On January 10, 2006, about 0900 Pacific standard time, an experimental category Huntington KIS, N506RJ, experienced a partial loss of engine power shortly after takeoff and made an forced landing in a field 1 mile west of the Camarillo Airport, Camarillo, California. The commercial pilot operated the airplane under the provisions of 14 CFR Part 91. The pilot was seriously injured and the airplane was substantially damaged. Visual meteorological conditions prevailed, and no flight plan had been filed. The pilot stated to the National Transportation Safety Board investigator that he was taking the newly constructed airplane for its second flight. The engine that was installed in the airplane was a automotive Subaru EJ20. He took off from runway 26 and was climbing at 90 mph. Everything seemed normal and then he noticed that his airspeed was 60 mph. There were no pops or abnormal engine sounds associated with the decrease in airspeed. The pilot immediately manipulated the throttle to ensure it was fully opened, he then turned the ignition switch off and on in an attempt to reset the engine control. Both actions failed to regain full power of the engine. He notified the tower that he had lost engine power. He decided to land in a field that was off the end of the runway. He was flying at 60 mph and had a rate of descent of a couple of hundred feet per minute. He made a forced landing into the field and was assisted by emergency responders shortly afterwards. The pilot said that the Subaru engine has a reduced power mode intended to operate the engine at a substantially reduced power output if an engine problem was detected by the engine control system. He thinks that the engine switched to this low power mode shortly after takeoff. The method he knew of to correct this situation was to turn the ignition off then back on, this should have cleared the fault and allow the engine to resume normal power output.