It became obvious that, for all the Fairlie locomotive's advantages, its disadvantages outweighed them.

One of the major advantages of the Garratt form of articulation is the maintenance of the locomotive's centre-of-gravity over or inside the track centre-line when rounding curves.

In order to prevent this, when applying the gear to the Pacifics, Gresley fell back on the expedient of shortening valve travel even though that choked the exhaust at speed, was responsible for the heavy coal consumption, and negated most of the advantages gained by the locomotive's revolutionary design.

In addition the diesel generator and battery package are normally built on an existing " retired " " yard " locomotive's frame for significant additional cost savings.

Their task, low-speed drag haulage, was the diesel locomotive's forte.

In both cases, the proper voltage is provided by the locomotive's main transformer or an AC alternator in diesel locomotives.

This locomotive's specific 44-short ton weight was directly related to one of the efficiencies the new diesel locomotives offered compared to their steam counterparts: reduced labour intensity.

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.

Ephriam Shay's locomotive patent of 1881, for example, used double universal joints in the locomotive's drive shaft.

His grandson Julian Huxley in 1926 compared " vital force " or élan vital to explaining a railroad locomotive's operation by its élan locomotif (" locomotive force ").

The impact of the accident caused the locomotive's tender to flip over the locomotive and rip the cab away from the engine, thereby killing the crew.

He had become convinced that the conventional pattern of locomotive was seriously deficient ; they wasted weight on unpowered wheels ( the maximum tractive effort a locomotive can exert is a function of the weight on its driving wheels ) and on a tender that did nothing but carry fuel and water without contributing to the locomotive's adhesive weight.

First, the guard would use the brake van's brakes to assist with keeping the train under control on downwards gradients and whenever he could see the locomotive's crew was attempting to slow the train ; second, the brakes were left set on at a low setting all the time to ensure the loose chain couplings often used between unfitted cars were kept taut, to minimise the risk of snapped coupling chains from the locomotive " snatching " or jerking, which was particularly problematic in the days of steam locomotives.

In this design, used in earlier and smaller locomotives, the water is stored in a ' well ' on the underside of the locomotive, generally between the locomotive's frames.

A tender or coal-car is a special rail vehicle hauled by a steam locomotive containing the locomotive's fuel ( wood, coal, or oil ) and water.

The sugar companies retained the locomotive's last Southern Pacific number, 216, and other than painting out the Southern Pacific lettering, probably made no other noticeable changes in the locomotive.

A scoop is fitted to the underside of the locomotive's tender ( or the locomotive itself in the case of tank locomotives ) in such a way that it can be raised or lowered, by a screw mechanism or a compressed air mechanism.

On a steam locomotive, a driving wheel is a powered wheel which is driven by the locomotive's pistons ( or turbine, in the case of a steam turbine locomotive ).

For example the " front coupling bug ", where the locomotive's front coupler would not work, the " white void bug ", where the route scenery disappears, leaving a white void, and the " end-of-the-line bug ", where the locomotive, if it crashes through the last buffers on the route, would fall into an empty void.

These errors were corrected and the opportunity taken to incorporate some other improvements, including the previously recommended Kylchap exhaust system, which has finally unlocked the locomotive's true potential as a powerful express passenger locomotive.

It later emerged that the locomotive's renumbering was allegedly due to a warning given to BR by a clairvoyant who claimed to have foreseen a serious accident involving a locomotive numbered 47216.

After being on static display for the next 42 years, the Smithsonian commemorated the locomotive's 150th birthday in 1981 by firing it up, making it the world's oldest surviving operable steam locomotive.

For the 4-2-0, Jervis introduced a four-wheel leading truck under the locomotive's smokebox that swiveled independently from the main frame of the locomotive ( in contrast to the English engines mentioned earlier, which had rigid frames ).

Investigations revealed that the location of a water tank within the locomotive may have caused excessive swaying while the locomotive traversed crossovers at high speeds, shifting the locomotive's center of gravity and forcing it to overturn onto its side.

The BL in the locomotive's model name officially stood for " Branch Line ", indicating that EMD felt the locomotive was best suited for light traffic and frequent switching chores.

