Maybe this is out of the realm of possibilities for you, but why not try something like this for your transmission? It would have to be custom made for your application, but it is not too complex. A lot of the basic design work is complete, all you would have to do is scale it up for your application. There is also a 3-speed version. If I were to use a design like this, I would also consider using a manual shifting lever instead of the spring based clutch.
http://www.hpiracing.com/graphics/instr/a297.pdf -Charley [EMAIL PROTECTED] wrote: Send ListServ mailing list submissions to [email protected] To subscribe or unsubscribe via the World Wide Web, visit http://electricmotorcycles.net/mailman/listinfo/listserv_electricmotorcycles.net or, via email, send a message with subject or body 'help' to [EMAIL PROTECTED] You can reach the person managing the list at [EMAIL PROTECTED] When replying, please edit your Subject line so it is more specific than "Re: Contents of ListServ digest..." Today's Topics: 1. Motorcycle transmission-motor interfacing (Jeff) 2. Re: Motorcycle transmission-motor interfacing (BFRListmail) 3. Re: Motorcycle transmission-motor interfacing ([EMAIL PROTECTED]) ---------------------------------------------------------------------- Message: 1 Date: Thu, 30 Nov 2006 21:21:06 -0600 From: Jeff Subject: [ElectricMotorcycles] Motorcycle transmission-motor interfacing To: [email protected] Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=windows-1252; format=flowed I am doing some preliminary research on what probably will be turning into a long-range project. I'm wanting to hook up a permanent magnet motor of around 1 to 1-1/2 hp, (though the lower end of that power range is preferred) to a motorcycle gearbox. I want it to have a wide-range set of gears so as to be able to have a wide range of speeds and torqes available. Sometimes I will want to be running it at normal speeds, and other times (such as when towing heavy loads up steep hills) I want slow, steady torque. The common EV method of choosing one gear ratio, and making the motor and controller and battery pack deal with the overload is not an option in this project. I also need to keep the assembly size as small as possible, so as a result was thinking possibly about a 150-250 cc motocross bike or ATV engine that's blown a piston or something. I have no access to motorcycles on a regular basis, so have no way to check any of this out unless I pretty well know the answers before I get there. So, I'm wondering if this a feasible idea, or am I barking up the wrong tree? I need 4 or 5 speeds in a compact package (the smaller the better), and a motorcycle gearbox is adaptable to electric shift (that's one of the other requirements). Can anyone point me to a good source of info for what I?m trying to do? I have already found much of the controller info I need, but the mechanical stuff is harder to come by. Thanks! jeff ------------------------------ Message: 2 Date: Fri, 1 Dec 2006 06:41:38 -0500 From: "BFRListmail" Subject: Re: [ElectricMotorcycles] Motorcycle transmission-motor interfacing To: "ElectricMotorcycles" Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; format=flowed; charset="Windows-1252"; reply-type=response Hi Jeff, Not really an expert on motorcycle transmission, but the first thing that comes to mind is, I assume you don't want to clutch it? That would leave out a lot of transmissions. I'm thinking some of the smaller kids type motorcycles run without a clutch. My brother old Honda CT70 comes to mind. Only 3 speed though. Do you want electric upshift and downshift as well? Later, Darin BadFishRacing ----- Original Message ----- From: "Jeff" To: Sent: Thursday, November 30, 2006 10:21 PM Subject: [ElectricMotorcycles] Motorcycle transmission-motor interfacing >I am doing some preliminary research on what probably will be turning into >a long-range project. > > I'm wanting to hook up a permanent magnet motor of around 1 to 1-1/2 hp, > (though the lower end of that power range is preferred) to a motorcycle > gearbox. > > I want it to have a wide-range set of gears so as to be able to have a > wide range of speeds and torqes available. > > Sometimes I will want to be running it at normal speeds, and other times > (such as when towing heavy loads up steep hills) I want slow, steady > torque. The common EV method of choosing one gear ratio, and making the > motor and controller and battery pack deal with the overload is not an > option in this project. > > I also need to keep the assembly size as small as possible, so as a result > was thinking possibly about a 150-250 cc motocross bike or ATV engine > that's blown a piston or something. > > I have no access to motorcycles on a regular basis, so have no way to > check any of this out unless I pretty well know the answers before I get > there. > > So, I'm wondering if this a feasible idea, or am I barking up the wrong > tree? I need 4 or 5 speeds in a compact package (the smaller the better), > and a motorcycle gearbox is adaptable to electric shift (that's one of the > other requirements). > > Can anyone point me to a good source of info for what I?m trying to do? > I have already found much of the controller info I need, but the > mechanical stuff is harder to come by. > > Thanks! > jeff > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.409 / Virus Database: 268.15.2/559 - Release Date: 11/30/2006 > > ------------------------------ Message: 3 Date: Fri, 1 Dec 2006 11:57:48 EST From: [EMAIL PROTECTED] Subject: Re: [ElectricMotorcycles] Motorcycle transmission-motor interfacing To: [email protected] Message-ID: Content-Type: text/plain; charset="us-ascii" In my mind the ideal (street) transmission for an electric motorcycle is a small version of a Harley style stand alone belt driven transmission. It would use a belt drive from the electric motor to the transmission and enable either a chain or belt final drive. It would need only two speeds if the torque of the electric motor is substantial enough. The first speed would serve for acceleration and speeds below 45MPH and the second gear would serve sustained high speed cruising at highway speeds 45 to 75. It would accept a number of shift mechanisms including manual linkage, pneumatic (air shifter), electric. In general it would be a manual shift, but those opposed, could rig up some sort of electric auto mode based on road speed or motor rpms. However, the Harley styled transmissions that I have found available on the web are 4 to 6 speeds (overkill for an EV) and are high priced (>$1,000) due to the current demand for custom motorcycles and features (that I don't need) such as chrome polished covers etc. I think Darin uses one for drag racing that might meet my needs, but I do not know how streetable it is or how much one costs? Mike Bachand DEVC/EAA 1994 Kawasaki Ninja EV _http://www.austinev.org/evalbum/type/MTCY_ (http://www.austinev.org/evalbum/type/MTCY) _http://electricmotorcycles.net/modules/xcgal/index.php?cat=10009_ (http://electricmotorcycles.net/modules/xcgal/index.php?cat=10009) -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/listserv_electricmotorcycles.net/attachments/20061201/459837c4/attachment-0001.html End of ListServ Digest, Vol 15, Issue 1 *************************************** --------------------------------- Check out the all-new Yahoo! 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