Hydraulic Decelerator with Segmented Cylinder.
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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This patent discloses a hydraulic decelerator having a waterbrake cylinder positioned within a reservoir wherein the cylinder is made up of a plurality of cylinder segments which are secured to a solid block member with four rods. The interfaces of the segments are ground and polished to provide a smooth close fit. Each segment includes bore holes in a predetermined pattern in the top and two sides with orifice or plug inserts being threaded into the holes. Internally threaded captive ring members are held between semicircular channels at the adjoining surfaces of the channels. Transition orifice inserts are threaded into the ring members. A frangible membrane is secured between the first segment and piston guide assembly secured to the first segment. The reservoir is filled with water, including a rust inhibiter, to a level of about 14 inch above the segmented waterbrake cylinder such as to completely fill the cylinder with water. Author
- Surface Transportation and Equipment