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1. 10:53 AM - Re: Prop Balancing (cjpilot710@AOL.COM)
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| Subject: | Re: 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
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