The Two-Stroke Engine | Shell Historical Film Archive

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  • Опубліковано 30 січ 2025

КОМЕНТАРІ • 139

  • @shell
    @shell  Рік тому +28

    If you enjoyed this video, please check out the full 'Shell Film Unit - Historic Archive' playlist, where you'll find lots more gems!
    ua-cam.com/play/PLEPIVJVCFQH2hoYONdHiQlVrvYQ-k4Xay.html

  • @lauramildon-clews7850
    @lauramildon-clews7850 8 місяців тому +19

    I have been a marine engineer for over fifty years. Two stroke diesels are the most efficient power plant that could ever be used. I have worked on all types and still hold great affection for their efficiency and simplicity

    • @prophetsnake
      @prophetsnake 8 місяців тому +1

      Well no, they aren't.

    • @iandennis7836
      @iandennis7836 2 місяці тому +2

      ​@@prophetsnakeof all the IC engines, the modern marine 2 stroke is the most efficient ever produced at I think 50+% thermal efficiency....

    • @prophetsnake
      @prophetsnake 2 місяці тому

      @@iandennis7836 so? That doesn't make you right, fjuktard.

    • @eddkennedy6458
      @eddkennedy6458 15 днів тому

      The Rootes group made the ts3 a 6 piston opposed piston 3 cylinder two stroke diesel it was way ahead in power and very fuel efficient

  • @marcelolinhares8233
    @marcelolinhares8233 Рік тому +31

    One of the best explanitions os two stroke engines i ever whatch in my life.
    Congratulations!!

  • @Tom-Lahaye
    @Tom-Lahaye Рік тому +9

    The most comprehensive explanation of the working of every kind of two stroke I have seen yet.
    Having been working on a couple of the two stroke types of diesel engines, the Crossley HSTV8 cross flow engine and the famous Napier Deltic in preservation, this was a joy to watch.
    One thing that missed out from the explanations was two other reasons why a multi cylinder two stroke diesel doesn't use crank case scavenging.
    Not only would the pressure be to low, but because every cylinder needs it own sealed crank case volume for this to work, in a shared crank case volume two pistons going opposite directions would cancel each its air displacement out.
    This would be not very practical as you would need pre mix lubrication, but you can't lube a diesel with pre mix as the oil in the air would prematurely ignite during the compression cycle, even when this didn't happen an engine this large would consume enormous amounts of oil this way.
    Second reason is that there is always back pressure in the exhaust manifold because such an engine uses a collector header instead of separate exhausts as on a motorbike.

    • @brianb-p6586
      @brianb-p6586 Рік тому +1

      Separation of crankcase volumes is not a problem for inline engines, regardless of size.

  • @andrew353w
    @andrew353w Рік тому +7

    A very helpful video! I owned a 1974 Wartburg car a few years ago and never really fully understood the 2-stoke principle. This video has clarified things-thanks!

  • @WmArthur
    @WmArthur 11 місяців тому +15

    I really enjoyed my 1972 Kawasaki 750 triple 2 stroke, modified from about 75 hp stock to about 115 hp. They were known as the widowmaker back then, fastest production bike made in 1972. It would do power wheelies at over 100 mph, I never got beat by any big 1000 or 1100 4 stroke of the day. Lucky to be alive. My RD 350 Yamaha was very quick too, legendary.

    • @cabaneencac5168
      @cabaneencac5168 10 місяців тому +1

      ''RD 350 Yamaha was very quick too'', to fool plug . I know I had a '73 purple one with a white line and for touring I always brought a box of dozen ngk.

    • @TheHalloweenmasks
      @TheHalloweenmasks 9 місяців тому +1

      Mine is the smaller 1977 KH250😁😁

    • @WmArthur
      @WmArthur 9 місяців тому

      @@cabaneencac5168 I never once fouled a plug on either of my street 2 strokes, they were not stock. Must have been an issue. Thanks

    • @WmArthur
      @WmArthur 9 місяців тому +1

      @@TheHalloweenmasks was that a 3 cylinder Kawasaki?

    • @TheHalloweenmasks
      @TheHalloweenmasks 9 місяців тому +2

      @@WmArthur Yes 3 cylinders, sounds very nice

  • @PRH123
    @PRH123 Рік тому +4

    Really cool 2 and 4 wheeled vehicles shown in the beginning.
    Very good and detailed description of 2 stroke operation.

