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
Three-gear primary drive (Irving Vincent)
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="timetraveller" data-source="post: 118797" data-attributes="member: 456"><p>I was thinking of something simpler than a planetary gear. Imagine a 2"/50mm PCD gear on the engine main shaft with the teeth pointing inwards. This can be made very strong and possibly fastened on to the first drive gear. Then imagine an alternator, mounted onto the primary chain cover in such a way that sliding the primary cover on slides the gear on the alternator shaft into mesh with the larger gear. The alternator shaft gear would have a gear with outwards facing teeth with a PCD of 1"/25 mm. Please note that these values are for example only and the gears might need to be made larger for strength or other reasons. This would rotate the alternator at double the engine speed and have the added advantage that the alternator and its wiring are fixed to the primary drive cover. It would also allow the alternator to be moved to the rear a little this getting round the possible restriction of the diameter of the original crank case casting at the front of the primary drive. I have not drawn this up with CAD but until I do then I cannot see where any problems would lie. It might be thought that driving the alternator gear from only one side might cause problems but that is exactly what happens in gearboxes and on the original dynamo drive. I am happy to exchange ideas and accept criticism.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 118797, member: 456"] I was thinking of something simpler than a planetary gear. Imagine a 2"/50mm PCD gear on the engine main shaft with the teeth pointing inwards. This can be made very strong and possibly fastened on to the first drive gear. Then imagine an alternator, mounted onto the primary chain cover in such a way that sliding the primary cover on slides the gear on the alternator shaft into mesh with the larger gear. The alternator shaft gear would have a gear with outwards facing teeth with a PCD of 1"/25 mm. Please note that these values are for example only and the gears might need to be made larger for strength or other reasons. This would rotate the alternator at double the engine speed and have the added advantage that the alternator and its wiring are fixed to the primary drive cover. It would also allow the alternator to be moved to the rear a little this getting round the possible restriction of the diameter of the original crank case casting at the front of the primary drive. I have not drawn this up with CAD but until I do then I cannot see where any problems would lie. It might be thought that driving the alternator gear from only one side might cause problems but that is exactly what happens in gearboxes and on the original dynamo drive. I am happy to exchange ideas and accept criticism. [/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
Three-gear primary drive (Irving Vincent)
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