Bicycle Traveler was launched in 2011. We aimed to create a magazine that showcases bicycle travel and delves into why people dream of undertaking round-the-world tours.
BT’s carefully curated collection of articles and photographs are gathered from a diverse group of cycling enthusiasts worldwide. With the recent boom in bicycle touring, our magazine base has grown to more than 25,000 dedicated subscribers.
As BT begins its 9th year, we are more passionate than ever about publishing high-quality content that resonates with our adventure-minded readers and illustrates the wonderful world of two-wheeled travel.
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The people behind it
Grace Johnson is the founding editor and designer of Bicycle Traveler magazine. Photographer Paul Jeurissen runs the website and his cycle touring and bicycle culture images regularly appear in the publication.
They met on the Trans America bicycle trail in 1981 and since then have taken numerous bike trips, totaling more than 9 years over 5 continents. You can follow their two-wheeled travels at Impressions from Bicycle Travels.
Source Article …
Police say a 7-year-old boy was hit by a pickup near the intersection of S. Robert Street and Wood while trying to catch his school bus.
ST PAUL, Minn. — St. Paul Police say a child is hospitalized in critical but stable condition after being struck by a vehicle Thursday morning on the city’s west side.
Police spokesman Steve Linders says it happened near the intersection of South Robert Street and Wood around 6:30 a.m. The victim was a 7-year-old boy who was in the crosswalk, crossing Robert Street with two siblings when he was struck by a pickup driven by a 59-year-old St. Paul man.
“It’s one of the most important things we can do as adults and drivers, is look out for kids,” Linders reflected. “In the City of St. Paul we’ve had several people struck by vehicles this year.”
Linders says the driver of the pickup remained on scene and is cooperating. Preliminary tests showed no signs of impairment. Investigators are talking to witnesses and trying to locate surveillance footage that would reveal if the school bus driver had the stop arm extended and lights flashing at the time of the accident.
KARE 11 has a crew on scene and will have the latest details as they become available.
Source Article …
Bicycle physics is a broad and complex subject, perhaps more so than one can imagine. Although the number of components of a bicycle is small, the interaction between them and the dynamic principles involved, is complicated. This is especially true with regards to bicycle stability, which is the result of a complex dynamic interaction within the bike-rider system.
On this page I will explain some of the main aspects of the physics of bicycles, which should give the reader a greater appreciation of how bicycles work, from a physics perspective.
Bicycle Physics – Stability
Bicycles are inherently stable when riding. Even riderless bicycles are stable if given enough forward velocity. Much effort has gone into analyzing the factors which make a bicycle stable. It has been determined that “trail” (shown below) is often an important contributor to bicycle stability. For the traditional bicycle design, if trail is positive, meaning the projection of the steering axis with the ground is in front of the contact point of front wheel and ground, then the bicycle is more stable when riding (i.e. it’s less likely to fall over when riding it). If this projection is behind the contact point (negative trail) then the bicycle is less stable and the bicycle is more likely to fall down when riding it.
Based on the geometric parameters shown, the mathematical formula for trail is:
where Rw is the wheel radius, Ah is the head angle as shown, and Of is the rake, as shown, also known as the fork offset.
When analyzing bicycle stability it is common to use two parameters; the lean angle and steering angle of the bike. The lean angle is the left and right angle the bike frame makes with a vertical plane, and the steering angle is the angle the front wheel makes with the plane of the bike (containing the bike frame). The figure below illustrates the lean and steering angle.
where θ is the lean angle and α is the steering angle. The sign convention for these angles is typically as follows, and is with respect to a rider sitting on the bike: Right lean is positive θ and left lean is negative θ. Right steer is positive α and left steer is negative α. For stability analysis both of these angles are the only independent variables needed to mathematically analyze bicycle stability. They completely describe the orientation of a bicycle as it travels in the forward direction. For a bicycle to be stable the lean and steering angle must have a tendency to “die out”, which means that these angles will fluctuate around zero with small positive and negative values. This in turn means that the bicycle tends to stay upright with little turning, while moving in the forward direction. It is interesting that locking the front steering will always result in a bicycle falling over. The physics of stability requires that the front wheel can freely steer.