  • @joecummings1260
    @joecummings1260 Рік тому +27

    I used to see and hear Detroit Diesels all the time. Now it's a rare occurrence to hear one

    • @BigEightiesNewWave
      @BigEightiesNewWave Рік тому +1

      I have to see them running/driving on UA-cam.

    • @brianb-p6586
      @brianb-p6586 Рік тому +3

      There are still Detroit Diesel engines, but their 2-stroke models went out of production long ago.

    • @johndavidson3424
      @johndavidson3424 3 місяці тому

      You mean "2-stroke" Detroit Diesels? Cause their modern 4-stroke Diesels aren't a rare sight, & unfortunately doesn't sound the same too.

    • @franktechmaniac7488
      @franktechmaniac7488 Місяць тому

      Because in recent studies scientists calculated that hundreds of thousands of school children got harmed by the exhaust smokes of DD engines idling with doors open.

  • @imransharif443
    @imransharif443 21 день тому +2

    Nice the two Stroke Engine The full Stroke Engine beautiful

  • @NoosaHeads
    @NoosaHeads 9 місяців тому +5

    Superb description. It's sad that, with all the power of computers, they don't teach things today as clearly as they used to.

  • @alfabethev2.074
    @alfabethev2.074 11 місяців тому +2

    Brilliant just brilliant !

  • @andrewwmacfadyen6958
    @andrewwmacfadyen6958 3 місяці тому +3

    Loved the cutaway Rootes TS3 footage

  • @simonescalici5302
    @simonescalici5302 10 місяців тому +5

    i love the mid-century peter and the wolf soundtrack to thier "educational " films.

  • @richardsimms251
    @richardsimms251 7 днів тому +1

    Look how thin and healthy these people are. They do not eat garbage food. I wish that I was thinner.
    RS. Canada

  • @OYisit
    @OYisit 5 місяців тому +2

    I am still keeping a few bikes over 50 years old but the one I miss the most was a seventies 500cc Kawasaki triple never a dull moment.. 😢

  • @davidpawson7393
    @davidpawson7393 9 місяців тому +2

    More of these videos please.

  • @quantumleap359
    @quantumleap359 9 місяців тому

    Excellent film, thanks for posting!

  • @richardsimms251
    @richardsimms251 7 днів тому +1

    Engineering does not get the respect that it deserves
    RS, MD FRCS
    Canada

  • @BigEightiesNewWave
    @BigEightiesNewWave Рік тому +6

    If the crank seal leaks even a little, you lose a ton of power. Learned that on my 1970s Yamaha 250. My friend had a Kawasaki with a rotary valve 2-stroke engine. My CR 500 from 1990 was reed-valves and liquid cooled.

    • @fidelcatsro6948
      @fidelcatsro6948 11 місяців тому +3

      Waaang waaaang ting ting ting ting😂😂😂

  • @marcostovar7968
    @marcostovar7968 Рік тому +7

    Greetings to the Royal Dutch Shell family

  • @samartz
    @samartz 2 місяці тому

    Love the sound of a 2 stroke dirt bike!

  • @chrisu3175
    @chrisu3175 Рік тому +6

    Thank you for the cool video, gassy pals

  • @madhungarian3024
    @madhungarian3024 7 місяців тому +2

    They're still alive & well in the big marine diesel world!

  • @chrismccartney8668
    @chrismccartney8668 19 днів тому

    Best explanation

  • @brianb-p6586
    @brianb-p6586 Рік тому +6

    That's presumably a Commer TS3 "Knocker" from 20:43 to 21:35.

    • @theMG174
      @theMG174 Рік тому +1

      Yes! It was a very efficient setup which Chrysler purchased to put out of business so they could sell their less efficient four stroke Diesels in England.

    • @zOiNhUh
      @zOiNhUh 3 місяці тому +1

      One of the best engines ever made

  • @andrew353w
    @andrew353w Рік тому +2

    Having watched this film a few times I think the Voiceover is done by the actor Simon Lack, although I don't see him credited.

