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Apr 14, 2006, 09:03 PM
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Question

Difference between 2 stroke and 4 stroke engine


I am new to the hobby, I was just curious, what is the difference between a 2 stroke and a 4 stroke engine, is one better than the other?
Thanks.
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Apr 14, 2006, 09:28 PM
Lawn darts, anyone?
Never heard of 2 stroke or 4 stroke electric motors, so can't answer question.
If your question relates to internal combustion engines, you'll get better info
by posting on the "Aircraft - Fuel - Airplanes" forums. That's where the glow
fuel/gas guys hang out.
Apr 14, 2006, 09:47 PM
Registered User
Well if you didn't repost this into a different section. Check this 2 links each one is a different type of motor. 2 stroke produces higher rpm. 4 strokes turn out more torque less rpm.
Also your car is a 4 stroke equiped vehicle. http://science.howstuffworks.com/two-stroke2.htm
http://science.howstuffworks.com/engine1.htm 4-stroke


also in an rc the 2 stroke engine does not have the read valve fuel/air flow is controlled through a hollow driveshaft with intake port and open end into the chamber. hope this helps!!!
Apr 14, 2006, 10:34 PM
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ryanl2006's Avatar
As I understand it, on a 4 stroke you have fuel come in, then it explodes, then the exhaust leaves, then new gas comes in. The new gas coming in and exhaust leaving is in 2 different steps.

In a 2 stroke, the fuel comes in at the same time as the exhaust leaving. This produces generally more power to weight and more rpm because you are doing 2 steps at once. It is also less efficient because some of the new unburnt gas goes out with the exhaust. They also have much worse emmissions because again, a lot of unburnt gas is leaving with the exhaust.
Apr 15, 2006, 01:22 AM
Registered User
Quote:
Originally Posted by ryanl2006
As I understand it, on a 4 stroke you have fuel come in, then it explodes, then the exhaust leaves, then new gas comes in. The new gas coming in and exhaust leaving is in 2 different steps.

In a 2 stroke, the fuel comes in at the same time as the exhaust leaving. This produces generally more power to weight and more rpm because you are doing 2 steps at once. It is also less efficient because some of the new unburnt gas goes out with the exhaust. They also have much worse emmissions because again, a lot of unburnt gas is leaving with the exhaust.
Thats the jist of it.
Apr 15, 2006, 03:25 AM
<- Balsa flies better ->
wolw's Avatar
Quote:
Originally Posted by lordbyronxxiv
I am new to the hobby, I was just curious, what is the difference between a 2 stroke and a 4 stroke engine, is one better than the other?
Thanks.

The 4-stroke has more torque, almost like an electric

Seriously, being away from the hobby 20 years, going combustion feels like taking a step backwards.
Apr 15, 2006, 06:38 AM
Registered User
Quote:
Originally Posted by charge1(ds)

also in an rc the 2 stroke engine does not have the read valve fuel/air flow is controlled through a hollow driveshaft with intake port and open end into the chamber. hope this helps!!!
4 strokes generally use valves in the cylinder head, actuated by a camshaft. RCV engines are 4-stroke with a rotating sleeve with a port in it.

2-stroke engines can be piston port (old time ignition engines), reed valve (most Cox engines), rotary valve (rear carburetor, high performance mostly) or use a passage in the crankshaft (most, the ones with front carburetors) that's timed to line up with the carburetor when the piston is going up.

Piston port and reed valve will run about the same either way(with glow plugs anyway).

Good Luck!
Apr 15, 2006, 09:25 AM
Registered User
I believe 4 stroke engines have more windings than two stroke motors. Also they can handle more speed without throwing a magnet. Not sure about max current differences.
Apr 15, 2006, 11:26 AM
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grouchy1's Avatar
Is this the right forum to get an egg salad recipe?
Apr 15, 2006, 01:04 PM
Southern Pride
everydayflyer's Avatar
A four stroke has the windings on the inside and a two stroke has the windings on the outside.


Charles
Apr 15, 2006, 01:46 PM
Registered User
For some of you unless your joking strokes is gas motors only.
Apr 15, 2006, 03:46 PM
Registered User
Quote:
Originally Posted by grouchy1
Is this the right forum to get an egg salad recipe?
four stroke or two stroke egg salad?

Toshi
Apr 17, 2006, 10:30 AM
Registered User
Sonsight's Avatar
Can I supersize that egg salad?
Jake
Apr 19, 2006, 11:40 AM
Registered User
Quote:
Originally Posted by Sonsight
Can I supersize that egg salad?
Jake
Nope, you'd need a turbocharger or a supercharger for that!


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