The Spares Company
Club Shop/Regalia
Parent Website
Contact Officials
Machine Registrar
Club Secretary
Membership Secretaries
MPH Editor and Forum Administrator.
Section Newsletters
Technical Databases
Photos
Home
What's new
Latest activity
Forums
New posts
What's new
New posts
Latest activity
Information
Bike Modifications
Machine Data Services
Manufacturers Manuals
Spare Parts Listings
Technical Diagrams
Whitakerpedia (Vincent Wiki)
The Club
MPH Material Archive
Flogger's Corner
Obituaries
VOC Sections
Local Sections
Local Section Newsletters
Miscellaneous
Club Assets
Club History
Club Rules
Machine Data Services
Meeting Documents
Miscellaneous
Essential Reading
Magazine/Newspaper Articles/Letters
Adverts and Sales Brochures
The Mighty Garage Videos
Bikes For Sale (Spares Company)
Log in
Register
What's new
New posts
Menu
Log in
Register
Install the app
Install
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="macvette" data-source="post: 78075" data-attributes="member: 262"><p>Hi,</p><p>Whilst the major contributors to this thread have a thorough understanding of spring mechanics, there will be followers of the thread who may not understand why Greg says in this post that shortening an existing spring increases its spring rate. This is because the material in coil springs is subject to torsional stress as they are compressed.</p><p>Shortening the spring reduces the amount of material available to resist the force so the spring rate is increased. To experience practically, clamp a piece of flat bar in a vice ( say 1/8"x 1/2"x 12"), grip the free end firmly with mole grips and twist it (putting it in torsion).. Now move about 1/2 way to vice and try again. You will find much harder to produce the same deflection. This is because in this latter case you have reduced the amount of material available to absorb the applied force without changing the cross section of the material. This is the same effect which happens when a coil spring is shortened . </p><p>Mac</p></blockquote><p></p>
[QUOTE="macvette, post: 78075, member: 262"] Hi, Whilst the major contributors to this thread have a thorough understanding of spring mechanics, there will be followers of the thread who may not understand why Greg says in this post that shortening an existing spring increases its spring rate. This is because the material in coil springs is subject to torsional stress as they are compressed. Shortening the spring reduces the amount of material available to resist the force so the spring rate is increased. To experience practically, clamp a piece of flat bar in a vice ( say 1/8"x 1/2"x 12"), grip the free end firmly with mole grips and twist it (putting it in torsion).. Now move about 1/2 way to vice and try again. You will find much harder to produce the same deflection. This is because in this latter case you have reduced the amount of material available to absorb the applied force without changing the cross section of the material. This is the same effect which happens when a coil spring is shortened . Mac [/QUOTE]
Insert quotes…
Verification
What was Mr Irving's Christian Name?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top