  • @andyclark1173
    @andyclark1173 8 місяців тому +2

    I loved the ring a ding ding days

  • @jobenbarrientos4560
    @jobenbarrientos4560 9 місяців тому +2

    The Detroit 2 stroke Diesel engine story beautiful sound I like it

  • @Yosemite-George-61
    @Yosemite-George-61 11 місяців тому

    awesome! Thanks!

  • @georgestreicher252
    @georgestreicher252 11 місяців тому +4

    To my knowledge the last commercially produced two stroke was the Evinrude outboards produced by the Canadian Bombardier Corporation. By all accounts they outperformed all their competitors, but the reliability was poor. They seemed to solve the typical problems of pollution that two stokes typically have. It is a shame they stopped producing two strokes as I think two strokes could have a future.

    • @zOiNhUh
      @zOiNhUh 3 місяці тому

      KTM and Husqvarna still make 2-stroke motorcycles, now with transfer port injection which is even cleaner than direct injection.

    • @georgestreicher252
      @georgestreicher252 3 місяці тому

      @@zOiNhUh They should try making an outboard boat engine.

    • @stephenh1251
      @stephenh1251 3 місяці тому

      I would say the majority of snowmobiles sold are still 2 strokes as well.

  • @ophthojooeileyecirclehisha4917
    @ophthojooeileyecirclehisha4917 3 місяці тому

    thank you

  • @Mike-bh7sh
    @Mike-bh7sh 11 місяців тому +12

    How did we go from these type of educational "movies" to tiktok?
    I guess the same reason we went from productivity to DEI.

    • @mikemazz3377
      @mikemazz3377 Місяць тому

      We lowered standards and allowed stupid people to get a free ride through and everything in our world has suffered because of it just about everything is disposable garbage now

  • @joaoalbertodosanjosgomes1536
    @joaoalbertodosanjosgomes1536 Рік тому +6

    SHELL
    WE ❤ SHELL

  • @av8bvma513
    @av8bvma513 3 місяці тому

    06:00 ERROR! The power stroke contains hot gasses at several hundred psi. Piston-port engines have extremely fast rates of opening, far faster than poppet valves, and this causes an instantaneous pressure differential between the cylinder and the exhaust port. Naturally the high pressure quickly moves into the area of low pressure. So quickly does this happen, piston-ported engines develop strong and predictable exhaust pulses, which can be used to tune for higher efficiency. Small 2-strokes are always naturally aspirated, meaning there is no pressure over atmospheric. This is the major stumbling point of these simple engines, the difficulty of getting the extremely hot and very high pressure exhaust gasses out, and the ambient air-fuel mix in at less than 15psi. Large 2-Stroke engines in trucks, trains, and Ships use supercharging to increase the efficiency. Mechanical geared or belt-driven impellors, or exhaust driven turbo-superchargers on ship engines, which generally also run four (4) or more Poppet Exhaust Valves in the head, in order that the engine can run at optimal efficiency both forwards and backwards.

  • @aureliobrighton1871
    @aureliobrighton1871 10 місяців тому +5

    I'd love to have a 2S Saab 96, but living in Munich this would bring out the lynch mob with their 'clean' E - bikes scooters cars brains ... its a good thing the electrical power is produced by thousands of virgins moving generators made from recycled combustion engines. Happy Easter 🌻:)

  • @x-105strikefreedom
    @x-105strikefreedom Рік тому +5

    Now fuels come with E-10, (in my country it is standard, not sure about other countries) my question is will E-10 damage my old 2 stroke liquid cooled motorcycle in the long run, my autolube is also working, im just adding 2T oil as a precaution.

    • @garyhooper1820
      @garyhooper1820 Рік тому +8

      If old enough to have a carburetor you may need to enrich the fuel mix . Fuel lines and seals may need changing as e-10 may not get along with them. Find a motorcycle mechanic to help with the transition .

    • @MG-iv3lp
      @MG-iv3lp Рік тому +2

      Also I use in my old timer cars Liqui Moly gasoline stabilizer for E10 and Lead replacement additives. Check their products.

    • @x-105strikefreedom
      @x-105strikefreedom Рік тому +1

      @@garyhooper1820 will do, I just changed the rubber boot in the airbox, the old ones is a real mess. Thanks!!

