What is break over angle?

UPDATE: I say COS where it should be tan(x)=opposite length /adjacent length
Triangle calculator: www.cleavebooks...
2 Minute Tuesday: Simply put your break over angle is the angle that doesn't let you get high centered over an obstacle. If you can clear the top of the mountain or drive over the Rocks, you have a good break over angle. If you get hung up, bottom out, then you probably need to improve your break over angle. To find out how to figure out what your break over angle is you need to know your wheelbase and your ground clearance. From there you will have to do a little math by dividing your wheelbase in half.
Cos(angle) = ground clearance/half wheelbase.
If you raise your vehicle or shrink the wheelbase your break over angle will improve.
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[@grantglow4206]

Have covered a 2 minute video on best breaks for wheeling? I'd like to hear your perspective. Thanks - glow_wonders

[@SnailTrail4x4]

Breaks as in calipers and pads not break as in carnage on the trail, correct?

[@grantglow4206]

SnailTrail4x4 yes breaks for stopping, not trail carnage

[@teresaanddaylanphillips8128]

Cos(x)=adjacent length /hypotenuse length, what you need to use is tan(x)=opposite length /adjacent length to find the angle in your diagram.

[@robertneville777]

Glad someone else caught that

[@SnailTrail4x4]

Dang it, your correct. its funny it took so long for someone to notice. I wish I could go back and edit a section of video but I cant. Thanks for pointing it out and Ill make a note of it in my video description.

[@vanmanii8349]

I've been doing some testing, measuring and thinking about approach, departure, and breakover angles and here is what I've discovered: 1. A truck can't begin to climb, without scraping the front low spot, any slope steeper than it's approach angle. Doesn't matter if the slope is short or if it's long. 2. A truck can't exit, without scraping the rear low spot, any slope steeper than it's departure angle. Doesn't matter if the slope is short or if it's long. 3. When approach angle exceeds departure angle, a truck can't climb a slope, without scraping it's rear low spot, that is both longer than it's wheel base and steeper than its departure angle. 4. When approach angle exceeds departure angle, a truck can climb a slope greater than the departure angle, without scraping anywhere, provided that the slope angle is less than the trucks approach angle and less than it's break over angle and the length of the slope is less than the wheelbase of the truck. 5. A truck can't fully exit nor descend a slope, without scraping the undercarriage, that is steeper than it's breakover angle. 6. Approach and departure angles change when driving down a gully and up the other side. Again assume approach angle exceeds departure. When the truck starts up the opposite side of the gully prior to the rear of the truck leaving the descent slope the departure angle will be reduced when the front tires reach a height greater than the rear tires. In other words, the decent hill must be less than the departure angle. Also the approach angle is reduced when the rear wheels are higher on the slope then the front wheels. As such the slope of the exit side of the gully must be less than the approach angle to avoid hitting the front of the truck.

[@SnailTrail4x4]

All sound true, this is why we work to improve our angles so we can go more places without hurting our trucks.

[@robertneville777]

Angle = arctan(GC/(0.5*WB)), where GC is Ground Clearance and WB is Wheel Base.

[@vanmanii8349]

Unfortunately, you explained break over angle incorrectly. Wikipedia explains it correctly see en.wikipedia.org/wiki/Breakover_angle. You state that the inverse cosine of the ratio of ground clearance to 1/2 of the wheelbase distance is the breakover angle, and that is not correct. Also the angle you are measuring in your diagram is not the break-over angle, in fact that angle is exactly one half of the breakover angle. Look carefully at the diagram of breakover angle on the wikipedia page to see what angle is the breakover angle. Here is how the simple math is done to calculate it correctly: on a scientific calculator all you have to so is take the ground clearance number and divide it by half of the wheelbase and press the "=" button. Then press 2nd and then tan (that is Tan not Cos as you state) and then multiple that result by 2. So your buddies vehicle has 21 inches of ground clearance, so divide that by half of the 109 inch wheel base and you get 21/54 = 0.3888. Now get the inverse tangent of 0.3888 to get an angle, and multiple that angle by 2. So 0.38888 "2nd" "tan" = 21.2, and 21.2 * 2 equals a breakover angle of 42.5 degrees. I know how to calculate the angle, but I'm not 100% sure what it means. Here is my guess at what it means: if his truck crests a hill where his rear tire is still on the uphill and his front tire is on the downhill the downhill angle must be less than 42.5 degrees or else he will get high centered.

[@BlakesGarage]

Some straight up engendering explained stuff right here 👍

[@SnailTrail4x4]

Some simple math when you add Google, haha

[@thecoolchipys]

Wut

[@AZWESTSIDEWHEELERS]

Great video buddy. How about a 2 minute Tuesday on Minimum requirements to run the entire Rubicon Trail skipping any optional really hard obstacles if possible. Lift, lockers etc. does it require any Offroad pass for people out of town. Or pretty much any info on the Rubicon Trail. I’m a sponge needing water here. 😂

[@SnailTrail4x4]

That's a good one, thanks ill make sure to cover that.

[@mjoet731]

opposite over adjacent is the tangent, not the cosine. tan-1(a) = 21/54 = 21.25 degrees. Anyone remember SOHCAHTOA?!

[@user-cl3gz9ey1w]

1:09

[@dannyb6129]

Love the videos!!SUBSCRIBED!!

[@SnailTrail4x4]

Thanks for the comment and your support. What do you drive?

[@MsContourz]

sooooo ..when approaching an obstacle, how do you measure the obstacle now that you know your angles? I am particularly interested in measuring a rock step drop on a decline to make sure you won't hit. Thanks

[@SnailTrail4x4]

Well first you would need to measure the height of the rock so you make sure you won't hit right as the tire comes off, then measure the length. Then if your front tires are still on the rock while your back ones start to hit, you will most likely be alright

[@JPE_DRAEB]

Here is a calculator as I think his math is flawed. www.vcalc.com/wiki/KurtHeckman/Breakover+angle

[@johndiaz7240]

Good stuff ,thanks

[@SnailTrail4x4]

Thanks! Also, thanks for the comments.

[@user-cl3gz9ey1w]

Golden angle

[@JpLorimer]

21 inches of ground clearance??

[@SnailTrail4x4]

Nice, what size tires do you have?

[@spec24]

We will literally pave over hundreds of thousands of miles of land, but don't you dare going wheeling when a dirt trail is wet... that might harm something. People are out of their minds.

[@AwesomeRiya]

its tan not cosine

[@EverMoreDesign]

I am sorry, but you have so many errors in this video you need to take it down. First, your drawing does not show the actual breakover angle. As others have pointed out, if you look at Wikipedia, you will see the correct drawing and the correct angle. Second, all you math is wrong, and you are basing it off the wrong angle anyway. You have had this misinformation up for 6 years, completely misleading people who come here looking for help, and from your responses below, you have known this for at least 5 years. Please remove it and if you want, redo it correctly.