🚀 go-pugleaf

In article <727805456snz@harrier.demon.co.uk> bob@harrier.demon.co.uk writes:
>
>>Actually, regarding calibrating to an electric light wouldn't that be
>>1800 rpm for a two blade prop or 1200 for a three blader?
>>
>>Also, you would need a fluorescent light or some other light that
>>flickers more than an incandescent light.
>>
>>Just a thought...
>
>>Wrrooonnngggggggg... An incandescant lamp running on 50 Hz mains actually
>flashes 100 times/sec. The sine-wave goes both posative and negative peaks
>in ecah cycle, ie 100 flashes/sec. Multilpy by 60, gives 6000 flashes per
>minute.. So on the two blade setting it should read 300 ( 3000rpm ) and on 
>three blade 200...
>
>I guess your side of the pond where you run at 60Hz it would read 360 and 240.
>
>I'm not an expert on flourescant lights, (or much else really) :-) but they
>run via some really high voltage gizmo which makes the gas in the tube 
>flouresce constantly....

Hmmm

I think this is backwards. The filament of an incandescent lamp 
doesn't have enough time to cool down enough between cycles, so
it should glow steadily. A fluorescent lamp, however, relies on
the flow of electrons through a mercury vapor through the tube,
and this can respond faster to the cycles of AC. 

Whether they flash 60x per second or 120x per second I don't know.



-- 
-------------------------------------------------------------------------------
Iskandar Taib                          | The only thing worse than Peach ala
Internet: NTAIB@SILVER.UCS.INDIANA.EDU |    Frog is Frog ala Peach
Bitnet:   NTAIB@IUBACS                 !