    • @x-105strikefreedom
      @x-105strikefreedom Рік тому +2

      @@MG-iv3lp yup, its old enough, an old Mikuni VM carb, I will try to find that product, only problem is Liqui Moly is a bit hard to find in most local shops around here. Do you also use a 2 stroke bike?

    • @redtobertshateshandles
      @redtobertshateshandles Рік тому +2

      It's more a problem that ethanol attracts moisture from the atmosphere, causing corrosion. Use fuel stabiliser and run the carbs dry after use. Here in Australia, we get a choice. I avoid it.

  • @dennisleslie8962
    @dennisleslie8962 Рік тому +17

    The fuel/air mixture does NOT "explode" when ignited.
    If it exploded the explosion would destroy the piston and other engine parts.
    On ignition, the mixture burns extremely rapidly but smoothly to deliver smooth power. It takes place so rapidly that, to the naked eye of the average person, it appears to "explode".
    High speed camera footage shows what really happens on ignition - a flame front is propagated and spreads smoothly throughout the fuel/air mixture, creating hot, expanding gases that provide power.
    It is expansion that does that, not explosion.
    Ignorance truly is not bliss.

    • @garyhooper1820
      @garyhooper1820 Рік тому +4

      Exactly correct . Explosions are termed "detonations" which result in damaged engine components .

    • @IAmNoeyes
      @IAmNoeyes Рік тому +1

      In my mind I saw the flames spread so gracefully across the cylinder head.

    • @jeremyfine1464
      @jeremyfine1464 Рік тому +10

      Narator says "mixture burns explosively" NOT explodes. Most will comprehend from that - rapid burning not explosion.

    • @erikziak1249
      @erikziak1249 4 місяці тому

      @@garyhooper1820 The word explosion does not define if the process is subsonic or supersonic, but generally "explosion" is used for subsonic, yet still rapid disassembly of things. The proper burning of air/fuel mixture in an engine cylinder is called "deflagrate", when the flame propagates slower than the speed of sound in the specific medium (in this case the air/fuel mixture). Deflagration is sub-sonic combustion. Detonation is supersonic combustion, causing engine knock and if left unchecked would destroy the engine.

  • @chrismccartney8668
    @chrismccartney8668 19 днів тому

    Still have a couple of two stroke outboards don't corrode like four strikes but make a little bit smoke on startup soon clears with modern tw3 oils..

  • @mkoldiefan
    @mkoldiefan 10 місяців тому +3

    min 1:35 The BMW Isetta wasn't a two-stroke engine 😉

  • @ypaulbrown
    @ypaulbrown 9 місяців тому

    wonderful

  • @geoffreypiltz271
    @geoffreypiltz271 9 днів тому

    Somewhat ironically the big marine engine at the end was made by Sulzer, a Swiss company, and Switzerland is, of course, landlocked.

  • @johnhabeck6153
    @johnhabeck6153 10 місяців тому +3

    The dude with the shades @ 24:51 looks cool...😉

    • @aureliobrighton1871
      @aureliobrighton1871 10 місяців тому

      ... surprising everyone with a smile eventually :)

    • @aveedub7403
      @aveedub7403 9 місяців тому

      Looks like a Mafia dude, or Man in black time travelling!!!😂😂😂😂

  • @W1RMD
    @W1RMD 11 місяців тому +1

    The Brits invented the two- stroke! Love it or hate it. It's appropriate that they do a film on the subject. I've got a Johnson outboard from this vintage that still runs, so they can't be too bad. A lot of two strokes run needle bearings which come apart easily once their surfaces pit and flake and grenade the engine. Many factors can make them unreliable. The simple fact that they are two stroke doesn't make them unreliable or less reliable. Less efficient, yes. In some cases big time.

    • @W1RMD
      @W1RMD 8 місяців тому

      @Turnipstalk Pretty cool as I have some Scottish heritage. I believe that a Scot helped invent the tv as well. Thanks for sharing.

  • @paulazemeckis7835
    @paulazemeckis7835 Рік тому +8

    Not sure why girls aren't educated about this stuff in high school. I always wanted to take my 1974 Chevy Nova apart and put it back together. Never did. Now I have a car that when I open the hood I don't recognize it as an engine.

