PegroPro:
Steam engines never had any transmission to change direction. The direction in which an engine's crankshaft rotates is determined by the "lead" of the eccentric which moves the valve controlling admission and exhaust of steam from the cylinder. In the youtube, you will see the engine stop for an instant, and a set of links slides cross=wise, then the engine re-starts in the opposite direction. We refer to the mechanism which controls the "timing" of a steam engines valve(s) as "valve gear" or "valve motion". Marine steam engines in the USA commonly used what is known as "Stephenson's Link Motion". In Stephenson's Link Motion, there are two (2) eccentrics to work the steam valve on each cylinder. Each eccentric is setup with lead (advance before dead center on the piston at each end of the stroke) to cause the engine to rotate in a particular direction. One eccentric is the "ahead" (forward) and the other is the "astern" (reverse). No gears, no shifting, no clutches.
A steam servomechanism was used to "throw the links" on engines of the size of the one in this film. The steam ram moved the links to wherever the engineer set the control lever. Not only could the engineer control the direction in which the engine was turning, but could also control the "cutoff" point- the point during each stroke at which the admission of steam stopped or was "cut off". Once cutoff occurred, the steam within the cylinder had to continue pushing the piston by it own expansion. An engine might be started with what is known as a "late" cutoff, using lots of steam and maintaining almost full boiler pressure in the cylinder thru much of the stroke. Once the engine came up to speed and the vessel settled into its cruising speed, the engineer could "hook up" the engine. Hooking up was an old term for adjusting the cutoff so it occurred earlier in the stroke. Less steam (and less fuel) were used, and the steam was used more expansively in the cylinders.
On a harbor ferry, chances are the engineers did not have much chance of "hooking up", and had the engines running at a fairly late cutoff. A good marine engineer could watch his engine and when the high pressure (HP) crank was at or nearing dead center, he could reverse the engine's rotation without closing the throttle.
This was often done in emergencies where a vessel had to have its speed checked in a hurry to avoid a collision.
As Paul notes, when a recip marine steam engine went from "ahead" to "full astern", the whole vessel shook. I've been in engine rooms when a ship was manuevering. Going to full astern from even slow ahead would cause the whole engine room to shake, and you'd hear the glasses in each pressure gauge rattling and see stuff on the watch desk start moving around if you were at the watch desk of manuevering station. The engine would "knuckle down" and give it all she had in her.
The old expression on the steam vessels, particularly the ferries in NY Harbor was: "full ahead with a jingle". The jingle meant the "jingle bell" was pulled, which was a signal beyond the normal engine telegraph to give all the turns the engine could make.
I was down in the engine room of the "Hart" when she was at South Street Seaport. South Street Seaport is a place which shall live in infamy. They were given a number of working steam vessels, including the steam tug "Matilda" which arrived under her own steam, the last steam lighter in NY Harbor (the "Aqua"), the "General Hart", and a Hudson River Dayline paddle steamer. South Street Seaport had their minds on sailing vessels and paid no attention nor put much, if any, effort into the steam vessels. Every last one of them either sank at the pier (Matilda, twice) or wound up as a derelict or scrap.
Of the steam vessels donated to the South Street Seaport Museum, the steam tug "Matilda" is the only survivor. She was set on blocks on dry land at the Hudson River Maritime Museum in Kingston, NY. The odds of "Matilda" ever going back into the water, let alone being put back in steam, are non-existant. To my knowledge, just about all the steam ferries in NY Harbor were eventually scrapped. Some wound up as floating restaurants for some years, but eventually, either the waterfront realestate was too valuable or the old hulls needed too much maintenance (drydocking) to remain afloat.
In about 1962-64, Conrad Milster and a business partner named Miles Rosenthal bought one of the Beacon-Newburgh (NY) ferries named "Orange", for Orange County, NY. "Orange" was a small coal fired ferry and her USCG certificate was still in force when Milster and Rosenthal bought her. I believe they paid about 1200 bucks. They got a crew of licensed people pulled together and took the Orange downriver under her own steam with coal that was left in her bunkers. The plan was to keep the "Orange" as a working historic vessel. They tied her up at a pier in (or near) Jersey City, NJ. Despite their best efforts to secure the vessel by means of locks, chains, welding companionway doors shut to the engine room, etc, the Orange was severely vandalized. Anything that was either a nautical antique like the ship's wheels, engine telegraphs, clocks, etc all were stolen. The vandals had a field day in the engine room, taking all the brass or bronze fittings, bearings, copper buss bars on the old live front switchgear, and anything else they could sell for scrap.
