10 Unusual Weird And Rare Engines

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40 Comments

  1. 4:35 that is the pump I use for a air compressor in my shop. I have tried to find ID #’s to figure out where it came from, This video solved the mystery. Thank you.

  2. The Atkinson at 6:00 is the same engine design used in the Gen 2 Toyota Prius for a slight loss in power, dramatically lower emissions.

    1. Main advantage is higher efficiency, compression stroke pressure reduction, results in less power, Prius electric motor makes up for power reduction.

    1. Flemming Veggerby with a nearly nonexistent stroke, it doesnt have a lot of momentum.

      Its a rotary after all..

  3. I take my hat off for the guys who have thought up these machines. They did not only turn and make noise but they were used to make trains and boats and planes go where they were going, give water and electricity, and power all possible kinds of machines that people use to kill each other.

  4. That wright R-3350 had a mechanical supercharger, fuel injection, and and power recovery turbines.
    The later versions were 34% efficient, an unheard of figure for that era.

    1. Hahaha . Mister S showing his ignorance again…. not realizing that aircraft engines are *thermally limited* and that we are most concerned about *power to weight ratios* and *reliability under continuous high loads.*

      That means that because they are made so light and need to run at 75% or more of their max rated power for hours upon hours… plus being limited by the speed of the propeller unless you want to put a heavy and unreliable gearbox on the front…. that it isn’t a simple matter of increasing brake mean effective pressure to get fuel efficiency.

      I guess I can’t fault you. None other than Porsche tried to make an aircraft engine. From a specific power and efficiency point it was a huge success. From a power to weight and reliability standpoint it was a dismal failure—coming in behind light aircraft engines that were designed in WWII, 40 years prior.

      Diesels are more efficient, but extremely heavy. Good for locomotives and ships and trucks… not so good for airplanes. A few Diesel engines have been made since Junkers tried and failed with the first one almost a century ago. They still have reliability problems… Thielert actually going out of business due to gearbox problems their gasoline competitors don’t have.

      So…. for an aircraft engine to deliver that type of efficiency and being reliable enough for scheduled airline service was a milestone at the time

      Now please. The grownups are talking. Go play with your toys.

    2. @Bartonovich52 _exist posibile growth randament at thermic motor of steam of otto of diesel with good maybe made good cycle of fire and in especialy complet fire oxidated combustibile complet at dioxid carbon and water without smoke_oxidated complet maybe growth wirh from 50% at 100% because solid particule in fire complet give gaz and folow powerfull growth for volumetric gaz co2 andh2o in engeenes motor cilindree_ __archaicxn lord

    3. I was talking to an old friend that died a few months ago. He was telling me that his grandson had an interest in flying. He took him to this little airport grass field. He has a friend that had an old Stearman It has a radial engine. He said when the pilot was starting the engine his daughter was asking him if he really thought her son should be in that thing. We both laughed and I said well I can see how her with no experience with a radial engine might has worries. I said you have to think about how a radial can cough and fart until it get all the cylinders firing. I have pictures of my grandchildren in that plane and it was used all the way back to the 1930s. Wow. My friend was putting new cloth on the tail feathers. I miss my old friend had died last year. He was working on the wings of a glider he so much wanted to fly. He didn’t live to do that. That is the thing that bothers me that he never got the chance to go up in a glider one more time. RIP Greg.

  5. In case anyone was wondering, yes their are some practical applications for these “weird” engines. The Toyota Prius uses a modified Atkinson Cycle engine.

    1. @Historic Aero Engines My Grandfather worked on these engine when they were new, and if he heard your Prop Balance, and Crankshaft Breakage statements He would be spinning in his grave… Now You also took my “Directly Connected” to mean ‘Directly Attached To” NO…NO…NO… *Directly Connected* can be Either Crankshaft Mounted or Gearbox Mounted….as in a “Direct Mechanical Connection via Gearbox” and I am sure if you read thru the manuals of the era you will find that verbiage. Thank You, but please don’t incorrectly, TRY to correct me, I know what I am talking about.

    2. @David In general, large high power piston aero engines use the propeller as one way of damping transient harmonics that can peak at certain rev ranges. Some operations advise avoiding certain rev ranges as well. Early R3350s were well known for vibrations at different rev ranges, believed to be the cause of some oil fires and short engine life. The two R3350s we have in the shop are later examples equipped with PRTs. The Merlin can also suffer with crankshaft failures if run at prolonged low speed without a load.

    3. ​@David Power Recovery Turbine. The later examples used three exhaust turbines that provide about 500 hp recovered from the exhaust stream, and provided to the engine through a viscous coupling. These are the turbo compound engines.

  6. I once left a 3/4 drive ratchet on a L10 Cummings after adjusting the clutch. Luckily it was ratcheting in the direction of rotation.

  7. I can rebuild a 350 Chevy just about with my eyes closed, but, DAMN!!!! Some of those old motors are way the hell beyond my range of mental state. I can work on just about anything, if I can get the book on the motor. Still, great machines!!!

  8. The Zvezda M503 they show is actually _not_ diesel. It’s a competition tractor named Dragon Fire and the engine has been modified to run on methanol and produce almost double the horsepower of the unmodified M503… ~8000 @ 2500rpm. That’s why it’s so loud and has the sharp “snaps and pops” instead of diesel’s typical wet rumble. And that’s also why it breathes fire…

  9. I see one Ring Ding engine wouldn’t start on one motorcycle and the 7 in a row Ring Ding was too wide to be used as far as I am concerned! Otherwise, some of these engines worked but most didn’t do much. Nice informative video though.

  10. Anyone know how the injectors and pump are lubricated in the multifuel engine? Gasoline doesn’t provide very good lubrication so since the engine is capable of running on it I’m curious how they guaranteed lubrication for the IP and the injectors.

  11. Love the Unlimited Class tractor pullers!! Those guys run anything from aircraft jet engines to hemis and all the cool stuff in between!!

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