Modern Tramway Journal included a short article in October 1963 about developments in 1899 on the Isle of Man, and particularly about the use of ‘Bonner Wagons’ by the Isle of Man Tramways and Electric Power Company Limited. [1]

An item about ‘Bonner Wagons’ in the “American technical Press attracted the attention of Mr. Alexander Bruce, Chairman of the Isle of Man Tramways and Electric Power Company Limited, the predecessors of the Manx Electric Railway. Mr. Bruce was engaged in promoting and constructing a 10-mile extension of the coastal tramway from Laxey to Ramsey, and this line was intended to enter Ramsey along the seafront and possibly terminate at the pier, where freight could have been transhipped direct to and from cargo steamers without the expensive carriage necessary at Douglas. The new line also involved a rail-side steam power station at Ballaglass remote from road access. But the Ramsey Town Commissioners would not allow the sea-front route, and Mr. Bruce was forced to adopt instead the inland route and terminus which we know today. This line was opened to Ballure on 5th August, 1898, and into Ramsey on 24th July, 1899.” [1: p350-351]

Included in the tramway promotion was a granite quarry at the Dhoon, “purchased in 1895 and staffed partly by skilled Scottish sett-makers brought over from Dalbeattie, the centre of the Scottish granite industry. Setts from Dhoon Quarry were used for paving the Upper Douglas Cable Tramway, and setts and roadstone were produced both for the island’s roads and for export to the mainland. The export trade would provide an excellently balanced freight traffic on the electric line, the rail wagons taking the setts to Ramsey harbour and returning laden with coal for the power station at Ballaglass.” [1: p351]

After the Town Commissioners had prevented the extension of the tramway to Ramsey harbour, Mr. Bruce ordered several 3 ft. gauge ‘Bonner Wagons’ from the USA, which would “travel over the tramway to the outskirts of Ramsey, and could then be transferred to road by a removable ramp at one of the several level crossings. These wagons also came in very handy to counter a demand from the Ramsey Commissioners early in 1899 for 5 per cent of the gross receipts earned on the portion of the line in their area; Mr. Bruce threatened to turn the cars back at the town limits, and pointed out that by using the Bonner Wagons in the town the Company could carry on their freight traffic as they pleased. The Ramsey Commissioners soon gave way, and in return were treated on 9th June, 1899, to a special trip from Ballure to Snaefell Summit and back.” [1: p351-352]

Increasingly after the Second World War, the practice of hauling laden road trailers and semi-trailers on flat rail carsdeveloped in North America. “In this way, the railways of North America are attracting to that share of the long-distance freight that would normally move by road, quoting long-haul charges sufficiently low to represent to the haulier a clear saving over sending the load by road throughout, with its own tractive unit and crew.” [1: p350]

In the early years of railway travel “private carriages (with or without their occupants) were often conveyed on railway-wagons in the early years of railways, and in the days when motor-cars were less reliable than they are now they would quite often cover long distances in motor car vans attached to the train in which their owner travelled a forecast of today’s car-carrier trains. This method was also used for freight vehicles such as the pantechnicons of furniture-removal firms and (of course) by the circus, but the more usual method was for freight consignment to be bulked in railway wagons or vans, the railway company providing carriage services in the towns served, with transhipment in its own terminal warehouses.” [1: p350]

In competition with the mainline railways there were interurban services which predominantly carried passenger traffic but additionally sought freight traffic if it could be handled efficiently. Often such movement attracted significant transshipment costs. “In an effort to reduce these handling costs and quote competitive rates for collection-and-delivery traffic, a few American interurbans adopted a device known (after its inventor) as the Bonner Railwagon. The Bonner Wagon was in fact two separate vehicles which could be combined in one for the rail journey. The main portion was a substantial spring-axle high-sided cart of about four tons capacity, mounted on four spoked road wheels and designed to be drawn by horses when running on the streets; the second, smaller portion was a small axle-carrying truck on four flanged solid disc type wheels, on which the cart would ride for the rail journey, and which supported the cart’s axles at a height sufficient to bring the road wheels well clear of the tracks and pointwork.” [1: p350]

The mechanism was similar to the practice espoused by some European narrow-gauge railways where standard-gauge wagons could be carried over narrow-gauge lines. A typical example would be the practice as used on the Brünig Railway in Switzerland or on the Hartsfeldbahn in Bavaria which made use of Rollbocken in the mid-20th century.

