Mission Possible C

[Ashernoel]

I’d argue it would be allowed for shorter tasks like thermal expansion, but it would not be allowed for timer tasks based on the “burn out quickly” language.

[PM2017]

How would one classify a combustible fuse? Is it like your standard combustible fuse for fireworks, or any combustible reaction that acts as a fuse? Because this could mean that matches and candles could count as combustible fuses and therefore be a construction violation...

Nothing official here, but I believe what we are looking at is actual fuse. Much of that stuff contains gun powder or other chemicals that can potentially be hazardous. I have judged many Missions this year that burned a length of cotton string, and in my book that would be perfectly ok.

I'm struggling. On the one hand, the clarification says "Furthermore, the flame should burn out quickly, not produce any additional flames, and produce a limited amount of smoke." I don't know if a timer intended to take significant time would qualify. On the other hand, it does specifically describe prohibited materials as "Fuel sources such as flammable liquids or gases, chemicals such as magnesium ribbon, and compounds such as gunpowder..." Since a simple string is not on that list, would that be allowed?

This reminds me of something I asked back in the chemical clock forum. I was talking about using these incense sticks that don't really have a fire but burn on the inside. They are hot enough to ignite a match when the burning part gets to the matchhead.

I think I'm going to decide not to risk using this because of the potential of a violation. Also, the only way to adjust the timer is by changing the distance between the ignition point, and trigger point, which imo is physical, since you're not changing the amount of something, or the concentration of something.

[ScottMaurer19]

Nothing official here, but I believe what we are looking at is actual fuse. Much of that stuff contains gun powder or other chemicals that can potentially be hazardous. I have judged many Missions this year that burned a length of cotton string, and in my book that would be perfectly ok.

I'm struggling. On the one hand, the clarification says "Furthermore, the flame should burn out quickly, not produce any additional flames, and produce a limited amount of smoke." I don't know if a timer intended to take significant time would qualify. On the other hand, it does specifically describe prohibited materials as "Fuel sources such as flammable liquids or gases, chemicals such as magnesium ribbon, and compounds such as gunpowder..." Since a simple string is not on that list, would that be allowed?

This reminds me of something I asked back in the chemical clock forum. I was talking about using these incense sticks that don't really have a fire but burn on the inside. They are hot enough to ignite a match when the burning part gets to the matchhead.

I think I'm going to decide not to risk using this because of the potential of a violation. Also, the only way to adjust the timer is by changing the distance between the ignition point, and trigger point, which imo is physical, since you're not changing the amount of something, or the concentration of something.

It works until states when you have to explain how you ADJUST the time. Otherwise it's just a chemical timer that "isn't" adjustable

[dmis]

I think I'm going to decide not to risk using this because of the potential of a violation. Also, the only way to adjust the timer is by changing the distance between the ignition point, and trigger point, which imo is physical, since you're not changing the amount of something, or the concentration of something.

Kerosene? Or dampen the string with water to slow it down? Seriously though, perhaps changing the type of string. It also does not say the adjustment to the chemical timer had to be chemical (I think). But you may not want to go this route because of the ambiguity.

[idontknowanything]

I'm struggling. On the one hand, the clarification says "Furthermore, the flame should burn out quickly, not produce any additional flames, and produce a limited amount of smoke." I don't know if a timer intended to take significant time would qualify. On the other hand, it does specifically describe prohibited materials as "Fuel sources such as flammable liquids or gases, chemicals such as magnesium ribbon, and compounds such as gunpowder..." Since a simple string is not on that list, would that be allowed?

This reminds me of something I asked back in the chemical clock forum. I was talking about using these incense sticks that don't really have a fire but burn on the inside. They are hot enough to ignite a match when the burning part gets to the matchhead.

I think I'm going to decide not to risk using this because of the potential of a violation. Also, the only way to adjust the timer is by changing the distance between the ignition point, and trigger point, which imo is physical, since you're not changing the amount of something, or the concentration of something.

