Anti-siphon loop for engine

[macd]

Hmmm, interesting concept, that, water pulling......

Nah. He meant that the curvature of space-time does the pulling.
And, as my old physics teacher used to bang on, there's no such thing as suction.
Or Santa.
Merry Christmas, all.

 

[RichardS]

Nah. He meant that the curvature of space-time does the pulling.
And, as my old physics teacher used to bang on, there's no such thing as suction.
Or Santa.
Merry Christmas, all.

"Suction" is JumbleDuck's hypothesis. Nothing at all to do with me as I passed O-level physics ..... and A-level (Grade A actually).

Richard

 

[macd]

"Suction"...Nothing at all to do with me

Sorry. Didn't mean to imply that it was, Richard.
Have a good one.

 

[JumbleDuck]

Once you are below the 32 feet limitation all that matters is the weight of water in the two sides of the U-column. Simply put, the heavier side will always pull the lighter side over.

True, I don't think that works when there is a pressure limiting factor at work, like the liquid-vapour transition above 32' head. The pressure at the top of a 20' column is lower than the pressure at the top of a 10' column, so fluid will flow at a rate where the friction head balances things out, but the pressure at the top of a 60' column is the same as the pressure at the top of a 40' column, so nothing needs to flow.

 

[JumbleDuck]

Hmmm, interesting concept, that, water pulling......

It's up there with centrifugal force and coolth - fine to use if you know what you're doing, best avoided by school physics teachers.

 

[VicS]

best avoided ................ school physics teachers.

+ a million

 

[rogerthebodger]

+ a million

Hi Vic Just remind me again what you used to teach ?

 

[VicS]

Hi Vic Just remind me again what you used to teach ?

I was never a teacher. No way!

 

[rogerthebodger]

I was never a teacher. No way!

Didn't you used to work in a school lab, maybe I just assumed wrongly you were a teacher.

 

[macd]

Didn't you used to work in a school lab, maybe I just assumed wrongly you were a teacher.

No need to assume: "Retired industrial Chemist".

 

[VicS]

No need to assume: "Retired industrial Chemist".

OTOH Roger might know me a little better than you realise...........

 

[Heckler]

The 32 feet consideration is all about air pressure and whether the weight of the column of water exerts more or less pressure than atmospheric. In normal circumstances this is only relevant to the higher/source water level.

Once you are below the 32 feet limitation all that matters is the weight of water in the two sides of the U-column. Simply put, the heavier side will always pull the lighter side over.

Richard

Bit like a halyard when you let go of it!
i undestand what you mean!
Stu

 

[rogerthebodger]

No need to assume: "Retired industrial Chemist".

Yes I know that. When we meet Vic several years ago, 2005 I think, we had a long chat and had Tea with him and his wife. I seem to remember Vic did some work in a lab which I think was attached to a school of college but my memory is going a little.

Sorry Vic if I am giving your secrets away

 

[RichardS]

Bit like a halyard when you let go of it!
i undestand what you mean!
Stu

Exactly the same Stu. The only difference is that heavy side of the halyard always seems to be the section that runs down inside the mast! :ambivalence:

Richard