GEAR DETERMINING THRUST AND COMPONENTS OF THRUST VECTOR OF ELECTRIC JET ENGINE AND PROCESS OF ITS TESTING Russian patent published in 2003 - IPC

FIELD: ground testing of space technology, namely of various types of electric jet engines and propulsion systems based on them. SUBSTANCE: gear includes thrust-measuring facility that carries rocker 1 placed horizontally and suspended from springy bar 2. Tested electric jet engine 7 is placed on one end of rocker. The other end of rocker carries equalizing mass 3 and reading device 8 that records torque, cables 9 and 10 supplying electric energy and pipe-lines 11 and 12 feeding working medium to electric jet engine. Gear is supplemented with rotary mechanism to rotate tested electric jet engine around its longitudinal geometric axis comprising rotation unit which includes drive 4 and reading unit 5 for control over angle of turn of tested electric jet engine. Gear also has assembly unit 6 which carries tested electric jet engine. Longitudinal geometric axis of mechanism for rotation of tested electric jet engine is positioned at angle with geometric axis of rocker. Process testing electric jet engine includes mounting of electric jet engine on thrust-measuring facility, balancing of thrust-measuring facility with electric jet engine put on it and conducting tests with measurement of thrust under operational parameters of electric jet engine. With switching on of electric jet engine and achievement of operational parameters by it electric jet engine is turned around its geometric axis. Angle of turn of electric jet engine is recorded simultaneously with measurement of thrust, thrust is determined as arithmetic mean of results of measurement of thrust in various positions of electric jet engine turned through 180 degrees. Side component of thrust vector is established as half-difference of results of measurement of thrust in same positions. Angle of deviation of thrust vector of electric jet engine is found by relation between thrust and side component. EFFECT: enhanced measurement results. 6 cl, 7 dwg