Started by jamespetts, May 28, 2020, 11:17:56 PM
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Quote from: freddyhayward on May 29, 2020, 02:21:16 AMI have generally used Irish Draught horses for stagecoaches, because the improved speed of other horses tends to be negated by slower climbing hills and being delayed by slower traffic, although I don't know how large this effect is.
Quote from: jamespetts on May 29, 2020, 01:54:22 PMThe long-term solution is a better system for overtaking, however.
Quote from: Ranran on June 15, 2020, 09:31:18 AMI increased the number of horses for freight and mail to run at 10km/h, but it seems that horses running at 6km/h often obstruct the running, and the cost for that is almost useless.
Quote from: Freahk on May 29, 2020, 09:14:29 PMIf I recall correctly, that threshold is 10 km/h.
Quote from: jamespetts on July 04, 2020, 10:41:44 AMAs to them being singular, this is intended: because of the much lower friction coefficient on rail, a coach that would take six horses to pull on a road could be pulled on rails by only one. This was how horses were used in the brief and not very geographically extensive railway stagecoach era, which is why single horses are available.
Quote from: Freahk on July 04, 2020, 08:45:11 PMIs 200 km enough to call this an intercity route?
Quote from: Vladki on July 07, 2020, 06:28:45 PMRailway horses cannot run in pairs (side to side) because of the tracks
# These values are not fine enough to capture# the differing power of different horses.# See http://gluedideas.com/content-collection/Textbook-on-Roads-and-Pavements-1908/Tractive-Power-of-Horses.html# (also reproduced at https://archive.org/stream/textbookonroadsp00spalrich/textbookonroadsp00spalrich_djvu.txt)# for information: an average horse will have a tractive effort# of 80lb/f, or 0.33kN at approx. 5km/h and an average power of 0.45kW.
QuoteThe tractive force that may be exerted by a horse, at moderate speeds, varies approximately inversely as the rate of speed ; or, in other words, the power that a horse can exert through any considerable time is nearly constant for varying velocities.
QuoteThus it may be assumed, as an average value, that a horse working regularly ten hours per day can put forth a tractive effort of 80 pounds at a speed of 250 feet per minute on an ordinary level road surface. For the power of the horse we then have Power force X velocity = 80 X 250 = 20000 foot-lbs. per minute. For any other rate of speed, as 200 feet per minute, we would have 20000 -f- 200 = 100 pounds as the tractive force exerted by the horse.
Quote from: jamespetts on July 22, 2020, 10:23:48 PMPerhaps the ploughing tractive effort might be the right place to start after all if it is closer to the starting tractive effort?
Quote from: jamespetts on July 22, 2020, 10:23:48 PMI suspect that the apparently excessively weak character of horses was caused by using the continuous rather than the starting tractive effort and tripling the tractive effort appears to be a sensible place to start for calibrating to a probable starting tractive effort.