The FAN is the original ALPHA ALL I am trying to do is REPLACE the MOTOR
that TURNS the BLADE. In this case a squirrel fan arrangement blower ....
The NEW motor shaft fits good, shaft length is good.
The unavailabality to get this information on a replacemnet motor
befuddles me... WHY THE BIG SECRET???????????????
If ALPHA can not PROVIDE/SELL me the MOTOR why hide the SPECS
so I can replace it. It's like I am the only ONE NEEDING of these motors.
YET ALPHA is aware of the need as they are trying to get them.
BUT as of last word the BATCH that came in DOES NOT SUIT there
quality..... I don't want to be pushy and call and ask for a AMP god...
all I want is a little common courtsy and customer service help.
I guess all I can do is buy 3-4 $30 dollar motors and RUN them in the 91b
and see what happens... ONE AT A TIME.
QUESTION? If you were to guess WHAT RPM would be the best bet.
I make the final decsion based on all responces and experiences of
searching and tests.
BUT as a NOVICE non engineer type.. just a technician bee..... this all
I can do
to try and reslove this problem.
I think ALPHA isn't going to tell me the excact information.
If you know someone there I can speak too please tell me.
Bill Turner wrote:
> ORIGINAL MESSAGE:
>
> At 06:47 PM 5/23/2006, KR4DA wrote:
>
>> I recieved the fan today.
>> BUT the SPECS on the label say RPM 1100 and HP 1/500
>>
>> The web page says RPM 3000 and HP 1/200
>
>
> *********** REPLY SEPARATOR ***********
>
> RPMs are only part of the issue. The geometry of the fan is also
> important, especially the angle of the blades as they cut through the
> air. Low RPMs should have a high blade angle and vice versa.
>
> The best way to ensure correct cooling is to measure the tube
> temperature directly when running under full load. Use either a
> non-contact thermometer (my choice) or color-changing paint or crayon.
> Compare the reading with the tube manufacturer's specs and you'll have
> your answer without worrying about RPM, pressure difference, etc, etc.
> Tube temperature is the only thing that matters. All those other
> measurements are just a way of getting you there.
--
Bob
Vmoa chat list -> http://autos.groups.yahoo.com/group/vmoachat/
Vmoa tech list home -> http://autos.groups.yahoo.com/group/vmoatech/
Middleburg Fl (South Jacksonville)
ICQ 13912841
Web Page http://bellsouthpwp.net/k/r/kr4da
Visit the FDXPG at http://www.geocities.com/w4wx1/
Ham Radio Calls: KR4DA FG/KR4DA J79DA HK0/KR4DA
Motorcycles CBMMA #4
1977 XS750D 1J7008405
1997 Vmax12J VMOA #504
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