| T O P I C R E V I E W |
| EasternShoreVA |
Posted - 27/12/2007 : 01:30:32
Will a round hub hinder the performance of the DIY 4' Diameter Blades? I have installed a set of 4' DIY blades on my Ametek 30 Generator. We have had some pretty good winds (20mph+) the last couple of days and the Generator seems like it does not want to get past a certain rpm. Everything is balanced and is very smooth. All I can get is 9v burst out of it with no load. I have tried 2 Ameteks and both perform the same.
I had previously a set of 6' PVC blades on and got +15v in a 15 mph wind. I had to get rid of the 6’ blades because they had a lot of flex and were unsafe. And was thinking the smaller blades would give more Voltage because of the higher RPM.
I think the round hub that I am using is restricting the airflow somehow. Any help would be much appreciated.
Thanks!
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| 4 L A T E S T R E P L I E S (Newest First) |
| EasternShoreVA |
Posted - 29/12/2007 : 23:55:52
Yes, I meant Diameter. Today I made a hub like Ben showed in his plans and so far it seems to be doing a bit better. But not much wind right now to tell for sure. Ill let ya know! |
| gotwind |
Posted - 29/12/2007 : 17:01:29
This is a bit confusing EasternShoreVA
I assume you are referring to blade length?, if so try a 2 ft blade length i.e 4 ft diameter as the rest of us do.
Ben.
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| Del |
Posted - 29/12/2007 : 16:49:32
Four foot blades on an Ametek! That's an eight foot blade diameter. Now I know everything is bigger in the USA, but I think you've supersized your turbine beyond what is required for the little Ametek.
Try a slightly more conservatvive approach and reduce your blades to a couple of feet in length.
How big is your hub?
I'd love to see a picture of your 4' blades on your Ametek.
Cheers
Del. |
| speo |
Posted - 27/12/2007 : 03:44:10
I think the hub and the part of the blades closer to the root, should not influence so much the rotor's performance.
Speo
www.windpulse.com |
