2017 was our 20th year online!

Welcome to the Piano World Piano Forums
Over 2.9 million posts about pianos, digital pianos, and all types of keyboard instruments
Join the World's Largest Community of Piano Lovers (it's free)
It's Fun to Play the Piano ... Please Pass It On!

Shop our online store for music lovers
SEARCH
Piano Forums & Piano World
(ad)
Petrof Pianos
Petrof Pianos
(ad)
Pianoteq
PianoTeq Karsten Collection
(ad)
Piano Life Saver - Dampp Chaser
Dampp Chaser Piano Life Saver
Who's Online Now
41 members (AjinoRegret, CLM Piano Learner, chopinetto, Damon, albydooby, anotherscott, Almaviva, bsntn99, 14 invisible), 442 guests, and 202 robots.
Key: Admin, Global Mod, Mod
(ad)
Estonia Pianos
Estonia Pianos
Previous Thread
Next Thread
Print Thread
Hop To
String deflection
#2600827 01/03/17 10:57 PM
Joined: Nov 2010
Posts: 134
Full Member
OP Offline
Full Member
Joined: Nov 2010
Posts: 134
How is the amount of force required to deflect a piano wire calculated? I want to find this so I can calculate how much downbearing force a single and/or set of strings will give at a specific deflection distrance.

Thanks,


Daniel Bussell MPT
Mead Piano Works
East Tennessee

(ad)
Piano & Music Accessories
piano accessories music gifts tuning and moving equipment
Re: String deflection
meadpiano #2600829 01/03/17 11:05 PM
Joined: Oct 2004
Posts: 1,205
D
1000 Post Club Member
Offline
1000 Post Club Member
D
Joined: Oct 2004
Posts: 1,205
Multiply the sine of the angle by the string tension for downbearing force. For example the sine of 1 degree is .0175. So, if you have a deflection of 1 degree and a string tension of 160 pounds then:

160 x .0175=2.8

It's fairly straightforward math.

Edit:
Of course in theory it's simple but in practice it's a complex system and theoretical downbearing is almost never what the actual measured downbearing ends up being.

Last edited by Dale Fox; 01/03/17 11:08 PM.

Dale Fox
Registered Piano Technician
Remanufacturing/Rebuilding
Re: String deflection
meadpiano #2600841 01/03/17 11:40 PM
Joined: Nov 2010
Posts: 134
Full Member
OP Offline
Full Member
Joined: Nov 2010
Posts: 134
OK that helps! I was thinking it was more complicated than that. I thought the diameter (gauges) would give some variation through A0-C88. But maybe it's just not a significant difference?


Daniel Bussell MPT
Mead Piano Works
East Tennessee


Moderated by  Piano World 

Link Copied to Clipboard
What's Hot!!
News from the Piano World
Where Did The Buttons Go?!
----------------------
Our April 2020 Newsletter Available Online Now...
The Piano World During the Pandemic!
----------------------
Posting Pictures on the Forums
-------------------
Forums RULES & HELP
-------------------
ADVERTISE on Piano World
(ad)
Best of Piano Buyer
 Best of Piano Buyer
(ad)
Faust Harrison Pianos
Faust Harrison 100+ Steinway pianos
Download Sheet Music
Virtual Sheet Music - Classical Sheet Music Downloads
New Topics - Multiple Forums
Comparing Pramberger v W. Hoffman
by KazzyO - 07/15/20 09:59 PM
Scarlatti and Me
by jon-nyc - 07/15/20 06:01 PM
Isao Tomita's electronic arrangmenet of Mussorgsky...
by CianistAndPomposer - 07/15/20 03:37 PM
Chromatic Layout for Pianos
by Lawrence Fields - 07/15/20 01:41 PM
Forum Statistics
Forums41
Topics200,282
Posts2,981,189
Members97,785
Most Online15,252
Mar 21st, 2010
Please Support Our Advertisers


Faust Harrison 100+ Steinways

Dampp Chaser Piano Life Saver

 Best of Piano Buyer

PianoTeq Bechstein
Visit our online store for gifts for music lovers

Virtual Sheet Music - Classical Sheet Music Downloads



 
Help keep the forums up and running with a donation, any amount is appreciated!
Or by becoming a Subscribing member! Thank-you.
Donate   Subscribe
 
Our Piano Related Classified Ads
| Dealers | Tuners | Lessons | Movers | Restorations | Pianos For Sale | Sell Your Piano |

Advertise on Piano World
| Subscribe | Piano World | PianoSupplies.com | Advertise on Piano World |
| |Contact | Privacy | Legal | About Us | Site Map | Free Newsletter |


copyright 1997 - 2020 Piano World ® all rights reserved
No part of this site may be reproduced without prior written permission
Powered by UBB.threads™ PHP Forum Software 7.7.4