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wpowokal

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TDM blades
« on: January 11, 2004, 10:05:00 PM »
I recently made some steel blades for my tape drive motors, that work quite well.


The base material is 1.5mm sheet galv. I cut 3 pieces 840mm (34")long, just because thats how long the piece was, 100mm wide at base and 50mm wide at tip.

 At the edge which is at right angles to the base (leading edge) I measure down 20mm at tip end and 40mm at base end, scribe a line between both and bend along this line to a 25 degree angle approximatly.


I mount the broard part onto a fan hub (off a CAT)the angle of which is aroung 5 deg, but this is what I fine tune for required speed.


 In my experience these motors are 25 rpm/volt, so charging my 12v system the best I have seen so far is around 8 amps. Having said that our best winds at this time of year are overnight and Allan is usually making zzzzzzz then.


A very un-high tech but works starts with a nats fart and spins up quickly, so heres the pics,

 



« Last Edit: January 11, 2004, 10:05:00 PM by (unknown) »
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Jon Miller

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Re: TDM blades
« Reply #1 on: January 17, 2004, 07:05:32 AM »
could you put some more pics of those blades on here as they look easy, simple and fast to build.


Thanks Jonathan Miller

« Last Edit: January 17, 2004, 07:05:32 AM by Jon Miller »
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joelcox2007

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Re: TDM blades
« Reply #2 on: January 17, 2004, 12:20:57 PM »
What is the rating on your motor on these blades? I have decided to build one with a motor but can't decide what blades to use. I think I will probabaly use these.
Thanks
« Last Edit: January 17, 2004, 12:20:57 PM by joelcox2007 »
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wpowokal

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Re: TDM blades
« Reply #3 on: January 19, 2004, 06:44:37 AM »
Joel,

     I have used a 4 brush motor, they have no lable rating but I rate them by amps, 12v@20amps 240 watts. I concider that max.


regards Allan    

« Last Edit: January 19, 2004, 06:44:37 AM by wpowokal »
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wpowokal

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Re: TDM blades
« Reply #4 on: January 19, 2004, 06:56:27 AM »
Jonathan, While I am not sure what more you need me to show I have the following pics. If these don't answer your questions, either post them here or 'e' mail me wpowokal@bigpond.com.au.

rem 25mm = 1" near enough.


« Last Edit: January 19, 2004, 06:56:27 AM by wpowokal »
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Norm

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Re: TDM blades
« Reply #5 on: January 25, 2004, 02:31:29 PM »
   Hmmm....should be able to make about a dozen blades from a

clothes dryer cabinet ( :>) Norm.
« Last Edit: January 25, 2004, 02:31:29 PM by Norm »
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