The Rollbocke was an invention by Director Langbein of the Saronno branch of Maschinenfabrik Esslingen, which supplied many European narrow-gauge railways with it. The Härtsfeldbahn had up to 28 units, but then in connection with the expansion of the Rollbocke traffic to the Aalen-Ebnat section in 1950, 16 rental vehicles from the WEG-Bahn Amstetten-Laichingen were added. In 1960 another 16 units followed from the DB route Nagold-Altensteig. [2]

The use of these Rollbocken was somewhat different in nature to the use of Bonner wagons as separate units were used for each axle of a larger-gauge wagon. Pits were provided to allow the Rollbocken to pass under the larger-gauge wagons.

The transfer of a Bonner Wagon between road and rail was done by means of a ramp at each side of the rails. In the USA, “the interurban car would shunt the wagon towards this ramp, the sides of which would offer support to the road wheels and as the move proceeded would cause the road wagon to rise clear of the rail vehicle; the latter would then be drawn out from underneath, after releasing appropriate locking devices, leaving the road wagon to be hauled by horses to its destination in the town.” [1: p350]

Although the use of Bonner Wagons “was not widespread, even in America, the method sur- vived long enough to be used in the late 1920s in conjunction with motor tractors by the Lake Shore Electric Railway, with transfer ramps in the outskirts of Cleveland and Toledo at either end of an 85-mile main-line run. Bonner Wagons could be run in trains of any reasonable length, bar couplings being provided between the projecting ends of the rail units.” [1: p350]

Returning to the Isle of Man, “when the line to Ramsey was fully operative, the Bonner Wagons settled down to a regular routine; granite setts from the Dhoon to Ramsey harbour, coal to Balla- glass power station, empty to Dhoon, and so on. The loading ramp was a removable installation, apparently used at Queens Drive crossing and not at the Ramsey Palace terminus, though even out at Queens Drive local residents often complained of the nocturnal noises caused by the shunting and transfers. It seems from this that the ramp could only be installed and used after the last passenger car had gone past at night, to be removed again before the first car in the morning. … Another ramp was installed at Derby Castle (Douglas) to perform the same rites as at Ramsey for journeys to and from Douglas harbour, and also for general freight traffic in the town.” [1: p352]

So far as we know, the three Bonner Wagons on the Manx Electric Railway, survived for about 20 years. They were probably the only example of ‘Piggy-back’ vehicles on any British tramway or electric railway. Pearson & Price commented in 1963 that, at that time, the Bonner Wagon name “live[d] on … in an unexpected way, for the Derby Castle layout include[d] one siding that [ran] all alone behind the car shed nearest to the sea-front, and … that piece of track [was] known to the staff as the ‘Bonner siding’. The Dhoon granite quarry finally closed down in 1961, having belonged to the Highways Board for many years.” [1: p352]

References

1. F.K. Pearson & J.H. Price; ‘Piggy-Back’ in 1899; in Modern Tramway and Light Railway Review, Volume 26 No. 2, Light Railway Transport League and Ian Allan, Hampton Court, Surrey, October 1963, p350-352.
2. https://www.hmb-ev.de/fahrzeuge/rollbock-2, accessed on 24th August 2023.
3. http://justacarguy.blogspot.com/2018/07/bonner-road-rail-wagons-something-ive.html?m=1, accessed on 24th August 2023.
4. https://www.lakeshorerailmaps.com/clevelandfreight_3.html accessed on 24th August 2023.