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Registered Member #106
Joined: Thu Feb 09 2006, 09:39PM
Location: Portland, OR and Istanbul, Turkey
Posts: 47
I am trying to design some basic diagrams and outlines for an idea I want to try. IT involves a leaf blower. For the life of me and all the Google searching I have done, nowhere it seems can I find a darn leaf blower diagram, schematic, or even basic dimensions. All I really want to find is the impeller drawing, size and perhaps the blade count and if they are curved or straight blades.
Does anyone have some good pictures or links to something? I really am at a loss. Short of buying a leaf blower and ripping it apart. I will be going back to the U.S. on Monday for 3 weeks and I would at least like to have some rough idea of what I will be having to design around.
Registered Member #106
Joined: Thu Feb 09 2006, 09:39PM
Location: Portland, OR and Istanbul, Turkey
Posts: 47
See you are perfect for this. I was sort of hoping you might answer. I want to build a circular wing around the outside of the spinning edge of the blower to see how much lift I would get.
Registered Member #49
Joined: Thu Feb 09 2006, 04:05AM
Location: Bigass Pile of Penguins
Posts: 362
interesting, could be neat, although you still have the torque issue to deal with. look up the 'channelwing' concept and try not to be swayed by the pseudoscience; its a similar 'move the air, not the wing' idea
leaf blowers will be hit or miss, so you're going to have to poke around. most seem to have a rotor that falls in between squirrel cage and centrifugal, that is, the blades extend in the radial direction, but not all the way to or from the center.
Registered Member #106
Joined: Thu Feb 09 2006, 09:39PM
Location: Portland, OR and Istanbul, Turkey
Posts: 47
Huh. The Channelwing. That was interesting. But I really think it is the speed of the air, not the speed of the wing.
Well, I have been drawing up my plans in AutoCad, so when I get home tonight in about 6 hours, I will try to finish them up and post them so you can see what I'm looking at. Maybe give me some critisizm. Thanks. :)
Registered Member #106
Joined: Thu Feb 09 2006, 09:39PM
Location: Portland, OR and Istanbul, Turkey
Posts: 47
Here is the pic I promised.
I will try to give a 3D exploded and combined view later. What you can see is that I wil take apart the leaf blower leaving the motor and the impeller attached. I will fabricate a stator of some sort to direct the air over the wing section. The wing will be fashioned out of probably plexiglass and formed using my oven at low temperatures. I might even decide to build a vacuum forming machine.
The motor will turn the impeller, push the air out the periphery, through the stator and over the wing. Hopefully this will have a measurable amount of lift. I am not anticipating anything really exciting, just a proof of concept idea. I don't think that a 2,000 watt leaf blower will lift itself off the table into flight, but fun none the less.
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Well, Custer claimed between 8 and 13lb of lift per horsepower, and 2000w is just under 3hp. Even if the motor was only 60% efficient and you were towards the 8lb end, it should come close to lifting itself.
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Leaf Blower and Impeller questions
