Posted for "Kent" <kent@tulsaconnect.com>:
I wonder
which brand of equipment was used?
Interesting the manual cites tolerance much tighter than industry
standard.
Do people have any idea or appreciate how much weight difference or change in
location affects the balance
reading?
Is that reading a raw value or averaged value?
An AN960-10 washer weighs one
gram. I don't recall what the Walter
spinner's diameter is but it is a large one, about 14-15 inches I
think.
Kent Felkins
Tulsa Oklahoma
[Spinner diameter on a V508 is about 18.5". And
Brian's absolutely correct... balance that prop down to .01 or .02 IPS and there's no detectable vibration at normal operating speeds. Here at
DIemech we use custom made lightweight fasteners for the extra light weights... typical AN hardward can't get you below about 3-4 grams, and that's a
real problem when getting down to the fine tuning. Ain't technology grand. <Marv> ]
-----
Original Message ----- From: "Brian Alley" <n320wt@yahoo.com>
To: <lml@lancaironline.net>
Sent: Thursday, February 17,
2011 7:04 AM
Subject: [LML] Prop Balance
> Working on David Weinsweigs IVPT this evening with a dynamic prop
balancer we
>found the initial readings to be .22 ips (inches per second) at 1900 rpm.
>After several engine runs and weight placement
we were able to achieve
>multiple readings of .01 and .02 ips at 1900 rpm. The manual says anything
>under .05 ips is acceptable. The
Walter 601EX with Avia prop is a very smooth
>installation but with the prop properly balanced it should be like an electric
>motor. If
anyone is interested in this service, please feel free to contact me
>by phone or email.
>
> BRIAN ALLEY (N320WT)
> CARBON
FIBER COMPOSITES
> 101 Caroline Circle
> Hurricane, WV 25526
> www.carbonfibercomposites.net
> 304-562-6800 home
>
304-395-4932 cell
>
> How are you going to win by a nose if you don't stick out your neck?
>
> --
> For archives and
unsub http://mail.lancaironline.net:81/lists/lml/List.html
>
>
> -----
> No virus found in this message.
> Checked by
AVG - www.avg.com
> Version: 10.0.1204 / Virus Database: 1435/3449 - Release Date: 02/17/11
>
|