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General control line discussion => Open Forum => Topic started by: Bootlegger on January 07, 2017, 10:48:21 AM

Title: Mathmatics Majors...
Post by: Bootlegger on January 07, 2017, 10:48:21 AM

 Where might I get a copy of math formulas such as the volume of a cylinder and other simple math formulas?  Thanks a lot...
Title: Re: Mathmatics Majors...
Post by: Motorman on January 07, 2017, 11:15:17 AM
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Title: Re: Mathmatics Majors...
Post by: Dan McEntee on January 07, 2017, 12:13:55 PM
  Get yourself a "Pocket Reference" book by Thomas J Glover. I see them at the local hardware store, and should be available on line somewhere if you can't stumble across one in a book store. About a 3" by 5" paper back book withh 542 pages of just about anything you'll ever need. A Machinist Bible or Handbook is handy to have. They are expensive new, but can be found used just about everywhere. It is full of useful information also. Then there of course is the internet but the Pocket Reference book fits in a tool box where nothing else will and no need for Wi-Fi!
   Type at you later,
   Dan McEntee
Title: Re: Mathmatics Majors...
Post by: Brett Buck on January 07, 2017, 12:49:49 PM
Google for "mensuration". And unless you want be a biology major, be sure and spell it correctly.
Title: Re: Mathmatics Majors...
Post by: Larry Fernandez on January 07, 2017, 01:19:08 PM
Google for "mensuration". And unless you want be a biology major, be sure and spell it correctly.

This is why Brett is known as the third biggest smart-ass in stunt.

Larry, Buttafucco Stunt Team
Title: Re: Mathmatics Majors...
Post by: Dane Martin on January 07, 2017, 02:57:20 PM
Google for "mensuration". And unless you want be a biology major, be sure and spell it correctly.

Ha!
Title: Re: Mathmatics Majors...
Post by: Randy Cuberly on January 07, 2017, 06:36:10 PM
This is why Brett is known as the third biggest smart-ass in stunt.

Larry, Buttafucco Stunt Team

 LL~ LL~ LL~ LL~ LL~ LL~ LL~ LL~ LL~ LL~ LL~ LL~ LL~ LL~ LL~ LL~ LL~ LL~ LL~

Hey you gotta admit...It was FUNNY !

Randy Cuberly
Title: Re: Mathmatics Majors...
Post by: Brett Buck on January 07, 2017, 06:41:55 PM
This is why Brett is known as the third biggest smart-ass in stunt.

   We're #3 - We Try Harder.

    Brett
Title: Re: Mathmatics Majors...
Post by: Randy Cuberly on January 07, 2017, 07:16:32 PM
Actually a copy of "Machinery's Handbook" is probably one of the handiest texts that any modeler, tinkerer, machinist or for that matter engineer, can have close at hand!

They are expensive but older ones can be found reasonably priced and for practical application are just as good!

Randy Cuberly
Title: Re: Mathmatics Majors...
Post by: Scott Richlen on January 08, 2017, 05:59:14 AM
just claim that it is the length squared divided by pi cubed....

...then wait for Brett to correct you.

See?   There's always an easier way!
Title: Re: Mathmatics Majors...
Post by: Chuck_Smith on January 08, 2017, 09:36:27 AM
Try GOOGLE.

It's been making us engineers look like geniuses since 1996.
Title: Re: Mathmatics Majors...
Post by: Gordon Tarbell on January 08, 2017, 11:05:20 AM
For a cyl in cu. in. I have used for 45 yrs. is Bore X Bore X .7854X height"(or stroke for gear heads) = area in cubic inches.
Title: Re: Mathmatics Majors...
Post by: RandySmith on January 08, 2017, 11:27:17 AM
 Swept Volume = 3.14159 x (Bore/2) x (Bore/2) x Stroke
Title: Re: Mathmatics Majors...
Post by: Brett Buck on January 08, 2017, 11:33:19 AM
For a cyl in cu. in. I have used for 45 yrs. is Bore X Bore X .7854X height"(or stroke for gear heads) = area in cubic inches.

   That gives the correct answer. The volume of any item of constant cross-section (like a cylinder with parallel ends) is the cross-sectional area * length. The area of a circle is pi*r^2, so the volume is the l* pi*r^2,   Squaring the bore puts in an extra factor of 4, using pi/4 removes it.

     Brett
Title: Re: Mathmatics Majors...
Post by: Scott Richlen on January 08, 2017, 02:18:57 PM
..... and according to Google, pi divided by 4 is 0.785398163     ;D