Model of the 'Oryx' aircraft gas-turbine

Made:
1955

Quarter-scale model of the "Oryx" aircraft gas-turbine. Gas turbine, gas-generator. 12 stage axial compressor, 2 stage turbine. Auxillary air compressor, 4 stage axial flow. Weight 500 lb.

This ΒΌ scale model engine shows a design that was specifically developed to provide a means of driving helicopter rotor blades by reaction jets at the blade tips. Two of these engines were fitted to the Hunting Percival P.74 Helicopter and were used to evaluate the application of a blade tip drive which would be torqueless i.e. would not need a means to counter the rotor torque. A similar drive was used on the Fairey Rotodyne helicopter but with a different power unit.

Basically, the engine is a normal axial flow compressor gas turbine with an auxiliary air compressor driven off the same shaft at the rear end. Exhaust gases from the turbine are mixed with the delivery from the auxiliary air compressor and are then deducted to the hollow rotor blades, the tip jets driving them on the reaction principle.

Performance: equivalent h.p. 900 at 22,000 r.p.m. Power/weight ratio. 1:.55.

Details

Category:
Aircraft Propulsion
Object Number:
1958-172
type:
model - representation
taxonomy:
  • visual and verbal communication
credit:
D. Napier and Sons Limited

Cite this page

Rights

We encourage the use and reuse of our collection data.


Data in the title, made, maker and details fields are released under Creative Commons Zero


Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence

Using our data

Download

Download catalogue entry as json

Download manifest IIIF

Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.