3 speed automatic

[motor_head]

it based on comets 2 speed but this is a three speed had to run another jackshaft because 1 clutch and 2 sprockets would never fit on crankshaft

 

[Kaptain Krunch]

1200rpm engagement...you would take off at idle.

 

[motor_head]

thats jackshaft rpm the engine rpm would be 3600 rpm

 

[Kaptain Krunch]

Oh i get it, but it seems like a lot of work and money. just get a sled or MC engine.

 

[motor_head]

yeah if you can find them go for a sled or motorcycle motor but around here there kind of hard to find

 

[mike75925]

i was thinking about doing that too. how many clutches does your configuration call for? including the engine/axle.

 

[motor_head]

just the three thats pictured but i don't not if they make clutches/springs that engage at about those rpm

 

[squat251]

thats a sweet set up, post a vid of it when you get it made, id like to see it working, prolly hard to get the camera to look at it while driving tho i suppose

 

[BradenM]

I like the concept; I look forward to seeing how you fair.

 

[Lex]

Looks interesting, let me know how this goes

 

[modelengineer]

Remember that the lower range clutches need to disengage while the others engage...
Unless I didn't look closely enough at the diagram, which I didn't since automatics are crap

 

[mike75925]

the two speed setups use one way bearings on one and anan axle clutch on the other, you would probably be better off with two one ways and an axle clutch

 

[Lex]

Remember that the lower range clutches need to disengage while the others engage...
Unless I didn't look closely enough at the diagram, which I didn't since automatics are crap

Each to their own dude, I mean i know I'm knew here and all but the site is called "DIY Go Kart".. Let the people experiment and have some fun?

 

[motor_head]

thats a sweet set up, post a vid of it when you get it made, id like to see it working, prolly hard to get the camera to look at it while driving tho i suppose

first id need a video camera then i have to figure out something to put it on lol

 

[Lex]

first id need a video camera then i have to figure out something to put it on lol

Bummer, well if you can't do it atm can you draw some better plans for those who are interested and have parts to spare?

 

[burningmetalmaniac]

this is in theory, a brilliant setup, and you can realisticly change the engagement rpm by changing the spring tension, or the weight of the clutches to conform to the engagement properties that you need, but the dis-engagement is the problem. if you can figure that out, you've got it made. even if you don't have a video cam, let us know how it turns out, if it works, it would be a sick setup for the rest of us to go by.

 

[motor_head]

the one way sprockets can freewheel just like the rear sprocket setup on a bike
when this setup shifts(a clutch engages) the second jack shaft rpms pick up so the previous gear is is spinning the one way sprocket on the first jackshaft faster than the first jackshafts rpm
it's like if your on a bike and your coasting down a hill you can spin the pedals slower that the wheel but you can't spin them faster because it will force the the tire to spin faster

 

[motor_head]

heres a computer generated pic rather than hand drawn
in theory this thing could out pull a tav because of the greater ratio variance

 

[mike75925]

have you figured out which sizes you will use? 1st gear 9t, sec 10, third 11/12?

 

[motor_head]

doesn't really matter as long as i keep the same ratios
mainly depends on what i can find and for how much