Hi everyone,
I have a simple question here. How do you solve for the degree of a curve (by chord definition) if you have just the radius? I understand how to solve the degree of curve by arc definition....5729.58 divided by the radius, but I am struggling with solving by chord definition. Sorry, it is probably a really simple solution, I am just not seeing it today and thought I would try posting here.
Thanks.
R = 50 / (sin(D/2))
D=delta of curve. (1°)
Slight clarification:
R = 50 / (sin(Drr/2))
Drr=degree of curve by railroad/chord definition
A circular curve has one radius but two degree values, Drr and Darc.
Email me through the profile if you want my handy-dandy curve calculator program. It's a small windows program that will compute for either definition all the rest of the parameters from the last two parameters you entered (a few combinations not allowed). Just promise to let me know if there is any problem with what it calculates.
Thanks for the help guys! I figured it out.
I was having trouble working with the formula: R = 50 / sin(Dc/2)
***Dc = degree of curve (chord definition)***
To solve for the degree of curve (by chord/railroad definition) when given the radius I used:
Dc = 2 * arcsin(50/radius)
That gave me the answer I was looking for.
Thanks again.