Duration

[danyalukin]

Since SciO is about creative thinking and discovery, I wont post pictures until after nationals. Coming up with a design was extremely fun for me, and I dont want to deprive others from a chance to do the same as opposed to just trying to copy. If I post pictures, I would really ruin the fun. Besides, even if those who try to use my designs medal or something, how much pride would they take in a medal? Not much, which really destroys the points.

Bottom line... I will post pictures, but after a fair, untainted competition in Orlando

I hope my thinking makes sense.

~Danyalukin

[mrsteven]

oh definitely, this is what I meant. I totally agree with you I was a little touchy about mine as well

[danyalukin]

I'm not touchy at all. I dont feel like sharing my ideas would affect me in a ny negative way. More for the sake of keeping things fun, clean, and competitive! mrsteven, are you going to nats?

[mrsteven]

I'm not touchy at all. I dont feel like sharing my ideas would affect me in a ny negative way. More for the sake of keeping things fun, clean, and competitive! mrsteven, are you going to nats?

I am not... *sigh* although my team did not qualify, I went last year to U Mad to see the campus and watch the helicopter flights (which I have a sheet somewhere with all the times because I watched nearly all of them... cannot find it now its bothering me...)
I would go this year but I'm from Chicago... and its in Florida... not really realistic to go down for a day and come back up

I'd like to know the top bundle of times though. I want to gauge myself to the best teams in the nation to see how I measure up. And designs, those are always fascinating to see what others did in response to the same problem

[danyalukin]

I might know some people who will be timing, could ask them for their data... What are your duration expectations, given a 20ft gym, per say?

[mrsteven]

I might know some people who will be timing, could ask them for their data... What are your duration expectations, given a 20ft gym, per say?

mhm.
This is an interesting idea. I'm going to start with a couple of things before I go into it. First, that I don't know anyone elses designs for chinooks. I have seen only my own and in IL there weren't any others except for mine. With that, I have no data or concept of how others' work or how well the average person with a working chinook has gotten it to.
With that, some of you have posted about some good times- the CA 2:30ish times and your 2:40ish time.
With this, I think I'll amend my prior guess of 2:40 being king pin to now ~3:00 pre bonus king pin. I think 20 seconds additional plus maybe some other team not on the forums with an extraordinary one to come in. Or simply improvement on your own 2:40 + descent time.

I'd really like to see that data.

Also, if the ceiling is bad (I don't know where its at exactly) I'm dropping that time back to 2:50. I know my design in a bad ceiling its a sure fire stuck situation, and I think many many of you are in the same hole I'd be in, and the unlucky of you won't get the descent time at all (or even total ascent time if you karma stinks)

god this is crazy. Last year the idea of a 3:00 helicopter COAXEL was insane ( I seem to remember 1 close to that at nats) now we're on the chinook thing, gosh how this escalates from year to year.

Thoughts from me... And I'm a little obsessed with helicopters... I'm now working on building f1d planes because I have all this knowledge about this sort of stuff, may as well improve on it and do some indoor free flight competitions. Wish we had wright stuff around...

[danyalukin]

god this is crazy. Last year the idea of a 3:00 helicopter COAXEL was insane ( I seem to remember 1 close to that at nats) now we're on the chinook thing, gosh how this escalates from year to year.

In terms of physics and assuming a heli is stable, a 4 gram 40 cm coaxial has little advantage over a 3.5g, 35cm chinook. That is, if we neglect the difficulty of construction. In other words, in a perfect world of physics, a chinook and a coaxial are identical and have no innate disadvantages over each other!
So.. a 3 minute chinook is definitely plausible.

[mrsteven]

god this is crazy. Last year the idea of a 3:00 helicopter COAXEL was insane ( I seem to remember 1 close to that at nats) now we're on the chinook thing, gosh how this escalates from year to year.

In terms of physics and assuming a heli is stable, a 4 gram 40 cm coaxial has little advantage over a 3.5g, 35cm chinook. That is, if we neglect the difficulty of construction. In other words, in a perfect world of physics, a chinook and a coaxial are identical and have no innate disadvantages over each other!
So.. a 3 minute chinook is definitely plausible.

Do you actually know that mathematically, or are you just assuming that with the scale factor, because I would think the 1/2 gram difference over a 5 cm difference in extra surface area is a much larger contender.
and thats assuming stability. I think what it comes down to the possibility is the freedom to use any mass of motor. I think that really is what made these flights possible. The extra freedom with that I think allows for more overkill designs to consume winds and still have more coming. Like I used well over the 2 grams from last year for my design this one, I think this is what it boils down to

[danyalukin]

I do know this mathematically. But here is to the cieling at nationals:

http://www.scienceolympiad2012.com/wp-c ... enue-2.jpg

Really?

[mrsteven]

.... why not just fly outside while we're at it? I do not understand the people who choose where they hold helicopters... not one bit...

mhm interesting. I'll have to do the calculations, I just inferred...