It works until states when you have to explain how you ADJUST the time. Otherwise it's just a chemical timer that "isn't" adjustable

Adjusting the amount that is burnt would still be a way to adjust the timer then. It's not technically physical since you're increasing or decreasing the amount that needs to be combusted for the chemical reaction (or just cut the stick instead of moving the ignition point). Besides, you only need to explain how to adjust timer instead of actually adjusting it right? That means, based off of the rules, it's better to just have it consistently operate around 3 minutes instead of changing it to the intended time.

[ScottMaurer19]

This reminds me of something I asked back in the chemical clock forum. I was talking about using these incense sticks that don't really have a fire but burn on the inside. They are hot enough to ignite a match when the burning part gets to the matchhead.

I think I'm going to decide not to risk using this because of the potential of a violation. Also, the only way to adjust the timer is by changing the distance between the ignition point, and trigger point, which imo is physical, since you're not changing the amount of something, or the concentration of something.

It works until states when you have to explain how you ADJUST the time. Otherwise it's just a chemical timer that "isn't" adjustable

Adjusting the amount that is burnt would still be a way to adjust the timer then. It's not technically physical since you're increasing or decreasing the amount that needs to be combusted for the chemical reaction (or just cut the stick instead of moving the ignition point). Besides, you only need to explain how to adjust timer instead of actually adjusting it right? That means, based off of the rules, it's better to just have it consistently operate around 3 minutes instead of changing it to the intended time.

Based on the FAQ the rate of reaction needs to change and not the physical length of the fuse.
I'm not sure how you'd explain to an ES how you planned to increase or decrease the rate of reaction whether or not you actually do.

[PM2017]

It works until states when you have to explain how you ADJUST the time. Otherwise it's just a chemical timer that "isn't" adjustable

Adjusting the amount that is burnt would still be a way to adjust the timer then. It's not technically physical since you're increasing or decreasing the amount that needs to be combusted for the chemical reaction (or just cut the stick instead of moving the ignition point). Besides, you only need to explain how to adjust timer instead of actually adjusting it right? That means, based off of the rules, it's better to just have it consistently operate around 3 minutes instead of changing it to the intended time.

Based on the FAQ the rate of reaction needs to change and not the physical length of the fuse.
I'm not sure how you'd explain to an ES how you planned to increase or decrease the rate of reaction whether or not you actually do.

This is what I meant earlier when I said changing distance is physical.

[idontknowanything]

Adjusting the amount that is burnt would still be a way to adjust the timer then. It's not technically physical since you're increasing or decreasing the amount that needs to be combusted for the chemical reaction (or just cut the stick instead of moving the ignition point). Besides, you only need to explain how to adjust timer instead of actually adjusting it right? That means, based off of the rules, it's better to just have it consistently operate around 3 minutes instead of changing it to the intended time.

Based on the FAQ the rate of reaction needs to change and not the physical length of the fuse.
I'm not sure how you'd explain to an ES how you planned to increase or decrease the rate of reaction whether or not you actually do.

This is what I meant earlier when I said changing distance is physical.

Putting the incense in a tube and spritzing it with water will decrease the rate of combustion. Or even have holes in the tube holding the incense, and cover up holes to decrease the amount of oxygen the stick is receiving will slow it down as well.

[Alex-RCHS]

I apologize if this has already been answered, but is using a typical sound card or sound device with a small battery in it a violation of the “having only one battery” bonus?

If so, how does one get around this?

[PM2017]

I apologize if this has already been answered, but is using a typical sound card or sound device with a small battery in it a violation of the “having only one battery” bonus?

If so, how does one get around this?

We have a working method but its ridiculous expensive (think 1+ dollar per ten points from final task)

we have this: https://www.amazon.com/gp/product/B01BM ... UTF8&psc=1, as well as https://www.amazon.com/Audio-Developmen ... VBR66Q1FCC. You also need to attach an 8 ohm speaker, which I happened to find lying around at home. All in all its quite expensive, and the total price is increased by another 6-7 dollars since i bought it, so it may no longer be feasible.

Good luck!