[Tom White]

Hi guys,

I've been offered a swop of a 600 litre unbaffled tank for my 400 litre baffled tank.

Is an unbaffled tank safe to drive with?

Or is it possible to baffle it yourself?  I'm sure I've read a post about someone doing it (Roy Harding I think it was).

What d'yu reckon? 

[matthewprice]

would you want to take that risk with over 1/2 ton behind you to save £200

[christopher b]

its ok as long as you dont mind the water deciding where or when you are going to turn, or if you dont mind being splatered like a fly if you have a head on
would cost more to baffle it yourself,

[taylored]

Thanks a lot Tosh got that pole end your a star 

[mci services]

I don't think 600l is within your payload by the time you add all the other gear

[Tom White]

I don't think 600l is within your payload by the time you add all the other gear

Yeh, but I could fill it upto 500 and then stop! 

Okay, guys, I hear ya!  I'll decline the offer.

Thanks.

[Tom White]

Thanks a lot Tosh got that pole end your a star 

No problems, it's nice to be helpful.   

[weetot]

Did'nt someone once post on here about using polystyrene blocks in the tank as baffles??

[Spruce]

Would only fit a baffelled tank.

[Matt Gibson]

I heard somewhere you can use pieces of guttering downpipe cut to size to baffle with..

[luther1]

I heard somewhere you can use pieces of guttering downpipe cut to size to baffle with..

Thats the way my Ionics is baffled. And simple to diy

Is it just a basic 600litre tank Tosh or is it caged?

You will find you and wor lass running out of water at some point so a bigger tank might be handy

[mikecam]

Here we go again !! Take a bit of knowledge like a baffled tank reduces sway/lag or whatever and then exaggerate it that anything that is unbaffled is dangerous. A 5 or 600 litre tank unbaffled is not dangerous or a liability. Here is a baffled 500 litre tank........


here's another shot of it........




Now the reality is that the baffling does not do a lot to aid  reducing any tank roll/sway. But the fact it does have a baffle will keep most simpletons happy. Baffling a fluid tank is primarily for reducing surge from a long cylindrical tank, NOT these small cuboid tanks we have in our vans.

[Smudger]

Nice post mike !





Darran






tank and vans quite smart as well

[CLEANCARE WC]

mikecam it looks like your in the proces of making a sandwich board?

[Steven Shoreditch]

He's going water boarding.

[Tom White]

mikecam it looks like your in the proces of making a sandwich board?

Maybe?

[Steven Shoreditch]

 

(cheesy sandwich board)

[christopher b]

Here we go again !! Take a bit of knowledge like a baffled tank reduces sway/lag or whatever and then exaggerate it that anything that is unbaffled is dangerous. A 5 or 600 litre tank unbaffled is not dangerous or a liability. Here is a baffled 500 litre tank........


here's another shot of it........




Now the reality is that the baffling does not do a lot to aid  reducing any tank roll/sway. But the fact it does have a baffle will keep most simpletons happy. Baffling a fluid tank is primarily for reducing surge from a long cylindrical tank, NOT these small cuboid tanks we have in our vans.

they would not put them in if there was no reason for it, they are there to aid not when tank is at its fullest but as it is emptying.
the baffles are there to counteract slosh, the lateral movement of fluid within a tank. lateral fluid movement produces presure in both horizontal and vertical planes and in both liquid and gas states
this presure transfers through the vessel and suporting structure.
presence of baffles
could help reduce the peak magnitude of lateral slosh force
developed under applications of simultaneous lateral and
longitudinal acceleration excitations, and that an oblique
placement of transverse baffles would yield greater reduction
in the peak lateral force. This is attributed to the oblique
baffles providing considerable resistance to slosh in both roll
and pitch planes.

should you need the mathimatical calculations for working the diference out then here
http://www.benthamscience.com/open/totj/article/V004/23TOTJ.pdf
I would have typed the equations on here but it dont like the fonts

yes I mentioned gas before, what is above the water in a tank? dont say nothing! its air and air is a gas. tanks are vented to both allow air to enter as liquid exits and also to stop presure spikes during slosh

you also have mass vs weight, given 1 kg = 9.8 newtons then a 500 ltr tank would be 4.900 newton. put this 500 ltr in a 600 tank and you will have all this moving around. though the water at the bottom will be moving a lot less due to the upper mass.

Well that’s it for now and just to be extra polite i will refrain from using the word simpleton...

[Frankybadboy]

Here we go again !! Take a bit of knowledge like a baffled tank reduces sway/lag or whatever and then exaggerate it that anything that is unbaffled is dangerous. A 5 or 600 litre tank unbaffled is not dangerous or a liability. Here is a baffled 500 litre tank........


here's another shot of it........




Now the reality is that the baffling does not do a lot to aid  reducing any tank roll/sway. But the fact it does have a baffle will keep most simpletons happy. Baffling a fluid tank is primarily for reducing surge from a long cylindrical tank, NOT these small cuboid tanks we have in our vans.

they would not put them in if there was no reason for it, they are there to aid not when tank is at its fullest but as it is emptying.
the baffles are there to counteract slosh, the lateral movement of fluid within a tank. lateral fluid movement produces presure in both horizontal and vertical planes and in both liquid and gas states
this presure transfers through the vessel and suporting structure.
presence of baffles
could help reduce the peak magnitude of lateral slosh force
developed under applications of simultaneous lateral and
longitudinal acceleration excitations, and that an oblique
placement of transverse baffles would yield greater reduction
in the peak lateral force. This is attributed to the oblique
baffles providing considerable resistance to slosh in both roll
and pitch planes.

should you need the mathimatical calculations for working the diference out then here
http://www.benthamscience.com/open/totj/article/V004/23TOTJ.pdf
I would have typed the equations on here but it dont like the fonts

yes I mentioned gas before, what is above the water in a tank? dont say nothing! its air and air is a gas. tanks are vented to both allow air to enter as liquid exits and also to stop presure spikes during slosh

you also have mass vs weight, given 1 kg = 9.8 newtons then a 500 ltr tank would be 4.900 newton. put this 500 ltr in a 600 tank and you will have all this moving around. though the water at the bottom will be moving a lot less due to the upper mass.

Well that’s it for now and just to be extra polite i will refrain from using the word simpleton...

well if there was a award for a brill post then christopher please stand up.

[STEVE-UK]

imo opinion the baffled tanks that are on the market like in the previous image are not adequately baffled, i have a layflat 750 "Baffled" tank in our renault trafic and it is hopeless there is still way to much slosh, i have resorted to baffling out this tank with polypipe costing an additional £50, in my 1st van i had a 640 ibc tank baffled with polypipe and there was no movement what so ever, the upright 650 we have in the transit is not as bad but still suffers a little from slosh