## Action i: Gear ratio of at least 3:1

trdd
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### Action i: Gear ratio of at least 3:1

Action i:
Use at least a 3:1 ratio gear system to initiate the next action.

Use this post to comment on this task.

trdd
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### Re: Action i: Gear ratio of at least 3:1

Question for everyone here:

Let's say I have a gear with 10 teeth and a mating gear with 30 teeth.

To achieve a 3:1 ratio is the 10 teeth gear the driving gear or the driven gear?

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### Re: Action i: Gear ratio of at least 3:1

trdd wrote:
October 21st, 2019, 8:10 am
Question for everyone here:

Let's say I have a gear with 10 teeth and a mating gear with 30 teeth.

To achieve a 3:1 ratio is the 10 teeth gear the driving gear or the driven gear?
Gear ratio is defined as output:input, so the gear with 10 teeth would be driving the gear with 30 teeth.
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trdd
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### Re: Action i: Gear ratio of at least 3:1

Umaroth wrote:
October 21st, 2019, 8:26 am
trdd wrote:
October 21st, 2019, 8:10 am
Question for everyone here:

Let's say I have a gear with 10 teeth and a mating gear with 30 teeth.

To achieve a 3:1 ratio is the 10 teeth gear the driving gear or the driven gear?
Gear ratio is defined as output:input, so the gear with 10 teeth would be driving the gear with 30 teeth.
That's what I thought. I wanted everyone to know and be clear about it as there could be competitors using a 1:3 ratio instead by mistake.

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### Re: Action i: Gear ratio of at least 3:1

NSO posted the following relevant FAQ:

Question:
"a 3:1 rato gear system. . ." Does this mean output teeth/input teeth = 3, or the other way around? Thanks.

Response:
The rules don't specify the direction it must go.

Edlc1
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### Re: Action i: Gear ratio of at least 3:1

I have a 3:1 ratio gear system initiating the screw/wing nut action, while the gears run so is the screw/wing nut. The ES at our last invitational said that they were parallel actions. The rules state that the 3:1 ratio gear system initiates the next action, but does not specify minimum rotations to complete the gear action. I posted a question on the FAQ at sonic.org, but no reply yet. Can anyone comment on this?. Thank you

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### Re: Action i: Gear ratio of at least 3:1

Edlc1 wrote:
December 13th, 2019, 6:14 pm
I have a 3:1 ratio gear system initiating the screw/wing nut action, while the gears run so is the screw/wing nut. The ES at our last invitational said that they were parallel actions. The rules state that the 3:1 ratio gear system initiates the next action, but does not specify minimum rotations to complete the gear action. I posted a question on the FAQ at sonic.org, but no reply yet. Can anyone comment on this?. Thank you
I would say that as long as the gear system initiates the next action, (which it sounds like yours does) then it doesn't matter how much it should turn since there is no specification.
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scioly1
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### Re: Action i: Gear ratio of at least 3:1

Could the 3:1 gear ratio pull on a string which lift a golf ball up (action vii) or would i need to do something like push a weight which lifts the golf ball?

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### Re: Action i: Gear ratio of at least 3:1

How can you claim a gear system is 3:1 if it doesn't do the rotations as expected?

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### Re: Action i: Gear ratio of at least 3:1

GPRSTEM wrote:
January 8th, 2020, 7:22 am
How can you claim a gear system is 3:1 if it doesn't do the rotations as expected?
There is no minimum rotation given.
scioly1 wrote:
January 7th, 2020, 11:59 am
Could the 3:1 gear ratio pull on a string which lift a golf ball up (action vii) or would i need to do something like push a weight which lifts the golf ball?
The gear system must initiate the next action, if you word your ASL carefully, you should be able to make that work.
I can't think of anything else to put here, so I just wrote this...

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