<div class="htmlview paragraph"><b>C</b>OMPOUNDING arrangements, the authors show, range all the way from the turbosupercharged aircraft engine, where the engine develops all the shaft power, to the hot-gas generator plus turbine combination, where the turbine develops all the shaft power. In between are arrangements where both engine and turbine contribute shaft power.</div> <div class="htmlview paragraph">Calculated performance figures are given for a powerplant with the supercharger-compressor set geared to the reciprocating-engine component and for the hot-gas generator plus turbine. Experimental data are given on a diesel engine used to simulate a hot-gas generator.</div> <div class="htmlview paragraph">A semifree piston hot-gas generator, proposed to circumvent certain difficulties with free-piston units, appears in <span class="xref">Fig. 19</span>.</div> <div class="htmlview paragraph">P. H. SCHWEITZER (M '23), professor of engineering research at The Pennsylvania State College, is also engaged in consulting work advising General Electric Co. and several engine builders on diesel development. From 1920 to 1923 he was machinist, assistant master mechanic, and engine designer for the De La Vergne Machine Co. and tool designer for the Oakland Motor Car Co. Since 1923 he has been in charge of the Pennsylvania State diesel laboratory. He received his degree of Mechanical Engineer at the Technical University of Budapest and his Doctor of Engineering degree at the Technical Institute of Dresden.</div> <div class="htmlview paragraph">J. K. SALISBURY is division engineer, Thermal Power Systems Division, General Engineering and Consulting Laboratory of General Electric Co. After receiving his MS in mechanical engineering from the University of Michigan in 1930, he joined General Electric as test and field engineer. He was subsequently appointed to work on steam turbines, naval propulsion equipment, powerplants of all types, and in 1946 was transferred to the Laboratory, Mr. Salisbury was appointed to his present position in 1947.</div>