Mathematically intelligent wanted.
Submitted: Wednesday, May 10, 2006 at 19:07
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cokeaddict
Ok now i have ur attention.....I have been toying with the idea of fitting stormwater pipes under my offraod trailer.Was thinking of a continuous length which worms its way from front to back using U connectors. I would naturally fit a sheet under it that protects the pipes from damage.
My question is....How do you calculate how much water the pipe will hold if i use 100mm pipe. Lets just say for the exercise of this calculation that the total length of the pipe will be 10 mtrs.
Any takers...sorry maths was NOT my fav subject.
P.S. Please dont hit me with the negatives of trying this, I have plenty of room under there even with the extra sheet to protect the pipes. I only use the trailer for family camping weekends, so serious 4wding is not an issue.
Reply By: Sand Man (SA) - Wednesday, May 10, 2006 at 20:10
Wednesday, May 10, 2006 at 20:10
Ange,
Don't wish to sound negative mate but why would you opt for a pipe to hold water rather than a purposely designed
water tank. The tanks are readily available from Caravan supply outlets and can be located to give you positive, negative, or neutral balance at the tow ball.
I couldn't think of anything worse than 40 odd litres of water surging backwards and forwards along the length of the pipe when it's half empty. (or half full)
I used to transport two or three 20 litre containers of water when I used the off-road 7x4 trailer to travel. There was plenty of room for them.
AnswerID:
171995
Reply By: Member - Darren T (VIC) - Wednesday, May 10, 2006 at 22:53
Wednesday, May 10, 2006 at 22:53
Um, I`ll just try and make it sound a bit easier, a cube of 10cm x 10cm x 10cm holds 1 litre of water.
So with the same principle - does this mean a 100mm pipe that is 100mm long will hold slightly less than 1 litre?
I say slightly less because PVC pipe sizes are measured in outside diameters. So obviously if you had a peice of pipe that had a sidewall thickness of 5mm will hold less than a peice with a sidewall thickness of 2mm.
I`m sure if I am wrong someone will tell me in many ways why :).
AnswerID:
172048
Follow Up By: V8 Troopie - Thursday, May 11, 2006 at 01:08
Thursday, May 11, 2006 at 01:08
Darren, a cube is... cubic and a pipe is.... round. Your 10cm long pipe will hold a LOT less than 1 L
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Follow Up By: agsmky - Thursday, May 11, 2006 at 14:27
Thursday, May 11, 2006 at 14:27
Darren, most water pipe is measured with the Internal Diameter (ID), except for Poly (the black stuff) which is measured with OD.
Andrew
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427713
Reply By: Member - Bradley- Thursday, May 11, 2006 at 02:23
Thursday, May 11, 2006 at 02:23
Ange, save the stress of cutting and gluing and supporting all of it, not to mention the cost of all the elbows etc. and install 2 70 lt camec caravan tanks, the ones with all the fittings threaded, to allow proper fill pipes and breathers. put 1 in front and one behind the axle, so as to not affect the balance. i think they are about $ 80-90 each.
Ive got one under our trailer, and it is grouse.
AnswerID:
172071
Follow Up By: V8Diesel - Thursday, May 11, 2006 at 08:09
Thursday, May 11, 2006 at 08:09
Good call Bradley. A mate of mine just fitted two of them in the tray of his Navara too. Works well, looks professional, not too expensive and was available of the shelf from Camec (?) in Welshpool Rd.
I asked the bloke what the difference between an off-road and on-road tank was and he said "a thin strip of rubber between the tank and the strap". Reckons they don't give any problems.
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Reply By: cokeaddict - Thursday, May 11, 2006 at 13:07
Thursday, May 11, 2006 at 13:07
WOW.....some real smart people in here....but i already knew that !!!!
Thanks to everyone who replied. It is very much apreciated.
I will sit down and think it through again. Some very good ideas tossed in too.
Just for those who were suggesting the pipes would break due to stones ....I had a plate designed on paper that was a second floor to protect the pipes. Pipes were not visible at all once the steel plate was in place, and i can get the pipes for nothing. That was my reason for fitting them on.
Ange.
AnswerID:
172131
Follow Up By: gottabjoaken - Thursday, May 11, 2006 at 15:02
Thursday, May 11, 2006 at 15:02
Cokie,
I reckon the water surging back and forwards in a pipe will very quickly rip it from whatever mountings you use, if it doesn't blast the end off the pipe first.
Imagine 50 kg sliding up and down the trailer...
Ken
FollowupID:
427719