| Download | - View final version: Further aspects of dual-operation powerplants for VTOL aircraft (PDF, 12.3 MiB)
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| DOI | Resolve DOI: https://doi.org/10.4224/40003912 |
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| Author | Search for: Cockshutt, E. Philip1 |
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| Affiliation | - National Research Council Canada. National Aeronautical Establishment
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| Format | Text, Memorandum |
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| Physical description | 24 p. |
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| Abstract | Dual operation powerplants which use jet propulsion for cruising and rotors for hovering were described in a previous memorandum, NAE-ENG-46: in it pure turbojet and separate bypass engine cycles were considered. In this memorandum consideration is given to mixed bypass engines, i.e., engines in which the bypass air is mixed in the tailpipe with that which has passed through the engine proper. Consideration is also given to the augmentation of hovering power using ramjets at the rotor tips.
It is shown that the mixed bypass cycle enjoys the better features of both the' separate bypass and pure turbojet cycles, and seems on the whole to be the best dual-operation cycle. Ramjet augmentation of the hovering performance using a tip speed of 1000 ft/sec. is shown to be most unattractive from the point of view both of specific fuel consumption and of required size; these disadvantages would however disappear if it were possible to operate at appreciably supersonic tip speeds. |
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| Publication date | 1957-04-09 |
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| Publisher | National Research Council Canada |
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| Series | |
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| Language | English |
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| Peer reviewed | No |
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| Identifier | NAE-446-1 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 7de2d9f9-47d3-4435-9ea0-1a9af432b205 |
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| Record created | 2025-12-01 |
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| Record modified | 2025-12-01 |
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