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#COLOR BY SHAPE ROCKET DRIVER#
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The advantages of the multiple-tube boiler were quickly recognised, even for heavy, slow freight locomotives. Its arrangement also made tube cleaning impractical. This offered an increased surface area, but only at the cost of a proportionately increased length and so poor draught on the fire.

Their design though used a single fire-tube, folded in three. The benefits of increasing the fire-tube area had also been attempted with Ericsson and Braithwaite's Novelty at Rainhill.

Rocket 's boiler was of the more highly developed form, with the separate firebox and a blastpipe for draught, rather than Seguin's cumbersome fans, but Rocket was not the first multi-tubular boiler, although it remains unclear just whose invention it was. It is known that Seguin visited Stephenson to observe Locomotion and that he also built two multi-tubular locomotives of his own design for the Saint-Г‰tienneвЂ“Lyon railway before Rocket. The original innovator of multiple fire-tubes is unclear, between Stephenson and Marc Seguin. Additionally, radiant heating from the enlarged separate firebox helped deliver a further increase in steaming and hence boiler efficiency. This arrangement resulted in a greatly increased surface contact area of hot pipe with boiler water when compared to a single large flue. Rocket had 25 copper fire-tubes that carry the hot exhaust gas from the firebox, through the wet boiler to the blast pipe and chimney. Previous locomotive boilers consisted of a single pipe surrounded by water (though the Lancashire Witch did have twin flues). Rocket uses a multi-tubular boiler design. Early locomotive designers had been concerned that the adhesion of a locomotive's driving wheels would be inadequate, but Stephenson's past experience convinced him that this would not be a problem, particularly with the light trains of the trials contest. Rocket placed just over 2 + 1вЃ„ 2В tons of its 4 + 1вЃ„ 2В ton total weight onto its driving wheels, a higher axle load than Sans Pareil, even though the 0-4-0 was heavier overall at 5В ton, and officially disqualified by being over the 4 + 1вЃ„ 2В ton limit. The weight of coupling rods was avoided and the second axle could be smaller and lightweight, as it only carried a small portion of the weight.

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The use of single drivers gave several advantages.

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This was the first 0-2-2 and first single driver locomotive. Stephenson's most visible decision was to use a single pair of driving wheels, with a small carrying axle behind. Innovations Single pair of driving wheels Stephenson realised that whatever the size of previously successful locomotives, this new contest would favour a fast, light locomotive of only moderate hauling power. In particular, the weight of the train expected to be hauled was to be no more than three times the actual weight of the locomotive. Six-wheeled locomotives were limited to six tons, four-wheeled locomotives to four and a half tons. As the first railway intended for passengers more than freight, the rules emphasised speed and would require reliability, but the weight of the locomotive was also tightly restricted. Stephenson designed Rocket for the Rainhill Trials, and the specific rules of that contest. The smaller rear wheels were not coupled to the driving wheels, giving an 0-2-2 wheel arrangement. The large front pair of wooden wheels was driven by two external cylinders set at an angle. The locomotive had a tall smokestack chimney at the front, a cylindrical boiler in the middle, and a separate firebox at the rear.

1.5 Evolution of the Stephenson locomotive design.

1.3.5 Pistons directly connected to driving wheels.

1.3.4 Cylinders closer to the horizontal.

Use your creativity and assemble all the parts in a way of creating the beautiful rocket you ever dream of! DonвЂ™t hesitate to add accessories, color, or any details you want. For the nose, cut the felt in a Pac-Man shape first, and stick both sides together to form a cone. Cut felt and cardboard in different shapes to create the rocket windows, door, nose and tailplanes. Paint the bottle with the color you chose to create the rocket color! DonвЂ™t be shy to be creative and to design your personal other details.

-Any other accessories your imagination is thinking of.

-Scissors (ask help to a parent or a tutor).

-White paint or any other colors of your choice.

To realize this incredible rocket, you will need:.

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Kids dreams can come true with this series of crafts in support of SickKids Foundation!

Color by shape rocket