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Nuisance fastners - winge

F

fritz

Jan 1, 1970
0
Sylvia Else said:
The application is to suck cool air in through an open window at night. During the recent heat wave, it was noticeable that even
though the temperature outside drops at night, the temperature of the house doesn't drop that much. The problem is lack of air
flow.

A conventional pedestal fan blows in such a direction that when it's placed as near as possible to a window, the fan blades are
still quite a way from the cool air, and so the result is not as effective as it might be. If I could reverse the direction of
flow, then I could also turn then fan around, so that the blades would be much closer to the window.

Stick the fan outside, blow the air inside. Lateral thinking is absent
in the female of the species.
I considered simply building a duct, but the cost of materials was excessive.

Rubbish - use paper and glue - you obviously have plenty of time
on your hands......
http://en.wikipedia.org/wiki/Papier-mâché
 
J

Jeffrey Angus

Jan 1, 1970
0
Electrically, in a PSC motor the windings are the same as a
center-tapped transformer, having 3 leads.

Does that mean it's two-phase?

Sorry, couldn't resist.

;-)

Jeff
 
S

Sylvia Else

Jan 1, 1970
0
Stick the fan outside, blow the air inside. Lateral thinking is absent
in the female of the species.


Rubbish - use paper and glue - you obviously have plenty of time
on your hands......
http://en.wikipedia.org/wiki/Papier-mâché

Do you have data for the structural properties? Also, a mathematical
model of the pressure differential across an insect-screen?

Sylvia.
 
S

Sylvia Else

Jan 1, 1970
0
Never seen them, but they would be perfect for what Sylvia wants to
achieve I think.
They are on Ebay, but all from the USA.

I found Lasko's web site. None of the instruction sheets (which I
thought might specify the power) seem to exist. So I emailed the
webadmin whose address was given on the web site. That email address
appears not to exist either (it bounced).

I hope they're better at making fans than they are at maintaining web sites.

Sylvia.
 
S

Sylvia Else

Jan 1, 1970
0
These fans are also available on Ebay - search "window fan" and
"outside australia" and
there are several identical models. The sellers might be able to
help ?

I presume I'd need to buy a step down transformer, and then there's the
issue of the different frequency.

Sylvia.
 
J

Jasen Betts

Jan 1, 1970
0
A conventional pedestal fan blows in such a direction that when it's
placed as near as possible to a window, the fan blades are still quite a
way from the cool air, and so the result is not as effective as it might
be. If I could reverse the direction of flow, then I could also turn
then fan around, so that the blades would be much closer to the window.

I considered simply building a duct, but the cost of materials was
excessive.

I guess you didn't consider cardboard and packing tape then :)
or a cheap plastic bucket?
 
A

atec77

Jan 1, 1970
0
I guess you didn't consider cardboard and packing tape then :)
or a cheap plastic bucket?
I can think of another use for a bucket in sylivas case
 
S

Sylvia Else

Jan 1, 1970
0
I guess you didn't consider cardboard and packing tape then :)
or a cheap plastic bucket?

The fan is too big for a plastic bucket. I considered cardboard but it
was far from clear to me that it was going to be strong enough without
bracing that would further complicate the task.

This isn't a research project. I was looking for a solution that would
definitely work, and be robust.

Sylvia.
 
S

Sylvia Else

Jan 1, 1970
0
I can think of another use for a bucket in sylivas case

Yes, I can use it to throw-up into whenever I imagine your face.

Sylvia.
 
S

Sylvia Else

Jan 1, 1970
0
Stick the fan outside, blow the air inside. Lateral thinking is absent
in the female of the species.

No worries, though it's 10' above the ground. I'll just cantelever out a
shelf, and a shelter (fan's not waterproof, and weather forecasts are
not sufficiently reliable), get a sparky in to do the weatherproof
electrics (which I could do myself but am not legally permitted to in
this Australian nanny state), and it'll be fine.

Sylvia.
 
S

Sylvia Else

Jan 1, 1970
0
Some of those larger black plastic pot plant containers might be big
enough, also are sturdy,
UV resistant (since used outdoors in a garden).

Cut a piece of plywood to fit the window gap, cut a hole in the ply
suit the diameter
of the pot, (and at the right height to suit the fan) cut the bottom
out of the pot, and screw the pot to the ply.

This might make a big enough, and very strong duct for relatively
little cost. IIRC those pots are sturdy enough
so that they aren't likely to flap around in the wind. You can
probably paint them any colour you like, if you don't like black
colour.

It's an interesting idea. I'll have to look at what size pots are
available (and how much they weigh) next time I'm at the hardware store.

Mind you, plywood doesn't come cheap :(

Sylvia.
 
K

keithr

Jan 1, 1970
0
The application is to suck cool air in through an open window at night.
During the recent heat wave, it was noticeable that even though the
temperature outside drops at night, the temperature of the house doesn't
drop that much. The problem is lack of air flow.

