Symphony

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<= Cameron Smith (SE USA)

Mike Harrison (Central USA) =>

     

Key Parameters: Span= 75", Length=2m, Wing Area=950 sq. in., Width=7.25", Height=14.5"

The November and January covers of the K-Factor have included Symphonies.  These are planes to be proud of. 

The first E-Symphony has been completed and is flying and well under legal weight.  Goto RCU and search for Symphony.

Last Updated with new pictures and text 2/18/05 with build along shots

<==The first 4 Symphony kits to fly belong to (from bottom to top) Lance Van Nostrand, Don Ramsey, Ed Deaver, Mike Harrison.

Brief flying report: All the control surfaces are very effective.  about 12 degrees throw on the elevator and aileron.  Rudder authority is excellent and I've cut my max throw down to only 20 degrees.  I really am surprised at the rudder control.  Knife edge loops are easy.  Mix is almost nil.  Some are flying with no mix.  The plane is very neutral.  I have a little up elevator with right rudder, but no mix with left rudder.  No aileron mix at all and it flat turns great. 

For a 3-D animated model that you can examine from every angle, download this self contained program.  Be warned that it is 2,893KB.  I hope this works. I've tried posting it before with no luck.  My hosting provider may not allow the posting of executables.  

Here's the link: Symphony Animation.

I'm very excited to share with you the results of months and months of research and design work.  We have a new airplane design that we hope raises the bar for everyone.  It is the Symphony.  It was completely rendered in 3-D CAD allowing the plug to be CNC machined.  Yes, by designing in 3-D this plane will be perfectly symmetrical and the fit of the parts perfect.  Even though it is CAD designed, it still has the flowing analog lines that make Mike Harrison's designs famous.

We have been fortunate to have some of the top skilled professionals in the USA work on this project.  I'm not sure if they all want their names published here, but I will say that we couldn't have completed such a difficult design in 3-D CAD without the consulting help of the noted  designer Paul Salvador and zxys.com.  Just check out his site if you want to see what a real pro can do.  Kevin Krebs Consulting lead the CAD effort and the dedication of principal Kevin got us through the modeling of a very complex plane.  Mike Harrison's designing skills and total support have been the driving force.  

As you can see, a team of dedicated people, each contributing their unique skills make this project successful.  The Symphony name is completely apropos.

I don't believe any kit manufacturer has done a better job of CAD designing the complex aesthetic curves and lines into a plane with proven lineage.  Most CAD design is kept simple because of the enormous complexity in drawing "french curve radii".  This design started with artistic drawings from Mike Harrison, and received his approval each step of the way.  Many gorgeous planes were produced along the way, but only the one that matched what was in Mike's head was accepted.

Here's some early 3-D renderings where we used a chrome surface to look for imperfections.  You may see some, but these have all been eliminated now.

The Cad model                                        The real thing

What's new in the Symphony?

The difference between the Rhapsody and Aries was minor, but this time several significant steps were made.  As has been proven with the Smaragd and its copies, higher wing loading helps the FAI level flier.  The Symphony is designed for FAI and Masters primarily.

Some other changes include: integrated cheeks, a wider chin cowl, integrated fixed gear mounting surfaces, better stiffness, a larger canopy opening, and more stiffness producing curves. 

To assist the builder a whole lot of scribe lines and locater dots are placed in perfect location by the CAD program.  Therefore, you don't need to do much measuring or accurate marking to get stabs, wings and adjusters straight.  I used the locator marks so I didn't have to jig up the fuse, even to cut out the stab.  Just  cut on the lines.  Here are some interesting shots of my plane in the early building stages.

The clean air laminar flow concept, that is important for control consistency over a wide speed envelope has been retained by making the fuse wider, taller and by using a new wing airfoil.

 

1/16 balsa false floor with 3/4 oz glass and a CF strip is 1 oz. My 1/8" lite ply firewall weighs 36g and cost $2
 
Art's 1/16" balsa tunnel formed over 3" PVC.  Notice the small formers used to hold the shape.  They are made from two layers of 1/16" balsa CA'd at cross grain.  

The light shows off the curves in the fuse above

No chin cowl, but starting to look like a plane.  The curves really set this plane off from others, and it contributes to stiffness.

 

Wow!!