Microturbine Engine Micro Gas Turbine

Williams WR24-7 Turbojet Engine

Williams WR24-7 Specification

Thrust Output…………………………………………………………………………………………………………..………………………………………………..…….180Lbs

RPM………………………………………………………………………………………………………………………………………………………………………………..….60,900

Compressor.…………………………………………………………………………………….…single stage axial followed by single stage centrifugal

Combustor………………………………………………………………………………………………………………………….….disc-shaped with rotary atomiser

Turbine…………………………………………………………………………………………………………………………………………………….single stage axial flow

Layout………………………………………………………………………………………….single shaft turbojet supported on ball and roller bearings

Fuel system………………………………………………………………………………….……electronic control and governor pressurized with P2 air

Ignition System………………………………………………………………………………………….……………………………….…………high energy plug igniter

Starting System……………………………………………………………………………………….…………………………………………………………air impingement

Oil system…………………………………………………………………………………………………total loss oil mist system created by P2 air venturi

Accessories…………………………………………………………………………………………….……………switched reluctance generator on main shaft

Application…………………………………………………………………………….……….……………………………..………………………….…Chukar Target drone

Similar Models………………………………………………………………………..…………………………………………………………………………………...WR27 APU

A nice little turbojet engine manufactured by Williams International. An innovative design featuring compressor air driven accessories including the fuel and oil systems with electronic control. Descended from the previous model the WR24 the engine features an additional axial compressor section. A relatively conventional small engine design but uses no driven accessories or external electric motors. Compressor bleed air is used to pressurise the fuel system and an electronic control unit senses engine speed from the generator and effects proportional fuel flow control with a valve mounted adjacent to the electronic control unit. Lubrication is achieved by creating an “oil mist” again using compressor air discharging through a venturi. Oil is drawn up from a small reservoir and a mist is formed that is ducted to the bearings. A special switched reluctance generator unit provides power to recharge batteries and power avionic equipment on the attached airframe.

More detailed and useful info here published by Thomas Baumgart

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