Difference Between a 2-stroke and a 4-stroke Engine

2 stroke and 4 stroke engines

2-stroke engines have more horsepower, but poorer fuel efficiency than 4-strokes. Why? Because 2-strokes repeat the process of combustion more than 4-strokes.

A 2-stoke engine lacks the kinds of valves a 4-stroke has, so air intake and exhaust of fumes are handled entirely by the motion of the piston (ie the 2-stroke is simpler, and was usually used in the early days of motorcycles).

A 4-stroke engine has valves
A 4-stroke engine has valves

Soichiro Honda thought to improve fuel efficiency of his motorbikes by fitting them with 4-strokes.

A 4-stroke has special valves. There’s a valve for letting in fuel and air (into the cylinder), and another valve releases fumes (exhaust gases) after the mix of fuel and air has been ignited by the spark plug (and under compression provided by the piston). They open at different times.

A 2-stroke just has openings to let in fuel/air and let out fumes. The openings are covered by the piston at different times, so they are open at different times to let stuff in or out.

An RV Paint Job You Won't Soon Forget

“If ever there’s a strong reminder to be sure you’re fully rested when driving the rig, here it is: Imagine nodding off behind the wheel, and suddenly waking up to find this RV in the lane immediately in front of you,” writes RV Travel about this outstanding paintjob. The whole rig is painted except for the licence plate and center window.

This looks alot like Skateboard artist Jimbo Phillips’ work, right? Apparently, according to at least one commenter, it is a “stolen” design. Do you count using designs you like and reusing them as stealing?

Amazing Classic Bus Conversion - The Time Machine

This little number made it to the Quartzsite RV show a while ago and caught the attention of a few people.

So, the origins of this red and white smooth-lined balloon?

It was manufacturers in 1946 in Loudnville, Ohio as a public transportation bus. The model is called a “Flxible” [sic]. During its transportation working days, it brought Americans and others all around the country long distance. One of the notable features of the design was a possible lack of headroom.

When people convert Flxibles, they often lower the floor. That’s so they can get around inside a lot more comfortably.

The decor is that of a late-40’s — early 50’s diner, and it has a jukebox beside an authentic dining room table, black and white tiled floor, and art-deco ornamentation.