Full-Scale Flying Surfboard

(last updated 2/19/2018)

I’ve had my small flying surfboard for many years.  It flies well and is a lot of fun.  I’ve been looking for new RC project to get psyched-up about and decided on making a full-scale version of the smaller model.  The current model is based on the plans for the 1st version of it found on Rcgroups.com.  This version measures 39 inches long (not including the motor & prop) and 12 inches at its widest point.

This is a work in progress and I will update the blog as the project unfolds.

Getting the dimensions of a Full-Scale Surfboard

The Shortboard

The shortboard is the classic surfboard born out of the so-called shortboard revolution, when Bob McTavish, Nat Young, and Dick Brewer radically transformed the 9’6” longboards into 6’6” surfboards.

Shortboards are the most popular surfboard template in the world right now. If you visit a popular surfing beach, you’ll find out that 95 percent of the surfers are riding boards between 5’5” and 6’5”.

A shortboard can be difficult to paddle, but it is easier to duck dive comparing with a longboard. Shortboards are also easier to turn and will respond quickly in critical moments and sections of the wave.

The most common fin setup used in shortboards is the thruster (tri-fin) system.

Design Considerations:

• By doubling the length and width of the board, the “wing” surface area will be quadrupled.  This will make greatly reduce the already low wing load provided I can keep the weight down and maintain structural integrity.
• I will maintain a tri-fin configuration except:
  • make the central fin a working rudder with a servo so as to improve directional control of the model.
  • position the central fin/rudder forward somewhat to clear the elevons.
  • make the outer 2 rudders taller and reinforced to protect the central rudder and its servo on landings.
• It will take 2 sheets of depron foam (for each layer) to span the full length of the board. Instead of doubling 6mm depron I will use 9mm depron
• Add carbon fiber strips to strengthen the board
• Size the motor to comfortably handle the increased board weight without adding excessive weight.
• Design the board to allow interchangeable “riders”.  So, for example, I could have one rider like the original flying surfer dude, and have a Snoopy, Mario, Full-figured girl, Cockroach, whatever …
• Maintaining scale dimensions will result in a narrower board than the version 1 Flying Surfer Dude.  This will likely decrease its stability.  Hopefully not too much.  If it destabilizes it to the point of requiring the addition of a Gyro, I will widen the design.  20.5 inches is about as wide as would be “allowed” if the goal is to maintain a scale size of 6 feet in length.

Version 4