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Video

Validating Time Triggered Ethernet on a Space Vehicle
2012-03-14
This presentation provides a overview of validating Time Triggered Ethernet (TTE) for use as the network to interconnect the avionics for manned Space Vehicle. The next manned Space Vehicle will use Time Triggered-Gigabit Ethernet (TT-GbE) leveraged from commercial development of TTE critical Intellectual Property. There are several validation considerations of either separating TTE segments or adding new TTE segments onto the network caused by the different phases of a manned space vehicle from pre-launch to re-entry. Considerable amount of validation testing has been successfully performed on TT-GbE/TTE. Presenter Victor Revelle, Honeywell International Inc.
Journal Article

Mathematical Model of Heat-Controlled Accumulator (HCA) for Microgravity Conditions
2020-01-20
Abstract It is reasonable to use a two-phase heat transfer loop (TPL) in a thermal control system (TCS) of spacecraft with large heat dissipation. One of the key elements of TPL is a heat-controlled accumulator (HCA). The HCA represents a volume which is filled with vapor and liquid of a single working fluid without bellows. The pressure in a HCA is controlled by the heater. The heat and mass transfer processes in the HCA can proceed with a significant nonequilibrium. This has implications on the regulation of TPL. This article presents a mathematical model of nonequilibrium heat and mass transfer processes in an HCA for microgravity conditions. The model uses the equations of mass and energy conservation separately for the vapor and liquid phases. Interfacial heat and mass transfer is also taken into account. It proposes to use the convective component k for the level of nonequilibrium evaluation.
Standard

Cloth, Carbon Fiber, Resin Impregnated
2005-06-08
HISTORICAL
AMS3897
This specification and its supplementary detail specifications cover continuous multifilament carbon tow woven into fabric and impregnated with uncured resin.
Standard

Cloth, Carbon Fiber, Resin Impregnated
2016-10-12
CURRENT
AMS3897A
This specification and its supplementary detail specifications cover continuous multifilament carbon tow woven into fabric and impregnated with uncured resin.
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