alanporter
Well-Known Member
Does anyone know a formula for calculating the interior volume of a length of one and a half inch ID hose ? Thank you in advance.
<hr width=100% size=1>Alan Porter
<hr width=100% size=1>Alan Porter
Hose volume
- Thread starter alanporter
- Start date
aztec
Well-Known Member
quick way... 8 x Diameter squared (in cm) x length (in cm) X 10000. gives you litres.
or it's the old Pi times radius squared times length... in metres... times length gives you volume...
why? i can't possibly think what to intend to insert into a 1 1/2" pipe!!
well maybe i can... saturday night and it's late!!!
oh dear...
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or it's the old Pi times radius squared times length... in metres... times length gives you volume...
why? i can't possibly think what to intend to insert into a 1 1/2" pipe!!
well maybe i can... saturday night and it's late!!!
oh dear...
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alanporter
Well-Known Member
Aztec. Thanks for the info. Actually the reason I ask is that the hose from my toilet outlet to my holding tank is no less than twelve feet long, and I want to know how much clear water is going into the tank before the poop reaches it. Boat design problem.
Cheers
p.s. it might be late saturday night for you but it is only early afternoon here on the Pacific coast of Canada. We are eight hours behind you.
<hr width=100% size=1>Alan Porter
Cheers
p.s. it might be late saturday night for you but it is only early afternoon here on the Pacific coast of Canada. We are eight hours behind you.
<hr width=100% size=1>Alan Porter
HeadMistress
Well-Known Member
Uh-0h....12' from head to holding tank is WAY too far...no one will flush long enough to move bowl contents from the head to the tank...there'll always be waste left sitting in the hose to permeate it. 6' is the optimal distance...8' is pushing it...10' is the absolutely maximum--and that's only if the head is only used by the owners who know how long to flush.
That's the bad news. The good news is, you don't have to fill up your holding tank with flush water to clear the head discharge hose. Any marine toilet that's working anywhere near factory specs will move bowl contents at least 6' in the dry mode. So it's only necessary to use flush water to wet the bowl ahead of use and to rinse the bowl and head disccharge hose after use.
<hr width=100% size=1>Peggie Hall
Specializing in marine sanitation since 1987
That's the bad news. The good news is, you don't have to fill up your holding tank with flush water to clear the head discharge hose. Any marine toilet that's working anywhere near factory specs will move bowl contents at least 6' in the dry mode. So it's only necessary to use flush water to wet the bowl ahead of use and to rinse the bowl and head disccharge hose after use.
<hr width=100% size=1>Peggie Hall
Specializing in marine sanitation since 1987
jollyjacktar
Well-Known Member
I am having a bit of difficulty with your formula AZTEC, volume is Pi times diameter squared divided by 4 x length. If all the dimensions are in cm. then the volume will be in cubic cm [cc] divide this by 1000 and volume will be in litres = 3.14 x diameter squared divided by 1000 litres. IMHO this does not come to 8 times diameter x length x 10000 litres?
However, to progress with this problem, Pi times diam squared divided by 4 times length all in inches gives cubic inches volume, and about 277.25 cu inches is 1 imperial gallon. Thus a 12 ft hose would hold about 254 cu inches, about a bit under 1 gallon, 6 ft hose .5 of a gallon etc. Good luck with your calculations of the business.
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However, to progress with this problem, Pi times diam squared divided by 4 times length all in inches gives cubic inches volume, and about 277.25 cu inches is 1 imperial gallon. Thus a 12 ft hose would hold about 254 cu inches, about a bit under 1 gallon, 6 ft hose .5 of a gallon etc. Good luck with your calculations of the business.
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alanporter
Well-Known Member
I think Aztec was just having fun with his formula. Thanks for your input, Jollyjacktar, this explains why my holding tank gets full very rapidly.
I also appreciate the note from HeadMistress, who is well known for her knowledge on this subject on this side of the pond.
<hr width=100% size=1>Alan Porter
I also appreciate the note from HeadMistress, who is well known for her knowledge on this subject on this side of the pond.
<hr width=100% size=1>Alan Porter
G
Guest
Guest
Having trouble with the maths !!
Volume of a cylinder = Pi times Rsquared times length
Where Pi times Rsquared = cross sectional area of the cylinder.
The volume of your pipe is a) make sure that you measure across the inside diameter of the pipe and divide by 2 to get the radius.
Then Pi at 3.142 x radius x radius x length of pipe = volume in whatever units you have used ....... cm's = c.c's, inches = cubic inches etc.
Where all these dive by 8 etc. come from ?????
<hr width=100% size=1>Nigel ...
Bilge Keelers get up further ! I only came - cos they said there was FREE Guinness !
Volume of a cylinder = Pi times Rsquared times length
Where Pi times Rsquared = cross sectional area of the cylinder.
The volume of your pipe is a) make sure that you measure across the inside diameter of the pipe and divide by 2 to get the radius.
Then Pi at 3.142 x radius x radius x length of pipe = volume in whatever units you have used ....... cm's = c.c's, inches = cubic inches etc.
Where all these dive by 8 etc. come from ?????
<hr width=100% size=1>Nigel ...
Bilge Keelers get up further ! I only came - cos they said there was FREE Guinness !
BrendanS
Well-Known Member
Hey this is fun, Google is a calculator and I never knew it
Aztecs: Pi x radius squared x length
http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=pi+*+4+squared/4+*+100&btnG=Google+Search
(with radius 2, so diameter 4, and a length of 100)
Excellent!
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Aztecs: Pi x radius squared x length
http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=pi+*+4+squared/4+*+100&btnG=Google+Search
(with radius 2, so diameter 4, and a length of 100)
Excellent!
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aztec
Well-Known Member
Re: Having trouble with the maths !!
thought that's what i said?
8 times calc is a quick way of working out a metre of hose.... but'll cause too much confusion, ignore.
sorry but read thu' my reply... not exactly clear was it?
i appologise. why did he want to know?
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thought that's what i said?
8 times calc is a quick way of working out a metre of hose.... but'll cause too much confusion, ignore.
sorry but read thu' my reply... not exactly clear was it?
i appologise. why did he want to know?
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G
Guest
Guest
Seems he has a long shi**er
A long hose from bog to tank ...... needs to know how much water to put through to clear the poop !!
<hr width=100% size=1>Nigel ...
Bilge Keelers get up further ! I only came - cos they said there was FREE Guinness !
A long hose from bog to tank ...... needs to know how much water to put through to clear the poop !!
<hr width=100% size=1>Nigel ...
Bilge Keelers get up further ! I only came - cos they said there was FREE Guinness !
