Turbine Turboshaft Engine JetCat SPT5-H incl. kerosene start

The JetCat SPT-H variants (SPT15-RX-H, SPT10-RX-H, SPT5-H) are used in helicopter applications.
ECU software developed specially for this application allows free programming of up to three main rotor speeds, which can then be switched on the transmitter side with a 3-position switch.
The electronic control of both shafts ensures that the rotor speed stays constant even during load changes.

Model helicopters no longer have to do without the advantages of turbine technology.
In the JetCat SPT turboprop engines, high power reserves have been achieved in a high-tech package.
The basic structure and operation largely correspond to the engines used in manned aviation.
The principle is easy to understand.
It only makes sense to convert the high engine power into usable shaft power. However, this is not possible at very high speeds.
The necessary reduction takes place in 2 stages.
First through a gas drive, then through a gear drive.
That is, during operation the gas jet of the so-called core engine drives a turbine wheel seated on a second shaft. This second shaft is mechanically completely independent of the rotor of the basic engine and receives its driving force solely from the kinetic energy of the exhaust gas jet.
The second shaft drives directly into a gearbox suited to high speeds, which reduces the speed to suitable propeller speeds.
Completely new is also the electronic control, which processes and regulates both the primary and the secondary shaft speed.
The pilot can concentrate fully on flying, and the complex engine management is entirely electronic.