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Old 02-29-2012, 03:09 AM   #29
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Originally Posted by IMDSailor View Post

Just remember Pie R Square, not round like our mamas tought us. lol.

My Momma taught me that Pie R Round and Cobbler R Square.

.
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Old 02-29-2012, 03:22 AM   #30
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You won't know the bumper to ground inches unless you know the slope of the ground.
Just get a bubble level and set it on the counter if it's in the circle you're good.
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Old 02-29-2012, 07:43 AM   #31
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I'm not looking for level gents, I'm looking for how degrees is equal inches for a 40ft MH, 8.5 ft wide.

So let us assume that a 40 ft MH is 3 degrees side to side, and 3 degrees front to back. How much is that in inches?

Same equation for 1 degree, 2 degrees, 3, degrees, 4, degrees (if i'm more than that I'll move)
For each degree the rise over 1 ft is .2096 inches, or if you want to make it simple .21 inches which is a Tad less than a 1/4 inch.
So for 3 deg it's 3 x .2096 = .6288 inches over one foot. 2 deg would be 2 x .2096, etc.
If your looking for the total rise over 40 ft at 3 deg it's 40 X .6288 = 25.15 inches.
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Old 02-29-2012, 11:45 AM   #32
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Originally Posted by greggholmes View Post
You won't know the bumper to ground inches unless you know the slope of the ground.
Just get a bubble level and set it on the counter if it's in the circle you're good.
Gregg, I'm not looking for level. Level is not a problem. The jacks are auto-leveling, or if in manual mode the nice pretty lights come on to let me know when it is level. I'm looking for information that tells me how many inches of slope equates to 1 (or 3) degree(s) fro a 40 ft Mh.

Quote:
Originally Posted by IMDSailor View Post
For each degree the rise over 1 ft is .2096 inches, or if you want to make it simple .21 inches which is a Tad less than a 1/4 inch.
So for 3 deg it's 3 x .2096 = .6288 inches over one foot. 2 deg would be 2 x .2096, etc.
If your looking for the total rise over 40 ft at 3 deg it's 40 X .6288 = 25.15 inches.
Hey Sailor,
Thanks, I think. But where did you come up with the .2096? What is the formula for finding that piece of information?
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Old 02-29-2012, 11:55 AM   #33
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Old 02-29-2012, 12:20 PM   #34
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Hey Sailor,
Thanks, I think. But where did you come up with the .2096? What is the formula for finding that piece of information?
Hi Wayne, I got that from the angle tables in my handy dandy LEE VALLEY TOOLS carpenters book.
Reference Books - Lee Valley Tools
To do the actual equation you need Pythagorean Theorem, Sin/ Cos tables, the actual equation escapes me right now, but its available on the World Weird Web. Google Rise over Run or Calculate Rise using degrees.
It's much easier to look it up in a book like the one above.

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Old 02-29-2012, 12:57 PM   #35
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The Tangent of an angle is the amount of "rise" or "Drop" over a distance, 8 Feet is 96 inches, so open windows calculator

Click on VIEW and choose Scientific, Enter 3 Click TAN, result I got was a bit over 5"

Source for more info on Tangent is: Sine, Cosine, Tangent
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Old 02-29-2012, 05:34 PM   #36
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Windows calculator?

I went to the window, I even opened it, but all it did was let the bugs and dust in.

You must have fancier windows.

I'll try it on "a computer," a MAC, I'll just download one of the free calculators, like KoalaCalc.

Maybe it will help me.
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Old 02-29-2012, 07:38 PM   #37
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Geeez Wayne, if I had known your were a Mac I would have drawn you a picture instead. Just say'in.

But seriously tho, some of this math stuff can be fun. Never thought I'd live to see the day when I'd say that. lol. Using a calculator is the easiest way to go, but doesn't help if you want to see the actual equation and actually learn the process, thats the part I like. So thanks for asking the question, it forced me to dust off some brain cells.

Hope I was of some help to you.

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Old 02-29-2012, 10:37 PM   #38
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wahhhh hooo (crying) I want the formula.
And a simple example to go by.

Ya'll be careful now. I'm running dual processors with great speed. It computes faster than I can think. Oh! wait a minute. My Vic-20 did also.
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Old 03-01-2012, 10:56 AM   #39
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Hi Wayne, the rise of 1deg over one foot is a constant, .2096. To calculate the rise over run with a known angle, lets say 3 deg. is 3 x .2096 = .6288 x distance(Run) lets use 8ft. Therefore .6288 x 8 = 5.0304 inches rise.

To use the Tanget function of a calculator, which has all those nasty Sin/Cosin/Tangent tables stored in it, again for 3 deg. enter 3 > press the Tangent(Tan) button, it will show .0524 > multiply that by your distance(run) in inches in our case 96 which will equal 5.0311 inches rise. it looks like this 3(Tan) x 96 = 5.0311.

Heres something that will bring a chill to many a heart.
Click image for larger version

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Old 03-01-2012, 11:06 AM   #40
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My Sears protractor and a yardstick from Ace Hardware will do the job also.

Not quite as accurate but close enough. Cept maybe for celestial navigation.
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Old 03-01-2012, 11:59 AM   #41
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Wayne,
Let's try this.

For 3 deg. Incline: 3 deg. = X(0.0523)
For 6 deg. Incline: 6 deg. = X(0.105)

Where:
X = the linear distance to be measured in inches.

For example:
If the refrigerator is oriented facing the side of the motorhome the 6 deg equation will be used to determine the side to side deviation of the motorhome from level in inches. The 3 deg. equation will be use to determine the front to back deviation of the motorhome in inches. Therefore:

6 deg. = 108(0.105) = 11.34 inches. (The number 108 is the width of the motorhome in inches.)
3 deg. = 480(0.0523) = 25.1 inches. (The number 480 is the length of the motorhome in inches.)

Naturally, if the orientation of the refrigerator is facing front to rear in the motorhome, then just use the 6 deg. Equation for front to back deviation of the motorhome and the 3 deg. Equation for the side to side deviation.

The equation can be used to measure any length and width of an RV, just plug in the appropriate numbers.

Another way this can be used is when parked on an unlevel surface, placing a 3 foot carpenter level on the floor so it measures the front to back level of the motorhome. Using the 3 deg. equation will tell you how much to lift the level for a 3 deg. incline. If the bubble doesn't reach between the lines, it's more than 3 deg.

Example:

3 deg. = X(0.0523)
3 deg. = 36(0.0523) (The number 36 is the length of the level in inches.
3 deg. = 1.88 inches or 1-14/16 inches.


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Old 03-01-2012, 01:11 PM   #42
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RJ,, I included some of that in my earlier post.. Or so I thougnt. (Wondered what happened to it)

But I gave instructions for finding the figure, which was the important part, and that... is still there. Including the link to the path of knowledge.
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