This model of locomotive was sold for both freight and passenger service and the locomotive's intended purpose could be easily identified by the presence or absence of an exhaust stack between the two windshield panes.

The locomotive's carbody lacked the full-length walkways of subsequent GP diesels, making it difficult for the brakeman or switchman to move from one point on the locomotive to another during switching operations.

In rail terminology, backhead refers to the wall of a steam locomotive's firebox in the cab of the locomotive.

The locomotive livery featured the Santa Fe's Yellowbonnet with a red stripe on the locomotive's nose ; the remainder of the locomotive body was painted in Southern Pacific's scarlet red ( from their Bloody Nose scheme ) with a black roof and black extending down to the lower part of the locomotive's radiator grills.

This all-new digital system captured a real-life locomotive's actual sounds, and propelled Lionel to the forefront of model train technology.

European electric locomotive's technology had improved steadily from the 1920s onwards.

The locomotive's electrical drive technology is directly derived from the SNCF BB 36000 manufactured by Alstom.

Because # 1801's cab had been reconstructed prior to filming, the ' 531 ' prosthetic hood stood slightly higher than the normal hood height of a GP7 in order to fit over the locomotive's number-board.

One of the first tests of HEP powered by an EMD locomotive's prime mover was in 1969, on Milwaukee Road EMD E9 # 33C, which was converted to have a constant speed rear engine.

Firstly, and most importantly, the guard would use the brake van's brakes to assist with keeping the train under control on downwards gradients and whenever he could see that the locomotive's crew was attempting to slow the train.

The locomotive's styling was reminiscent of American locomotives ( partly because English Electric initially planned to offer the type for export ) with high noses and small, somewhat swept-back cab windows set back behind them ; to add to the American look of the locomotive to British eyes, a large headlight was to be fitted to each nose ( these lights were never installed but would have been of the rotating ' Mars Light ' type as fitted to North American locomotives of the era ).

The problem now arose that with a cab floor at the then standard tender deck height, it would be impossible for the locomotive's engineer to see forwards around the firebox shoulders.

With such a large order to be completed it was felt that a redesign of these areas would have a cost savings in the long run, in addition to a better working environment within the cabs, and with a general less cluttered look about the locomotive's exterior.

However, with the parts ' origins still in question, and the lack of a few other key parts, the locomotive's reconstruction has never been completed.

" Blasphemy " may be used as a substitute for " profanity " or " cursing " as it is used in this sentence: " With much hammering and blasphemy, the locomotive's replacement spring was finally fitted.

:( from time to time a locomotive's older or newer number and livery might be used )

Tractive effort can be theoretically calculated from a locomotive's mechanical characteristics ( e. g., steam pressure, weight, etc.

A technical innovation was the trailing axle which had been intended by Schubert mainly to improve the locomotive's riding qualities. It was subsequently determined to be superfluous and was removed in 1840.

These are intended to investigate how much further the locomotive's performance can be enhanced, therefore raising speculation surrounding the capabilities of an entire batch of Standard class 8 " Pacifics " had history been different.

Since the engine inside the locomotive's hood didn't take up the full carbody width, it seemed only logical that the hood could be " cut away " a bit to allow the crew to see and ride safely.

The 2-8-2 wheel arrangement allows the locomotive's firebox to be placed behind instead of above the driving wheels, thereby allowing a larger firebox that could be both wide and deep.

The historical significance of City of Truro led to the locomotive's survival after withdrawal from service, with the GWR's Chief Mechanical Engineer Charles Collett asking that the engine be preserved at the London and North Eastern Railway's Railway Museum at York when she was withdrawn in 1931, after the directors of the GWR had refused to preserve the engine at the company's expense.

If the locomotive's engineer does not detect and rectify this situation at once two things will occur, first, the metal tires that surround the driving wheels will be seriously damaged ; second, the piston rods, their bearings and the other equipment associated with the reciprocating motion of the engine will be overstressed and destroyed ; the engine will literally tear itself apart, by its operation at speeds well beyond the design limitations.

The HEP generator can be driven by either a separate engine mounted in the locomotive or generator car, or by the locomotive's prime mover.

The locomotive's boiler was found to be life-expired, and it was found cheaper to order a new boiler made ( for £ 70, 000 ) in 2007.