    • @fidelcatsro6948
      @fidelcatsro6948 11 місяців тому

      Todays engines especially Toyota never need fixing or taking apart anymore, even runs long without engine oil!

    • @zOiNhUh
      @zOiNhUh 3 місяці тому

      Many girls used to see it as a nerdy thing. Now there are some grown-up women who figure out the nerds were right...

    • @Daniel-OConnell
      @Daniel-OConnell 22 дні тому

      It has become a lot more common to see female motor mechanics.

  • @wheelie63
    @wheelie63 10 місяців тому

    we've come a long way...........baby.

  • @apacherider7110
    @apacherider7110 10 місяців тому +2

    I visited the Perkins engine factory last week, very interesting.

  • @brianb-p6586
    @brianb-p6586 Рік тому +2

    That's a strange way to describe an opposed-piston engine. It's easier to think of two complete engines, each with their head removed, attached to each other... then you use one side just for intake and the other just for exhaust, and of course connect the crankshafts together.

  • @jobenbarrientos4560
    @jobenbarrientos4560 9 місяців тому

    Your 2 stroke of the future

  • @BigEightiesNewWave
    @BigEightiesNewWave Рік тому

    Can be piston-port, rotary valve, or reed valve induction.

  • @Tom-sg4iv
    @Tom-sg4iv 10 місяців тому +1

    Well the worlds largest engines are still 2 stroke powering almost all large merchant ships.

  • @turboslag
    @turboslag 8 місяців тому

    There was one error in this wonderful film, two stroke motorcycles do not come on the mega, that was the preserve of te very highly tuned British single cylinder 4 stroke race bikes, like the Manx Norton. The most successful application of the 2 stroke engine is garden equipment! Strimmers, chainsaws, lawnmowers etc. There must be many millions of them around the world. Used carefully and with good maintenance, good quality oil and fuel, they will last for years. I have one Stihl strimmer that is over 30 years old, still working fine and never needed any parts replacing. Also a Flymo mower with a Tecumseh engine, coming upto 20 years old, same story! I also have several 2 stroke motorcycles, including a BSA Bantam and an MZ, which although small in capacity, have surprisng torque. Two strokes are wonderful technology.

  • @jacketrussell
    @jacketrussell 7 місяців тому

    1:40 The Isetta bubble car was powered by a 300cc FOUR stroke.

    • @danielsellers8707
      @danielsellers8707 24 дні тому

      This is a Zundapp Janus (Professor Z in Cars); 250cc 2 stroke. The original Iso Isetta had a 2 stroke.

  • @BigEightiesNewWave
    @BigEightiesNewWave Рік тому +10

    Joe has declared war on all these. Now we have to deal with thermal runaway, and toxic off-gassing, and batteries that cannot be recycled very well. No Li at all, with present tech. can be recovered. It will be looked down on in the future as a bad idea.

    • @fidelcatsro6948
      @fidelcatsro6948 11 місяців тому

      You mean Jenocide Joe

    • @aureliobrighton1871
      @aureliobrighton1871 10 місяців тому

      ... looking at the 'E-Movement', your conclusion is of a very friendly wording ... 🌷:)

    • @aureliobrighton1871
      @aureliobrighton1871 8 місяців тому

      @Turnipstalk ... hopefully this won't add another debris mountain range to the African landscape. After all 800.000 tons of lead p.a. from conventional car batteries plus a few sets of tires should be sufficient. There is no freshair avenue around Skylla and Charibdis. It is just fair to make everyone aware of that. There only simply is a new line of business. Some people might also still remember 'Love Canal'. I used to work in Londons reinsurance market when 'Superfund' was introduced. Don't tell me markets and shareholders have gotten any wiser since. Thankyou.

  • @willyjensen8595
    @willyjensen8595 Рік тому +3

    Funny to see that the VASPA gang was at it already in 1959😅😅😅

  • @receptayyip1410
    @receptayyip1410 2 місяці тому

    Why don't we have little two stroke diesel engines in our cars and motorbikes?

  • @franktarawa1300
    @franktarawa1300 Рік тому +3

    No need for O2 sensors 😁

  • @redtobertshateshandles
    @redtobertshateshandles Рік тому +1

    Made before turbochargers were common.

