Patent ID: 7251927

Claim:
In a nozzle for a jet engine having an existing first stage mixer which includes a number of first stage lobes, the improvement comprising a second stage mixer adapted for engagement to the first stage mixer, said second stage mixer having a base section having a first end constructed and arranged for attachment to a jet engine; and mixer lobes extending from said base section, said mixer lobes increasing in height as said mixer lobes extend away from said first end of said base section to an undulating configuration defining a terminus area of said mixer; and an adjustment device attached to a lobe to adjust the individual dimensions of said lobe and thereby adjust the total area of said terminus area, said adjustment device including a first spacer element constructed and arranged to selectively move between a first locked position wherein said lobe has a first dimension and a second locked position wherein said lobe has a second dimension, each of said mixer lobes having a substantially curved shape defined by two communicating sides curving around a center axis, and said adjustment device being fixedly connected to each of said two sides of said corresponding mixer lobe to move said two sides relative to said center axis, said adjustment device extending directly between said two sides, and the entirety of said adjustment device extending directly between said two sides being positioned in-between said two sides of said mixing lobe and being supported in position in-between said two sides only by the connection of said adjustment device with said two sides and being otherwise free standing.