Why not use bow thruster propellers, they are made to fit into a pipe. Jet ski impellers are very high speed as far as i know.
Regards, Ola Sweden >From: "chilechinadollz" <[EMAIL PROTECTED]> >Reply-To: [email protected] >To: [email protected] >Subject: [microhydro] boat propellers vs jet ski impellers >Date: Sun, 11 Sep 2005 16:27:41 -0000 > >I started out looking at boat propellers as a low cost approach for a >propeller turbine. They are attractive from a cost standpoint, >however it appears that they will require some machining to work >efficiently in a housing. This is not a major obstacle, but a more >attractive solution may exist. Jet ski impellers are also readily >available and are already machined to fit within a housing. A wide >variety of pitches are available. > >Does anyone know if there is anything inherent in their design that >makes them unsuitable for turbine use? One thing I have noticed is >that there is more blade overlap. Also the root of the blade does not >appear to have a steeper pitch than the tip, although this is only >from looking at photos and may be a misinterpretation. There are >variable pitch impellers and I assume this refers to the root area vs >tip area. Is there anyone with experience in this area? > >Thanks kindly for any info. >Martin > > > > > > > >Does your company feature in the microhydro business directory at >http://microhydropower.net/directory ? If not, please register free of >charge and be exposed to the microhydro community world wide! > >NOTE: The advertisements in this email are added by Yahoogroups who >provides us with free email group services. The microhydro-group does not >endorse products or support the advertisements in any way. > >More information on micro hydropower at http://microhydropower.net > >To unsubscribe: send empty message to >[EMAIL PROTECTED] >Yahoo! Groups Links > > > > > > ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/FGYolB/TM --------------------------------------------------------------------~-> Does your company feature in the microhydro business directory at http://microhydropower.net/directory ? If not, please register free of charge and be exposed to the microhydro community world wide! NOTE: The advertisements in this email are added by Yahoogroups who provides us with free email group services. The microhydro-group does not endorse products or support the advertisements in any way. More information on micro hydropower at http://microhydropower.net To unsubscribe: send empty message to [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/microhydro/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
