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- Ο τροχός Dreadnaught είναι ένας τροχός με αρθρωτές ράγες που συνδέονται στο χείλος του για να παρέχει μια σταθερή βάση για το όχημα που θα κυλήσει. Έχει επίσης γνωστός ως "απέραντος σιδηροδρομικός τροχός". (el)
- Radgürtel (nicht zu verwechseln mit Radreifen) wurden vor allem gegen Ende des 19. Jahrhunderts bis nach dem Ersten Weltkrieg verwendet, um die Mobilität von schweren Geschützen und anderen militärischen Fahrzeugen auf schlecht tragfähigem Untergrund zu verbessern. (de)
- A dreadnaught wheel is a wheel with articulated rails attached at the rim to provide a firm footing for the wheel to roll over. These wheels have also been known as "endless railway wheels" when fitted to road locomotives, and were commonly fitted to steam traction engines. They are very similar to pedrail wheels, differing primarily in that their rails are not connected to the wheel directly, but articulated to each other. Prior to wide adoption of continuous track on vehicles, traction engines were cumbersome and not suited to crossing soft ground or the rough roads and farm tracks of the time. The "endless rails" were flat boards or steel plates loosely attached around the outer circumference of the wheels, which spread the weight of the vehicle over a larger surface and hence made it less likely to get bogged by sinking into soft ground or skidding on slippery tracks. An early version was patented by James Boydell in August 1846 and February 1854.Boydell worked with the British steam traction engine manufacturer Charles Burrell & Sons to produce road haulage engines from 1856 that used his continuous track design. Burrell later patented refinements of Boydell's design. A number of horse-drawn wagons, carts and gun carriages using Boydell's design saw service with the British Army in the Crimean War (October 1853 and February 1856). The Royal Arsenal at Woolwich manufactured the wheels, and a letter of commendation was signed by Sir William Codrington, the General commanding the troops at Sebastapol. An Australian blacksmith and engineer, Frank Bottrill (1871–1953), after a failed endeavour using wheeled traction engines in outback Australia, and becoming aware of the Boydell wheel, decided to improve the design. In 1907 he patented an "improved road wheel for travelling, useful for traction engines". Bottrill's design used two rows of overlapping rails fastened to the rim with cables to smooth the transition from rail to rail. Eventually Bottrill, in association with A. H. MacDonald & Co. of Richmond, Melbourne, began producing steam and oil-based tractors fitted with his wheels. The most famous was known as "Big Lizzie," built in 1915, with a wheel diameter of 7 feet 2 inches (2.18 m). At 34 ft (10.4 m) long and 45 long tons (46 metrictonnes), with two dreadnought wheeled trailers it was capable of carrying a total of 80 long tons (81 metrictonnes) and effectively making its own roads. Some references also use the term pedrail. The issue is further confused by Bottrill referring to his design as "ped-rail shoes". The two concepts are similar in that they attempt to improve cross-country performance by spreading out the load on a flat surface. The difference is primarily in how the pads are connected; the dreadnaught wheel connects the pads to each other and ride along the wheel, whereas in the pedal arrangement, introduced in 1903, each pad is connected to a pivot on the wheel itself, and there are no inter-pad connections. Some pedrail systems also include internal suspensions to improve their performance over rough ground. Bottrill's design spans the definition, as its cable attachments are similar to the pedrail connections, albeit much more simple. (en)
- Una rueda dreadnaught es un tipo de rueda dispuesta con rieles articulados unidos a su borde para proporcionar una base firme, de forma que la rueda gire sobre ellos. También se conocen como ruedas ferroviarias sin fin cuando se utilizan en locotractores de carretera. Se montaban sobre todo en vehículos con motores de tracción a vapor. Son muy similares a las ruedas pedraíl, en las que los apoyos están articulados individualmente, en vez de estar articulados entre sí como en el caso de las ruedas dreadnaught. (es)
- Una ruota Dreadnaught (dall'inglese: "non temo niente") è una ruota recante una serie di traverse agganciate al cerchio a mo' di battistrada, atte a garantire alla ruota un punto d'appoggio fermo sul quale ruotare. Queste ruote, conosciute anche come "ruote a traverse senza fine" quando utilizzate su locomotive stradali, erano comunemente montate su . Molto simili alle contemporanee ruote Pedrail, le ruote Dreadnaught ne differivano per il fatto che le traverse non erano direttamente attaccate alla ruota ma articolate l'una all'altra, nel caso della ruote Pedrail, poi, in diverse versioni ognuno degli appoggi era dotato di un proprio ammortizzatore, componente assente, invece, nelle ruote Dreadnaught. Un altro componente simile a queste ruote fu il cingolo Bonagente, che differisce però dalle ruote Dreadnaught per la disposizione delle traverse, che, nel caso dell'invenzione italiana, sono disposte su un'unica fila. (it)
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- Big Lizzie with photo next to a Landrover 4WD (en)
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- Ο τροχός Dreadnaught είναι ένας τροχός με αρθρωτές ράγες που συνδέονται στο χείλος του για να παρέχει μια σταθερή βάση για το όχημα που θα κυλήσει. Έχει επίσης γνωστός ως "απέραντος σιδηροδρομικός τροχός". (el)
- Radgürtel (nicht zu verwechseln mit Radreifen) wurden vor allem gegen Ende des 19. Jahrhunderts bis nach dem Ersten Weltkrieg verwendet, um die Mobilität von schweren Geschützen und anderen militärischen Fahrzeugen auf schlecht tragfähigem Untergrund zu verbessern. (de)
- Una rueda dreadnaught es un tipo de rueda dispuesta con rieles articulados unidos a su borde para proporcionar una base firme, de forma que la rueda gire sobre ellos. También se conocen como ruedas ferroviarias sin fin cuando se utilizan en locotractores de carretera. Se montaban sobre todo en vehículos con motores de tracción a vapor. Son muy similares a las ruedas pedraíl, en las que los apoyos están articulados individualmente, en vez de estar articulados entre sí como en el caso de las ruedas dreadnaught. (es)
- A dreadnaught wheel is a wheel with articulated rails attached at the rim to provide a firm footing for the wheel to roll over. These wheels have also been known as "endless railway wheels" when fitted to road locomotives, and were commonly fitted to steam traction engines. They are very similar to pedrail wheels, differing primarily in that their rails are not connected to the wheel directly, but articulated to each other. (en)
- Una ruota Dreadnaught (dall'inglese: "non temo niente") è una ruota recante una serie di traverse agganciate al cerchio a mo' di battistrada, atte a garantire alla ruota un punto d'appoggio fermo sul quale ruotare. Queste ruote, conosciute anche come "ruote a traverse senza fine" quando utilizzate su locomotive stradali, erano comunemente montate su . Molto simili alle contemporanee ruote Pedrail, le ruote Dreadnaught ne differivano per il fatto che le traverse non erano direttamente attaccate alla ruota ma articolate l'una all'altra, nel caso della ruote Pedrail, poi, in diverse versioni ognuno degli appoggi era dotato di un proprio ammortizzatore, componente assente, invece, nelle ruote Dreadnaught. Un altro componente simile a queste ruote fu il cingolo Bonagente, che differisce però da (it)
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- Radgürtel (de)
- Τροχός Dreadnaught (el)
- Rueda dreadnaught (es)
- Dreadnaught wheel (en)
- Ruota Dreadnaught (it)
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