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Go Back   VAF Forums > RV Firewall Forward Section > Propellers
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  #11  
Old 02-01-2019, 01:24 PM
jask jask is offline
 
Join Date: Feb 2018
Location: Ramona, CA
Posts: 291
Default

Quote:
Originally Posted by GLHRV7A View Post
Is anyone familiar with Dynamic Solutions Systems Inc. Personal MicroBalancer PN 1155-2? I'm troubled by process of getting from polar chart to reality.
Contact me at glhrv7@yahoo.com. thanks
They should probably explain the process in an operating manual but I looked at their website and they have no download. To calculate the weight from the polar chart, use the standard formula of ((hp/10) + 30))* IPS. Multiply that by the distance from crank center to sensor/distance from crank center to the location of the weight. Tradition is that the polar charts give the location of the heavy spot so you need the add the weight 180 degs. Standing in front of the prop, the weight location is measured CCW from the sensor tape location.
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RV-7 builder Ramona, CA.
Free prop balancing for Vanís owners.
RV-6A N665CM
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  #12  
Old 02-20-2019, 08:03 PM
jask jask is offline
 
Join Date: Feb 2018
Location: Ramona, CA
Posts: 291
Default Prop balancing

This Saturday will be the last opportunity for a courtesy prop balance for an indefinite period of time. Jim
__________________
RV-7 builder Ramona, CA.
Free prop balancing for Vanís owners.
RV-6A N665CM
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  #13  
Old 02-20-2019, 08:33 PM
Patr Patr is offline
 
Join Date: Sep 2007
Location: Poway CA
Posts: 12
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Hi Jim
I would like to take you up on your prop balance offer. I'm available this Saturday and based at Chuck Hall.
Call or text

Pat
858-922-8056
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Pat Ryan
RV6A
Ramona CA
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  #14  
Old 02-22-2019, 12:43 PM
cguarino cguarino is offline
 
Join Date: May 2005
Posts: 386
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Quote:
Originally Posted by jask View Post
I am doing free balancing of props for fellow RV owners at KRNM. Ramona, CA. Last one was typical, .31 ips initial to .04 in three runs. I even provide free AN hardware for the weights. Can't beat that deal. Nice to make friends on the forum. Owner removes cowl and takes readings. I set up sensors and tell you where the weights go. In the process, you learn exactly how to best use the dynavibe and learn how I do split weight calculations. Jim
Are you using my wife's spreadsheet? How's it working for you?
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Charlie "T.Bear" Guarino
Springtown, TX
RV-4 Flying again with a fresh overhaul
Exempt but paid
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  #15  
Old 11-29-2022, 01:37 PM
toddespn toddespn is offline
 
Join Date: Mar 2009
Location: columbus,OH
Posts: 36
Default prop balancing formula

Quote:
Originally Posted by jask View Post
They should probably explain the process in an operating manual but I looked at their website and they have no download. To calculate the weight from the polar chart, use the standard formula of ((hp/10) + 30))* IPS. Multiply that by the distance from crank center to sensor/distance from crank center to the location of the weight. Tradition is that the polar charts give the location of the heavy spot so you need the add the weight 180 degs. Standing in front of the prop, the weight location is measured CCW from the sensor tape location.
Jask - Thank you for the formula. Is the result produced in grams? I just did my first attempt (without any formula) by making additional adjustments based on measured change resulting from my initial adjustment. It was tedious but seems to have worked out OK. (.04) It would have been great to have this formula prior to starting the process. Thanks
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Todd Espenschied
- RV10 bought flying Sep 2019
- Flight Design CTLS flown 850 hrs & sold Jan 2020
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  #16  
Old 11-29-2022, 03:01 PM
Northernliving Northernliving is offline
 
Join Date: May 2005
Location: Boston, MA
Posts: 698
Default

Quote:
Originally Posted by jask View Post
I am doing free balancing of props for fellow RV owners at KRNM. Ramona, CA. Last one was typical, .31 ips initial to .04 in three runs. I even provide free AN hardware for the weights. Can't beat that deal. Nice to make friends on the forum. Owner removes cowl and takes readings. I set up sensors and tell you where the weights go. In the process, you learn exactly how to best use the dynavibe and learn how I do split weight calculations. Jim
We have had a few prop-balancing parties in the Boston area. They are never a disappointment and for those who haven't done the balancing act, you won't be disappointed. Almost like flying behind a turbine afterward.
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Brian J.
Boston, MA
RV8 Based at ORH - Purchased
New Superior IO-360-B1AC2 w/Hartzell Composite CS
RV8 - #83313 - Under Construction (sort of!)
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  #17  
Old 11-29-2022, 04:59 PM
jask jask is offline
 
Join Date: Feb 2018
Location: Ramona, CA
Posts: 291
Default Prop balancing

I still help balance props. Just text me at 760 443 3089
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RV-7 builder Ramona, CA.
Free prop balancing for Vanís owners.
RV-6A N665CM
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