pic: Spectrum Fall 2013 Drivetrain

[donkehote]

Originally Posted by AllenGregoryIV

Thanks Kevin, I should have clarified, that I was looking for more sizes that just the 42t AM pulleys.

I wish there were more sizes too. Ive been thinking of cadding up a drivetrain using only gears, but I could never justify the weight when compared to the same thing with the plastic 42 tooth pulleys and 15mm belts. Always liked the idea though.
How are you planning on adjusting the backlash on all those gears, or are you not worried. I cant see it being a major issue, but i thought id ask.

[AllenGregoryIV]

Originally Posted by donkehote

I wish there were more sizes too. Ive been thinking of cadding up a drivetrain using only gears, but I could never justify the weight when compared to the same thing with the plastic 42 tooth pulleys and 15mm belts. Always liked the idea though.
How are you planning on adjusting the backlash on all those gears, or are you not worried. I cant see it being a major issue, but i thought id ask.

I agree that belts would be lighter, though we really haven't had a weight problem the last two years. We actually have been struggling to get up to 120lbs, to get more traction. Right now I would take the smaller footprint over the lesser weight option.

I haven't thought about the backlash, several teams have done gear drives and haven't mentioned it being a problem.

[IndySam]

Originally Posted by AllenGregoryIV

I agree that belts would be lighter, though we really haven't had a weight problem the last two years. We actually have been struggling to get up to 120lbs, to get more traction. Right now I would take the smaller footprint over the lesser weight option.

I haven't thought about the backlash, several teams have done gear drives and haven't mentioned it being a problem.

Backlash, what backlash? Not a problem. Also we were under 80lbs this year so weight wasn't a problem for us.

The new small drive size was one of the factors that made a gear drive practical this past year in both weight and cost.

[Seth Mallory]

Originally Posted by AllenGregoryIV

I agree that belts would be lighter, though we really haven't had a weight problem the last two years. We actually have been struggling to get up to 120lbs, to get more traction. Right now I would take the smaller footprint over the lesser weight option.

I haven't thought about the backlash, several teams have done gear drives and haven't mentioned it being a problem.

I like your effort for making a smaller footprint. For the last couple of years 192 has been working to reduce the footprint in a different way. For those that know 192 you will be shocked to hear that the students have a new gear box that should be more space saving then the last 2 years.

Originally Posted by Seth Mallory

I like your effort for making a smaller footprint. For the last couple of years 192 has been working to reduce the footprint in a different way. For those that know 192 you will be shocked to hear that the students have a new gear box that should be more space saving then the last 2 years.

More than the last two years?! I can't wait to see this. Any idea when this super-compact transmission will debut?

[Seth Mallory]

As a mentor I cannot release that information. That is up to the students. Announcing that we are building a new gear box is not news as in last 12 years the students have designed and built new gear box's all but 1 year. Gear box's are a great engineering project for students.