flyrotary@lancaironline.net Mailing List Archive

I'm sorry if this is a dumb question, but would this be considered a supercharger, since it's being driven by the engine all of the time? Are there supercharger or turbocharger impellers that would be large enough? And finally, would a laser-glue thingamabob (I CANNOT think of the name for the laserjet like parts 'printers') be able to make a part to withstand the stress? If not on its own, could it be used to make a mold or to be coated with something stronger? Mike -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ernest Christley Sent: Friday, May 20, 2011 2:25 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Blower experiment: FAIL I doubt any amount of balancing would have kept the blower together. The highest RPM I hit was aroun 4000. Most of the rivets were sheared cleanly. My design was simply not anywhere close to robust enough. I've got a line on a company that will do one-off dynamic balancing in North Carolina. Do you think I could convince you to mill me a rotor, and then I could get my whole assembly balanced? H & J Johnson wrote: > Ernest, did you get a high speed dynamic balance on your blower? I've > built blowers of a similar form and had good results, but only after > balancing to rated RPM. > > Jarrett Johnson > www.innovention-tech.com > > > ---------------------------------------------------------------------- > -- > > Some of you may recall my blower experiment. Using the shaft between > the flywheel and PSRU to drive a centrifugal fan to charge the intake. > > My implementation died in the crib. before.jpg shows what it looked > like a week ago. after.jpg is what was left of it after the few > minutes I was able to get the engine to run. Well, that wasn't all > that was left over. intake.jpg shows how the blades got thrown toward > the intake and smashed up against the air filter. > > Oh, well. Until I can design and build or have built an impeller that > can handle 8000RPM, I'm going to table this experiment. I still think > it is a good idea. So did these guys: > > http://www.flightglobal.com/pdfarchive/view/1942/1942%20-%200142.html > > Furthermore, the calculator at > http://www.forestryforum.com/members/donp/Blowercalc.htm indicates > that with the 10.4" diameter, 3.35" deep area available for me to put > a blower, I should be able to generate 17" water column pressure. > > ---------------------------------------------------------------------- > -- > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html > > ---------------------------------------------------------------------- > -- > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html > -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html