Four weeks from now, we’ll be sitting in our hotel in Kansas after the first day of competition.
Today, we were frantically trying to finish final construction. Fortunately, stress seems to improve our productivity! Look at all the laser cutting!
Tomorrow we should have cool pictures of our actual planes, but right now they’re in a bunch of pieces because everything needs to fit under two three by five tables at the end of the day, which was especially hard today. Productivity is messy.
In other words: T SHIRTS ARE HERE.
They’re cool. Also, remember our cult like motto?
BAM. We’re pleased with ourselves. Hopefully we will be equally pleased with ourselves tomorrow when we’ve finished our planes. Wish us luck!
Strictly speaking, we’ve drunk the Gatorade, but with our new motto of “Semper Fly”, we’ve been accused of becoming a cult (Semi-Latin evidently equates to cult). Anyway, here is our old friend the Gatorade bottle, which has been faithfully serving our club since we found out about this year’s challenge in September. Unfortunately, it suffered damage in our series of drop tests (see last post for exciting videos!). We thus drank it in celebration of our completion of the report ( #Reportarama2016 ), and will replace it with a newer model shortly. We are also pleased to note that no one got food poisoning from drinking six-month old Gatorade.
Either way, having now finished our report, we will spend the rest of our year till competition in construction. So far, good progress has been made- both fuselages are complete, as well as one set of wings. With any luck, all prototype construction will be complete by next weekend, and we’ll start flying things around (which will mean more exciting videos!). Until then, please enjoy some mid-construction pictures of our prototype.
We said we would be more active on this blog this year. We lied. Thus, we will now try to win you love back with a cool video! (At the end of this post. It needs some context).
First, an update on last semester:
This year, the rules of competition changed slightly: in order to compete, a team had to submit a proposal by December 12th. This accelerated our conceptual design phase considerably. To prove this, here are some lovely conceptual images of our two planes:
Aren’t they pretty? Evidently competition agrees with us, because they accepted our proposal and invited us to compete! SUCCESS.
That brings us to today. The Gatorade Plane’s landing gear (as pictured above) was planned to go over the top of the plane. This requires us to manufacture it ourselves, which we’ve realized we might not exactly have the equipment for. Therefore, we thought we should give a different landing gear scheme a try, and test its viability by doing a drop test.
For anyone who hasn’t done a drop test before, its exactly what it sounds like: you load up your plane, drop it, and see what happens. In our case:
So maybe it didn’t exactly go well. That being said, we dropped the plane from 4 ft, equating to a speed of roughly 11 mph on impact. The height we should have dropped the plane from to meet the design impact speed for landing gear from the Code of Federal Regulations? 9 inches.
Lesson: we’re being a little excessive with our overachieving. We also may need to look into laterally bracing our structures. Tomorrow, we shall attempt the test from a more reasonable height. Update you then!
Hello airplane enthusiasts and welcome to the 2015-2016 Season! Now that we’ve reclaimed access to our blog, we should become much more active.
Anyway, this year’s season is now in full swing. We have a new executive board, new members, and a brand new challenge. This year’s challenge requires the use of two planes, one called the production plane, which carries a 32 oz. Gatorade bottle. The other plane then carries the production plane broken down into various sub-assemblies. This should be a good challenge, and we’re really excited to see what we wind up doing. Hopefully you, our readers, are as well.
Some of you loyal followers may have noticed our complete lack of activity for the 2014-2015 Season. My only excuse is that we were all too afraid to follow the mastery of our former blog runner after he graduated (and might have had issue finding the blog’s permissions). Anyway, here’s what you missed on Columbia AIAA:
The 2014-2015 challenge was to construct a plane capable of carrying a 4″ x 5″ x 10″ block which weighed 5 lbs, and also capable of carrying wiffleballs, which were to be dropped off of the plane in a given zone, one per lap (this action, obviously, bears no resemblance to dropping bombs).
After a lot of consideration, we decided to design our plane to only carry one wiffleball, both because it would make flying the third mission easier (only one lap!) and because how quickly we could load and unload the block and wiffleballs was a multiplier on the rest of our score.
Also in an attempt to reduce our loading time, we decided to have a removable nose cone. That prevented our usual single motor design, so we had dual motors on the plane instead.
After some testing and crashing in which we learned, among other things, that certain members of our team should not be allowed to video flight attempts, our plane was declared ready for competition. We shipped it out and flew to Tuscon, Arizona to compete.
