If interested in the challenges involved, check out
http://www.awatson1.fsnet.co.uk/ for R/C project for a VTOL X-35
model...

--Thomas

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Kieren Johnstone
> Sent: Sunday, July 14, 2002 11:38 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [EE]: Fans for lifting (flying)
>
>
> Hi,
>
> I want to find out the best way (using fans) to lift my project (quite
> light, just the weight of the fans, a smallish PCB).
> Tiltmeters would be
> added, and the PIC would provide stability (with tiltmeters?)- but my
> problem at the moment is determining which fan to use -
> 5,12,24VDC?  What
> sort of CFM (cubic feet/minute) would I need (there would be
> say 4 fans, one
> in each corner)?  What would be the best battery supply,
> rechargable NiCd?
> How could a PIC vary the supplied voltage (current?) to the
> fans to change
> the speed?  Or should I just use a relay (the fans would run
> off their own
> power supply, I assume).
>
> Thanks..any help apprecited
>
> -Kieren
>
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