Report from the Select Committee on Steam Carriages/AppF
Appendix (F.)
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| Parts On which the Experiments were Tried. |
Number of Observations. | Rate of Inclination. | Header text | Correction for the Rate of Inclination. | Header text | Observations. All these Experiments were made in the middle of the month of March 1830, during dry weather. |
|---|---|---|---|---|---|---|
| Between brick house and road to Northampton | 7 | rise, 1 in 21 | 292 | 112 | 180 | 5½ inches limestone, high hedges, and bank on south-west. |
| Over small embankment above brickhouse | 22 | rise, 1 in 22¾ | 343 | 103 | 240 | 6 inches limestone, high hedges, new stone, on a week. |
| Between sand pits and road to Stowe | 23 | rise, 1 in 39 | 128 | 66½ | 67½ | 6 inches limestone, open and low fences. |
| Between road to Stowe and the Angel inn | 37 | rise, 1 in 71½ | 95 | 33 | 62 | 5 inches limestone, open wide space between, low fences. |
| Between hollow and 66th milestone | 70 | rise, 1 in 31 | 130 | 76 | 54 | 3½ inches of Hartshill, and 2 inches of limestone, on pitching. |
| Between 66th mile-stone and summit of hill | 80 | rise, 1 in 26 | 145 | 91 | 54 | 3 inches ditto ditto, over embankment. |
| Rising next hill | 60 | rise, 1 in 50 | 90 | 47 | 34 | 5 in ditto, ditto, through cutting. |
Extract from Mr. Telford's Report on the State of the Holyhead and Liverpool Roads.
Being authorized by the Commissioners to have the Machine invented by my assistant, by Mr. Macneill, (for measuring the force of traction, or the labour of horses in drawing carriages) completed, and also to have the several Districts of the Holyhead Road in England tried by it; Mr. Macneill has done so, and prepared a Statement, showing the results of the trials between London and a distance os 153¼ Miles.
| 1.— | On a well made pavement, the draught is | 33 lbs |
| 2.— | On a broken stone surface, on old flint Road | 65 lbs. |
| 3.— | On a gravel Road | 147 lbs. |
| 4.— | On a broken stone Road, upon a rough pavement foundation | 46 lbs. |
| 5.— | On a broken stone surface upon a bottoming of concrete formed of Parker's cement and gravel | 46 lbs. |
The general Results of Experiments made with a Stage Coach[2], on the same piece of Road, on different Inclinations and at different Rates of Velocity, are given, from which
| Rate of Inclination. | Rates of Travelling. | Force Required. |
|---|---|---|
| 1 in 20 | 6 miles per hour. | 268 lbs. |
| 1 in 26 | 6 miles per hour. |
213 lbs. |
| 1 in 30 | 6 miles per hour. |
165 lbs. |
| 1 in 40 | 6 miles per hour. |
160 lbs. |
| 1 in 600 | 6 miles per hour. |
111 lbs. |
| 1 in 20 | 8 miles per hour. |
296 lbs. |
| 1 in 26 | 8 miles per hour. |
219 lbs. |
| 1 in 30 | 8 miles per hour. |
196 lbs. |
| 1 in 40 | 8 miles per hour. |
166 lbs. |
| 1 in 600 | 8 miles per hour. |
120 lbs. |
| 1 in 20 | 10 miles per hour. |
318 lbs. |
| 1 in 26 | 10 miles per hour. |
225 lbs. |
| 1 in 30 | 10 miles per hour. |
200 lbs. |
| 1 in 40 | 10 miles per hour. |
172 lbs. |
| 1 in 600 | 10 miles per hour. |
128 lbs. |
Having the results of these accurate trials to refer to, leaves it no longer a matter of conjecture in what manner a Road should be made, to accomplish most effectually the main object, that is, diminishing to the greatest possible degree the labour of Horses in draught.
Although the observations of scientific persons have lead to nearly similar conclusions, others have been in the habit down rules for Road-making at variance with all the established laws of motion; it is satisfactory to be able to produce a positive Proof by actual Experiment, of their opinions being wholly erroneous.
In this view, I consider Mr. Macneill's Invention for practical purposes on a large scale, one of the most valuable that has been lately given to the Public.
The End