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-   -   Team 665 Fan/s and More (http://www.chiefdelphi.com/forums/showthread.php?t=73389)

martin417 17-03-2009 10:14

Re: Team 665 Fan/s and More
 
Quote:

Originally Posted by boomergeek (Post 837207)
We did try to understand the paper

The paper isn't terribly clear, but we concentrated on a few graphs, mainly the T/Tu graph and T/inlet Radius. We made the inlet radius 1.5, giving us a 13" diameter inlet (we went big because we knew we would be obstructing it some with guards) we used a 1" straight section where the prop runs, and about 4" of 7° angled outlet. We had to cut off some of the outlet to get it fit, but as I said, it didn't seem to affect the thrust. The straight section was a little less than 10" so we spun up the prop and touched it with a large flat file to get tip clearance (you want the tip to be as close as possible to the shroud, be very careful here! use safety shields and go slowly!)

here are some pictures of the finished product:

Shroud

Mounted to bot

boomergeek 29-03-2009 10:50

Re: Team 665 Fan/s and More
 
The shroud based on the NACA report worked great for us.
Special thank you to Martin417 of team 1771 for advising us with the finer points to get it right. We also added a twist to the whole fan concept by putting a pair of fans on a turret. By the end of our matches at the Connecticut Regional, our drivers and copilots were doing amazing coordinated maneuvers that had the announcing play-by-play guy very impressed. The vectored thrust from the fans was really a fun innovation: I just wish we had more time to practice with it.




If we could start over with this game, I would suggest, all that is needed is a turreted stack of properly shrouded fans on top of any four wheel drive system. Then simply push and pin the best robot on the other alliance sequentially in front of each of the three human alliance shooters.

I think an alliance of 3 turreted stack of fans bots would humiliate any alliance of offense-based robots. The offensive based bots might be able to score their first 7 balls, but they would be incapable stopping the turreted fan bots from quickly pushing them to the fan bots human shooters and then the fan bots could easily hold them there for the full match.

martin417 29-03-2009 12:06

Re: Team 665 Fan/s and More
 
Kudos on a beautiful implementation and a neat "twist" on the fan idea! Are you going to the championships? If so, I will definitely come by and take a look in person.

boomergeek 29-03-2009 14:00

Re: Team 665 Fan/s and More
 
Quote:

Originally Posted by martin417 (Post 842308)
Kudos on a beautiful implementation and a neat "twist" on the fan idea! Are you going to the championships? If so, I will definitely come by and take a look in person.

We would love to be making plans to go to the championships this year, but its not in the cards. Too many excellent robots: three heartbreak losses at the buzzer; (But our hearts mended quickly and we were all dancing in the stands and using giant letters to spell out cheers for the remaining teams.)

It was my first year involved and I really came away impressed with the generosity and talent of the students, mentors and volunteers.

I hope to be involved for many years to come.

Our team got to go to the championships last year and we'll start working on the goal of getting back there next year.

Thanks again and good luck at the championships.


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