difference between 2and 4 stroke engines?
11-21-2004 | 09:55 PM
#26
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From: SGP, SINGAPORE
RE: difference between 2and 4 stroke engines?
Hi,
I would vote for 4 stroke on trainers, reason being trainee tense require short take-off from all or any direction and they abort landing 10 times before rolling the plane to the nearby bush...
All this difficult stunts requires high torque on low rmp to help them get out of trouble, the menovure some trainees make are sometimes 3-D look alike.
Futhermore, 4 stroke drives a bigger dia props, which creates a bigger gyroscope effect on the plane making it more stable for beginners.
Last but not least, the low end high torque can help trim more grass off to clear for a wider run way before the engine come to a dead stick when they go for a bush landing.
I would vote for 4 stroke on trainers, reason being trainee tense require short take-off from all or any direction and they abort landing 10 times before rolling the plane to the nearby bush...
All this difficult stunts requires high torque on low rmp to help them get out of trouble, the menovure some trainees make are sometimes 3-D look alike.
Futhermore, 4 stroke drives a bigger dia props, which creates a bigger gyroscope effect on the plane making it more stable for beginners.
Last but not least, the low end high torque can help trim more grass off to clear for a wider run way before the engine come to a dead stick when they go for a bush landing.
ORIGINAL: Richard L.
Here is a rule of thumb:
* Trainers, fun-flies, sport planes: 2-stroke
* Scale planes: 4-stroke
* Large planes: gas
I would go with gas for any plane with 80" wingspan or larger.
Here is a rule of thumb:
* Trainers, fun-flies, sport planes: 2-stroke
* Scale planes: 4-stroke
* Large planes: gas
I would go with gas for any plane with 80" wingspan or larger.
11-22-2004 | 06:53 AM
#27
RE: difference between 2and 4 stroke engines?
Cant beat the sound of a 4 stroke!
my saito 150 4 stroke : http://bornholm.adsl.dk/modelfly/fil...ound/Saito.wmv
my MVVS 2 stroke : http://bornholm.adsl.dk/modelfly/fil...sound/MVVS.wmv
my saito 150 4 stroke : http://bornholm.adsl.dk/modelfly/fil...ound/Saito.wmv
my MVVS 2 stroke : http://bornholm.adsl.dk/modelfly/fil...sound/MVVS.wmv
11-22-2004 | 10:42 AM
#28
My Feedback: (24)
RE: difference between 2and 4 stroke engines?
Yep, can't beat the sound of a 4-stroke:
* [link=http://whitetyphoon.com/rc/ys63s/idle.wmv]YS 63S[/link] - idle
* [link=http://whitetyphoon.com/rc/dymond_f8f/low_pass_2.wmv]YS 63S[/link] - full throttle
* [link=http://whitetyphoon.com/rc/gsp_spit_show_pass.mpg]YS 91FZ[/link] - half throttle
* [link=http://whitetyphoon.com/rc/h9_corsair/movies/SlowIdle.mpg]YS 110FZ[/link] - idle
* [link=http://whitetyphoon.com/rc/h9_corsair/movies/HighSpeedPass02.mpg]YS 110FZ[/link] - full throttle
* [link=http://whitetyphoon.com/rc/ys63s/idle.wmv]YS 63S[/link] - idle
* [link=http://whitetyphoon.com/rc/dymond_f8f/low_pass_2.wmv]YS 63S[/link] - full throttle
* [link=http://whitetyphoon.com/rc/gsp_spit_show_pass.mpg]YS 91FZ[/link] - half throttle
* [link=http://whitetyphoon.com/rc/h9_corsair/movies/SlowIdle.mpg]YS 110FZ[/link] - idle
* [link=http://whitetyphoon.com/rc/h9_corsair/movies/HighSpeedPass02.mpg]YS 110FZ[/link] - full throttle
11-27-2004 | 08:24 PM
#29
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From: Caledonia, IL
RE: difference between 2and 4 stroke engines?
I agree with Richard. Scales CRY for the 4-cycle. If you want authenticity, you want sound included. I'm a machine-nut as it is, and those 4-cycle engines are cool machines! However, if you want SIMPLICITY, low price, and raw power to train or do aerobatics and get out of jams, use a two-stroke. They're soooo dependable and trouble-free! My 2 cents.
