Silly Question thread

[DAKA]

Have we ever had a silly question thread ?
Just thought we could post daft things that niggle you but not worth a post on their own.

Like if my engines are running 35-50 psi , why doesn't the dipstick get ejected out like a spear gun harpoon

 

[bigwow]

Granddaughter came home from school after learning about Australia, and how it was the other side of the globe from us and asked me why the people down there did not fall off as they were upside down. I nearly choked on my coffee

 

[the-drifter]

when a user ring the IT, and asked " when you say press any key" where is it on the keyboard....!

 

[CharlieAlpha]

when a user ring the IT, and asked " when you say press any key" where is it on the keyboard....!

if only life had an undo button

 

[Montemar]

Have we ever had a silly question thread ?
Just thought we could post daft things that niggle you but not worth a post on their own.

Like if my engines are running 35-50 psi , why doesn't the dipstick get ejected out like a spear gun harpoon

As force=pressureXarea it would seem that the small cross sectional area of the dipstick X 50psi does not provide sufficient force to overcome frictional resistance in the dipstick tube and/or resistance of any detent therein.

 

[burgundyben]

As force=pressureXarea it would seem that the small cross sectional area of the dipstick X 50psi does not provide sufficient force to overcome frictional resistance in the dipstick tube and/or resistance of any detent therein.

God almighty....I hope I'm missing the humour here and you guys really do know the answer.

 

[zt260]

My grandaughter asked, do hamsters come from amsterdam
could somebody please confirm the answer to this question for a confused 6 year old Doh

regds ashley

 

[rafiki_]

As force=pressureXarea it would seem that the small cross sectional area of the dipstick X 50psi does not provide sufficient force to overcome frictional resistance in the dipstick tube and/or resistance of any detent therein.

Actually, there should be a breather in the system, so there is no substantial pressure in the crankcase.

 

[sarabande]

my daughter's hamster died a number of years ago. She asked how we could dispose of the body.


A friend of hers phoned and said, "Just put the hamster in a pan with plenty of water, a spoonful of sugar, and boil it for 30 inutes; then put the body into a grave in the garden."

So she did as instructed.


That Spring , we had a magnificent display of tulips, far exceeding anything we had before.

It only goes to prove that you DO get tulips from Hamster Jam.







coat, yes, door yes, I close it on the way out...

 

[sarabande]

Like if my engines are running 35-50 psi , why doesn't the dipstick get ejected out like a spear gun harpoon

Becasue the oil pressure guage measures, err, oil pressure, and the dipstick is not connected to the oil pressure system, but to the oil level system. Nowt about friction....

 

[kid's inheritance]

Why do modern helm displays show most information twice?
Why do we persist in having our own separate vocabulary?
Why do boat bits have two or three names for the same bit?
Why is any cleaning product that has a picture of a boat on it 3 times the price of one with a car on and 5 times the price of one with a house on it?
Why if every helm has a seat are the controls never at foot level?
Why haven't fuel tanks holding £000's of fuel lockable?
Why don't people who all love boats talk to WAFI's/frothblowers?
Why are all of us frightened to work out how much these bl##dy things work out per hour we are on them?
Why is the forecast so rubbish for the longest weekend of the year?
Rob

 

[nauticalnomad]

Have we ever had a silly question thread ?
Just thought we could post daft things that niggle you but not worth a post on their own.

Like if my engines are running 35-50 psi , why doesn't the dipstick get ejected out like a spear gun harpoon

Ive got a welding question?

Can i weld a human arm back onto a shouler using a finger as a filler rod.??

 

[gordmac]

If the shoulder and arm are from different people you need to use a dissimilar finger.

 

[Simondjuk]

Like if my engines are running 35-50 psi , why doesn't the dipstick get ejected out like a spear gun harpoon

Now that is a truly silly question.

 

[Searush]

Have we ever had a silly question thread ?
Just thought we could post daft things that niggle you but not worth a post on their own.

Like if my engines are running 35-50 psi , why doesn't the dipstick get ejected out like a spear gun harpoon

I thought all your threads were silly questions of colreg Trolls?


And the answer to your question is that 50psi isn't even enough to get the oil up the dipstick vent is it? AND the dipstick isn't sealed in the tube even if the pressure was adequate.

 

[Lakesailor]

Actually, there should be a breather in the system, so there is no substantial pressure in the crankcase.

Now I'm worried.

 

[Simondjuk]

I can't not answer this any longer.

The only significant source of pressure in the crankcase, and thence the sump, is from blow-by. If there's a lot of it, your engine is tired.

The reason the oil pressure doesn't push the dipstick out is because the dipstick is a tube which goes into the sump, and the oil in the sump is not pressurised. It is simply a reservoir. In fact, you don't even need to keep the oil there if you don't want to. You can have a dry sump system, which is used mainly on racing cars to prevent oil starvation due to surge. It also reduces winding losses, but perhaps this is going into too much detail.

The oil in the sump of your boat is at, or very close to, atmospheric pressure until it is drawn from the sump, by the pump, where it is pressurised. The resistance against which the pump generates the oil pressure seen on the gauge is provided by the limited escape routes for the oil after the pump. The primary routes are the clearances in the engine's bearings into which the oil is fed and the jets which squirt oil onto the cam lobes and onto the bores under the pistons.

Once the oil has escaped from the little spaces between the bearing shells and the crankshaft, camshaft and whatever other delivery points it's been pumped to, it is no longer pressurised as it has escaped from the resistance causing tight spots, and dribbles, at atmospheric pressure, back to the sump.

The sump and the oil within it does not get pressurised to tens of pounds per square inch by the oil pump.

Here is a picture. It is of an engine. It shows the pressurised oil ways as straight lines and the unpressurised oil as drips making their way back to the sump and as wavy lines once in volume in the sump.

 

[DAKA]

Thankyou Simondjuk

Very comprehensive and easily understood response .


Just need searush to realize there is always more to my posts than appears at first glance

 

[Davy_S]

Most dipsticks do indeed start to blow out of the hole, it is because they have oil on them that they slip back down again. that is why manufactors fit a loop at the top of them, so that you can tie them down. It should be obvious really.

 

[RobWales]

?

Can you only cook pancakes in your air filter?