File:Torpedos with contra-rotating propellers to minimize heeling moment - Museum of Great Patriotic War (8601790818).jpg
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Summary
[edit]DescriptionTorpedos with contra-rotating propellers to minimize heeling moment - Museum of Great Patriotic War (8601790818).jpg |
Contra-rotating, also referred to as coaxial contra-rotating, is a technique whereby parts of a mechanism rotate in opposite directions about a common axis, usually to minimise the effect of torque. The efficiency of a contra-rotating prop is somewhat offset by its mechanical complexity. Nonetheless, coaxial contra-rotating propellers and rotors are moderately common in military aircraft and naval applications, such as torpedoes, where the added maintenance cost is not a primary concern. [Wikipedia.org] |
Date | |
Source |
Torpedos with contra-rotating propellers to minimize heeling moment - Museum of Great Patriotic War
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Author | Jorge Láscar from Australia |
Camera location | 50° 25′ 35.48″ N, 30° 33′ 47.47″ E ![]() | View this and other nearby images on: OpenStreetMap | ![]() |
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This image, originally posted to Flickr, was reviewed on 10 August 2013 by the administrator or reviewer File Upload Bot (Magnus Manske), who confirmed that it was available on Flickr under the stated license on that date. |
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current | 14:39, 10 August 2013 | ![]() | 4,288 × 2,848 (2.65 MB) | File Upload Bot (Magnus Manske) (talk | contribs) | Transferred from Flickr by User:High Contrast |
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D90 |
Exposure time | 1/320 sec (0.003125) |
F-number | f/9 |
ISO speed rating | 200 |
Date and time of data generation | 17:43, 3 August 2012 |
Lens focal length | 105 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Ver.1.00 |
File change date and time | 17:43, 3 August 2012 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 17:43, 3 August 2012 |
Meaning of each component |
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Image compression mode | 2 |
APEX exposure bias | 0 |
Maximum land aperture | 5 APEX (f/5.66) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, auto mode |
DateTime subseconds | 00 |
DateTimeOriginal subseconds | 00 |
DateTimeDigitized subseconds | 00 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 157 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
GPS tag version | 2.2.0.0 |