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Many a case of beer these things cost me for blowing a relief valve on standby

Loved this type of B&W engine, sailed on the Rockhampton Star with a single engine opposed piston engine identical to these ones. Also sailed on ships with Doxford engines, my first trip as an engineer cadet was on the Brasilia Star that had two five cylinder Doxford engines.

Harland & Wolf not Doxfords

i wonder if anybody ever tried to ride those at low rpm ? (probably 🤣)

I am workiong on a case study for Doxford type engines can anyone tell me how to obtain a service manual for Doxford "P" type engines. TIA

Doxford engines were built in numerous places around the world under licence: Barclay Curle, Fairfield, David Rowan, Alexander Stephen, John Brown on the Clyde. John Lewis, Aberdeen. Swan Hunter, Vickers Armstrong, Hawthorn Leslie, Wallsend Slipway, North Eastern Marine on the Tyne. Central Marine and William Grey on the Tees. Ansaldo, Italy, Wilton Fijenoord, NDM in Holland, Eriksberg in Norway, Taikoo in Hong Kong. CMEW in Australia One of the first, if not THE first licencee was Sun Shipbuilding of Pennsylvania whose first Doxford was an aluminium twin bank engine for a yacht owned by Henry Ford. He had the original steam engine removed and the Doxford built and installed, the yacht was renamed Sialia and was used by the American Coastguard . It operated until the 1960s. After the yacht, Henry Ford had standard Doxford engines installed in two Great Lakes bulk carriers Henry Ford 2 and Benson Ford. The first type of Doxford “Oil” engine was the L followed by the LB ( B for Balanced when the upper and lower piston strokes differed to improve balancing ). Variants of the LB were LBD (D for diaphragm fitted in the entablature, around piston rod to reduce contamination of lib oil from products of combustion, the LBDS ( S for supercharged), The LBDSSC SC for short centres when Doxford tried to reduce the length of the engine by using radiuses fillets on the crank webs so the distance between the cylinder centres were reduced, the LBDCS (CS for central scavenge pumps in line with the cylinders instead of the rear mounted, external scavenge pumps. To address the need for higher powered engines a new type of engine was built and fitted into a tanker built at Laings yard, the Montana, this was the P type where P was for Percy, the designer, Percy Jackson. This was not a success. The proto type built at Palmers Hill was sent to South Shields Marine and tech college until it was dismantled and sent to the Anson museum. In 1965 the J type ( J for Jackson, as in Percy), was installed into a tanker built at Thompsons, North Sands yard and called North Sands, and built at Doxfords expense. The 760J 9 in the North Sands was taken in charter by Jacobs and would compare with the similar tankers built at Thompsons but with Sulzer engines (British Commerce, Donacilla and Daphnella. A joint venture with Hawthorn Leslie saw the G type design. G was for geared. This was a medium speed engine that could be multiple engine installations on land or sea but would need to be geared for propulsion purposes. The engine was known as the Doxford Seahorse( Seahorse was Hawthorns house flag ). Only a prototype was built and scrapped after 5 years of development without any engines entering service. Components from the Seahorse were used in a series of Three cylinder engines fitted into Furness Withy and Ellerman ships . The engine that was never sold was taken to Beamish Open air museum where it languishes despite lottery funding, due to a lack of vision and a spat between the museum and Tyne and Wear museums. Doxford volunteers ( Doxford Engine Friends Association), are now forbidden to work on the engine for preservation purposes. The last Doxford engine 4 cylinder J type was built at Pallion, Sunderland, the home of Doxfords for another Great Lakes ship, the Canadian Pioneer

Top 2ater cooled pistons

Top level with top water cooled pistons,

The engine I worked on for 15 months all around the world.

Served for some time as an engineer with Ellerman lines in the late 50's and early 60's. We had twin 6 cylinder Doxfords and single 6 cylinder Doxfords. Some of the later ships had 6 cylinder Sulzer engines. When I was serving my time we built Doxford engines under licence.

Splendid diesel for a fine ship: the Danae

Seen a lot of engines but this is the first time for this .

I served my apprenticeship at Doxfords and never looked back . The apprentiship i served held me in good stead im still working at 75 the memories i have lived it all so much and will always be proud to be a Doxford Marine Engineer

Sorry if I'm stupid. But what's a stabilizer?

It's a Big & Wonderful 🤣

Not Doxford - Certainly a Harland & Wolff B&W - I sailed on 2 vessels, as Engineer, the mv Arawa and mv Aranda with Shaw Saville Line 1969-1970

As a 12 year old boy on the RMS Rangitoto in 1961 I was lucky to get a tour of the engine room. I recall following the drive shafts towards the stern. Factoids that remain with me are 110 rpm and 3’6” bore. 17.5 knots. On C Deck amidships the rhythmic percussion of the exhaust stack is a sound that I can still hear. After an engine stoppage somewhere near Curacao, looking over the stern, the ship drifted visibly without power for 30 minutes. Then from the funnel a spectacular series of huge white smoke rings on startup. Recently I spoke with a marine engineer who recalls the Doxfords were designed for diesel but when run on bunker oil there was a lot of maintenance required.

God saved me from that treasure

That's... is an engine...? But it's only one dang minute!!!

The top piston stroke is 14 3/16" and the bottom piston stroke is 32 1/4". The cylinder diameter is 20 7/8".

Beautiful. Those were the days.

Is it supposed to be doing that our did they not put in head bolts? It kind looks like a carnival ride.

