HISTORY OF FLIGHTOn July 11, 2012, about 1240 mountain standard time (MST), an experimental Bunch Cozy-Canard III, N718JT, impacted terrain during takeoff at Winslow, Arizona. The owner/pilot was operating the airplane under the provisions of 14 Code of Federal Regulations (CFR) Part 91. The private pilot sustained serious injuries, and the passenger was fatally injured; the airplane sustained substantial damage by impact forces. The cross-country personal flight was departing Winslow-Lindbergh Regional Airport (INW), Winslow, about 1240, with an unconfirmed destination. Visual meteorological conditions prevailed, and no flight plan had been filed. The airplane landed at INW about 1100 MST; after the pilot refueled the airplane he inquired from the airport fixed base operator (FBO) personnel about finding a mechanic. The pilot stated that the engine was running rough and that he needed to remove and check the spark plugs. The pilot was advised that there were no mechanics based at Winslow but that one could be called from Flagstaff, Arizona. The pilot indicated he was going to try and "clear" the engine, and then would call the mechanic. About 1 1/2 hours later, witnesses saw the accident airplane departing INW using runway 29. As the airplane approached the departure end of runway 29 it descended and hit an off airport road and cartwheeled into a dirt field. Inspectors from the Federal Aviation Administration (FAA) responded to the accident site. After documenting the wreckage it was recovered for further examination. The FAA accident coordinator interviewed the pilot. The pilot reported that he did have a rough running engine, but was able to clear the engine prior to takeoff. He also stated there were no other maintenance issues related to the engine or flight controls. The pilot reported that during takeoff, the airplane became airborne with 3,000 feet of runway remaining. When the airplane was 25-40 feet above the ground the pilot experienced a nose down pull on the control stick; the pilot pulled back on the control stick to counter the nose drop. The pilot was able to level the airplane and established a 200-foot-per-minute climb. As he approached 75 feet there was another pitching down event, which was about a 30-45 degrees nose down attitude. The pilot recalled that the airplane was traveling about 95 miles per hour indicated airspeed at the time. The pilot again pulled back on the control stick but was unable to recover before the airplane impacted the ground. AIRCRAFT INFORMATIONThe airplane was an experimental-Matthew B Bunch, Model Cozy Canard III, serial number- BUNCH 1. A review of the airplane's logbooks revealed the airplane had a total airframe time of 259.1 hours at the last conditional inspection. The logbooks contained an entry for the conditional inspection dated November 7, 2011. The Hobbs hour meter read 259.1 at the last inspection. The Hobbs hour meter read 341.4 at the accident site. Fueling records at INW established that the airplane was last fueled on July 11, 2012, at 1107 MST, with the addition of 23.8 gallons of 100LL-octane aviation fuel. Examination of the maintenance and flight department records revealed no unresolved maintenance discrepancies against the airplane prior to departure. The maximum gross weight for the airplane per the Cozy pilot operating handbook is 1,800 pounds. The weight of the airplane at takeoff was calculated by the NTSB investigator-in-charge using the empty weight of the airplane as determined by the May 14, 2011, weight and balance revision, the weight of the occupants, 46.7 gallons of fuel, and 100 pounds of baggage. The calculated gross weight at the time of departure was about 1,852.0 pounds and the airplane's center of gravity was 99.6 inches, which is inside the forward limit of the weight and balance envelope. METEOROLOGICAL INFORMATIONA review of recorded weather data from the INW automated weather observation station revealed at 1256 MST conditions were; wind 360 degrees at 8 knots, temperature 34 degrees Celsius, dew point 8 degrees Celsius, and an altimeter setting of 30.13 inches of Mercury. Using the reported weather conditions and field elevation, the calculated density altitude was about 8,048 feet. AIRPORT INFORMATIONThe airplane was an experimental-Matthew B Bunch, Model Cozy Canard III, serial number- BUNCH 1. A review of the airplane's logbooks revealed the airplane had a total airframe time of 259.1 hours at the last conditional inspection. The logbooks contained an entry for the conditional inspection dated November 7, 2011. The Hobbs hour meter read 259.1 at the last inspection. The Hobbs hour meter read 341.4 at the accident site. Fueling records at INW established that the airplane was last fueled on July 11, 2012, at 1107 MST, with the addition of 23.8 gallons of 100LL-octane aviation fuel. Examination of the maintenance and flight department records revealed no unresolved maintenance discrepancies against the airplane prior to departure. The maximum gross weight for the airplane per the Cozy pilot operating handbook is 1,800 pounds. The weight of the airplane at takeoff was calculated by the NTSB investigator-in-charge using the empty weight of the airplane as determined by the May 14, 2011, weight and balance revision, the weight of the occupants, 46.7 gallons of fuel, and 100 pounds of baggage. The calculated gross weight at the time of departure was about 1,852.0 pounds and the airplane's center of gravity was 99.6 inches, which is inside the forward limit of the weight and balance envelope. WRECKAGE AND IMPACT INFORMATIONInvestigators examined the wreckage at the accident scene. The first identified point of contact (FIPC) was a ground scar on Coopertown Road, which is an east-west road that is just north of the airport boundary fence line. The debris path was along a magnetic heading of 320 degrees. The orientation of the fuselage was inverted facing southeast. ADDITIONAL INFORMATIONAccording to FAA Advisory Circular AC 20-27F, Certification and Operation of Amateur-Built Aircraft, "Amateur builders are free to develop their own designs or build from existing designs. We do not approve these designs and it would be impractical to develop design standards for the wide variety of design configurations, created by designers, kit manufacturers, and amateur builders." The pilot operator did not submit a Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2). TESTS AND RESEARCHExamination of the recovered airframe and engine was conducted on July 24, 2012, at the facilities of Air Transport, Inc., Phoenix, Arizona. No evidence of pre-impact mechanical malfunction was noted during the examination of the recovered airframe and engine that would preclude normal operation. A Garmin nuvi 200w portable GPS unit was recovered at the accident site. The GPS unit was sent to the NTSB vehicle recorder lab in Washington, D.C., for download. Data was extracted from the unit but contained no tracking information. A copy of the GPS factual report is attached to the docket.