Technical Note - National Advisory Committee for Aeronautics Volume 5-20

Technical Note - National Advisory Committee for Aeronautics Volume 5-20

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ...of volume of stroke is shown without the possibility of any additional super-compression being taken into consideration. If super-compression is employed at the same time, the volume of the strokes is materially diminished. Below 4000 m., the increase of weight through increased stroke volume, and the lengthening of the total construction thereby necessitated, would appear to exceed the weight of a preliminary compressor. The question cannot, however, be determined by considering the weight alone. For the pre sent, greater safety in working and more convenient inbuilding may rather be expected of the over-sized engine than of the engine with preliminary compressor, as the latter requires to be driven with highly sensitive spur gear with high tooth velocities. The Maybach engine was not only the first super-compressed engine, but also the first over-sized engine, although its over-size was not so highly developed as in more recent types. The BAVARIAN ENGINE HOBES, Ltd., went a step further with their 185 H.P. It resembles the mercedes 160 H.P. engine in weight and constructive parts, and its dimensions are euch that its power remains constant up to almost 3000 m. The high degree of compression of this engine ie remarkable. It attains 6.7 without the creation of any difficulties. This fact is probably to be ascribed to skillful induction of the cooling water into the cylinder-head. The SIEMENS and GOEBEL engines are examples of over-sized rotary engines. It was Professor JUNKERS who first recognized the advantages offered by over-sizing and obtained a patent for the same., D.R.P. Bo. 300007. Engines with preliminary compressors aod over-sized engine require constat regulation of the pressure in front of the carburetor wbila climbing. For...show more

Product details

  • Paperback | 54 pages
  • 189 x 246 x 3mm | 113g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236507533
  • 9781236507532