 | API for Pedal Power Video for innovation contest sponsored by Google and Specialized. The device is a standard indoor bicycle trainer resistance unit modified with the addition of a pulley to the flywheel, and with replacement by the mag unit with a second pulley. The two belt-driven pulleys power either a laundry spinner for water extraction or an electric generator. Proposal: tweak existing trainer designs by (1) putting a V-belt groove in the flywheel edge (2) designing toggle to lock out resistance |
 | Lecture -30 Belt Drives Lecture Series on Design Of Machine Elements-I by Prof. B Maiti, Department of Mechanical Engineering,IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in |
 | Mechanical Safety, Part 1 of 2 (ABB103) Mechanical Safety, Part 1 of 2. If it's springtime where you are, you'll be interested in this week's program. Are you shopping for a second-hand bike? Just pulled the old clunker out of the basement? Or maybe you're prepping the machine for autumn storage (hello, Australia!). Bill Mould, Chief Mechanic at Spokes Etc in Alexandria, Virginia guides us through some safety considerations before putting an unfamiliar bike on the trail. Bill is a master bike mechanic and instructor, with a bench full of certifications and decades of advanced maintenance under his tool belt. We'll be dropping in on Bill now and then for some expert advice and a helpful shot of practical maintenance knowledge. Don't miss Part Two next week... We first meet two racers fresh off the mountain bike track at the recent Greenbrier Challenge. Cass and Tanya were joined by over five hundred others in April in northern Maryland for one of the fastest growing MTB events in the world. The event is now part of the UCI system, which means watch for future Olympic cyclists in an upcoming episode. You may notice a different look to the video file this week, as A Billion Bikes will now often be seen in 16x9 widescreen aspect (non-letterboxed), and a higher resolution in iTunes as well. If you're watching with older software, you may see a picture that's squeezed horizontally. Updating your browser or other media player should correct the problem. We hope you enjoy the series, and we'll be bringing you more programs from bicycling cultures around the world, such as the excellent Copenhagen series from earlier episodes. If you're aware of international programs, in any language, that would benefit the audience here, I'd be very happy to hear from you at programs@abillionbikes.com . |
 | BELT TIGHTENER IN CATIA V5 Design of belt tightener project in catia v5 |
 | Mechanical Tensioner Set Up How it looks to properly set up a mechanical tensioner in a 420A 2G Eclipse. |
 | Physics III Q_ Rotational Mechanical Transformers Belts, G Physics III Q_ Rotational Mechanical Transformers Belts, G |
 | Volvo 850 Serp. Belt Noise? Mechanical chattering noise from serpentine belt area. Worse when warm. Much louder with A/C on. Idler pulley, Tensioner problem or A/C compressor or cluth going bad? I have no idea. Very annoying. Goes away immediately off idle. This particualar video is with the A/C on. The pitch is actuall much higher than in the video. Adding treble may help it sound more realistic. UPDATE: Noise has been identified. This noise is associated with a bad "idler pulley" and a badly worn serp. belt. |
 | David and Zachary's Conveyor Belts In our Mechanical Engineering 2A class we investigated how to make a conveyor belt using LEGOs. The boys made some modifications -- some worked, some didn't. They also learned about rotary and linear motion. |
 | Belt CP rear rotor mechs A tesk of mechanical control of the rear rotor of my Belt CP in action. |
 | Science in China科学与中国1-1普天之下 Among the scientific accomplishments of ancient China were paper (not papyrus) and papermaking, woodblock printing and movable type printing, the early lodestone and magnetic compass, gunpowder, toilet paper, early seismological detectors, matches, dry docks, pound locks, sliding calipers, the double-action piston pump, blast furnace and cast iron, the iron plough, the multi-tube seed drill, the wheelbarrow, the suspension bridge, the parachute, natural gas as fuel, the escapement mechanism for clocks, the differential gear for the South Pointing Chariot, the hydraulic-powered armillary sphere, the hydraulic-powered trip hammer, the mechanical chain drive, the mechanical belt drive, the raised-relief map, the propeller, the crossbow, the cannon, the rocket, the multistage rocket, etc. Chinese astronomers were among the first to record observations of a supernova. The work of the astronomer Shen Kuo (1031--1095) alone was most impressive, as he theorized that the sun and moon were spherical, corrected the position of the polestar with his improved sighting tube, discovered the concept of true north, wrote of planetary motions such as retrogradation, and compared the orbital paths of the planets to points on the shape of a rotating willow leaf. With evidence for them, he also postulated geological theories for the processes of land formation in geomorphology and climate change in paleoclimatology. Yet there were many other astronomers than Shen Kuo, such as Gan De, Shi Shen, Zhang Heng, Yi Xing, Zhang Sixun, Su Song, etc. Chinese mathematics evolved independently of Greek mathematics and is therefore of great interest in the history of mathematics. The Chinese were also keen on documenting all of their technological achievements, such as in the Tiangong Kaiwu encyclopedia written by Song Yingxing (1587--1666). China's science and technology fell behind that of Europe by the 17th century. Political, social and cultural reasons have been given for this, although recent historians focus more on economic causes, such as the high level equilibrium trap. Since the PRC's market reforms China has become better connected to the global economy and is placing greater emphasis on science and technology. |
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