any good easy to use calulators to help with vehicle angles on ramps ?

[sweetk30]

looking for a good / easy to use calculator for helping me determine approach angles and break over angles and tail angles on vehicles .

i am building a set of beefy ramps for some special sized equipment thats lower to the ground and has some bad front end stick out . one is 6ft 8" front tip to front axle center and 10" off the ground .

i know the lengths / wheel base and ground clearance . i also know what length ramps i can use to build with and also my end goal of height is 16" off the ground .

i am sure someone has a stupid easy program to help in this

 

[centexk5]

You have a boat on wheels?

 

[Hosalabad]

Disclaimer: I am an IT guy, I am not a maths person, but here's what made sense to me.

I think you would need an approach angle calculation then a breakover angle calculation, right?

Approach angle: https://www.vcalc.com/equation/?uuid=15cce21e-92c9-11e4-a9fb-bc764e2038f2



Breakover angle: https://www.vcalc.com/wiki/KurtHeckman/Breakover+angle



Then you build the ramp to accommodate for the least capable height.


So from the calculator, you have a 7.2 degree approach angle.

Then triangle calculator: https://www.calculator.net/triangle-calculator.html

A = 90 to set b at 16" from ground.
B = 7.2 degrees from the approach angle.
C = is calculated 90 - 7.2
c and a are calculated from above.

This is the result with a 16" height on the vertical, and a 7.2 degree on the approach angle, gives you a 128" long ramp for the first axle. If the rear approach or breakover angle are worse and need a longer ramp, you go with the longest value.

https://www.calculator.net/triangle...6&vy=&va=90&vz=&vb=7.2&angleunits=d&x=51&y=12





Need the wheelbase and departure hangover to figure the rest. Is the 10 clearance the same everywhere? Let the record show I did my work on paper, with a Blue sharpie.

 

[sweetk30]

@Hosalabad here is some info on a few of the longest units .

c-c axle is 110" / 120" / 132" for the longest and 10" point seems to the same on the front and some drop to 8" low point on the rear .

i have a few shorty units at 60" range c-c axle and 12" - 13" .

i did some looking and i can swap the ramps for the top runners and gain from 11ft 8" to 14ft length and still be fine with work space on top .

here is a idea pic of were i am going but for much more weight capacity and using what i got in the 10" c-channel already .

 

[Hosalabad]

On the 132" wheel base, if I use an 8" clearance height, the breakover angle is 13.8. The approach angle is less forgiving, so at the 7.2 degrees of ramp, so i the front makes it up the ramp, the center will clear the break over.

If the rear overhang is shorter than the 6'8" front overhang, you should be ok with the 128" ramp.

I think it all works, but I'd have to mock it up with string or something to be sure.

 

[sweetk30]

ahh ...... burn it in with the welder and call it good .

yes rear overhang is much less than the front is . the front has bolt on steps and or welded on steps so thats a no go on easy mod .

thanks for the help buddy !

 

[Hosalabad]

Glad to help, what are these? I was thinking huge mowers?

 

[sweetk30]

airline ground support equipment units .