pic: Team 836 2-speed transmission

[SteveGPage]

loading photo ...

[SteveGPage]

Here is our 2-speed transmission, using a pneumatic shifter.

[RoboDriver1718]

The transmission looks great. KUDOS

[Zero-Bee]

And it works too. :Q

[Arefin Bari]

Looks nice. I like how you guys are putting the motor inside the plate. Few questions...

1) What are the gear ratios on there?
2) Are you guys using only one small CIM per side?
3) Is there a way to adapt another small CIM or a big CIM into that tranny?
4) How heavy is that?
5) I can't really see the dog gear... but can you shift on fly?

Good luck at the competitions and if you guys are at any event that I am attending, I will make sure to stop by and check you guys out. =)

[tim-tim]

Originally Posted by Arefin Bari

Looks nice. I like how you guys are putting the motor inside the plate. Few questions...

1) What are the gear ratios on there?
2) Are you guys using only one small CIM per side?
3) Is there a way to adapt another small CIM or a big CIM into that tranny?
4) How heavy is that?
5) I can't really see the dog gear... but can you shift on fly?

Good luck at the competitions and if you guys are at any event that I am attending, I will make sure to stop by and check you guys out. =)

To answer a few of your questions:
1) High gear is 21.96 to 1
Low gear is 65.88 to 1 (both of these are to the wheel)
2) Yes, one 2.5 inch per side
3) Yes, but a small redesign would be required
4) A whole whooping 8.8 pounds per each side with motor and pneumatic shifter
5) Most definitely

We will be competing at the Trenton and Anapolis Regionals

[swamp_child]

Uh-oh exploding ifi wheels. trust me, you should definitely change those!

[Karthik]

Originally Posted by swamp_child

Uh-oh exploding ifi wheels. trust me, you should definitely change those!

I'm not quite sure why you'd say that. Hundreds of teams used IFI wheels last year, and only a handful experienced problems. Even though the problems were few and far between, this off-season IFI looked at the problems and designed a new version of their wheels. The new version addressed all the complaints and issues brought up during the 2006 season. They even took the time to have these wheels beta-tested by an FRC team. Their new wheels are tested and proven. There were no "explosions" in these tests.

[swamp_child]

Originally Posted by Karthik

I'm not quite sure why you'd say that. Hundreds of teams used IFI wheels last year, and only a handful experienced problems. Even though the problems were few and far between, this off-season IFI looked at the problems and designed a new version of their wheels. The new version addressed all the complaints and issues brought up during the 2006 season. They even took the time to have these wheels beta-tested by an FRC team. Their new wheels are tested and proven. There were no "explosions" in these tests.

still, those wheels (ok the wheels last year) lost us 3 first place trophies.

[M4 Sherman]

Originally Posted by swamp_child

still, those wheels (ok the wheels last year) lost us 3 first place trophies.

Last year's wheels got us one first place trophy!

[tim-tim]

Originally Posted by swamp_child

Uh-oh exploding ifi wheels. trust me, you should definitely change those!

We have not have a problem with the wheels, and used them last year as well.