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Author Topic: Screened bottom board  (Read 1645 times)

Offline Acebird

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Re: Screened bottom board
« Reply #20 on: June 05, 2018, 10:15:53 pm »
Bill there is a whole lot of science that goes into forecasting weather and still their track record here is about 50%.  I would suggest to the forecasters to read the Farmers Almanac and bring their numbers up 10% but that would be believing in ignorance.
Brian Cardinal
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Offline eltalia

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Re: Screened bottom board
« Reply #21 on: June 05, 2018, 11:11:40 pm »
Bill there is a whole lot of science that goes into forecasting weather and still their track record here is about 50%.  I would suggest to the forecasters to read the Farmers Almanac and bring their numbers up 10% but that would be believing in ignorance.
I understand it was LJ who first used rain/moist warm air as an analogy however it is a very
long stretch to join weather as a "living organism" as you appear to attempt, and whilst we
(b'keeps) entertain such fancifullness there always will be 10 answers to one question - or
whatever numbers are flavour of the day. :-((

The whole of the answer to hive body environments lies in science.
The prime being physics, well known.
The secondary being bee biology, also well known yet rarely understood.

As put, both can be aired in a specific topic, elsewhere.

Bill

Offline Dustymunky

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Re: Screened bottom board
« Reply #22 on: June 06, 2018, 12:44:48 am »
If anyone is in Portland, OR area I will gladly give you 3 slightly used SBB.  I dont use them anymore. I dont think bees like that much ventilation. I also think it causes the bees headaches when paired with bottom entrance. Bees are forced to walk across the screen to exit and enter. Their feet are like little grappling hooks and just watching them it looks like they struggle to walk on the screen.

Offline little john

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Re: Screened bottom board
« Reply #23 on: June 06, 2018, 04:17:36 am »
FWIW - earlier I said the issue was down to timing.  By 'timing' I was referring of course to the physical characteristics of a molecule of air - and thus it's behaviour - changing over a period of time: at first it's made heavier than air due to evaporative cooling; later - if it still remained within the cavity - it would begin to warm, and eventually become lighter by virtue of this, such that it would then ascend.

(Paragraph deleted by admin) PM sent.


However - let's take a look at an example of such passive gaseous exchange:
During winter, the front entrances of even my largest beehives consist of 2x 22mm diameter holes.  If you run the figures, that's 1.18 sq.in.  On some hives - notably those few I still have with solid floors - the entrances have been reduced by the bees with propolis to between 12 and 15mm diameter.  Staying with the higher figure, that's 0.55 sq.in.

The OMF's I use have an area of 290 sq.in.  That give us a comparative surface area ratio of between 300 and 530 to 1.

(Paragraph deleted)

But I will not enter into pointless discussions about this issue anymore, as I have far more important things to be doing with my time.  My over-winter losses have been 0% for many years now, and I no longer see either chalk brood or nosema.

Cordially yours,
LJ
« Last Edit: June 06, 2018, 07:57:44 am by sawdstmakr »
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Offline sawdstmakr

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Re: Screened bottom board
« Reply #24 on: June 06, 2018, 08:02:52 am »
This board is not here to insult other members. I have removed the insulting paragraphs. I would have removed the entire reply but there is good info here. There is no need to throw the insults, just state your case.
Jim

Offline Acebird

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Re: Screened bottom board
« Reply #25 on: June 06, 2018, 08:51:46 am »
The prime being physics, well known.
The secondary being bee biology, also well known yet rarely understood.

I think you have them reversed Bill.  However, both are sciences with boo coo variables.
I have read that bees control the hive environment to 50-60% RH.  It is easy for me to understand how they do that when it is 20% outside the hive.  I can't figure out how they do it when it is 80% outside the hive.  We do it in our homes with a condenser.
Brian Cardinal
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Offline sawdstmakr

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Re: Screened bottom board
« Reply #26 on: June 06, 2018, 10:39:15 am »
Ace,
I would like to know the same thing. 85% RH is our low during the day. 95 to 98 at night.

Offline eltalia

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Re: Screened bottom board
« Reply #27 on: June 06, 2018, 11:53:43 am »
@Acebird
"boo coo variables" is not something in my vocab archive Brian,
a tag eyed with suspicion rising only.
It is easy enough to cherrypick an element of ambient to
then argue around an individual's understanding of
componentry... pointless though without the deeper knowledge
of basics being apparent at the start.

As put, if genuine interest on the whole of the topic spurs
the topic elsewhere I am happy to build that and not hijack this
thread.

Bill

Offline Acebird

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Re: Screened bottom board
« Reply #28 on: June 06, 2018, 01:06:57 pm »

As put, if genuine interest on the whole of the topic spurs
the topic elsewhere I am happy to build that and not hijack this
thread.

Bill

One only needs to start a new topic and that can be answered.
Brian Cardinal
Just do it

Offline eltalia

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Re: Screened bottom board
« Reply #29 on: June 06, 2018, 04:36:04 pm »

As put, if genuine interest on the whole of the topic spurs
the topic elsewhere I am happy to build that and not hijack this
thread.

Bill

One only needs to start a new topic and that can be answered.

Wellll, off you go Brian...get to it to "just do it".
My post (#19) even hands you the topic banner, in plain english. :-))

Bill