Chez
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Maths help, please?I am watching a big saucepan on eBay (where else!) that is 10inches deep and is oval in shape, 13 inches at the widest part, 9 inches across the narrowest. Please could someone work out roughly how many cubic inches it's volume would be? (I've found a widget that will convert cubic inches to litres, so I can do that bit  )
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Drewsephine
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13x9 =117
117x0.8 =93.6
93.6x10 = 936cu in
I think
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Chez
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Thank you. I don't understand what you've done, but so long as it works ...  .
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Drewsephine
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To calculate the area of an oval you must multiply the width (13) times the length (9), then multiply the result by 0.8.
Then multiply by depth (10) for area cubed.
I think.
I'll probably be proved wrong by a smart alec 6year old
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Chez
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No, that makes sense! I didn't know about the 0.8 bit. That means that it's 15 litres (or 30 pints, ish), which is almost, but not quite, large enough to boil 4 gallons. I'm looking for something to ideally do 5 gallons at a time (for beer) - but this is quite cheap and on the other hand I probably won't be able to lift something much heavier than that off the stove.
Gah.
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James
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Area of an elipse = Pi x radius1 x radius 2
radius 1 = ((13 inchs x 2.56) /2) =16.6 cm
radius 2 = ((9 inchs x 2.56) /2) = 11.5 cm
Area of pan = 3.14 x 16.6 x 11.5 = 600cm2
Depth of pan = 10 x 2.56= 25.6 cm
Volume of pan = 25.6 x 600 = 15,360 cm3
Capacity to brim = 15.36 litres or just over 3 gallons,
Usable volume = 2.5 gallons
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ksia
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Not sure about Drew's maths.
the area formula for an ellipse is half width x half length x pi:
6.5 x 4.5 x 3.14 then multiply by height to get the volume:
6.5 x 4.5 x 3.14 x 10 = 920 (approx) cubic inches
Drew's 0.8 is an approx value of pi / 4 (=0.7
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ksia
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my last bit should say 0.78. I can't get rid of that smiley thing.
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James
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put a space between the 8 and the )
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ksia
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and converting to litres gives 15.4 - agreed James!
I'll remember the space thing for next time. Ta.
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Chez
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Oh god, I've started a Maths War Thread. Sorry
How does the 'usable volume' thing work, James? Is this a well-know thing that I haven't heard of? Or just a rule of thumb that you use? I reckon that for litres to pints one doubles it ... so 15 litres would be just under four gallons. Or am I being too imprecise?
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Fee
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Why did I open this thread, exactly? I was hardly likely to be able to offer maths help, and now you've made me actually think!
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ksia
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| Chez wrote: | Oh god, I've started a Maths War Thread. Sorry
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No you haven't - Drew's method is a nice approximation and me and James agree. All's quiet on the Maths front.
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yummersetter
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contact seller, ask them to pour measured water into saucepan -forget maths, just remember a pint of water weighs a pound and a quarter
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James
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| Chez wrote: |
How does the 'usable volume' thing work, James? Is this a well-know thing that I haven't heard of? Or just a rule of thumb that you use? I reckon that for litres to pints one doubles it ... so 15 litres would be just under four gallons. Or am I being too imprecise? |
yep, you're about as right as I am. I guessed downward, you guessed upward...the reality is somewhere inbetween.
15.36 litres is (15.36 x 4.5) 3.4 gallons
The ".4" bit of that is in base 10, so to convert that to pints (base 8 ), I devide by 10 and times by eight to get 3 pints.
So its 3 gallons, 3 pints
The usable volume thing is just a guess. Its so easy to see something that says a volume and then realise that thats to the very brim and you can only use 3/4 of that volume safely.
If your boiling wort, I wouldnt fill more than 2/3 full.
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Chez
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At the moment I'm using a maslin pan that has no lid ... hence the kitchen fills up with steam. I'll keep looking.
Thanks for your help everyone.
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vegplot
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Oh, and it's tapered, and has a dent.
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Chez
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Quoi?
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vegplot
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The maths is so much harder.
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James
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do you need to cook up 5 gallons of wort? I used to make 3 gallons of (slightly concentrated..) wort in a 4 gallon pan, then water it down. (thats how they make Courage Best)
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Chez
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| vegplot wrote: |
The maths is so much harder. |
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Drewsephine
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| ksia wrote: | Not sure about Drew's maths.
the area formula for an ellipse is half width x half length x pi:
6.5 x 4.5 x 3.14 then multiply by height to get the volume:
6.5 x 4.5 x 3.14 x 10 = 920 (approx) cubic inches
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Close enough for government work
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Chez
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| James wrote: | | do you need to cook up 5 gallons of wort? I used to make 3 gallons of (slightly concentrated..) wort in a 4 gallon pan, then water it down. (thats how they make Courage Best) |
That's kind of what we do at the moment. My maslin pan will take 3 gallons. I'm wondering whether it effects the flavour, though? The last few times I've boiled up an additional two gallons in other saucepans and divided the hops and spraymalt between them, but that's a real faff.
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vegplot
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Thanks. I was wracking by brains trying to recall what Avro recommended when we were playing Satan Claws on your roof.
Edit: Avro? Sorry Arvo.
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James
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| Chez wrote: | | I'm wondering whether it effects the flavour, though? The last few times I've boiled up an additional two gallons in other saucepans and divided the hops and spraymalt between them, but that's a real faff. |
Its a matter of opinion but personally I'd say if your doing it from grain then yes it does effect the flavour, but if your doing it from syrup or spray malt, then no it doesnt. I say this becuase the prepared malts have already been concentrated down, and in so doing have lost the delicate flavour that is present on fresh malt.
If you're using spraymalt, I'd just boil the hops with *some*spray malt in your largest pan. Dissolve the rest of the malt in the bucket to avoid caramelisation while boiling (spray malt doesnt need to be boiled). Then dilute to 5 gallons in the bucket. Saves a lot of faffing and expense.
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ksia
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[/quote]
Close enough for government work
[/quote]
You don't do Brown's economic forecasting do you?
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ksia
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Oh I'll never get the hang of these quotes and smileys and things.
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Shane
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| Chez wrote: | | At the moment I'm using a maslin pan that has no lid ... hence the kitchen fills up with steam. |
On the plus side, it must make the entire house smell really, really good
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Chez
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Not if you don't really like beer  . This is definitely a Labour Of Love for me; wine is my tipple of choice. Or cider, which I'm working on.
James - thanks, that's interesting advice, I'll give it a go. We do have a load of whatsited barley in the cupboard, courtesy of Mr Pookie ... but I can't get my heart up high enough to go for it.
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vegplot
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mmmmm Cider!
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sean
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| Chez wrote: | | Not if you don't really like beer . |
You're just not trying hard enough. *Anyone* can learn to love beer with a little effort. Mmmmm...beer...
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Drewsephine
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| sean wrote: | | Chez wrote: | | Not if you don't really like beer . |
You're just not trying hard enough. *Anyone* can learn to love beer with a little effort. Mmmmm...beer... |
Good call. Is it beer o'clock yet ?
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sean
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Not for me. I'm going to work in half an hour. On the bright side I'll be able to have a beer at work later.
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vegplot
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Not for me tonight. Had too much recently.
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Chez
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Well, I've been know to partake of the odd half of Coniston Bluebird when the weather's hot and I've been walking. But generally, beer tastes like horlicks to me. And I don't like horlicks .
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