Showing papers by "Military Academy published in 1977"

Effects of exhaust manifold configuration on a turbocharged engine employing charge stratification

Abstract: A standard cast iron manifold and a thermal reactor were tested on a lean burning Texaco Controlled Combustion System (TCCS) L141 engine. The purpose of the investigation was to study the interrelationships between engine, manifold/reactor, and turbocharger; and to evaluate the possible effects of the reactor's presence on fuel efficiency. Increased energy inputs into the turbine, higher compressor pressure ratios, and marginal reduction in exhaust gas CO were observed with the reactor; however, an overall 4.6% derogation in bsfc with the thermal reactor was also observed. This was due to greater pumping losses, as evidenced by consistently lower pressure differential between the intake and exhaust valves.

A Prediction Model of Arm Push Strength in the Transverse Plane

Abstract: A study was conducted to determine if a mathematically compact model could be derived to predict arm strength for seated subjects. The purpose of the study was to determine the appropriate algebraic form of the model, and the precise numerical value of the parameters in the model was of secondary interest. An extensive data base of arm strength measurements was compiled for one subject. A detailed analysis of push strength at 65 positions in the shoulder height, transverse plane was performed and a strength prediction model was derived. The forearm was always rotated to the mid-position in this first set of data. A second, more general, set of data was collected at 972 test positions by evaluating 54 (x, y, z) hand locations, three forearm rotations (promotion, mid-position and supination) and six directions of force (left, right, up, down, push and pull). This second set of data was continually referred to in deriving the push strength model. Based on this comparative analysis, it is hypothesized that the algebraic form of the push strength model is appropriate in evaluating more general types of test conditions.

Rational Analysis Of Nonuniform Distributed Networks

Abstract: A set of arrarys as well as its algorithm and the generating procedure are presented for the appro- ximative formulation of rational polynomials of a rion- uniform distributed network. It greatly simplifies and also generalizes the entire calculation procedure.