Attenuation of a closing flap for a secondary air intake opening in an aircraft engine
Resiliently coated metallic finger seals
Gas turbine engines
Thrust reverser for a long duct fan engine
Reversible thrust ducted fan propulsion unit
Scoop and inlet for auxiliary power units and method Patent #: 4418879
ApplicationNo. 071157 filed on 05/04/1998
US Classes:244/53BAir intakes
ExaminersPrimary: Poon, Peter M.
Assistant: Ducker, Charles R. Jr.
Attorney, Agent or Firm
Foreign Patent References
International ClassB64B 001/24
Foreign Application Priority Data1997-05-07 FR
AbstractThe system (13) for admitting external air (12) into a working section (11) of a gas turbine engine through a jacket (10) of the working section is characterised by the combination of doors (15) sliding towards the front (ramps) and rotating doors (14). The ramps (15) are fitted with grooved lateral arms (30) in which run wheels mounted on the doors (14). When they reach an ascending part (33) of the grooves (31) after sufficient movement of the ramps (15) towards the front, they are caused to rise, which opens the doors (14). This system can be used on double flow gas turbine engines for supersonic aircraft.