  • @nicks4934
    @nicks4934 10 місяців тому

    Ah blue smoke. Happy days 😂

  • @gngl7142
    @gngl7142 3 місяці тому

    Then why did 2-stroke engines disappear. It can be used easily by adding valves and superchargers without the need to mix oil. In this way, you get smaller and more powerful engines.

  • @bruceprentice4598
    @bruceprentice4598 7 місяців тому

    2-stroke diesels are the best possible way to convert hydrocarbons into sounds and smells😜

  • @Daniel-OConnell
    @Daniel-OConnell 22 дні тому

    I see no reason why 2 stroke engines don't have a future . Turbocharging and direct cylinder fuel injection is now pretty standard in both petrol and diesel engines. This has eliminated the main drawbacks of 2 stroke and forced lubrication systems can be used in all cases. I smile at the frowns about incomplete scavenging, it was EGR before EGR was invented and without the clogged valves and intake manifolds. The power to weight of 2 stroke is almost double that of 4.

  • @jamesrindley6215
    @jamesrindley6215 11 місяців тому +1

    Who'd have thought that these polluting stink-factories were so positive for society? Bringing people together... It's good we're rid of the awful things in most countries.

  • @carltonkeys6205
    @carltonkeys6205 Рік тому +3

    Enough of the sound effects 😮

    • @davop4919
      @davop4919 Рік тому +1

      😂I know right 😂

    • @mohdfahmi8841
      @mohdfahmi8841 Рік тому

      //;;*;*;*;*;//;;//...

    • @cedriclynch
      @cedriclynch Рік тому +3

      Wouldn't it have been good to hear the Commer and Foden lorries, the Auto Union car and the Deltic locomotive instead of "music".
      The date of this film is about 1960.

    • @philhealey4443
      @philhealey4443 Рік тому +2

      ​​​​​@@cedriclynchYes for less music, athough some of Ron Goodwin's pocket money perhaps diverted here in some places to the BBC Radiophonic Workshop boffins? Clearly you're another connoisseur of lorry two stroke aural delight, which I fully support. Censorship of scooter, Auto Union, Bond and bubble car noises is maybe justified, as I'm still traumatised from the cacophony of our neighbour's erratic and discordant Moskvitch in the early 1970s. The terrifying approaching sounds from a laden Deltic, when climbing Hemerdon Bank in the dark - best experienced with an attendant medical team to deal with the effects of infrasound - should however be on everyone's bucket list.

    • @Jim_maco
      @Jim_maco Рік тому

      Lol

  • @fidelcatsro6948
    @fidelcatsro6948 11 місяців тому +19

    Sadly i scrapped my 39yr old yamaha 2stroke in 2022 because the authorities gave me 3000dollars to get rid of it for a cleaner 4 stroke modern engined bike that meets todays emmission requirements🫠

    • @Modaaani
      @Modaaani 9 місяців тому +7

      And I didn't. My RX 135 5 Speed along with Suzuki Shogun are the twinkle of my eyes. When they are on the road, they roar. 😊😊😊

    • @fidelcatsro6948
      @fidelcatsro6948 9 місяців тому +1

      @@Modaaani good bikes they are, i rode an rx100 wayyyy back in 1990, she was fast for a little 100cc

    • @Modaaani
      @Modaaani 9 місяців тому

      @@fidelcatsro6948 I have had RX 100, RXZ, RXG & RX 135 Tiger model bikes 4 speed at different times. Sold each of them at a decent profit.
      .
      Now only RX135 5 SPEED and SUZUKI SHOGUN. These are so much in demand in Indian market that people are ready to shell any amount.
      .
      One will stop driving a 4 stroke if he gets to drive a stock RX 135 5 speed and Suzuki SHOGUN/SHAOLIN.
      ☺️☺️☺️

    • @ArtherAndrumedArtur
      @ArtherAndrumedArtur 3 місяці тому +2

      Which country is this with high environment standards

    • @fidelcatsro6948
      @fidelcatsro6948 3 місяці тому +2

      @@ArtherAndrumedArtur I live in one of the most expensive places on the planet to own a motor vehicle

  • @richardsimms251
    @richardsimms251 7 днів тому

    Look how thin and healthy these people are. They do not eat garbage food. I wish that I was thinner.
    RS. Canada