Burt Rutan once said that Solitaire is the airframe he most regrets bringing to flying article.  For me, that is definitely the Dynamics.

Submitted literally as pencil drawings, they were converted to class A watertight surfaces intended at the start to evolve into a workable DS airframe, but the customer was rabidly Kardashian, maniacal and myopic to the point of wanting the machined wing plugs to match the geometry of hotwired panels.  Airfoil choice of the RK40 was not correct, as was the idea that a single drawing could be scaled to a successful model of any size.  Though some optimization and streamlining were applied; comparatively speaking to my aggregate collection of work, rates 1.5 out of 10.

Publicly posting all work was not worth compensation as it did not take very long to produce,  The Dynamic 40, 60 and 80 evolved into mediocre airframes.

A 160″ span version using unauthorized, modified data from Dirk Pflug was built 5 times, and crashed to full write off 5 times.  The customer presented the airframe to Scaled Composites, but with absolutely no technical knowledge nor any ability to answer any questions whatsoever, attendees left the presentation early assuming the customer was actually in fact just pan handling for a job.

A 130″ span was developed using the same unauthorized airfoil data and at that point I contacted a lawyer to look at protection options.  So awkward is the airframe that it becomes ever more uncontrollable as it is forced into high speeds.  It is my understanding one crashed onto private property at speed, nearly missing a house.  The Dynamic 60 and 80 are garage sale, last choice options, and the 130 wholly hands off.  I contacted Aloft Hobbies suggesting that if they have any 130’s in stock, they should be sold only after signing a notarized liability waiver.

As with lessons learned and posted here, this lesson is far and away most important; choose your customers with care.  If the customer wants junk that will in no way pass any bar of excellence; your own above all else, refuse the commission no matter how excited you are to be engaged.  It’s far better to decline the work than to see it through to perform to mediocre/poor results and equally mediocre/poor reviews.  One genuine clue is to look into the targeted community.  If you see people consuming the work then selling it after a short time, that is a clear sign of failure.

Free part files in iges format with a modern version coming shortly.  Other formats available on request.  Though a Salvation Army find, the Dynamic has a feature that busts many, many long standing assumptions.  Can you guess what it is?