Looks like same of buurmaister & wain

B and W Exhaust Piston. Not Oposed Piston. The main purpose of the upper piston was to open and close the exhaust ports

IMO No.: 5282483 Originally built as PORT MELBOURNE at Harland & Wolff - Belfast (Yard No.: 1483) Engines 2 x 6 Cyl. Harland & Wolff - Burmeister & Wain.

Amazingly quiet.

LBD Doxford engine worked on this engine as apprentice in Pallion together with the P type and J type. Sailed with the LBD on Mv. Black Prince Furness Withy. Loved the engine apart from an occasional burst cooling hose you can see on Transverse Beam here it just kept going. I captured a Royal Navy Frigate once passing her as I was on engine controls manouvering down the Tyne on the Black Prince, too much start air and all safety valves lifted. Confirmed by the bridge to engine telephone to me on receipt of an Aldis lamp signal from the navy ship, I had supply 2 cases of Barclays Blue Beer after my watch, plus a terse tick off from the Chief. Great days though for me loved every minute.

Bob Spence is absolutely correct. This is definitely not a Doxford engine. Burmiester and Wain built an opposed piston design engine and Doxfords of Sunderland successfully won a case against them for patent infringement. The opposed piston design is the only thing the two manufacturers had in common. Doxford never used four side rods on any transverse beam from the first engine in 1921 to the last in 1979. Furthermore, the Daphne was built at Swan Hunters yard on Tyneside in 1955 as Port Sydney and not at Harland and Wolff. Launched 29 October 1954. Renamed Akotiri Express. Converted to passenger ship Daphne at Chalkis shipyard. Fitted with two Doxford 67LB6 engines by Wallsend Slipway, contract no 1048. Port Melbourne was built at Harland and Wolff, with Burmiester and Wain engines. Renamed Therisos. Converted to passenger ship Danae. A very good video is spoiled by entirely misleading information. Accuracy must be a pre requisite, NOT an optional extra.

The two pistons are the same.... Theese engines have the only problem thas is the mass who have a alternative movment are very heavy and it needs to runs absolutly slowly because vibrations..... the rest is perfect!!!...by

Hard t imagine this engine type ever got beyond first rough sketch?

I remember those cooling hoses inside the crankcase. The joys of mending leaky hoses in a hot oily sump.

That's got to be awfully scary to be around in high seas when the ship rolls on the waves, I wouldn't want to trip on that upper engine catwalk!

Yes, a B&W or as we on the Tyne called them, Flying Bedsteads.

.This is a B&W opposed piston engine. I served my apprenticeship helping to build these and others on the Clyde

not quite, a crosshead runs to main piston, rod on other end of C head to crank, this passes through bottom Ex pistons centre, top ex piston has crosshead like doxford to crank at bottom, have a look on the site there r a few wierd designs to fathom out!

Yes, that's the free piston type, no Connection rod. The Deltic is lovely by the way.It sounds like a Wolvrine is running.

look at oldengine(dot)org and write old hot bulb and marine engines after it on google, see harland and wolf.

I menat on the H&W DOUBLE acting engines, they had combustion space above and below main piston with exhaust pistons either end of cylinder with a cross head going through (3 pistons per cylinder); I know how single acting op engines work; Ive helped out with deltic repairs and my grandfather worked on doxfords and talked for hours about them; U can google the H&W OP double acting thing, its an unusual lump.

What! Where on Earth have you learned this. Combustion Chambers UNDER the piston with open to the air top and bottom? You really need to study quite a bit more on OP engines! On old single piston 2.stroke(Fairbanks Morse 1930) the underside of the piston compressed thr air sucked into the crankcase via checkvalves and pressed it to the intakeport and thereby also helped scavenging!

Oh Dear, oh Dear!

John. Powles.I served on the Ingelton which had one of these type engines although only 4 cyl. as you say watch out for the swinging link water pipes & we repaired the swan neck water pipes in situ in the crankcase with a umbrella & thistle bond with bandage round the pipe this made a good repair & was very difficult to remove. but if the leak was st the joint then "ugh" what a rotten job --those were the days.

i was second engineer way back in 1960 on a 3 cylinder job.the ship had been sunk in the war and was resurrected. i sailed on lot of other engines but cud never forget a DOXFORD.the worst experience ever was a stud coming loose in the top piston and cracking the skirt and that too in heavy weather.

@bayoulimey actually I stand corrected, the H&W engine has 2 big pistons and 1 or 2 smaller pistons controlling exhaust ports that R just bigger than piston rods.

@bayoulimey I have seen harland and wolf , and B&W double acting engines, they used 2 pistons per cylinder just the piston rod sealed the combustion spaces on underside of pistons. Under piston scavenging is rare I think; the sulzers i have seen used turbo and smaller scavenging pistons in paralel to main cylinders.

I'm trying to get this all straight . The Danae has Burneister & Wain designed engines built by Harlan & Wolff The Daphne has Doxford built engines ? At least some other video's show the lower levels of the Daphne engine room with Doxford emblems on the machinery ? Am I correct with this ? At any rate they both are very neat ships and the vedeo's are great !

@bayoulimey correction one combustion space between pistons.

@bayoulimey if it has 2 combustion spaces it must be double acting, if single acting OP engine it has one combustion space between cylinders, if double acting it fires on both sides of one or both pistons- how can u have 3 pistons in one cylinder?????

@bayoulimey so how does it scavenge on start up when turbo/s are not turning? I have seen some large 2 strokes with superchargers or turbo's and extra scavenge pistons, is that the case here?

@tpvalley Who knows the battle between Doxford and Harland & Wollf concerning patent problems? Alfons

L.S I noticed that the name of this video "DOXFORD TYPE ENGINE ,gave a lot of confussion instead of HARLAND & WOLFF B&W Opposed Piston Engine Alfons