no

 

No. The piston travels up and down twice for each CYCLE. But it does 1 revolution per up and down.

4 stroke/2 stroke is irregardless= as long as the piston is attached to the crank and turning up/down motion into rotational motion, each up/down = one Revolution.

 

aye aye, thx for clearing that up

 

Put in the rod /stroke of the F20c in this applet:

Rod: 6.02 inches
Stroke : 3.31 inches

http://www.wfu.edu/~rollins/piston/a...interactive_2/

and you'll see the piston has a max velocity of 201 mph

edited: bad rod

 

Well, you are right that "this is not correct"!

25.2 m/s = 90.72 km/hr

 

Right. The 56 mph number is an average, not a max.

 

[QUOTE=Mr. S2k,Dec 13 2005, 07:40 PM]
This is not correct.

F20C:

9000 rpm = 150 rps
time for 1 rev = 1 / 150 = 0.006666 s

Piston speed = 2 x stroke / time for 1 rev

 

Hmm. Since the piston must stop on each end of stroke, is the 200+ number true? Maybe not, got to figure it out. It accellerates from 0 to max speed to zero to max speed and back to zero on every revolution of the crank.

Maybe I'm the one who wasted his college years.

 

[QUOTE=Mr. S2k,Dec 13 2005, 03:40 PM]
This is not correct.

F20C:

9000 rpm = 150 rps
time for 1 rev = 1 / 150 = 0.006666 s

Piston speed = 2 x stroke / time for 1 rev

 

Just for fun I put in a possilbe F1 rod stroke ratio (2.75 inches / 1.65 inches) with 18000 rpms in the applet I mentioned and came up with a max velocity of 209.15 mph