Rainhill Trials

Later conjectural drawing of the Rainhill Trials. In the foreground is Rocket and in the background are Sans Pareil (right) and Novelty.

The Rainhill Trials were an important competition in the early days of steam locomotive railways, run in October 1829 for the nearly completed Liverpool and Manchester Railway. Five engines competed, running back and forth along a mile length of level track at Rainhill, in Lancashire (now Merseyside).

Stephenson's Rocket was the only locomotive to complete the trials, and was declared the winner. The Stephensons were accordingly given the contract to produce locomotives for the railway.

Background

When the Liverpool and Manchester Railway was approaching completion, the directors of the railway ran a competition to decide whether stationary steam engines or locomotives would be used to pull the trains. The Rainhill Trials were arranged as an open contest that would let them see all the locomotive candidates in action, with the choice to follow.[1] Regardless of whether or not locomotives were settled upon, a prize of £500 was offered to the winner of the trials. Three notable figures from the early days of engineering were selected as judges: John Urpeth Rastrick, a locomotive engineer of Stourbridge, Nicholas Wood, a mining engineer from Killingworth with considerable locomotive design experience and John Kennedy, a Manchester cotton spinner and a major proponent of the railway.

Rules

Locomotives that were entered were to be subjected to a variety of tests and conditions. These were amended at various points, but were eventually nailed down to:

Entries

Replica of the Novelty in the Transport Museum in Nuremberg during the exhibition "Adler, Rocket and Co."
Replica of the Rocket in its original condition in Nuremberg
Replica of the Sans Pareil in Nuremberg
The preserved Rocket at the Science Museum in London

Ten locomotives were entered, but on the day the competition began — 6 October 1829 — only five locomotives actually began the tests:

Competition

Locomotives were run two or three per day, and several tests for each locomotive were performed over the course of several days.

The Rainhill stretch of the Railway was very level for a mile or so: a perfect site for the Trials.[1]

Cycloped was the first to drop out of the competition. Built with "legacy technology", it used a horse walking on a drive belt for power, and was withdrawn after an accident caused the horse to burst through the floor of the engine.

Next to retire was Perseverance. Damaged en route to the competition, Burstall spent five days repairing it. When it failed to reach the required 10 miles per hour (16 km/h) on its first tests the next day, it was withdrawn from the trial. It was granted a £26 consolation prize.

Sans Pareil nearly completed the trials, though at first there was some doubt as to whether it would be allowed to compete as it was 300 pounds (140 kg) overweight. However, it did eventually complete eight trips before cracking a cylinder. Despite the failure it was purchased by the Liverpool & Manchester, where it served for two years before being leased to the Bolton and Leigh Railway.

The last drop-out was Novelty. In complete contrast to Cycloped it was cutting-edge for 1829, lighter and considerably faster than the other locomotives in the competition. It was accordingly the crowd favourite. Reaching a then-astonishing 28 miles per hour (45 km/h) on the first day of competition, it later suffered some damage to a boiler pipe which could not be fixed properly on site in the time allotted. Nevertheless, it continued its run on the next day, but upon reaching 15 mph the pipe gave way again and damaged the engine severely enough that it had to drop out.

So, the Rocket was the only locomotive to complete the trials. It averaged 12 miles per hour (19 km/h) (achieving a top speed of 30 miles per hour (48 km/h)) hauling 13 tons, and was declared the winner of the £500 prize. The Stephensons were accordingly given the contract to produce locomotives for the Liverpool & Manchester Railway.)[3]

Rocket 150

Wikimedia Commons has media related to Rocket 150.

In 1980 the Rocket 150 celebration was held to mark the 150th Anniversary of the trials.

A replica of Novelty was built for the event, which was also attended by replicas of Sans Pareil and Rocket (plus coach). On the first day of the Trials, disaster struck. The Rocket, to the dismay of the many visitors, failed to run. It came off the rails as it was exiting the Bold Colliery sidings and buckled its 2 large drive wheels. That evening, senior staff from a local road transport company met the builder of the Rocket replica, at a Liverpool Hotel and agreed that, in the early hours of the following morning, they would urgently manufacture some steel parts (wedges) in their nearby workshops, to fix the bent drive wheel before the second day's parade commenced. At the same time, BR agreed to put a team of staff into the sidings at Bold to "straighten" the bent rails. Both activities were achieved on time and the Rocket ran successfully on the following 2 days of the Trials.

The event was also attended by:

Two Class 86 locomotives 86214 Sans Pareil[4] and 86235 Novelty[5] were painted in a variation of the Large Logo Rail Blue livery where the BR logo was replaced by Rocket 150 motif on a yellow background.

Restaging

In a recent (2002) restaging of the Rainhill Trials using replica engines, neither Sans Pareil (11 out of 20 runs) nor Novelty (10 out of 20 runs) completed the course. In calculating the speeds and fuel efficiencies, it was found that Rocket would still have won, as its relatively modern technology made it a much more reliable locomotive than the others. Novelty almost matched it in terms of efficiency, but its firebox design caused it to gradually slow to a halt due to a buildup of molten ash (called "clinker") cutting off the air supply. The restaged trials were run over the Llangollen Railway, Wales, and were the subject of a 2003 BBC Timewatch documentary.

This restaging should not be taken as accurate as there were major compromises made for television and because of the differences in crew experience, the fuel used, the modifications made to the replicas for modern safety rules, modern materials and construction methods, and following operating experience. Sensible comparisons were made between the engines only after calculations took into account the differences.

None of the replicas were without major differences from the 1829 originals.

References

  1. 1 2 3 Wolmar, Christian (2007). Fire and Steam. London: Atlantic Books. p. 36. ISBN 1-84354-629-9.
  2. ↑ Stephenson, Robert; Locke, Joseph (February 1830). "Account of the Competition for Locomotive Engines". Written at Liverpool. Observations on the Comparative Merits of Locomotive and Fixed Engines as Applied to Railways (PDF). Philadelphia: Carey & Lea (published 1831). p. 107. Retrieved 2008-08-30.
  3. ↑ Wolmar, Fire and Steam, pp. 36-37
  4. ↑ Marsden, Colin (1981). Motive Power Recognition :1 - Locomotives. Shepperton: Ian Allen Ltd. p. 133. ISBN 0-7110-1109-5.
  5. ↑ Nixon, Les (1983). BR Colour Album. London: Jane's Publishing Company Limited. p. 11. ISBN 0-7106-0287-1.
Wikimedia Commons has media related to Rainhill Trials competitors, Novelty (locomotive), Novelty (locomotive) (replica), Sans Pareil (early locomotive), Stephenson's Rocket and Stephenson's Rocket replicas.
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