File:Nelson BB-1 Dragonfly.jpg
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DescriptionNelson BB-1 Dragonfly.jpg | This combination of power plant and propeller allowed the Dragonfly to climb 235 feet per minute at sea level. The extra weight of the engine, plus the drag from the widened fuselage, gave the Dragonfly a mediocre lift-to-drag ratio. The self-launch capability cost too much performance to appeal to most prospective motorglider owners and Bowlus and Nelson only sold seven Dragonflys. Nelson attempted to design another self-launching glider in 1949 but this time, he teamed with Harry Perl. Don Mitchell also helped on the new airplane. Nelson and Perl called this new design the Hummingbird (see NASM collection). Nelson mounted a more powerful Nelson engine on a retractable pylon behind a two-seat, tandem cockpit. This arrangement improved the soaring performance but the aircraft cost much more than a conventional, two-seat glider and Nelson and Perl built only six Hummingbirds. |
Date | |
Source | Nelson BB-1 Dragonfly |
Author | Cliff from I now live in Arlington, VA (Outside Washington DC), USA |
Camera location | 38° 54′ 39.23″ N, 77° 26′ 34.83″ W | View this and other nearby images on: OpenStreetMap | 38.910896; -77.443008 |
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Licensing
[edit]This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by cliff1066 at https://www.flickr.com/photos/28567825@N03/2973029411. It was reviewed on 5 April 2009 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
5 April 2009
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 13:53, 5 April 2009 | 1,280 × 852 (316 KB) | El Grafo (talk | contribs) | {{Information |Description= This combination of power plant and propeller allowed the Dragonfly to climb 235 feet per minute at sea level. The extra weight of the engine, plus the drag from the widened fuselage, gave the Dragonfly a mediocre lift-to-drag |
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This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
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Camera model | Canon EOS 5D |
Exposure time | 1/40 sec (0.025) |
F-number | f/2.8 |
ISO speed rating | 400 |
Date and time of data generation | 15:50, 25 May 2008 |
Lens focal length | 52 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | ACD Systems Digital Imaging |
File change date and time | 01:41, 26 October 2008 |
Y and C positioning | Centered |
Exposure Program | Not defined |
Exif version | 2.2 |
Date and time of digitizing | 15:50, 25 May 2008 |
Meaning of each component |
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APEX shutter speed | 5.375 |
APEX aperture | 3 |
APEX exposure bias | 0 |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
DateTime subseconds | 671 |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 3,086.925795053 |
Focal plane Y resolution | 3,091.2951167728 |
Focal plane resolution unit | inches |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Scene capture type | Standard |