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
New ESA Design
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="oexing" data-source="post: 89544" data-attributes="member: 1493"><p>When you add up all material in the triplex chain cross sections of one link , what do you think would snap first , the chain or three lobes ? There must be some info about the torque the crank delivers but I am not able to calculate what the lobes would take at their radius. My guess, the crank produces only a fraction of the max torque the lobes can handle. </p><p> Looking at the drawing above one can imagine the effect of the very steep curve. Theoretically you almost don´t need any springs at all when the big female radius goes all up to the centre line as the contact faces are almost vertical there. Add to that the enormous friction from the high pressure contact area plus spring forces and you will see the very progressive damping effect that a deeper cam shape will achieve. I did not go to vertical for the max lift on the test set, instead studied the BMW parts and concluded to copy their looks feeling that this should easily do. </p><p> I can add sizes of the BMW parts if needed, but they are a lot smaller in dia. and only two lobes. Sure , only max 300 cc with that originally from a R 69 S, but they had this type up to the R 100 two valve types - nobody never ever spent any thoughts on these items, there was never a problem there. Mind you, that shock absorber is the only one on the whole bike, no other chains anywhere , all gears from front to rear, so not even a minimal damping from chains that may help. </p><p></p><p> Vic</p></blockquote><p></p>
[QUOTE="oexing, post: 89544, member: 1493"] When you add up all material in the triplex chain cross sections of one link , what do you think would snap first , the chain or three lobes ? There must be some info about the torque the crank delivers but I am not able to calculate what the lobes would take at their radius. My guess, the crank produces only a fraction of the max torque the lobes can handle. Looking at the drawing above one can imagine the effect of the very steep curve. Theoretically you almost don´t need any springs at all when the big female radius goes all up to the centre line as the contact faces are almost vertical there. Add to that the enormous friction from the high pressure contact area plus spring forces and you will see the very progressive damping effect that a deeper cam shape will achieve. I did not go to vertical for the max lift on the test set, instead studied the BMW parts and concluded to copy their looks feeling that this should easily do. I can add sizes of the BMW parts if needed, but they are a lot smaller in dia. and only two lobes. Sure , only max 300 cc with that originally from a R 69 S, but they had this type up to the R 100 two valve types - nobody never ever spent any thoughts on these items, there was never a problem there. Mind you, that shock absorber is the only one on the whole bike, no other chains anywhere , all gears from front to rear, so not even a minimal damping from chains that may help. Vic [/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
New ESA Design
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