A conventional pedestal fan blows in such a direction that when it's
placed as near as possible to a window, the fan blades are still quite a
way from the cool air, and so the result is not as effective as it might
be. If I could reverse the direction of flow, then I could also turn
then fan around, so that the blades would be much closer to the window.

I considered simply building a duct, but the cost of materials was
excessive.

I'm thinking of using box fans instead.

Sylvia.

Sylvia's house where the fans don't blow, they suck.
 
S

Sylvia Else

Jan 1, 1970
0
You can't get a permit to do your own home wiring in Australia?

Nup. Well, not unless you become a professional electrician, which
requires an apprenticeship, AND pay the annual licence fee.
Pity.
Here in most of Canada - as long as the city (or relevant jurisdiction)
electrical inspector OKs the job (permit required) - then the handy
homeowner is permitted to do their own work - obviously one does it to
the electrical code. I did quite a bit of improvements to my previous
home, the inspector came in, examined a few random spots (opened
sockets, boxes, etc) and like what he saw and signed off on the job. If
he wasn't happy I would have had to open every box to show the job. This
inspection was before I put the wallboard up of course!

Here in Aussieland, you cannot so much as replace a light switch with an
identical model.

You can be on a remote farm, 100s of kilometers from anywhere, and if a
lampholder breaks, you have to call in a sparky.

Sylvia.
 
J

Jasen Betts

Jan 1, 1970
0
It's an interesting idea. I'll have to look at what size pots are
available (and how much they weigh) next time I'm at the hardware store.

Mind you, plywood doesn't come cheap :(

If you want to save money go second-hand. eg: the powdercoated
zinc-alume treated sheet steel front off a dead washing machine
can probably had for a few bucks (if not less) from a scrap-metal
place , recycle market, or appliance repairer.

A demolition yard will probably have used flooring ply "cheap".
19mm (typical flooring thickness) is probably overkill strength-wise
but should fit the winbdow track ok.

Another thing you can do is ask in the wood part of the hardware shop for a
coversheet. Coversheets are the factory soiled sheets of ply (or mdf etc)
that are used to protect the top and bottom sheets in the stack during
shipping. 2.4x1.2m so youll need be prepared to transport something
that big. they will usually be significantly cheaper as they can't be used
for the normal purpose of the product.
 
A

atec77

Jan 1, 1970
0
Curiosity, good! I'd hire you as an apprentice at my pinball shop.


Not sure about 'stalled' here, unless the gearing is designed to not
allow reverse direction I am having trouble understanding the problem here.


(to previous poster) Right, no lateral thinking in the female of the
species? Explain that to Madame Curie, Margaret Thatcher (OK, not a
great example), my daughter (5 year physics and math major), and so on...


You can't get a permit to do your own home wiring in Australia?
Not a chance and with good reason

Pity.
Here in most of Canada - as long as the city (or relevant jurisdiction)
electrical inspector OKs the job (permit required) - then the handy
homeowner is permitted to do their own work - obviously one does it to
the electrical code. I did quite a bit of improvements to my previous
home, the inspector came in, examined a few random spots (opened
sockets, boxes, etc) and like what he saw and signed off on the job. If
he wasn't happy I would have had to open every box to show the job. This
inspection was before I put the wallboard up of course!

We have a system of indentured trades people , we also have 240ac and
415 ac electrical systems and the average home is fused to 120 amps or
more at the fuse box with individual power sockets to 10 amp@ 240v , you
generally only get once mistake at those levels hence the inability to
do your own work
The same with telecommunications equipment you have to use a trady or
suffer huge fines , thanks mainly to a few home installers doing serious
damage to local exchanges over the years
 
F

F Murtz

Jan 1, 1970
0
atec77 said:
Not a chance and with good reason

Pity.

We have a system of indentured trades people , we also have 240ac and
415 ac electrical systems and the average home is fused to 120 amps or
more at the fuse box with individual power sockets to 10 amp@ 240v , you
generally only get once mistake at those levels hence the inability to
do your own work
The same with telecommunications equipment you have to use a trady or
suffer huge fines , thanks mainly to a few home installers doing serious
damage to local exchanges over the years
Work by non trades people is not as dangerous as some people seem to
think.If you take the thousands and thousands of electrical items sold
in supermarkets etc the vast majority of which are installed illegally
by non licensed people and compare statistically the number of incidents
this causes you may realize it is not the problem alarmists may think.
If it were such a problem the powers that be would stop the non licensed
obtaining them.
 
A

atec77

Jan 1, 1970
0
Work by non trades people is not as dangerous as some people seem to
think.If you take the thousands and thousands of electrical items sold
in supermarkets etc the vast majority of which are installed illegally
by non licensed people and compare statistically the number of incidents
this causes you may realize it is not the problem alarmists may think.

One death or injury is to many
and considering some of the incredibly stupid electrical work getting
done I cant agree
If it were such a problem the powers that be would stop the non licensed
obtaining them.
just people driving while disqualified
 
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