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A strong design feature of the Sd.Kfz. 251 was the large track area, with the characteristic "slack track" design with no return rollers for the upper run of track. The Sd.Kfz. 251 also had the Schachtellaufwerk system of overlapping and interleaved main road wheels common to virtually all German halftracks of the period.
Skid brakes were one of the first advancements in roller coaster braking and are typically found on older wooden coasters, such as Leap the Dips, the world's oldest roller coaster still in operation. Side mounted brakes are common on Schwarzkopf roller coasters, such as Scorpion at Busch Gardens Tampa Bay Friction brakes on Speed: No Limits at ...
Wurfrahmen mounted on Sd.Kfz. 251. The Wurfrahmen 40 ("launch frame 40") was a German World War II multiple rocket launcher.It combined a vehicle such as the Sd.Kfz. 251 halftrack or captured French Renault UE Chenillette with rocket artillery to form a more mobile and protected artillery piece than the towed Nebelwerfer.
An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.
Wooden roller coasters also utilize the interior side friction orientation. On inverted roller coasters, such as those produced by Swiss manufacturer Bolliger & Mabillard, the wheel assemblies are typically in the same configurations, despite the cars being positioned below the track. These wheel assemblies typically feature some form of cover ...
For longer distances, a roller chain or belt is quieter and creates less friction, although gears are typically stronger, depending on the strength of the roller chain. A case where numerous idler gears might be used is as described above, where there are a number of output gears that need to be driven simultaneously. Caterpillar track idler wheels
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