GB Hobby Electronics 

The TPC offers a very smooth start ramping and repeatable idle control, which allow for landings to be made with your turbine running. Battery voltage is taken into account while controlling the fuel pump, as well as loading on the pump. Therefore as the supply battery discharges, the TPC will compensate for this. Fewer field charges will be required. This allows for repeatable and consistent idle speeds.

The TPC is a microprocessor-based unit that interprets a R/C signal and generates a pump control voltage. The R/C pulse width, minimum and maximum pump limits and ramping rate are user settable. In the event of a user increasing his R/C throttle travel without re-calibrating the TPC, the TPC will not allow more fuel to pumped to the turbine - this can only be done via the push button adjustment.

Two LED's provide indication when programming the various parameters and general running of the unit. Adjustments are made with two miniature push button switches.

Start up is done using a ramp function, starting at a very low speed and gradually increasing, thus reducing the likelihood of hot starts. Ramping during normal use (idle-max-idle) is dependent on the user-adjusted settings.

The Turbine Pump Controller will shut down in the event of a signal loss from the R/C receiver. For safety reasons, restart is only possible after the controller has been switched off and then on again.

The Turbine Pump Controller is supplied with a user input to which a pressure switch can be connected. This switch is usually set to operate at around 5 kPa falling pressure. Once armed (by starting your turbine and having a pressure greater than 5 kPa for 5 seconds) the TPC will shut off the fuel pump in the event of the pressure falling below 5 kPa. (This would occur in the event of a flame out or seizure). This prevents flooding your turbine with fuel (normally the pilot has his hands full with trying to land his aircraft safely, and does not have time to worry about moving throttle trim and stick to the shutdown position in order to stop the fuel pump).

Supply voltage for the TPU is 2 - 10 volts. Normally a 6-cell Ni-Cd pack is used due to pump requirements, however with the use of the newer (lower voltage) pumps, 3 or 4 cells can be used. All up weight - 65g.
 
 

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