Their presence impacts animal and human health, military readiness, urban vegetation and infrastructure, water, energy and transportations systems, and indigenous peoples in the United States (Table 9.1). They alter bio-physical systems and cultural practices and require significant public and private ...
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operation (e.g. U.S. Pat. No. 4,303,034). As an aft seal exhibits similar high wear and maintenance characteristics, an SES having different fore and aft seals must carry maintenance supplies and equipment for each type of seal. This adds undesirable weight, storage requirements, and ...
, marsh, tidal flats etc. Hybrid craft10can be made larger or smaller in different shapes and fabricated from a wide variety of materials to assure resistance to corrosion, sufficient strength for heavy loads, and long term reliable operation under a multitude of different operational requirements....
In the intermediate design stage, cavitation inception and blade or vane strength are the major factors in determining thickness, chordlengths, and blade loading distributions for the forward and aft propellers. Consideration is also given to strength requirements and propulsive efficiency which are effec...
Click for automatic bibliography generation Assignee: The Government of the United States of America, as represented by the Secretary of the Navy International Classes: B64D27/02;B64D41/00 Field of Search: 244/53R, 244/62, 429/434, 429/436, 429/505, 429/515, 429/422 ...
United States Patent 4878695 Abstract: A joint having no external protrusions consisting of the mating cylindrical nds of two tubular members joined by interlocking cogs on the male and female ends of the tubular members, and a pair of facing ramp surfaced rings disposed in the joint with one...
United States Patent Application 20100080707 Kind Code: A1 Abstract: A blade outer air seal (BOAS) casting core has first and second end portions and a plurality of legs. Of these legs, first legs each have: a first end joining the first end portion; a main body portion; and a second ...
Expanding mission requirements caused by the increased frequency of regional conflicts and state-sponsored terrorism, have forced fast attack submarines into littoral operations. Submarines are well suited for this type of mission, allowing on-station, forward deployment, without the vulnerability, or forc...
United States Patent 8727628 Abstract: A system for removing oil from a bearing compartment has a port connected to an end wall of the compartment through which the oil exits the compartment, a scavenge scoop connected to the port for collecting the oil, and a separation device connected to ...