At competition in Tuscon, we had some issues, centrally the continued desire of our landing gear to part with the rest of the plane. After a lot of rapid repair and four flight attempts, we made it through the first mission! Despite never getting through the second (to fix our landing gear problem, we made the plane too heavy to take off in the required distance), we had a loading time of 16 seconds, which gave us a good enough multiplier to take 37th out of the 81 teams. Success!
The club delved too greedily and too deep. You know what they awoke in the darkness of the Activities Board at Columbia… a terror of shadow and flame. We found our club constitution! Apparently we have been operating for the last several years while totally unaware of the rules governing our own existence.
Naturally, they are full of amusing typos and exploitable loopholes. It will be an instructive exercise to highlight these issues, in preparation for our club’s drafting of a new constitution next week (with a top-notch spell checker). Formatting and errors are preserved in the excerpts below, with the addition of angry red text comments for the reader’s amusement.
Article I – Section 1. The name of this organization shall be Columbia Chapter of the American Institute for Aeronautics and Astronautics hereafter referred to as AIAA. (I like to believe that the full name of the organization actually includes “hereafter referred to as AIAA” because there are no quotation marks to indicate otherwise.)
Article I – Section 2. The officers of President, Vice President, and Treasure (Treasure? TREASURE?!?) shall make up the executive board of AIAA, hereafter referred to as the ‘Board’. A secretary may also serve when such interest exists.
The President has this to say about the Treasure position: It has been drawn to my attention that we currently have NO CLUB TREASURE, which is in violation of our current club articles. The club Treasure has no actual duties or powers mentioned in this constitution, but is apparently vital.
Since the only other mention of requirements for Club Treasure is that they must 1. be a member and 2. be an undergraduate student in CC or SEAS, I will award until such time as the position is abolished or elections are held the position of Treasure to the first person meeting those requirements who calls dibs.
I called dibs. I am now the club Treasure.
Article II – Section 2. The Board shall be charged with the responsibility of defining the annual goals of the organization (We’ve never actually done this.) and with acting responsibly (LOL) in pursuit of these goals.
Article IV – Section 2. The President has the ultimate authority over the meetings. However, as the group is really a team, that aspect must be honored.
This is the sort of ambiguity that leads to common law, and lawyers having to memorize previous cases to know how future disputes will be ruled by judges. I like it!
Article V – Section 1. Officers shall be nominated by the outgoing members molding the [positions on the Board. Nominees must be confirmed by a majority of the current members. (This bracket is never closed. Therefore, the entire rest of the constitution is technically part of Article V, Section 1.)
Article V – Section 2. Only members who are undergraduate students in Columbia College or the Fu Foundation School of Engineering and Applied Science may hold the position of President or Treasure. (Sorry Barnard and GS students. And maybe Treasure isn’t a typo after all…?) No single member may be BOTH the president and the treasure (GAH!) simultaneously.
Notice there is no restriction on being President and Vice President simultaneously. If the President is impeached, he can simply replace himself and then re-appoint himself as Vice President.
Article VI – Section 1. By-Laws of the organization shall be established and altered by unanimous decisions by the Board and a 3-5 vote by the upperclassmen.
Until this evening, our President was the entire Board, and thus wielded dictatorial power. However, after I called dibs (see above) I, in my official though poorly defined capacity as Treasure of the team, have the chance to veto all of his decisions before they come to a general vote. Truly, the Treasure wields considerable power.
Article VI – Section 2. By-Laws of the Board shall be established and altered by unanimous decision of the upperclassmen in the club.
Yes, the upperclassmen of the club can make the rules the board has to follow without the board having any say in the matter.
I have resorted to aerospace engineering/British pop music crossover puns. Is nothing sacred?
First, you should watch this hysterical video of the disastrous first flight of our prototype plane. We were young and foolish then. [vimeo]http://vimeo.com/91930363[/vimeo]
Seriously, we have come a long way this year. The final results are still being tabulated, but we expect to be 17th out of over 80 teams. This is a good 25+ places higher than last year. Considering that many of the other teams come from large engineering schools with actual aerospace departments, we are extremely happy with our improvement.
We met two, three, even four times a week all year. Rain or shine, midterms or Mondays, we worked anyway. The effort paid off, because our plane stood its ground against fearsome winds for all of its missions and came back for more. It was a bit on the heavy side, but that worked in our favor to keep it steady during rough conditions. Our brand new motor, supplied with 450+ W, had power in spades. Although its structural integrity was never tested by a crash or even a rough landing, we were very confident in our fuselage’s construction–a plywood frame with carbon fiber reinforcements in key areas.
