Based on series of ground operations of a newly designed micro turbojet engine

this paper presented the establishment of engine structure

process of test rig

configurations of measure system

confirmation of engine running plan

and put stress on analyzing the reasons of all the faulty phenomena met in engine operations and their solutions.These phenomena include ignition reliability

flame localization behind the nozzle too much

speed hang-up

rubbing faults between rotor and stator

cracks of welding sews of wing fender in the nozzle

failure of bearing in the side of turbine because of thermal instability

engine surge and debugging of electronic-control programs.The ground operation results show that reducing thermal load of the bearing in the side of turbine

improving mechanical characteristics of the compressor impeller's materials made in China

and promoting manufacturing level are main missions to be finished so far in the design of micro turbojet engine

and other faults stated in the paper can be overcome by appropriate methods.