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This is the “HobbyKing Quadcopter Control Board V2 (Atmega168PA)” [QUAD-CON16K] board. It’s bases on the KK control board. It contains three Japanese Murata piezo gyros for roll, pitch and yaw that are meant to be less sensitive to vibration than other gyros. The board has an Atmega168PA micro controller.
The board is meant to stabilise the quadcopter during flight. While there is documentation and I understand some of it I’m still struggling with this board. Adjusting the pots for roll, pitch and yaw is proving difficult but may not be the cause of my failing to fly.
The control tower at Greenham Common is due to be some sort of visitor's centre, selling souvenirs. I don't know, a miniature replica ICBM for your keyfob or something.
Peer down on this puny building from your almighty vantage point with the Google Earth linker.
Denver, CO -- The control tower is one of the last prominent features remaining from Stapleton International Airport. The tower now stands center of a residential and park redevelopment project. The last flight controlled by the tower was on February 25, 1995, when a Continental flight departed for London.
This work by cooper gary is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs License. If you use this photo, please credit as "photo by cooper gary" with a link-back to this page on Flickr.
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USS Becuna (SS-319)
Philadelphia PA
Length: 307 feet, 7 inches
Beam: 27 feet
Displacement: 1,800 tons surfaced, 2,400 tons submerged
Crew: 8 commissioned officers, 5 chief petty officers, 67 enlisted men
Top Speed after Guppy refit: 15 knots (17mph) submerged, 18 knots (21mph) surfaced
Launched in 1944, the Becuna (SS-319) completed five wartime patrols in the Pacific Ocean. Becuna is similar to many submarines built in Philadelphia for the U.S. Navy.
Becuna is a BALAO-class submarine built in New London, CT. During World War II, "Becky" prowled the Pacific Ocean for Japanese ships, and is credited with sinking 3.5 Japanese merchant ships. Converted in 1951 to a Guppy 1A type with sophisticated radar and torpedo equipment including nuclear warheads, she is the only Guppy 1-A submarine on display.
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The control board is a go between. The radio receiver passes on the signal for the control board to interpret which passes on a signal to each of the electronic speed controllers which controls the speed of the motors.
If the control board detects the quadcopter tilting down it counters it by speeding up the lowered motor and slowing down the raised motor.
Fort A.P. Hill begins spring controlled burns
Fort A.P. Hill Forestry began its spring controlled burns March 18 with burns on the southern part of the post. The controlled burns reduce fuel and control vegetation in training areas and ranges; they also help to reduce the risk of wildfires on the installation and from fires spreading off post.
Today’s crews used the Terra Torch, a gel-fuel ignition system that shoots a thickened mixture of gasoline, diesel and water into an area to start a fire.
Fort A.P. Hill will continue controlled burns for the next several weeks as weather permits.
U.S. Army photos by Bob McElroy
plans designed by John Welsford, rigging details by Kees Prins. Copyright Small Craft Advisor Magazine, all rights reserved.
Controls of the CMS magnet.
The voltmeter and ampmeter are clearly visible, with their respective scale.
Motion control head I designed around a pair of surplus precision worm gearboxes. The vacuum infused carbon fibre covers are largely superficial/protective, they were my first experiment in directly CNC machining a mould. I machined the aluminium parts on my CNC router and anodized them at home.
Because the head was constructed around existing gearboxes its a little larger and heavier than I would like, weighing around 5KG but supporting loads upwards of 10kg.
Previous: Exposure correction in Preview Panorama
The alignment algorithm evidently knows to sacrifice those control points that it considers hopeless. This view indicates the discrepancy between the control points. Those that align well are shown as dots. Those that could not be aligned are connected with lines showing the residual distances.
This begs a question: why didn't I ditch the second frame? I tried. The result was even worse. However awkward its orientation seems to be, it helps to join the frames 1 and 3 where it matters most — at the skyline.
The distance view makes it easy to understand the orientation of the original frames. For example, it shows very clearly that point of view of the second frame (of which only a portion is visible) was a few steps away from the more-or-less shared point of view of the other frames.
This screenshot is best viewed in the original size because the dots and lines are one pixel wide. They vanish when the image is scaled down.
Westover ARB Air Traffic Control Tower
© Jason Grant - All Rights Reserved unauthorized use is strictly prohibited.
Pictures of my Classic Space inspired display presented at "Une tonne de briques" expo held on June 3, 2018 in Saint-Basile-le-Grand, Quebec.
Timber is planed and shaped by machine but each item is fed by hand to enable quality control at the same time.
Working on attaching the control rod to the lower leg: tried a fixed joint, but the control rod always seemed to be in the wrong place, so I rigged up a flexible joint. There was a lot of strain for my wrist lifting the leg in certain positions, so I started playing around with this fore-arm brace, which seems to be helping (needs a little more hardware)