Builder of small model-turbines that has been increasing the power of its engines as it is in the case of the two turbines that are presented:

-These engines are also known as "Wren Turbines". They are the Mantis H150R and H250 models.

“H-250 with 250 lbf of thrust”

“H-150R with free turbine for propeller”

“H-250A schematic drawing”

From Appendix 9: This company makes small turbine engines for use on motor-gliders and other light flying devices, such as drones, etc.

"A motor-glider with the small Jet Beetle installed and two others on both sides, the medium one and the largest one"

-The little one is the H-90 model that bears the name of “Tarantula”

“Tarantula”

“The H-160, also known as Locust (replaces the previous H-150)”

“The H-250 is called Mantis”