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Not sure what you are saying but fans can mount in any position; theyShould these be mounted with the faces plumb or level? The RS
273-241 4" fan (new unit) that I'm trying to build an air circulator
from seems not to run at constant speed when I test it flat on
the bench.
As I suspected.On 28 Jan 2007 23:01:32 -0800, "Father Haskell"
fatherhask...@yahoo.com> wrote:
Should these be mounted with the faces plumb or level? The RS
273-241 4" fan (new unit) that I'm trying to build an air circulator
from seems not to run at constant speed when I test it flat on
the bench.Not sure what you are saying but fans can mount in any position; they
are usually mounted vertically (Edge down). Bearings on most are
probably happiest that way
Fresh out of the box, solid, clean electrical connection. JustConstant voltage? Constant restriction to air flow? Several fans
running parallel from the same supply may try to "sync" and vary the
speed as they drop in and out of synchronization.
Sitting a fan flat on the bench is not a good test. You are blocking any airOn Jan 29, 4:38 pm, default <defa...@defaulter.net> wrote:
On 28 Jan 2007 23:01:32 -0800, "Father Haskell"
fatherhask...@yahoo.com> wrote:
Should these be mounted with the faces plumb or level? The RS
273-241 4" fan (new unit) that I'm trying to build an air circulator
from seems not to run at constant speed when I test it flat on
the bench.Not sure what you are saying but fans can mount in any
position; they
are usually mounted vertically (Edge down). Bearings on most are
probably happiest that way
As I suspected.
Constant voltage? Constant restriction to air flow? Several fans
running parallel from the same supply may try to "sync" and vary the
speed as they drop in and out of synchronization.
Fresh out of the box, solid, clean electrical connection. Just
sat it on the bench and let it run.
---------------
2 x 2 spacers under the frame set far enough apart not to"Father Haskell" <fatherhask...@yahoo.com> wrote in messagenews:1170120974.799592.234760@a75g2000cwd.googlegroups.com...
On Jan 29, 4:38 pm, default <defa...@defaulter.net> wrote:
On 28 Jan 2007 23:01:32 -0800, "Father Haskell"
fatherhask...@yahoo.com> wrote:
Should these be mounted with the faces plumb or level? The RS
273-241 4" fan (new unit) that I'm trying to build an air circulator
from seems not to run at constant speed when I test it flat on
the bench.Not sure what you are saying but fans can mount in any
position; they
are usually mounted vertically (Edge down). Bearings on most are
probably happiest that way
As I suspected.
Constant voltage? Constant restriction to air flow? Several fans
running parallel from the same supply may try to "sync" and vary the
speed as they drop in and out of synchronization.
Fresh out of the box, solid, clean electrical connection. Just
sat it on the bench and let it run.---------------
Sitting a fan flat on the bench is not a good test. You are blocking any air
flow and a fan, to do anytthing needs to be able to move air.
It may be
having a problem in that much of the time the load on the fan is 0 but as
air leaks in the load can change. If you set it on edge it would be better
as then you have unobstructed air flow. Try it.
NB a fan blowing into a heat sink is not equivalent as the heat sink allows
air flow.
--
Don Kelly d...@shawcross.ca
remove the X to answer
----------------------------- Hide quoted text -- Show quoted text -
How about flipping it 180?2 x 2 spacers under the frame set far enough apart not to
throttle the airstream. Fan RPM was erratic, as if the
fan was designed without thrust bearings.
That blows my idea. How is it in a vertical position?On Jan 29, 9:40 pm, "Don Kelly" <d...@shaw.ca> wrote:
"Father Haskell" <fatherhask...@yahoo.com> wrote in
messagenews:1170120974.799592.234760@a75g2000cwd.googlegroups.com...
On Jan 29, 4:38 pm, default <defa...@defaulter.net> wrote:
On 28 Jan 2007 23:01:32 -0800, "Father Haskell"
fatherhask...@yahoo.com> wrote:
Should these be mounted with the faces plumb or level? The RS
273-241 4" fan (new unit) that I'm trying to build an air circulator
from seems not to run at constant speed when I test it flat on
the bench.Not sure what you are saying but fans can mount in any
position; they
are usually mounted vertically (Edge down). Bearings on most are
probably happiest that way
As I suspected.
Constant voltage? Constant restriction to air flow? Several fans
running parallel from the same supply may try to "sync" and vary the
speed as they drop in and out of synchronization.
Fresh out of the box, solid, clean electrical connection. Just
sat it on the bench and let it run.---------------
Sitting a fan flat on the bench is not a good test. You are blocking any
air
flow and a fan, to do anytthing needs to be able to move air.
2 x 2 spacers under the frame set far enough apart not to
throttle the airstream. Fan RPM was erratic, as if the
fan was designed without thrust bearings.
------------------
Fine. Complicates the circulator's design (tower, corner of"Father Haskell" <fatherhask...@yahoo.com> wrote in message
news:1170131718.550872.61600@h3g2000cwc.googlegroups.com...
On Jan 29, 9:40 pm, "Don Kelly" <d...@shaw.ca> wrote:
"Father Haskell" <fatherhask...@yahoo.com> wrote in
messagenews:1170120974.799592.234760@a75g2000cwd.googlegroups.com...
On Jan 29, 4:38 pm, default <defa...@defaulter.net> wrote:
On 28 Jan 2007 23:01:32 -0800, "Father Haskell"
fatherhask...@yahoo.com> wrote:
Should these be mounted with the faces plumb or level? The RS
273-241 4" fan (new unit) that I'm trying to build an air circulator
from seems not to run at constant speed when I test it flat on
the bench.Not sure what you are saying but fans can mount in any
position; they
are usually mounted vertically (Edge down). Bearings on most are
probably happiest that way
As I suspected.
Constant voltage? Constant restriction to air flow? Several fans
running parallel from the same supply may try to "sync" and vary the
speed as they drop in and out of synchronization.
Fresh out of the box, solid, clean electrical connection. Just
sat it on the bench and let it run.---------------
Sitting a fan flat on the bench is not a good test. You are blocking any
air
flow and a fan, to do anytthing needs to be able to move air.
2 x 2 spacers under the frame set far enough apart not to
throttle the airstream. Fan RPM was erratic, as if the
fan was designed without thrust bearings.
------------------
That blows my idea. How is it in a vertical position?