hornet blades got about 800 watts 35 mph

[Geek]

Will since a recent wind storm caused the tail to slip and then come off completely I order a new set of hornet blades with a 6 blade hub these are a much better match for my alt than the jerry blades were I maxed out at 100 watts now with the new blades I got a high of around 800 watts I did louse some lowend start it takes 10 mph to get it started where the jreeys would start around 6.

at one point we were runing a shop vac stright off the alt it raan real nice it was a 7 amp motor I am not sure if it was quite flat out but it was in the 90s volatage wise.

just goes to show the guys the are always saying match your alt to your blades.

I should have it up on the tower next week this was all on hte road test.

Geek

[Jerry]

Hi Geek Bravo good job.

Let me ask a few questions.

You said you maxed out at 100 watts with the Jerry blades.

What are you using as your alt? How many Jerry blades? What diameter prop tip to tip.

Are the jerry blades pitched at 23 degrees at the root?

Here is an entry in my wind test log book. This is from the S-10 wind test truck.

4-24-03, 8:00 pm, 50 degrees cloudy, 3/4 hp 6 pole furnace blower motor with 6 # 29 neo magnets, 6 starts windings perelell, 6 run windings perelell, 2 bridge diodes,

Prop 3 jerry blades with Mike mods, 23 degrees root, 49 inches, 35 mph, 50 amps 15.1 volts = 755 watts.

This is alittle behind the Hornets but low speed start up and total power colected  at low wind was greter than the Hornets. The noise of the Hornets was also not acceptable.

The most I've seen from the Hornets is 80 amps The most I've seen from the Jerry blades so far is 80 amps.

I think there are more low wind days than high wind days. If you watch the gennys on my shop roof most days the Jerry blades are spinning and the Hornets are not.

Here is another test Nov. 24, 03

1 hp Garbogen      12 volt test. 3 Jerry/Mike mod blades          6 Hornet blades

     5 mph                              3 amps                         0 amps

     10 mph                             8 amps                         2 amps

     15 mph                            15 amps                         5 amps

I'll agree the Hornets have higher output at the higher wind speeds but not by much. The Hornets did 80 amps at 40 mph but the Jerry blades did 80 amps at 45 mph not far behind but in either case it was storm type wind speed and not the normal every day 5 to 15 mph wind. I own and use Hornets but in average normall every day wind these do not collect as much power.

So as you can see I'm very curius about how your Jerry blades are configured?

Thanks for some specs and info on your system.

                             JK TAS Jerry

[Geek]

I had the jerry's in a four blade turbine unmodifyed (no mike modes)

they were piched so the tips of the blades were near flat

the hub had about abouut a 12 in dim.

I thnk the problen was with my alt it really dosent start making good power till it is spinning real fast about 800 rpm (just a guess I don't have a tach)

I really do like the Jerry's but the high speed of the hornets agreed with my alt much better.

The allt way made by putting 8 #29 mags in a 1 HP 3 phase motor with the 3 phases wired in series (I still trying to sort the wiring because even with out a scope I can tell I'm not getting a very smooth output) I have tried to use the Y or delta that every one has talked about but I can't seem to make it work.

this was my first real atempt so I'm pretty happy but I think there is still room to squees a few more watts out of this one.

I really didn't hear much noise from the hornets at 35 or 40 I only wish I had a tach hooked up so I could be more helpful.

Geek

[Jerry]

Hi Geek

Like you I am RPM chalagned. Its just a mater of time though. Eventually i will have some rpm data on the plastic blades.

I do know the Mike mods make a drastic diferance in rpm. I won't fly the plastic blades without Mike mods.

The closest thing to an rpm gestamate I have is from a small dc motor I'm fling as a genny.

With this pm motor chucked up in the lathe 50 volts is reached at 500 rpm no load.

We recently had a storm and were seeing winds in the up to 35 to 40 mph range. I was seeing 125 to 150 volts from this motor no load. This motor is a 115 volt motor. It rated 1800 rpm.

I would guess the rpm to be around 1500 or so? Of course this was no load but the blades have developed 80 amps at 15 volts for 1200 watts wich is about 1.5 hp?

I was thinking of using a car type tachometer on the 80 amp GARBOGEN to get an rpm reading in the wind loaded.

Time will tell.              JK TAS Jerry

[desertratjack]

I'm using hornet 6 blade setups. How to stop the NOISE? Guess I'll have to furl them with "tip-backs" just when they are really getting going. Windseeker 503 (3 blade- rated at 500w) generally outperforms the hornets until just about the point that the hornets make noise. Very sad as the hornets cost about 1/4 of the windseeker.

[Geek]

I think it is a matter of how hight the rpm are. I think my alt is a lower rpm than yours. I think that is why I'm not getting much noise out of these blades. You could try and round the tips I think that might make some difference but then again it may just muck things up too.

Sorry I can't help you more.

Geek

[desertratjack]

I have the 6V and 12V hornet windmills. They both create the same noise around the same windspeed. I bought the 6V one because I thought it would drag the prop down below the noise speed. No luck. I wet sand the 6 blade hornet blades to 400 grit. Maybe the hornet blade tips deform at higher loads to make noise?

Please let me know is you notice any hints on how this noise problem.

Jack

[Jerry]

Hi Jack

I sent you an e-mail this morning to the address you said to use but AOL said it didn't go through. Do you have an e-mail address that works?

                           JK TAS Jerry

[desertratjack]

I'm not on AOL.      jacknl7s@hotmail.com

[Jerry]

Yep Thats the address I sent it to as you sugjested but it didn't work.

Sorry. JK TAS Jerry                    

 

[desertratjack]

send it again

jacknl7s@hotmail.com