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EAA Experimenter

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Mystery Plane

Tube-and-Rag Construction, Unbeatable Performance

By Anthony J. Liberatore, EAA 99484, aliberatore@gmx.com

Dave Williams’ Delta in the Homebuilt area at EAA AirVenture 2008 – a stunning example

This month’s Mystery Plane is a part of EAA’s early heritage dating back to when it first flew in 1962. With its double-delta configuration and a passenger compartment turtle deck that contributes up to 30 percent of the aircraft’s lift, it stands alone as the only homebuilt with this configuration. Another unique feature is that it’s a four-seat homebuilt with the pilot sitting alone up front with all three passengers in the rear.

The Dyke JD-2 Delta, designed by John Dyke of Fairborn, Ohio, was featured in a 2009 issue of EAA’s Experimenter. If the aforementioned details aren’t enough innovation, the Dyke Delta can be easily folded up and towed behind an automobile. With a wingspan of 22 feet, 3 inches, and folding outer wing panels that fit over the center section, the JD-2 possesses a road legal width of 7 feet, 5 inches, making it legal for towing on any U.S. street or highway. Although the JD-2 doesn’t fall in line with the light-sport aircraft specifications, it’s a very economical aircraft to build, own, and operate.


The towing of the Dyke could be done on a trailer, but it doesn’t have to be, since its torsion bar type tricycle retractable landing gear is roadworthy. In fact, John Dyke has literally towed his JD-2 thousands of miles behind his car over his nearly 50 years of flying N555A. That period of flying is a milestone.

If you’re interested in the JD-2, consider being in attendance at EAA AirVenture Oshkosh 2011 as the Dyke Delta community plans on celebrating this half a century of flight of this aircraft by having as many Deltas in attendance as possible.




The framework on display at the Dyke dinner, EAA AirVenture 2008


Dyke Delta plans are available from:
John Dyke
2840 Old Yellow Spring Road
Fairborn, OH 45324
Phone: 937-430-8298

Larger view

Web Resources
The primary web resource for Dyke Delta builders, fliers, and enthusiasts is the Dyke Delta Yahoo! Group which can be found at http://groups.yahoo.com/group/DykeDelta.


  • Number of Seats: 4
  • Length: 19 feet
  • Wingspan: 22 feet, 3 inches
  • Height: 5 feet, 6 inches
  • Wing area: 173 feet²
  • Empty weight: 1,060 pounds
  • Gross weight: 1,980 pounds
  • Powerplant: One Lycoming O-360, 180 hp
  • Maximum speed: 200 mph (322 kilometers/hour)
  • Cruise speed: 170 mph (274 kilometers/hour)
  • Range: 870 miles (1,400 kilometers)
  • Service ceiling: 14,500 feet (4,420 meters)


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