierce Florida facility. Tim Becker, Engineer with Bedecorp, believes the BD-22L will meet or exceed all of our design expectations. The BD-22L is the big brother of the BD-17L, which incorporates the same bonded honeycomb fuselage. (The fuselage can be bonded in 20 minutes or less!) With an expected build time of roughly 400 hours and the availability of our Builder Assist Facility, if desired, we anticipate the BD-22L will be a favorite among light sport enthusiasts.

Come see the BD-22L debut at Sun-N-Fun 2015 at Booth# LP-56.
 
For more information:
Call Eric Ingraham at 772-284-4227 
or visit
 www.jimbede.com


From The Workbench of Eric Ingraham

Many thanks to those of who responded to our request for information. Slowly but surely I'm bringing our database up to speed and with  a bit more help from you guys I can get it done. 

There are approximately 44 deregistered BD-4's around the country. I'm trying to find out where they went. Were they put out to pasture because their owners lost their medicals?  Were they parted out, sold as scrap, transferred to a new owner?

You get the idea. If you  were the prior owner or, perhaps a new owner please help us out by completing the contact card and drop us a quick note to update the status.

Perhaps we can help you get your plane back in the air or help you sell it....... Thanks, Eric

Please take a minute to complete this form on our link below:
 

CLICK HERE TO UPDATE YOUR PROFILE

(This information will not be shared with anyone!)


BD-4B Builder Story
 

Persistence. . . As anyone who has ever built a plane can tell you, this is exactly what it takes! I would have to say that Bob Cousar or North Captiva Island, Florida deserves the persistence of the year, perhaps the decade, award in building his BD-4B!

Bob, a retired WWII P-47 Pilot, turned island minister had acquired his project, SN 245, from Carlton Murphy   of Rockville MD in 1978.
This island minister, pilot, could use some help to get off the ground and complete his dream of taking to the air once more.
 
He currently has a dynafocal mount for an 0-360. He sold the engine a few years back and acquired a Lycoming  O-320, SN 2743-27. He is in need of a conical mount for the new engine..

If you have one to trade, sell or donate please contact Eric at BD Aero-Southeast 772-284-4227.


Let's see if we can't help this retired fighter jock get back in the air.....
   







From The Workbench of Jim Bede Sr.
 
From the very beginning we had ”self-made experts” analyze the BD-4 fuselage structure just because it is different than most. When I designed the fuselage structure there were a lot of factors to consider, obviously the strength of the structure was the most important. Since the BD-4 was truly the first home built kit aircraft. I was not sure how close a builder would follow the drawings. I wanted the structured to be nearly foolproof for construction. For example, there are many areas where we had more screws than would be required to just meet the structure loads. It is so foolproof that even an aeronautical engineer could build the first one. It is nearly impossible for example for a builder do something to the wing spar that would prevent it from being safe. 
   
With regards to the fuselage structure; I did all the calculations based upon the fuselage angles caring all of the loads that would be required for certification of FAR part 23. This means that the fuselage could be covered in fabric. But when the BD-4 was designed there are a lot of fabric covered aircraft, such as Stinson, that the fabric on the wings were replaced which metal skin. Owners did not want to recover their aircraft every so many years. I decided that we would put metal skin on the aircraft so builder would not have to recover. Yes it did add weight and yes it did add strength. The amount of weight increase is not significant. The added strength is essentially “statically impossible” to calculate. When the load is put in the fuselage by the horizontal tail or vertical fin the load is carried by the angle structure. This structure will stretch or shrink a small amount. When you add metal skin to this frame some of the load is transferred to the skin. How much load depends on the stiffness of the truss assembly and the stiffness of the skin. The actual amount can only be calculated with Finite Element computers. There was no such thing when I design the BD-4. My reasoning was if the loads can be carried by the truss assembly itself than adding metal skin can only make it stronger. Just how much stronger I could not determine but that is not a reason not to use the metal skin.

There are certain parts of the fuselage truss assembly they cannot be calculated analytically using the truss pin method. But I determined that if the structure is strong enough to carry the maximum load by itself and by adding a few more angles prevented me from doing the classical calculations. That didn't bother me because I knew it only became stronger. Early in the program some of the people at Beech Aircraft were intriguing the BD-4 and they hired the Rawdon Brothers Aircraft.   They asked them to calculate the structural strength of the BD-4 fuselage. Later that this group went back to Beech Aircraft and said we cannot calculate the loads through the typical method although we  did not find any weak areas.

When we built the very first prototype we perform static load test on the ground.  We took the maximum loads for the various areas of the fuselage and loaded up with sandbags and lead weights. Most of time we took it to the maximum loaded but not beyond that would cause total collapse of the structure. We were totally satisfied that the bear fuselage structure by itself could carry the required loads. I think it's pretty silly to think that we decided to design things the way did to sell more kits. When someone wanted to build the BD-4 they never asked us how strong the fuselage was. Definitely the BD-4 fuselage could meet FAA loads and be lighter, but to make the structure lighter and reduce the margin of safety is a poor design.  An aircraft designs based upon a variety of compromises. Weight reduction is one of them. But the BD-4 over the years now is proven that the compromises made in that design has result in outstanding performance.
~Jim Bede Sr.




AIRSHOW SCHEDULE as of MARCH 2015:

Sun N Fun Int'l Fly-In & Expo : April 21-26, 2015  Booth # LP-56
We will have our BD-17L and BD-22L there!

Oshkosh EAA : July 20-26, 2015 Booth # 628





 

www.jimbede.com

Bedecorp - Headquarters
6440 Norwalk Road Unit G
Medina, OH 44256
330-239-1468

Bede Aero Southeast - Florida Hangar / Build Center
3131 Jet Center Terrace
Fort Pierce, FL 34946
772-801-9448

 
Website
Website
Facebook
Facebook
Twitter
Twitter