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Degrees into inches
I have a Carl Goldberg Ultimate Bipe and the control throws are all listed in degrees and for the life of me I cannot figure how to convert degress into inches. The elevtor is 10 to 12 degrees. What does that work out to in inches? Thanks for yoru help, Dave
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RE: Degrees into inches
Dave, they make a lot of good devices for setting up control surface throw, why the need to know the length of the throw? You can get a compass at Wally World and use this. Doing it with a travel distance would b the hard way!
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RE: Degrees into inches
You would need to use the length of each surface to calculate the throw in degree. I would go buy a protractor myself for a dollar at the stationery store.
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RE: Degrees into inches
Buy one? Why waste the money ... [link=http://www.ossmann.com/protractor/]print one![/link]
-Al |
RE: Degrees into inches
Dave,
Measure the length of the control surface - perpendicular to the hingeline (front to back), multiply this by the sin of the angle and that will give you the deflection in inches at the control surface edge. For tapered control surfaces this will vary as you move inboard to outboard.... sin 10 = .1736 sin 12 = .2079 For a 1 inch length at 10 deg, the deflection will be .1736" or about 11/64" Hope this helps. Steve |
RE: Degrees into inches
Sin theta = opposite/adjacent. That's all you need to know to figure any angle, any time, anywhere.
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RE: Degrees into inches
ORIGINAL: ARUP Sin theta = opposite/adjacent. That's all you need to know to figure any angle, any time, anywhere. tan theta = opposite/adjacent For small angles they will be close to each other but we might as well get it right. Maybe we need one of Minnflyer's graphical simulations..... |
RE: Degrees into inches
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Here's a quick and dirty method that I use, gets close enough.</p> |
RE: Degrees into inches
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let's try again with the pic rotated!http://www.rcuniverse.com/forum/js/f...eeth_smile.gif
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RE: Degrees into inches
Well, sorry, no matter what I do the pic will not stay rotated when I save it. If you have adobe you should be able to rotate it when you open it. I used 1 1/2" for the elevator dimension, just substitute what ever your dimension isand you should get close enough, just remember that if you measure from the top surface of your stab , measure to the top surface of the elevator trailing edge and not the bottom or your angle will not be correct.
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RE: Degrees into inches
Hi!
Why bother with meassuring trows....I don't! Just go with what you are used to do before! This isn't rocket science you know...! Most planes need just one or two centimeter trow meassured at the back of each flying surface, except rudder where you use as much trow as you can. After the first flight ask yourself if you are sattiesfied with the planes behavoir and trim it if needed. It's very important that the C of g is changed so that trows can be minimized as much as possible,that means moving servos, batteries and other things as far rearward as possible. Don´t complicate thing that don´t need to be complicated! |
RE: Degrees into inches
Just use the TLAR method
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RE: Degrees into inches
ORIGINAL: jaka Hi! Why bother with meassuring trows....I don't! Just go with what you are used to do before! This isn't rocket science you know...! Most planes need just one or two centimeter trow meassured at the back of each flying surface, except rudder where you use as much trow as you can. After the first flight ask yourself if you are sattiesfied with the planes behavoir and trim it if needed. It's very important that the C of g is changed so that trows can be minimized as much as possible,that means moving servos, batteries and other things as far rearward as possible. Don´t complicate thing that don´t need to be complicated! |
RE: Degrees into inches
ORIGINAL: stevenmax50 Then I use my rates to bring it down, if needed. |
RE: Degrees into inches
ORIGINAL: raydar You would need to use the length of each surface to calculate the throw in degree. I would go buy a protractor myself for a dollar at the stationery store. And at the ripe old age of 70 and not an engineering type, I've forgotten all of that High School math. Sure would be nice if someone would post a simple formula (substituting the numeric value for Pie, sin, etc.) or a spreadsheet formula that we could all use for various purposes. I for one would really appreciate something like that. Thanks in advance to anyone who can do that, =Rick= |
RE: Degrees into inches
ORIGINAL: cstevenpeterson ORIGINAL: ARUP Sin theta = opposite/adjacent. That's all you need to know to figure any angle, any time, anywhere. tan theta = opposite/adjacent For small angles they will be close to each other but we might as well get it right. Maybe we need one of Minnflyer's graphical simulations..... |
RE: Degrees into inches
ORIGINAL: hugger-4641 let's try again with the pic rotated!http://www.rcuniverse.com/forum/js/f...eeth_smile.gif hook |
RE: Degrees into inches
ORIGINAL: MinnFlyer ORIGINAL: stevenmax50 Then Iuse my rates to bring it down, if needed. |
RE: Degrees into inches
ORIGINAL: golf4two ...........Sure would be nice if someone would post a simple formula (substituting the numeric value for Pie, sin, etc.) or a spreadsheet formula that we could all use for various purposes. I for one would really appreciate something like that. Thanks in advance to anyone who can do that, =Rick= |
RE: Degrees into inches
ORIGINAL: golf4two ORIGINAL: raydar You would need to use the length of each surface to calculate the throw in degree. I would go buy a protractor myself for a dollar at the stationery store. And at the ripe old age of 70 and not an engineering type, I've forgotten all of that High School math. Sure would be nice if someone would post a simple formula (substituting the numeric value for Pie, sin, etc.) or a spreadsheet formula that we could all use for various purposes. I for one would really appreciate something like that. Thanks in advance to anyone who can do that, =Rick= |
RE: Degrees into inches
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ORIGINAL: DavidAgar The elevtor is 10 to 12 degrees. This is 11 degrees |
RE: Degrees into inches
If I have to do math homework I quit.
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RE: Degrees into inches
Gentlemen, One degree equals .018 [.01745 sine of 1degree] drop or increase per inch. Example:aileron2"wide moving up or down 10* would travel 11/32"
Dihederal of 3*on a 60" wing would equal- .0174X60=1.047" or .523" per side. On the models we build just multiply the lengthx.020x# of degrees desired. Close enough. fredsedno |
RE: Degrees into inches
fredsedno
When I learned math, a number less that 5 rounds DOWN. i.e., .0174 = .017, not .018:-))))))))))))))))))))))))))))))))))))) Les |
RE: Degrees into inches
Fredsedno is correct, he rounded from the hundred thousandth's position. 0.01745 would round up to 0.018. Regardless, I always round up an extra 1/16" when setting throws.</p> |
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