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Ernie
Joined: 11 Jan 2006
Posts: 513
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 Posted: Fri Mar 24, 2017 7:03 am Post subject: Prop Balancing |
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Does anyone have any detail on balancing the Housai Prop? Let me start off 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 rotation axis is pretty arbitrary. Does anyone have a written procedure of any sort?
Ernie
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Ernie
Joined: 11 Jan 2006
Posts: 513
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| Posted: Fri Mar 24, 2017 7:15 am Post subject: Prop Balancing |
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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 around 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 there are two.
Ernie
On Fri, Mar 24, 2017 at 11:00 AM, Ernest Martinez <erniel29(at)gmail.com (erniel29(at)gmail.com)> wrote:
| Quote: | Does anyone have any detail on balancing the Housai Prop? Let me start off 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 rotation axis is pretty arbitrary. Does anyone have a written procedure of any sort?
Ernie
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wlannon(at)shaw.ca
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| Posted: Fri Mar 24, 2017 9:33 am Post subject: Prop Balancing |
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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” 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 unbalance. 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 (erniel29(at)gmail.com)
Sent: Friday, March 24, 2017 8:13 AM
To: yak-list (yak-list(at)matronics.com)
Subject: Re: 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 around 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 there are two.
Ernie
On Fri, Mar 24, 2017 at 11:00 AM, Ernest Martinez <erniel29(at)gmail.com (erniel29(at)gmail.com)> wrote:
| Quote: | Does anyone have any detail on balancing the Housai Prop? Let me start off 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 rotation axis is pretty arbitrary. Does anyone have a written procedure of any sort?
Ernie
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http://www.matronics.com/Navigator?Yak-List |
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Ernie
Joined: 11 Jan 2006
Posts: 513
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| Posted: Fri Mar 24, 2017 9:42 am Post subject: Prop Balancing |
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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(at)shaw.ca (wlannon(at)shaw.ca)> wrote:
| Quote: | 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” 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 unbalance. 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 (erniel29(at)gmail.com)
Sent: Friday, March 24, 2017 8:13 AM
To: yak-list (yak-list(at)matronics.com)
Subject: Re: 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 around 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 there are two.
Ernie
On Fri, Mar 24, 2017 at 11:00 AM, Ernest Martinez <erniel29(at)gmail.com (erniel29(at)gmail.com)> wrote: | Quote: | Does anyone have any detail on balancing the Housai Prop? Let me start off 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 rotation axis is pretty arbitrary. Does anyone have a written procedure of any sort?
Ernie
|
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| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
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wlannon(at)shaw.ca
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| Posted: Fri Mar 24, 2017 10:29 am Post subject: Prop Balancing |
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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 spanwise 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 (erniel29(at)gmail.com)
Sent: Friday, March 24, 2017 10:39 AM
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Re: 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(at)shaw.ca (wlannon(at)shaw.ca)> wrote:
| Quote: | 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” 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 unbalance. 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 (erniel29(at)gmail.com)
Sent: Friday, March 24, 2017 8:13 AM
To: yak-list (yak-list(at)matronics.com)
Subject: Re: 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 around 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 there are two.
Ernie
On Fri, Mar 24, 2017 at 11:00 AM, Ernest Martinez <erniel29(at)gmail.com (erniel29(at)gmail.com)> wrote: | Quote: | Does anyone have any detail on balancing the Housai Prop? Let me start off 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 rotation axis is pretty arbitrary. Does anyone have a written procedure of any sort?
Ernie
|
Virus-free. www.avast.com
|
Virus-free. www.avast.com
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
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Ernie
Joined: 11 Jan 2006
Posts: 513
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| Posted: Fri Mar 24, 2017 10:39 am Post subject: Prop Balancing |
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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(at)shaw.ca (wlannon(at)shaw.ca)> wrote:
| Quote: | 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 spanwise 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 (erniel29(at)gmail.com)
Sent: Friday, March 24, 2017 10:39 AM
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Re: 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(at)shaw.ca (wlannon(at)shaw.ca)> wrote:
| Quote: | 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” 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 unbalance. 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 (erniel29(at)gmail.com)
Sent: Friday, March 24, 2017 8:13 AM
yak-list
[b]Subject: Re: 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 around 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 there are two.
Ernie
On Fri, Mar 24, 2017 at 11:00 AM, Ernest Martinez <erniel29(at)gmail.com (erniel29(at)gmail.com)> wrote: | Quote: | Does anyone have any detail on balancing the Housai Prop? Let me start off 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 rotation axis is pretty arbitrary. Does anyone have a written procedure of any sort?
Ernie
|
Virus-free. www.avast.com
|
Virus-free. www.avast.com
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| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
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cjpilot710(at)AOL.COM
Guest
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| Posted: Mon Mar 27, 2017 9:53 am Post subject: Prop Balancing |
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There is a propeller shop in Orlando.
In a message dated 3/24/2017 2:40:09 P.M. Eastern Daylight Time, erniel29(at)gmail.com writes:
| Quote: | 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(at)shaw.ca (wlannon(at)shaw.ca)> wrote:
| Quote: | 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 spanwise 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 (erniel29(at)gmail.com)
Sent: Friday, March 24, 2017 10:39 AM
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Re: 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(at)shaw.ca (wlannon(at)shaw.ca)> wrote:
| Quote: | 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” 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 unbalance. 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 (erniel29(at)gmail.com)
Sent: Friday, March 24, 2017 8:13 AM
yak-list
[b]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 around 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 there are two.
Ernie
On Fri, Mar 24, 2017 at 11:00 AM, Ernest Martinez <erniel29(at)gmail.com (erniel29(at)gmail.com)> wrote: | Quote: | Does anyone have any detail on balancing the Housai Prop? Let me start off 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 rotation axis is pretty arbitrary. Does anyone have a written procedure of any sort?
Ernie
|
Virus-free. www.avast.com
|
Virus-free. www.avast.com
|
[/b]
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| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
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