Plastic blade asembly.

[Jerry]

If all goes well heres a piture sequence of plastic blade construction.

The first is a very simple triangle block of plywood. Note on this one there is no aluminum sheet metal support. Although if your in a high wind area it is a good idea.

I start with two heat pump blade asemblies for the metal hub system.



Next drill out the rivets and remove aluminum blades.





Next I'm marking blade support useing the plastic blade as a guide.



Next useing the first cut support as template for the rest of the supports.



Support resting on blade.



All these parts plus screws and washer and blades go into making one 4 blade prop.



Starting assembly of blade.



Finished blade.



Blade on finished genny.

                     JK TAS Jerry

[Jerry]

The procedure is the same for the 3 blade. There are 2 ways to use the metal hubs. You can use one hub on the outside of the supports. This make a space of about 5/8" between the hubs and requires 2 hub to shaft adaptors and a longer shaft lingth but its very strong this way.

The blade is pictured with both metal hubs resting together. This has worked fine in wind of 60 mph no problem but in a high wind area I'd go the stronger rout.

The hub to shaft adaptors come in the following shaft sizes 1/4", 5/16", 3/8", 1/2", 5/8" and 3/4". If you have a metric shaft just pic a smaller size and drill it out.

These blades have done 63 watts at 5 mph, 1200 watts at 45 mph and survive 80 mph storms.

                                 JK TAS Jerry

[richhagen]

I have a couple of dc permanent magnet motors around, I've been meaning to give this a try.  Like most things on my to do list it'll probably be a while before I actually get it done though.  Rich Hagen

[ghurd]

What diameter PVC are you using for the standard Jerry Blades?

G-

[Jerry]

Hi Ghrud.

These are purpuse built blades. They are not cut from pipe or barrells.

They're molded for for the end use. They are unique with a thicker root that has a slight shallow in the center. They have a cup and a twist and are thiner at the tip.

The cup and twist translate into linier stringth. They are very eficient for there size.

They are purpus built.

                         JK TAS Jerry

[ghurd]

OK.  Wow.  I thought they were just pipe!

Can't imagine you break even for what you charge.

G-

[nothing to lose]

Yes the Jerry blades are a fair price and from what I've seen in various posts of the blades and heard from people using them they do sound and look to be very good ones. Strong and hold up well in use as well as being of a good design.

I should have ordered mine way early this year, but things keep comming up and I am not the type that writes many checks. So by the time I find the checkbook something has my time or I am going away etc.. and by the time I get ready again I lost the checkboook. Honestly that's the only reason I haven't order'd mine yet. I think I wrote 2 checks if that many all year this year and no plans to write any more for the rest of the year

Unless I mail one out around the 28th so I get blades around the 10th or near

For now I am trying the pipes, I had some 4" laying around extra. Also cutting up barrels to play with. I expect the Jerries to be far better though.

[gumshine]

i've got 5' of 4" pvc, but don't know how to cut it.  Do I follow the pattern that wooferhound sets out so nicely, or is there a different way to cut them so they are one blade at a time?

Sorry if this is an idiotic question, but I am mechanically challenged and have two left thumbs.  

gums

[Jerry]

Hi Gums.

Nuthin wrong with questions. I ask a bunch myself from time to time.

However I'm sorry I can't help you on plastic pipe blade cuttin. I've never done that yey.

My blades are made in a mold. They are purpus built. Someday I'll try that plastic pipe blade cuttin thing though.

                          JK TAS Jerry