Sorry about that, Darrin. I was assuming it was a dog teeth type design. And it was getting stuck trying to mesh.
Lyle --- BFRListmail <[EMAIL PROTECTED]> wrote: > Lyle, > > Guess I don't follow you 100%. > My transmission uses two different sets of sprockets > between two jackshafts. > A sprag (overrunning clutch) for 1st gear. Was > 1.54:1 ratio. Currently > 1.82:1 ratio. I engage an electric clutch with a > 1:1 ratio. This causes > the gearing on the sprag to overrunn. It's like a > ratchet. > Make sense? Can you expand on what you just said. > > Later, > > Darin > > ----- Original Message ----- > From: "lyle sloan" <[EMAIL PROTECTED]> > To: "ElectricMotorcycles" > <[email protected]> > Sent: Saturday, October 28, 2006 12:19 PM > Subject: Re: [ElectricMotorcycles] Latest on the > BadFish Drag Bike > > > > For the Pirahna, you have a 2 motor design. Could > you > > use the second motor as drag during the > transition? > > Essentially, switch the second motor to reverse to > > provide drag (with just the right voltage, of > course) > > and switch gears. Then put to normal and > accelerate. > > The reason I say this is I think when the motor > > transitions to 2nd gear it is too close in speed > to > > mesh if it hits wrong. > > > > I want to ask what kind of clutch you got but I am > > afraid that might be a trade secret. :) > > > > Lyle > > > > --- BFRListmail <[EMAIL PROTECTED]> > wrote: > > > >> Hi all, > >> > >> Well, Mike asked for a report on how the gear > >> changed worked on my bike, so > >> here goes. > >> > >> Went Wednesday to the Milan Dragway Test/Tune > >> session. I'd only been to one > >> other wednesday nite race, and it was pretty > packed. > >> This nite was the > >> same, and the last one for the year. Even the 40 > >> degree nitetime temps > >> didn't scare anybody off. Guess those gassers > make > >> big power in the cold, > >> but I was definately down on power. I can always > >> squeak 600 amps out of > >> each string of Hawkers, but this time I could > only > >> pull about 500. > >> > >> Launches were OK. I geared 1st gear just a tad > >> taller than my last time to > >> the track where I was getting quite a bit of > wheel > >> spin. The track was > >> definately cold, but was also sticky. 2nd run I > >> made I thought I pulled the > >> front end up, at least stroked the shocks out, > but > >> maybe didn't lift the > >> wheel. One guy commented on how the bike > launched > >> really good, but just > >> quit a few hundred feet out. I can't even feel > the > >> clutch pull in. Not at > >> all. Looking at the data confirmed what that guy > >> said. You can see the > >> volts drop and amps spike when the clutch comes > in. > >> But the amps take > >> forever to drop back off. The volt take forever > to > >> come back up. I was > >> clearing the 1/4 mile at about 2000 RPM. I can > run > >> about 2900 RPM in 1st > >> gear. > >> > >> Analysis? That larger split between 1st and 2nd > >> gear is bogging the motors > >> down. But mathmatically, I don't know why I went > >> with such a steep 2nd > >> gear. At 2900 RPM I'd be turning probably 90 > MPH. > >> Not going to happen. > >> > >> So then I did some homework. I read that a shunt > >> motor (mostly the same as > >> a PM motor) doesn't respond well to changes in > load. > >> I guess I've proven > >> that. A shunt motor won't make the torque to > >> reaccelerate the load. A > >> series motor is the answer for that, or at least > a > >> compound motor. > >> > >> So I'm looking at a few options: > >> > >> A) Change the gearing so 1st gear is 1.375:1 and > 2nd > >> gear is 1:1. This will > >> put a smaller load change on the motors, and > should > >> hit just over 70 at 2900 > >> RPM. > >> > >> B) Lower the voltage way down on the clutch > (voltage > >> yet to be determined) > >> so that the clutch actually slips and bring on > the > >> added load slowly. Might > >> tear up the clutch though? > >> > >> C) Toss the transmission and see if I can get it > >> running as quick as I did > >> before the transmission. > >> > >> > >> Oh yea, Suncoast can ignore the preceeding as > this > >> is all in an attempt to > >> dominate at the upcoming Battery Beach Burnout. > >> > >> > >> Later, > >> > >> Darin > >> BadFishRacing > >> > >> ----- Original Message ----- > >> From: "Mike" <[EMAIL PROTECTED]> > >> To: "ElectricMotorcycles" > >> <[email protected]> > >> Sent: Friday, September 22, 2006 10:44 AM > >> Subject: Re: [ElectricMotorcycles] Harley Drags > >> > >> > >> > >About the only thing I haven't tried is > changing > >> the gearing between 1st > >> > >and 2nd gear. What are you guys with 2 speeds > >> running for gear ratios? > >> > >Or if you're running 2nd and 4th gear? I > don't > >> think I've got enough > >> > >leap from 1st to 2nd, as I can't seem to SUCK > >> AMPS when I grap 2nd gear. > >> > >Any thoughts? > >> > > >> > Darrin, Did you find any answers since you > posted > >> the above? I'm always > >> > curious. > >> > > >> > Mike > >> > > >> > -- > >> > > >> > The Electric Motorcycle Portal > >> > http://www.electricmotorcycles.net/ > >> > > >> > Electric Motorcycle Listserv > >> > http://www.electricmotorcycles.net/listserv > >> > > >> > > >> > > >> > -- > >> > No virus found in this incoming message. > >> > Checked by AVG Free Edition. > >> > Version: 7.1.405 / Virus Database: 268.12.8/455 > - > >> Release Date: 9/22/2006 > >> > > >> > > >> > >> > >> > > > === message truncated === ____________________________________________________________________________________ We have the perfect Group for you. Check out the handy changes to Yahoo! Groups (http://groups.yahoo.com)
