File:Modified Rocket Motor Mount (16800038).jpg
Original file (2,095 × 1,531 pixels, file size: 1.09 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionModified Rocket Motor Mount (16800038).jpg |
For the rocketry hobbyist: A number of the mid-power rockets, such as the G and H class rockets from Public Missiles and LOC Precision, have a bare engine tube with instructions on how to use many layers of masking tape on each launch to hold the engine firmly. It seemed inelegant to me for a motor of that size to depend on tape to avoid a couple of catastrophic failure modes. So I jerry-rigged a stable motor mount that has to be incorporated from the beginning of the rocket build. It works especially well for engine clusters; running the screw down the center of 3 engine tubes can secure 3 engines with one bolt. The wing nut holds the engine from the rear, and adjusts for measurement error. I pass the headless screw through a hole drilled through the rear disc and epoxy it to the motor tube. I drill a pair of holes at one engine’s length up the tube and epoxy a straightened paper clip through the center of the motor tube. This holds the motor from the other side. While making these mods, I place another paper clip through farther up to secure a wad of steel wool to capture the ejection charge sparks (so I won’t have to use fireproof paper on every launch). Given the screw sticking down from the bottom, the motor tube should be mounted a bit higher in the airframe if you want the rocket to be freestanding on a flat floor. That may require planning around the fin placement. It was not a problem for this LOC Precision Norad. |
Date | |
Source | Modified Rocket Motor Mount |
Author | Steve Jurvetson from Los Altos, USA |
Licensing
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This image was originally posted to Flickr by jurvetson at https://flickr.com/photos/44124348109@N01/16800038. It was reviewed on 13 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
13 December 2020
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:29, 13 December 2020 | 2,095 × 1,531 (1.09 MB) | Eyes Roger (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Metadata
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 | Panasonic |
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Camera model | DMC-FX7 |
Exposure time | 1/640 sec (0.0015625) |
F-number | f/5.6 |
ISO speed rating | 80 |
Date and time of data generation | 15:42, 29 May 2005 |
Lens focal length | 5.8 mm |
JPEG file comment | AppleMark |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | QuickTime 7.0 |
File change date and time | 16:01, 29 May 2005 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 15:42, 29 May 2005 |
Meaning of each component |
|
Image compression mode | 4 |
APEX exposure bias | −0.33 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |