1939-40 DKW (Auto Union) 'Front' Luxus Cabriolet, four-seater, 700 cc, two-cylinder, two-stroke transverse engine, front-wheel drive, and a whopping 20 hp! Link in comments.
Everytime a two stroke guy, sees a four stroke guy rebuild his engine.
Why aren't two-stroke diesel engines more popular? They are mechanically simpler and have more power to weight ratio than their four-stroke counterparts.
I know diesel engines in the USA aren't popular to begin with, but what about in Europe?
http://en.wikipedia.org/wiki/Two-stroke_diesel_engine
Difference between two-stroke and four-stroke engines on motorcycles?
I don't own a bike, but i plan to in the near future.
Currently I'm doing research about everything motorcycle related, but I can't find anything about the difference between two-stroke and four-stroke engines on motorcycles.
Which one would be "better" for beginners, or easier to maintain?
ELI5: What's the difference between a two and four stroke engine?
Are Taotaos 49cc engines four stroke or two stroke? Are the transmission single chain or dual chain?
Just wanting to learn more about the basic engineering behind my new scooter. I'm also curious of how the kickstart works...I saw here that the kickstart is attached to the input shaft but are there any animated diagrams of how this works exactly? Thanks
ELI5: Engines. Two stroke, four stroke, cylinders, etc.
Everyone is always asking me. When I ride or drive something with an engine. "Is that a two stroke or four stroke?" "How many cylinders?" I've never been able to answer this confidently. Can anyone simplify this for me? Thanks.
Invention: Six-stroke engine that tops off the familiar four-stroke internal-combustion process with two extra strokes of old-fashioned steam power.
popsci.com/popsci/technol…
I finished attaching the common four stroke engine kit to my bike. When I lift the back tire off the ground and pull the throttle the back tire spins pretty fast but if I sit down on it the bike barely wants to move. I believe it is my clutch. Can anyone tell me what to do about this? Replace whole?
Four-Stroke Engine Cycle Produces Hydrogen from Methane and Captures CO2 - Georgia Tech researchers have demonstrated a CO2/H2 Active Membrane Piston (CHAMP) reactor
news.gatech.edu/2017/02/1…
Millet's 1887 tricycle. Two-liter 5 cylinder 4-stroke engine in the front wheel. Steel tires and suspension. Basket is the passenger seat, buckets are fuel tank and grease. Top speed 34.2mph (rear wheels were lost)
"Aprilia did something unusual at the Sepang test: converted one of the riders' offices in the garage into a workshop, returned to their two-stroke days, and stripped, cleaned and rebuilt the new RS-GP engines during the test!"
twitter.com/denkmit/statu…
Four-Stroke Engine Cycle Produces Hydrogen from Methane and Captures CO2 - Georgia Tech researchers have demonstrated a CO2/H2 Active Membrane Piston (CHAMP) reactor
news.gatech.edu/2017/02/1…
More power with less: Apple's A13 Fusion is faster and more power efficient. (Two performance cores consume 30% less power, the four efficiency cores save 40%, the four GPU cores also save 40%, and the eight Neural Engine cores are 15% more power efficient)
appleinsider.com/articles…
Gears of the Napier Deltic engine - a British opposed-piston valveless, supercharged uniflow scavenged, two-stroke Diesel engine used in marine and locomotive applications [4966 x 3712]
Four-stroke engine cycle produces hydrogen from methane and captures CO2. "The CHAMP system could be scaled up or down to produce the hundreds of Kg's of H2 per day required for a typical automotive refueling station -or a few kilograms for an individual vehicle or residential fuel cell"
chemeurope.com/en/news/16…
A short-term spike in radiation levels was recorded after a rocket engine exploded during a test in Russia. Moscow’s defence ministry said two were killed and four others wounded after the blast at a military shooting range in the northwestern region of Arkhangelsk.
independent.co.uk/news/wo…
Kugelpanzer - Light Reconnaissance Vehicle built by the Germans. Very little is known about the Kugelpanzer, it had a single-cylinder two-stroke engine and the Kugelpanzer was probably shipped to Japan by Germany and later captured by the Soviets in 1945.
ELI5 How a four-stroke engine lubricates when the piston is stroking upwards?
In two-stroke engines there is oil everywhere, and I get that there is lubricant when the piston goes down. But how does it lubricate on the way up whilst always staying below the piston?
1972 Kawasaki f6 I am not much of a two stroke person, but the PO removed the oil tank for painting, and lost the lines between the tank and engine. I’m also unsure of where the lines attach so some help finding the right diagram would be amazing.
Four wheelers, dirt bikes, and bolted on two strokes
I've lived in a few different states and different kinds of cities but no where else have I seen the number of recreational vehicles there are here. Just today I was walking on the river path by Seneca Zoo and got passed by someone on an ATV who then crossed the pedestrian bridge. Minutes later, I saw 3 people on modified mountain bikes driving down the road. Not to mention the dirt bikes and other four wheelers I see tearing down Hudson Ave on my commutes.
Is this just a uniquely Rochester thing?
Four-Stroke (Cycles) Engine
Model 464-245. An extra-long range B-52 concept design with two gigantic external liquid hydrogen fuel tanks and four engines. (Ca. 1957)
What are these two tubes for on a two stroke engine, do they need to have an open end? One of em had a screw in them I unscrewed it and black "oil" flushed out of it. Thx for help
I found this on facebook marketplace for 550 but can't seem to find much info about the brand or anything online. Anyone know much about this? It is a two stroke engine and doesn't appear to be in bad shape. Any idea?
Why are diesel two-stroke engines not used in trucks and cars?
My understanding is that a two-stroke diesel provides much higher power per displacement than a four-stroke engine, without the many problems of a two-stroke gasoline engine, at the cost of requiring forced induction. Sounds very useful. I'm curious as to why these engines only seem to be used in very large-scale applications like ships and locomotives. Is it just not practical to scale them down to the size of a car? And in that case, why is that so and why do four-stroke diesels not have the same problems?
Four-stroke engine cycle produces hydrogen from methane and captures CO2. "The CHAMP system could be scaled up or down to produce the hundreds of Kg's of H2 per day required for a typical automotive refueling station -or a few kilograms for an individual vehicle or residential fuel cell"
chemeurope.com/en/news/16…
Were there any best years which are superior to other motors in terms of older two stroke outboard engine production? Dirtbikes had good years and bad years, I'm assuming boats were similar?
I'm in the market looking for older used two stroke outboards, preferably an Evinrude 25, 30, 40, or 50. I'd like to have a couple of engines around, mainly because I need one in Hurricane-escape working order before digging into the carb on my main engine. I like a lot of the early Evinrude models, the Norseman looks nice (74 I think?) but it's difficult to know which years were the best, only an older mechanic would really know. So, I have to ask this subreddit the question, because I feel like it has a good chance of being exposed to such valuable knowledge.
[#823|+1496|42] The world's smallest working heat engine has just been created by a team of German physicists. It uses a single Calcium atom, and runs in four strokes like your car's combustion motor. [/r/science]
reddit.com/r/science/comm…
My dad passed away two days ago after 60 years. He had four strokes, very bad diabetes, artificial hips and a shoulder, and had a quadruple bipass to name a few health problems. He had such a servant heart, was a friend and helper to everyone, and now he is finally free from the pain and suffering
GSR reusable hypersonic air-breathing launch aircraft powered by four turbo-ramjet engines, carrying the OS orbital spaceplane and an expendable two stage rocket. The GSR would reach Mach 6 and 30 km altitude before releasing the upper stages. The project was cancelled in 1970.
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