All three flight tasks and the ground taxi mission were completed without a single crash. The only repair we ever made was straightening out the rear landing gear after it bent. Our equipment worked so well, in fact, we found ourselves lending our transmitter to other teams, helping a rookie UC Berkeley team with their plane (THEY COMPLETED MISSIONS THEIR FIRST YEAR WOO CONGRATS), and passing out spare parts when needed.
That was probably my favorite part of the event, that it was more of an exhibition than a competition. It was a great chance to see teams of young engineers from around the world take different approaches to the same problems, and share solutions freely to help each other improve. Everyone wanted everyone to do well. Combine this with AIAA’s great organization of the event (now in its 18th year, so they’ve had some practice!), and we all had a tremendous weekend.
Summary: LIKE A BOSS
I’ve tried to avoid talking about myself too much on this blog, but I’m about to graduate and have to leave this team FOREVER AND EVER and I’m glad to be doing so on a high note. Two years ago, we didn’t even get to fly because of a tornado warning.
Side note, have another amusing video, this time of our foam practice plane being blown away in the windstorm that year:
Last year, we flew twice, but with serious electrical problems that caused devastating crashes. Ultimately our plane was too badly mangled to try flying on the last day. This year, we didn’t have to put a single screw back in place (although we did get lost trying to drive half a mile from Chipotle to our hotel). And I couldn’t be more proud of all our progress.
Today is the last day of the competition, and therefore the last day of BLOGSPAM 2014. I will try to keep you updated here as we attempt our final mission and wrap up events here.
The ground taxi and first two flight missions were perilous, nerve-wracking affairs. This morning, while awaiting our third mission slot, we watched the rainclouds slowly roll in, painting the sky in somber gray.
The wind, of course, continued. Several planes met unfortunate ends, tumbling from funereal skies to a tarmac coffin.
Ours, however, was unfazed. With the steady grace of a seasoned veteran, it took wing against the wind. This mission called for three laps with the same weight as the last, but in a new configuration.
One. An easy lap, sweeping smoothly through each turn.
Two. More difficult. A gust lifted the nose to vertical, but our pilot turned the flip into a loop and continued on.
Three. A struggle forward, as rain began to spritz the crowd. Finally, time to land, a few short seconds more difficult than the previous minutes of flight combined.
Our first pass was spoiled by a sudden crosswind that threatened a rollover. We doubled back, for a second run. There was no need for a third.
Still the wind blew, and still we defied it. We changed to a new propeller and ensured the batteries were bursting, as we might need to wring every Coulomb of charge from them. The mission was simple, to fly three laps around the runway, but with the cargo bay full of wooden blocks. A further challenge–assemble the cargo and the plane within five minutes.
Xavier and Veronica did so with time to spare. But the plane was not to be outdone, soaring through the mission in less time than it took to assemble. Which is not to say that the fearsome winds gave up and let that happen. We took in a deep breath, and held it in anticipation.
The wind rustled. The propeller answered with a growl. The wheels rattled, bounced, and finally lifted. Tarmac waited patiently for one false move, ready to dash the frame to pieces if given the chance.
Being loaded to capacity meant greater stability, and the wings did not wobble as much as they had in the last trial. But, the challenge was to do three laps, and we had only done two in the last mission. Worse, our motor struggled to carry on, pulling forward only just faster than the winds were pushing back. Only just, but just enough.
The turns were easier, with with less fear of rolling over. The trip back, with the wind at our backs, was again the easiest leg of every lap. And again, it was landing that put gray hairs on all our heads.
Have you ever seen a propeller plane hover when flying against headwind? There is something inherently wrong about the sight. It seemed suspended, like a cartoon character that hasn’t looked down yet after walking off a cliff. Then it fell, too fast! But wait, the pilot jammed the flaperons just in time, and the plane squeaked away from a hard landing. Only now it was careening forward, inches above the tarmac.
Finally, a landing. Wheels scrabbled, rattled, and swerved. The rudder made a few final twitches as it guided the plane to rest in safety. The team collectively exhaled, not sure if we had breathed at all in the intervening four minutes. Yes, the mission was over in less time than it took to assemble the plane.
Tomorrow, once more unto the breach. We should have videos of our flights up soon as well.