Onboard Generator System Upgrade

A complete 80W onboard generator system can be optionally installed on Penguin B airframe if ordered with 28cc engine and servo package.

Key Features

System consists of a Generator Power Unit (GPU) and a belt driven industrial grade generator capable of supplying 80W continuous power during cruise.

Generator Power Unit is designed to provide onboard dual voltage regulated power supply of 6 and 12 Volts. Despite small size, power unit offers outstanding efficiency as well as unique features such as the ability to monitor load, battery current, engine rpm, generator and battery voltage through serial communication- as result all power distribution parameters can be transmitted to the ground station and monitored during the flight.

Integrated Lithium Polymer charger is used for the backup battery, which is switched on during the pre-flight checks, power peaks or in the event of the engine failure.

Power unit is packed in a sealed aluminum enclosure and fitted with the high-end industrial push-pull connectors.
  • Ready to run onboard generator system
  • 80 W continuous load
  • 6V and 12V output
  • Short circuit protection
  • 3 cell Lithium Polymer integrated charger
  • External power connection
  • Integrated current sensors
  • TTL serial output

Product Specification

Engine Specifications:

Engine model 3W 28i or 28 CS, two stroke
Power 3.35 hp (28i) or 3.55 hp (28 CS)
Capacity 28 cc
Speed range 1500-8500 rpm
Oil / Gasoline Ratio 1:50 / 2% mix
Recommended 2-bladed Propellers 16x10, 18x8, 18x10, 20x8
Recommended 3-bladed Propellers 16x8, 16x10
Engine weight ( including ignition) 1.2 kg
Muffler Not included

Electrical Specifications:
Generator type Brushed
Generator voltage range 13 – 50 VDC
External power supply voltage range 13 – 50 VDC
Battery Type 3 cells Li-Polymer (not included)           
Battery Voltage 12.6 V
Maximum battery charging current 2 A
Maximum continuous generator current 3.5 A
Maximum continuous battery current 8 A
Maximum continuous external power current 8 A
Output voltage 6 V and 12 V
Maximum output voltage ripple 50 mV @6V 50 mV@12V
Continuous load current, 6 Volt output 1,2 5 A
Continuous load current, 12 Volt output 1,2 5 A
Maximum GPU efficiency 90 %
Maximum total generator system efficiency 75 %
Maximum peak load current 10 A for 10 seconds
No load GPU current 110 mA
Tachometer range 1000-9000 rpm
Tachometer accuracy 200 rpm
Current sensor range 0 to 10 A
Current sensor accuracy 0.2 A
Voltage sensor accuracy 0.1 V
Serial Communication 5V TTL

Generator System Mechanical Specifications:

GPU Dimensions 59.4 x 115.8 x 32.4 mm
GPU Weight ~190 grams
Complete Onboard Generator System weight  ~500 grams
Maximum GPU enclosure temperature 70°C
Environmental protection IP 64 standard, IP 68 on request
Operating temperature - 40°C to +50°C 2
Electrical connectors Fischer 104 Series push-pull connector

1 Generator continuous current must not exceed 3.5 A
2 Enclosure temperature must not exceed 70 °C , additional cooling may be required

Maximum generator power output

Product Downloads

3W 28i engine with 80W generator system Datasheet
Onboard generator system User Manual V1.4

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Product Video

Penguin B presentation