Sauter la navigation

Turbomeca ASPIN I

Turbojet with ducted fan, single stage compressor and two stage turbine.

Air intake and fan

Annular air entry containing one row of variable-incidence entry vanes, a single stage compressor fan and one row of fixed straightening vanes.

Fan is driven by compressor shaft through coupling and reduction gear. After fan the air is divided into primary and secondary flows, the former passing to the power section and the latter by-passing that section in an annular casing to the tailpipe where it mixes with the primary jet efflux.


Single-stage centrifugal compressor. Single-sided impeller.

Combustion chamber

Annular type, with rotary fuel injection as in Piméné.

Carcatéristiques de l'Aspin I

1er essais1950
TypeTurboréacteur à double flux
Nb. construits


Diamètre600 mm23.6 in.
Longueur1210 mm47.5 in.


Non équipékg lb
Equipé127 kg279 lb


Régime Maximumt/mnrpm
Régime au ralenti t/mnrpm
Puissance max200 kgp440 lb
Puissance max continu160 kgp352 lb
Puissance au ralentikgplb
Taux de compression / 1
Débit d'air max.g/slbs/sec
Température max cont.deg.Cdef.F


Consommation au décollage0,64 kg/kg/h 0.640 lb/lb/h
Consommation max continu0,58 kg/kg/h0,54 lb/lb/h


Two-stage axial flow turbine

Jet Pipe

Fixed inner cone, annular turbine nozzle and outer pipe wherein the jet efflux and by passed secondary air mix.


Single throttle lever determine the fuel flow and position of variable incidence vanes. Egine speed controled by centrifugal governor. For rapid manoeuvrability a push button operates and electro-hydraulic servo-motor with over-rides manual control and at maximum rotation speed the throttle lever can be used solely to control the entry vanes to obtain rapid variation of thrust without having to oercome the inertia of the rotating assembly.


Throttle at "starter" setting only controls fuel delivery. Entry vanes are closed and engine speed governor is ineffective. Normal starter spins rotating assembly. When engine reaches a rotating speed of 70 per cent. of maximum governor and vane become operative.

List of Aircraft on which the "ASPIN I" was installed