---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Mon 03/27/17: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:53 AM - Re: Prop Balancing (cjpilot710@AOL.COM) ________________________________ Message 1 _____________________________________ Time: 10:53:31 AM PST US From: cjpilot710@AOL.COM Subject: Re: Yak-List: Prop Balancing There is a propeller shop in Orlando. In a message dated 3/24/2017 2:40:09 P.M. Eastern Daylight Time, erniel29@gmail.com writes: Thanks Walt, I'll have to find someone local who can static balance my prop. Ernie On Fri, Mar 24, 2017 at 2:26 PM, Walter Lannon <_wlannon@shaw.ca_ (mailto:wlannon@shaw.ca) > wrote: Ernie; Should always be static balanced first. Dynamic balancing is also a very good idea which can correct the aerodynamic effects of discrepancies between blades with regard to spanwis e angle distribution, width, thickness and profile. For al. alloy blades if all of these factors are carefully addressed at overhaul the need for dynamic balancing is greatly reduced and for installations like the CJ there is no spinner back-plate to satisfy the 360 deg. facility for correction. Walt From: _Ernest Martinez_ (mailto:erniel29@gmail.com) Sent: Friday, March 24, 2017 10:39 AM Subject: Re: Yak-List: Prop Balancing Walt, I was referring to Dynamic balancing. But I never considered static balance in both planes. Thanks. Ernie On Fri, Mar 24, 2017 at 1:37 PM Walter Lannon <_wlannon@shaw.ca_ (mailto:wlannon@shaw.ca) > wrote: Ernie; Static propellor balancing is done with a central arbor installed on a precision leveled set of balance ways. Level tolerance is within 0.0005 =9D pet foot of length. Quick summary for J9-G1 prop.-- With blades level add corrective weight to balance ring in any circumferential location. Position blades vertical, move installed weight circumferentially to correct vertical un balance. If, in best location, vertical unbalance still not corrected add additional weight in same circumferential location to BOTH blades. With both horizontal and vertical unbalance corrected the prop. will balance in all positions. Walt From: _Ernest Martinez_ (mailto:erniel29@gmail.com) Sent: Friday, March 24, 2017 8:13 AM yak-list Subject: Re: Yak-List: Prop Balancing Just read my own email, and it's pretty cryptic. I'm referring to where the weights get placed. I'm unsure about how one would determine where ar ound the circumference of the blade shaft one would place the weight. When one balances a wheel theres only one dimension you're dealing with, here ther e are two. Ernie On Fri, Mar 24, 2017 at 11:00 AM, Ernest Martinez <_erniel29@gmail.com_ (mailto:erniel29@gmail.com) > wrote: Does anyone have any detail on balancing the Housai Prop? Let me start of f saying that I have the most rudimentary understanding of how a prop is balanced. It seems that the position on the hub perpendicular to the rota tion axis is pretty arbitrary. Does anyone have a written procedure of any sor t? Ernie (https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_ campaign=sig-email&utm_content=emailclient) Virus-free. _www.avast.com _ (https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_ campaign=sig-em ail&utm_content=emailclient) (https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_ campaign=sig-email&utm_content=emailclient) Virus-free. _www.avast.co m_ (https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_ campaign=sig-e mail&utm_content=emailclient) ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/yak-list Browse Digests http://www.matronics.com/digest/yak-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.