A report on increasing the thrust of a turbojet engine by combustion of fuel in the tail pipe

• Main Authors: Gibson, Charles Edward, Knapp, Elton Lewis, Woodhull, Roger Blake
• Format: Others
• Published: 1945
• Online Access: https://thesis.library.caltech.edu/8714/6/Gibson%201945.pdf; Gibson, Charles Edward and Knapp, Elton Lewis and Woodhull, Roger Blake (1945) A report on increasing the thrust of a turbojet engine by combustion of fuel in the tail pipe. Engineer's thesis, California Institute of Technology. doi:10.7907/1HM4-J830. https://resolver.caltech.edu/CaltechTHESIS:10272014-161735506 <https://resolver.caltech.edu/CaltechTHESIS:10272014-161735506>

<p>The purpose of this work was to develop a means of increasing the thrust of a turbojet engine by burning kerosene in the tail pipe.</p> <p>A combustion system was developed which gave the following results: <br /> (l) Maximum thrust increase using a G.E. I-14 engine was 64 per cent over straight tail pipe thrust corresponding to 42 per cent increase over the normal engine thrust. This increase was accomplished at an engine rpm of 12,000.<br /> (2) Increase of maximum thrust obtained was 51 per cent over the straight tail pipe thrust corresponding to 23 per cent over the normal engine thrust. This increase was accomplished at an engine rpm of l6,000.<br /> (3) For the thrust increases mentioned in (1) and (2) above, increases of Specific Fuel Consumption were 66 per cent and 76 per cent respectively over normal engine SFC.</p>