Operator's manual : compressor unit, reciprocating, power-driven, flamethrower, 3-1/2 cfm, AN-M4 (Walter Kidde), NSN 4310-00-592-8560, AN-M4B (Stewart-Warner), NSN 4310-00-848-6075, AN-M4C (Stewart-Warner), NSN 4310-00-078-5431, AN-M4D (Walter Kidde), NSN 4310-00-181-5054.

"November 1976."

Operator's manual : welding machine, ARC, generator, diesel driven, single operator, remote control, 300 AMP, DC ARC, skid MTD, 60 AMP 20 V MIN, 375 AMP AT 40 V MAX, current 115 V 3 KW auxiliary power (Libby model ODW-300) FSN 3431-894-1573.

"August 1962."

Direct and general support maintenance repair parts and special tools list (including depot maintenance repair parts and special tools) for lubricating and servicing unit, power operated, trailer mounted, 23 CFM, compressor, reciprocating, GED (Elliot machine model ENG 3), NSN 4930-00-935-4451.

"9 April 1987."

Field and depot maintenance manual : generator set, diesel engine precise power; 100 KW, AC, 120/208 V, 240/416 V, 3 phase, 60 cycle at 1800 RPM, 83.3 KW, 120/208 V 240/416 V, 3 phase, 50 cycle at 1500 RPM; skid mounted (Detroit Diesel Divn. General Motors Corp. model 6910A) FSN 6115-798-3444.

Includes index.

Operator, organizational, DS, and GS maintenance manual : generator set, diesel engine driven, liquid cooled, AC, 100 KW, 120 208, 240 416 volt, 3 phase, 4 wire, 50 60 HZ, skid mtd (Jeta power model D8001M) FSN 6115-156-4342).

"July 1970."

Organizational maintenance repair parts and special tools lists : power plant, electric, diesel engine, skid mounted, 3 unit, 1500 kw, 4160 V, 60 Hertz (A.G. Schoonmaker model SM500-6800-3) FSN 6115-250-4404, 4 unit, 2000 kw, 4160 V, 60 Hertz ....

"June 1971."

Direct and general support and depot maintenance repair parts and special tools lists : power plant, electric, diesel engine, skid mounted, 3 unit, 1500 kw, 4160 V, 60 hertz (A.G. Schoonmaker model SM500-6800-3) FSN 6115-250-4404, 4 unit, 2000 kw, 4160 V, 60 hertz ....

"June 1971."

Operator, organizational, direct and general support, and depot maintenance manual : motor generator power supply, generator - 60 KW, AC, 120/208V, 240/416V, 3 phase, 4 wire service, 400 cycle, DC component output, 28V, 10 amp, motor input, AC, 120/208V, 240/416V, 3 phase, 60 cycle, skid mounted (John R. Hollingsworth Co. model JHMX60G) FSN 61225-963-6712.

Includes index.

Organizational, direct and general support, and depot maintenance repair parts and special tools lists : motor generator, power supply generator, 60 kw, 120/208, 240/416 volt, 3-phase, 4 wire service, 400 hertz, DC component output, 28 volt, 10 amp, motor input AC, 416 volt, 3-phase, 60 hertz, portable skid mounted (General Dynamics Corp. model 14105008), FSN 6125-917-2244.

"November 1970."

Direct support maintenance manual : static power inverter PP-7274D/A (EMP model PS 227-3) (NSN 6125-00-148-8342) (serial no.'s 8044-410-24 and following).

Includes index.

Erratum: Two-Dimensional Failure Modeling with Minimal Repair which appeared in this journal of April 2004, Volume 51:3 on pages 345–362

In this Erratum, we point out the reason for an error in the derivation of a result in our earlier paper, “Two-Dimensional Failure Modeling with Minimal Repair” [1], which appeared in the April 2004 issue of this journal, 51:3, on pages 345–362, and give the correct derivation.

A micro gas turbines for UK domestic combined heat and power

Various micro-radial compressor configurations were investigated using one-dimensional meanline and computational fluid dynamics (CFD) techniques for use in a micro gas turbine (MGT) domestic combined heat and power (DCHP) application. Blade backsweep, shaft speed, and blade height were varied at a constant pressure ratio. Shaft speeds were limited to 220 000 r/min, to enable the use of a turbocharger bearing platform. Off-design compressor performance was established and used to determine the MGT performance envelope; this in turn was used to assess potential cost and environmental savings in a heat-led DCHP operating scenario within the target market of a detached family home. A low target-stage pressure ratio provided an opportunity to reduce diffusion within the impeller. Critically for DCHP, this produced very regular flow, which improved impeller performance for a wider operating envelope. The best performing impeller was a low-speed, 170 000 r/min, low-backsweep, 15° configuration producing 71.76 per cent stage efficiency at a pressure ratio of 2.20. This produced an MGT design point system efficiency of 14.85 per cent at 993 W, matching prime movers in the latest commercial DCHP units. Cost and CO2 savings were 10.7 per cent and 6.3 per cent, respectively, for annual power demands of 17.4 MWht and 6.1 MWhe compared to a standard condensing boiler (with grid) installation. The maximum cost saving (on design point) was 14.2 per cent for annual power demands of 22.62 MWht and 6.1 MWhe corresponding to an 8.1 per cent CO2 saving. When sizing, maximum savings were found with larger heat demands. When sized, maximum savings could be made by encouraging more electricity export either by reducing household electricity consumption or by increasing machine efficiency.

A converter compensator for power factor control in 3-phase induction machines

The advent of the harmonic neutralised shunt Converter Compensator as a practical means of reactive power compensation in power transmission systems has cleared ground for wider application of this type of equipment. An experimental 24-pulse voltage sourced convector has been successfully applied in controlling the terminal power factor of a 1.5kW, 240V three phase cage rotor induction motor, whose winding has been used in place of the usual phase shifting transformers. To achieve this, modifications have been made to the conventional stator winding of the induction machine. These include an unconventional phase spread and facilitation of compensator connections to selected tapping points between stator coils to give a three phase winding with a twelve phase connection to the twenty four pulse converter. Theoretical and experimental assessments of the impact of these modifications and attachment of the compensator have shown that there is a slight reduction in the torque developed at a given slip and in the combined system efficiency. There is also an increase in the noise level, also a consequence of the harmonics. The stator leakage inductance gave inadequate coupling reactance between the converter and the effective voltage source, necessitating the use of external inductors in each of the twelve phases. The terminal power factor is fully controllable when the induction machine is used either as a motor or as a generator.