This company was known as Thermo-Jet Standard Inc, of Kerrville, Texas, a manufacturer of valveless pulsejets based on the “Chinese” pulsejets.

-They were made for use in “pilotless remote controlled vehicles” as UAVs were formerly known.

-As with all these engines, the frequency of the explosions is in accordance with the geometry, shape and dimensions of the combustion chamber and the exhaust nozzle.

“J3-200 diagram”

-The designs were by John A. Melenric. See.

-Being of great simplicity and lightness, improvements were incorporated.

-The operational models were the J10-300 with 55 pounds of thrust.

“Thermojet J10-300”

“Thermojet J8-200”

“Thermojet J7-300”

-Below we see the J13-200, with 90 lbf thrust.

“Thermojet L-13-200”

“Another view of the J13-200”

-Another notable design by Melenric is the one below, with a booster in the main nozzle and a fuel heater around the nozzle.

“Melenric Project”

-And finally a UAV with a Chinese-type engine, possibly from Thermojet itself, taken from a report by Bruno Orgolec, an expert on pulsejets.

“UAV with valveless pulsejet”