Knowing piston speed based on rod ratio and rpm?
Moderator: Team
3 posts
• Page 1 of 1
Knowing piston speed based on rod ratio and rpm?
by Donnie1126 » Wed Mar 16, 2005 9:24 pm
Using any rod ratio what is the best way to figure piston speed from 0 to 90 degrees at any rpm?
- Donnie1126
- Member
- Posts: 80
- Joined: Mon Feb 21, 2005 10:59 pm
Piston Velocity
by Greenlight » Tue Mar 22, 2005 1:09 am
The mean piston velocity is:
Vmean = 2 x L x N
where
L = stroke
N = rotational speed of the crankshaft
The instantaneous piston velocity is:
Vi = Vmean x p/2 x sin q x [ 1 + ( cos q / ( R^2 - sin^2 q )^1/2 ) ]
where
p = PI or 3.14159
q = the crank angle relative to TDC
R = the ratio of the rod length to the crank radius
Vmean = 2 x L x N
where
L = stroke
N = rotational speed of the crankshaft
The instantaneous piston velocity is:
Vi = Vmean x p/2 x sin q x [ 1 + ( cos q / ( R^2 - sin^2 q )^1/2 ) ]
where
p = PI or 3.14159
q = the crank angle relative to TDC
R = the ratio of the rod length to the crank radius
Project Greenlight
- Greenlight
- Member
- Posts: 127
- Joined: Wed Feb 16, 2005 10:37 pm
3 posts
• Page 1 of 1
Who is online
Users browsing this forum: automotive breath, Brian W, Cubic_Cleveland, jimhp, jjump59, lorax, ricks57 and 28 guests