Abstract: A composition for preparing a foamed polyurethane article is disclosed. The composition comprises (1) an isocyanate-reactive component and (2) an isocyanate component. The (1) isocyanate-reactive component comprises (A) an organopolysiloxane having an average of at least two carbinol functional groups per molecule and (B) a polyol. The (A) organopolysiloxane is present in an amount of from > 10 to < 99 wt.% based on the combined weight of the (A) organopolysiloxane and the (B) polyol. The (2) isocyanate component comprises (C) a polyisocyanate. The composition further comprises (D) a blowing agent, and (E) a catalyst. A foamed polyurethane article comprising the reaction product of the composition is also disclosed, along with use of the foamed polyurethane article.

Abstract: A coated article, such as a proppant, includes a base substrate and one or more polyurethane based coatings on an outer surface of the base substrate. The one or more polyurethane based coatings including the reaction product of an isocyanate component that has at least one isocyanate and an isocyanate-reactive component that has one or more simple polyols and one or more polyether monols at a ratio from 1:18 to 18:1. An isocyanate index is greater than 0.2 and less than 1.0.

Abstract: A coated article, such as a proppant, includes a base substrate and one or more polyurethane based coatings on an outer surface of the base substrate. The one or more polyurethane based coatings including the reaction product of an isocyanate component that has at least one isocyanate and an isocyanate-reactive component that has one or more simple polyols and one or more polyether monols at a ratio from 1:18 to 18:1. An isocyanate index is greater than 0.2 and less than 1.0.

Abstract: A flight management system (FMS) for an aircraft, that includes an integrated barometric altitude and satellite altitude-based vertical navigation (VNAV) system. The integrated barometric altitude and satellite altitude-based vertical navigation system, includes an altitude blending component for providing a smooth transition from a barometric altimetry source to a satellite altimetry source; and, a satellite altitude containment component operatively connected to the altitude blending component for limiting the difference of a barometric altitude path deviation to within a desired margin of a satellite altitude path deviation.

Abstract: A global navigation satellite system (GNSS) receiver for use in an aircraft is disclosed. The GNSS receiver includes receiver circuitry for receiving satellite signals containing satellite data from a multiple GNSS satellites. The receiver circuitry generates a first navigation solution for the aircraft as function of the satellite data. A first GNSS receiver output couples to an inertial reference system (IRS) and provides the satellite data to the IRS. The IRS generates a second navigation solution for the aircraft as a function of the satellite data and as a function of IRS position data. A first GNSS receiver input couples to the IRS and receives the second navigation solution from the IRS. The GNSS receiver provides at a second output aircraft position information as a function of the second navigation solution.

Abstract: The present invention relates to a multibeam, digitally modulated, time division switched communication system especially for use with a satellite repeater wherein separate up-link and down-link signals are transmitted between each of a plurality of ground station areas and the repeater using space diversity techniques. The frequency band of each up-link signal is split to include at least two frequency multiplexed channels, each channel being separated at the repeater and independently switched at baseband frequencies through a repeater switching network comprising at least two matrix switches for retransmission on the appropriate down-link signal.