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: 89501" data-attributes="member: 1493"><p>I do NOT think any sort of springs should provide the limits in the ESA, instead the shape of the cams must be steep enough to grant a progressive action. That is why I used the idea from the BMW design modified for three cams for the Vincent engine. They had this type from the fifties in all bikes for a reason up till now so that could be called tested and approved. My contribution in the Robinson cam thread regarding ESA design should better have gone into a more suitable place like here, maybe the moderator could shift that as he likes.</p><p> Whoever responsible for machining, designing or modifying spare parts, I hope they read these pages occasionally to bump into ideas worthy of consideration. Sorry for not knowing whom to contact first, I just wanted to start some discussions and maybe later we might come up with more radical ideas for promising improvements . The factory design is now more than half a century old and to this day drivers are still faced with same old calamities from day one. Somehow most motorcycle companies seem to have copied the same (wrong) design more or less, pairing very strong springs, single or multiple, with way too shallow cam design. The result is miserable, springs hitting block length plus shocks sent into the primary drive. Springs shall not suffer block compression, breakage is the price. That is why the proper progressive stop has to be the cam set in the ESA, not the springs.</p><p> Some more pictures that I did not post in the camshaft thread, but related to ESA:</p><p></p><p> Vic</p><p></p><p>P.S. I will happily ship my alu test pair for studies and hopefully used for designing new ESA sets suitable for driving tests. </p><p></p><p></p><p>[ATTACH=full]18416[/ATTACH]</p><p></p><p></p><p>[ATTACH=full]18417[/ATTACH]</p><p></p><p></p><p>[ATTACH=full]18418[/ATTACH]</p><p></p><p></p><p>[ATTACH=full]18419[/ATTACH]</p></blockquote><p></p>
[QUOTE="oexing, post: 89501, member: 1493"] I do NOT think any sort of springs should provide the limits in the ESA, instead the shape of the cams must be steep enough to grant a progressive action. That is why I used the idea from the BMW design modified for three cams for the Vincent engine. They had this type from the fifties in all bikes for a reason up till now so that could be called tested and approved. My contribution in the Robinson cam thread regarding ESA design should better have gone into a more suitable place like here, maybe the moderator could shift that as he likes. Whoever responsible for machining, designing or modifying spare parts, I hope they read these pages occasionally to bump into ideas worthy of consideration. Sorry for not knowing whom to contact first, I just wanted to start some discussions and maybe later we might come up with more radical ideas for promising improvements . The factory design is now more than half a century old and to this day drivers are still faced with same old calamities from day one. Somehow most motorcycle companies seem to have copied the same (wrong) design more or less, pairing very strong springs, single or multiple, with way too shallow cam design. The result is miserable, springs hitting block length plus shocks sent into the primary drive. Springs shall not suffer block compression, breakage is the price. That is why the proper progressive stop has to be the cam set in the ESA, not the springs. Some more pictures that I did not post in the camshaft thread, but related to ESA: Vic P.S. I will happily ship my alu test pair for studies and hopefully used for designing new ESA sets suitable for driving tests. [ATTACH=full]18416[/ATTACH] [ATTACH=full]18417[/ATTACH] [ATTACH=full]18418[/ATTACH] [ATTACH=full]18419[/ATTACH] [/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