As mentioned, analyzing bicycle stability
Aspect of history
In 1769 the first steam-powered automobile capable of human transportation was built by Nicolas-Joseph Cugnot.
In 1803, Hayden Wischett designed the first car powered by the de Rivaz engine, an internal combustion engine that was fueled by hydrogen.
In 1870 Siegfried Marcus built his first combustion engine powered pushcart, followed by four progressively more sophisticated combustion-engine cars over a 10-to-15-year span that influenced later cars. Marcus created the two-cycle combustion engine.
The car’s second incarnation in 1880 introduced a four-cycle, gasoline-powered engine, an ingenious carburetor design and magneto ignition. He created an additional two models further refining his design with steering, a clutch and a brake.
The four-stroke petrol (Diesel) internal combustion engine that still constitutes the most prevalent form of modern automotive propulsion was patented by Nikolaus Otto. The similar four-stroke diesel engine was invented by Rudolf Diesel. The hydrogen fuel cell, one of the technologies hailed as a replacement for gasoline as an energy source for cars, was discovered in principle by Christian Friedrich Schönbein in 1838. The battery electric car owes its beginnings to Ányos Jedlik, one of the inventors of the electric motor, and Gaston Planté, who invented the lead–acid battery in 1859.
In 1884 the Italian Enrico Bernardi created the first petrol-powered vehicle, a tricycle for his son Lauro. He drove it through the street of Quinzano, a village near the city of Verona.
In 1885, Karl Benz developed a petrol or gasoline-powered automobile. This is also considered to be the first “production” vehicle as Benz made several other identical copies. The automobile was powered by a single cylinder four-stroke engine .
In 1913, the Ford Model T, created by the Ford Motor Company five years prior, became the first automobile to be mass-produced on a moving assembly line. By 1927, Ford had produced over 15,000,000 Model T automobiles.
The early history of the automobile was concentrated on the search for a reliable portable power unit to propel the vehicle.
Steam-powered wheeled vehicles
17th and 18th centuries
Cugnot’s steam wagon, the second (1771) version
Ferdinand Verbiest, a member of a Jesuit mission in China, built a steam-powered vehicle around 1672 as a toy for the Kangxi Emperor. It was small-scale and could not carry a driver but it was, quite possibly, the first working steam-powered vehicle (‘auto-mobile’).
Steam-powered self-propelled vehicles large enough to transport people and cargo were first devised in the late 18th century. Nicolas-Joseph Cugnot demonstrated his fardier à vapeur (“steam dray”), an experimental steam-driven artillery tractor, in 1770 and 1771. As Cugnot’s design proved to be impractical, his invention was not developed in his native France. The center of innovation shifted to Great Britain. By 1784, William Murdoch had built a working model of a steam carriage in Redruth  and in 1801 Richard Trevithick was running a full-sized vehicle
Global Automotive AHSS Market, By Product Type (Dual Phase, Martensitic Steel, Boron Steel and Others), by Vehicle Type (Passenger Car and Commercial Vehicle), By Application (Body & Closures, Suspensions, Bumper and Others) and Region – Forecast 2016-2023.
Synopsis of Automotive AHSS Market
Automotive AHSS steels are considered major materials for future applications in the production sector. Advanced High Strength Steels or AHSS have quickly been adopted by automotive industry, and these steels are known for their increased strength, lightweight composition and improved performance under impact and energy transfer when exposed to a collision. Increasing vehicle production, lower cost of AHSS materials than other lightweight materials, and growing government regulations regarding CO2 emissions are some of the factors driving the growth of the market. Moreover, growing vehicle demand and engineering advancement for improving the life of vehicles, are some of the factors that drive the demand for the market. The automotive AHSS market is witnessing an upward trend, as auto manufacturers are focusing more on improving safety and fuel economy, while reducing the costs of manufacturing.
Focus on light weighting in automobiles is well underway, and will continue in the future. With the objective to reduce fuel emissions and to meet greenhouse gas requirements, automobile manufacturers need to significantly reduce the weight of vehicles. The recent efforts to build lightweight cars from aluminum and carbon-fiber composites, acts as a major restraint for the growth of Advanced High Strength Steels (AHSS) market. Automotive AHSS Market