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by Ash123
January 26th, 2018, 8:14 pm
Forum: Mission Possible C
Topic: Mission Possible C
Replies: 505
Views: 49522

Re: Mission Possible C

Is A timing step required? In one section of the rules it says you need t but in another it says it’s just for bonus points. What is the minimum time it needs to run, if required? I remember someone said they only included the start and final action and still competed with that.
by Ash123
January 24th, 2018, 10:41 pm
Forum: Mission Possible C
Topic: Mission Possible C
Replies: 505
Views: 49522

Re: Mission Possible C

Hey guys Question: I’m using my pulley to complete a circuit by having one end of it lift up a metal mass to an uncomplete circuit and having the mass touch the wires. My question is, as long as I use a simple D-Cell or 9V battery, is this allowed? I’d be using solid core, 18 gauge copper wiring, an...
by Ash123
January 23rd, 2018, 8:00 am
Forum: Mission Possible C
Topic: Electromagnet Task
Replies: 28
Views: 3437

Re: Electromagnet Task

Would using a solenoid no longer count the electromagnet as “student-made”?
by Ash123
January 21st, 2018, 2:35 pm
Forum: Mission Possible C
Topic: Mission Possible C
Replies: 505
Views: 49522

Re: Mission Possible C

Would a push button switch be counted as a spring timer? I’m not using the switch to power a circuit- just to complete one.
by Ash123
January 21st, 2018, 2:20 pm
Forum: 2018 Lab Events
Topic: Hovercraft B/C
Replies: 627
Views: 59681

Re: Hovercraft B/C

I have no problem at all lifting a 2+kg craft with no skirt. The skirt is only required for uneven surfaces, and I doubt any floors could be as disastrous as plywood tables. Skirts certainly improve performance, but it is most likely a weak lift fan. I cannot stress it enough, get a fan that could ...
by Ash123
January 20th, 2018, 4:33 pm
Forum: Mission Possible C
Topic: Chemical Clocks
Replies: 89
Views: 9204

Re: Chemical Clocks

I’m sorry, but please clarify this for me because I thought I saw this in the rules but now I can’t find it- are we required to have some type of timer? Or isn’t it just for bonus points? Will we be penalized in any way for not having a timer?
by Ash123
January 20th, 2018, 4:25 pm
Forum: Mission Possible C
Topic: Balloon Task
Replies: 45
Views: 6127

Re: Balloon Task

Would burning a match in a lab beaker with the ballon covering the opening result in the balloon inflating? I ask because if I use extra long matches, I can use the idea as my chemical timer.
by Ash123
January 20th, 2018, 4:04 pm
Forum: Mission Possible C
Topic: Electromagnet Task
Replies: 28
Views: 3437

Re: Electromagnet Task

are we allowed to use a solenoid in our electromagnet? Or is that not technically a student made electromagnet anymore?
by Ash123
January 17th, 2018, 9:11 pm
Forum: 2018 Lab Events
Topic: Hovercraft B/C
Replies: 627
Views: 59681

Re: Hovercraft B/C

he probably meant 1.2V 250 mah Yes I did, my bad. Thank you for catching that. 4 1.2 V batteries in series would be 4.8 V total. I think you'd need more to power most fans rated at 12 V. In my experience, you usually need 6-7 V at minimum, and around 8-9ish V to have the fans be effective. If you g...
by Ash123
January 17th, 2018, 5:04 pm
Forum: 2018 Lab Events
Topic: Hovercraft B/C
Replies: 627
Views: 59681

Re: Hovercraft B/C

shrewdPanther46 wrote:he probably meant 1.2V 250 mah

Yes I did, my bad. Thank you for catching that.
by Ash123
January 17th, 2018, 5:03 pm
Forum: 2018 Lab Events
Topic: Hovercraft B/C
Replies: 627
Views: 59681

Re: Hovercraft B/C

Do you guys think that four 9v NiMh 250 mAh Batteries in series would be enough to power a lift fan that’s 12v and runs off of 0.1 A? I thought about this instead of a battery pack because it would be less mass. Would it be enough current and voltage to possible lift a large number of rolls? You ar...
by Ash123
January 16th, 2018, 7:12 pm
Forum: 2018 Lab Events
Topic: Hovercraft B/C
Replies: 627
Views: 59681

Re: Hovercraft B/C

Do you guys think that four 9v NiMh 250 mAh Batteries in series would be enough to power a lift fan that’s 12v and runs off of 0.1 A? I thought about this instead of a battery pack because it would be less mass. Would it be enough current and voltage to possible lift a large number of rolls?
by Ash123
January 16th, 2018, 4:01 pm
Forum: Mission Possible C
Topic: Mission Possible C
Replies: 505
Views: 49522

Re: Mission Possible C

I'm not entirely sure your question. I think the gist of the timer task is you can designate a single task in your device (which can be a scorable action, or something that does not score but is not a violation by being parallel or dead end) to receive bonus points as a timer. The task cannot be po...
by Ash123
January 15th, 2018, 8:46 pm
Forum: Helicopters C
Topic: Chinook Chat!
Replies: 52
Views: 5064

Re: Chinook Chat!

Ash, See Jeff Anderson’s post on page 7 of the “Helicopters C” thread in this wiki. He posted several links to standard helicopter plans. One of these plans should answer your question. Brian T Oh ok that definitely helps! One thing I still don’t understand though- How can the rotors be built so yo...
by Ash123
January 15th, 2018, 6:48 pm
Forum: Helicopters C
Topic: Chinook Chat!
Replies: 52
Views: 5064

Re: Chinook Chat!

Hey guys Can someone explain how to build the rotors? I don’t understand how you can create a pitch if they are just two sticks. Also, what is the material used to cover them? Is it wax paper? Mylar is used to cover the rotors and the two main spars are offset vertically and radially then connected...

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