Milster & Rosenthal apparently had a pretty good idea that crooked cops were either turning a blind eye to the thefts and destruction, or were in on it. They removed some of the gratings in the engine room, figuring it was pitch dark and anyone going into the engine room had no business being there. Sure enough, a thief took a bad fall thru the opening where the grating was removed. There was hell to pay, as the thief was possibly a Jersey City cop or connected to them in some way. I think that Rosenthal had to pay the thief's medical bills to make the matter go away. The end result was Milster and Rosenthal had to get a tugboat to tow the "Orange" to the old layup basin somewhere on the NJ shore behind the Statue of Liberty. There, the rest of the scrapping of anything saleable continued until the Orange was a floating hulk.
Conrad Milster kept some of the old "Orange" in the Pratt boiler room, parts of the engine's valve gear and some of the signage that had been on the ferry. He also had a kind of engine room telegraph which had "Beacon" and "Newburgh" on it. This was to tell the engineer which direction the ferry would be going, since the engineer was "down below" and might otherwise not know which way was "ahead" or "astern". A ferry like the "Orange" was double ended, so there really was no formal bow or stern, and no "ahead" nor "astern" in the normal sense. Ahead or astern on the engine was determined by which end of the ferry was pointed at the destination.
Years ago, on the Great Lakes, people who were being examined to ship on the ore boats, whether as deck or engine department, were sometimes asked a trick question by US Coast Guard marine inspection officers. The question, which threw a lot of people a real curve was: "On a double ended ferry boat, which end is considered the
bow ? The answer is: "Find number 1 lifeboat. It will be on the starboard side of the bow. Number 1 lifeboat will determine where the bow is on a double ended ferry".
If you go in the wheelhouse of a double ended ferry, the engine telegraphs will have the usual "ahead" and "astern" positions. Down in the engine room, it is a whole other matter, since "ahead" in one direction of travel is "astern, and if ferry is crossing in the opposite direction, what was "ahead" is now "astern". Conrad had the old telegraph that showed whether the "Orange" was headed from Beacon over to Newburgh (approximately west bound) or from Newburgh to Beacon (approximately east bound).
Here in the USA, we have done a very good job of letting our historic steam vessels fall into decay or simply go for scrap. In Europe and England as well as Australia and New Zealand, quite a few larger steam vessels are preserved and actually in steam on a regular basis. With the exception of a Liberty Ship on each coast, we really do not have much in the way of preserved/active steam vessels here in the USA. I've been involved with the efforts to bring the steamer "Columbia" (ex Bob-Lo island excursion steamer/ferry) to Kingston, NY. The "Columbia" may well be the last of the real classic "high stack" excursion steamers and has a good chance of being returned to steam. It's a question of money, running into the millions of dollars. The people who are running the foundation to restore and operate the "Columbia" are people who have worked on tugs and know the real picture. The result is they do not spend money they do not have. Columbia was drydocked in Toledo, OH and her hull was surveyed and repaired. Her hull is sound following the repairs in Toledo, which included replacing some of the plates and some partial replacement of some of the frames. Columbia was towed to a berth in Buffalo, NY. I was asked to take a look at her boilers (original ca 1901, 2 furnace Scotch Marine boilers). I had the last ultrasonic thickness readings on the boilers and ran the calculations. Boilers are in surprisingly good condition, needing new tubes and new uptake sheet metal (water down the stack took its toll). Her machinery (original triple expansion main engine and most of the original auxiliary machinery) is also in excellent condition.
The problem lies with Columbia's superstructure. A kind of "exoskeletal" framing using steel was used to support a wood superstructure. The wood superstructure is mostly rotted out beyond any reasonable repair. Columbia is too wide (she has a main deck which projects quite a distance off each side of the hull) to come down thru the NYS Barge Canal. She will have to come to the Port of NY and up the Hudson River to Kingston via the Welland Canal and then the St Lawrence Seaway, then an ocean tow down the coast. Towing the old vessel with the rotted superstructure on the open sea is not going to happen. She will have to be loaded onto a semi-submersible barge for transit to Kingston, NY. Naval Architects are reviewing the stability of the Columbia is she were loaded on a semi-submersible barge, as to how heavy a sea she could safely withstand. The big issue is the old rotted wood superstructure. The obvious thing is to remove it, but if the old superstructure is removed in its entirety, then the historic vessel status is lost and the replacement superstructure has to conform to current regulations. Meanwhile, until funds are raised for the semi-submersible barge and tow to the Port of NY, Columbia sits at her berth in Buffalo.
My own hope is that Columbia is returned to steam while Conrad Milster is still amongst the living so he can take a hand in the startup and running of the vessel.