From cmatt at MIT.EDU Mon Mar 1 16:32:50 2004 From: cmatt at MIT.EDU (cmatt@MIT.EDU) Date: Mon, 1 Mar 2004 16:32:50 -0500 Subject: [Unified-mailman] Phi Cup Fees Message-ID: <1078176770.4043ac021bb9e@webmail.mit.edu> Team, Please bring in your $7.50 (not $15 due to a donation by the unified department) to Howie as soon as possible. Remember, Friday 7 PM. Be There. Go Unified! Chris From chipd at MIT.EDU Mon Mar 1 17:07:47 2004 From: chipd at MIT.EDU (Carl Dietrich) Date: Mon, 1 Mar 2004 17:07:47 -0500 Subject: [Unified-mailman] lecture switch Message-ID: The Wed 9am fluids lecture will be switched with the Thursday 1pm systems lecture this week due to travel constraints. -Carl ___________________________________________________________ Carl Dietrich MIT Rocket Team Unified Engineering Graduate TA MIT Department of Aeronautics and Astronautics Office: 33-104 Phone: 617-253-2274 ___________________________________________________________ From howiek at MIT.EDU Mon Mar 1 20:52:48 2004 From: howiek at MIT.EDU (Howard Kleinwaks) Date: Mon, 01 Mar 2004 20:52:48 -0500 Subject: [Unified-mailman] flying tomorrow morning Message-ID: <5.2.1.1.2.20040301205209.00b40560@po14.mit.edu> Students, The trainers will be leaving the Gelb lab tomorrow for Johnson between 7:30 and 7:45. -Howie From ccoleman at MIT.EDU Tue Mar 2 14:38:55 2004 From: ccoleman at MIT.EDU (Charles P Coleman) Date: Tue, 2 Mar 2004 14:38:55 -0500 Subject: [Unified-mailman] Reading for SP Lecture Message-ID: Class- Prof Seering's article, "Redefining Engineering", which is posted in the handout column of the system problem course page (http://web.mit.edu/16.unified/www/SPRING/systems/Spring2004/SP4/Redefining_ Engineering.pdf) is required reading for tomorrow's lecture. Best- Charles -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mailman.mit.edu/pipermail/unified-mailman/attachments/20040302/79256add/attachment.htm From drela at MIT.EDU Wed Mar 3 09:49:12 2004 From: drela at MIT.EDU (Mark Drela) Date: Wed, 03 Mar 2004 09:49:12 -0500 Subject: [Unified-mailman] Re: In-Reply-To: Your message of "Wed, 03 Mar 2004 00:46:06 EST." <5.1.0.14.2.20040303004544.02156c38@hesiod> Message-ID: <200403031449.i23EnCTm016164@orville.mit.edu> >can we just do one speed instead of three..or at least just one way up for >each speed? the amount of data we're processing is huge!!!! It's fine if the members of your lab team split up the data reduction work and then share it. But everyone must reduce SOME of the data, since it's an important learning exercise. Use the spreadsheet features as much as possible. The same matrix-multiply operations will apply to all data rows, so the same three formulas for Fx,Fy,Mz, copied appropriately, will process all average data rows. The Xess/Excel averaging function ignores blank entries. So if you set it up to avarage some generous (say 20) number of rows for each alpha,V pair, then it will give the right average if you have fewer rows in the target range. MD From chipd at MIT.EDU Wed Mar 3 13:45:00 2004 From: chipd at MIT.EDU (Carl Dietrich) Date: Wed, 3 Mar 2004 13:45:00 -0500 Subject: [Unified-mailman] Important Lab data reduction update Message-ID: Students, The raw data (forces and moments in volts) should be modified by subtracting the zero values from the load cell PRIOR to multiplying by the conversion matrices. For those groups (probably most of you) who do not have zero values (data from when the tunnel velocity = 0 mph) you can download the offsets from the web at http://web.mit.edu/16.unified/www/SPRING/systems/Spring2004/cal_run.xls Again, subtraction of the zero value should be done before either of the matrix multiplications. Please let me know if any of you still have difficulty getting reasonable Lifts & Drags. -Carl ___________________________________________________________ Carl Dietrich MIT Rocket Team Unified Engineering Graduate TA MIT Department of Aeronautics and Astronautics Office: 33-104 Phone: 617-253-2274 ___________________________________________________________ From chipd at MIT.EDU Wed Mar 3 15:52:56 2004 From: chipd at MIT.EDU (Carl C Dietrich) Date: Wed, 03 Mar 2004 15:52:56 -0500 Subject: [Unified-mailman] Note on data reduction Message-ID: <200403032052.i23KquOW020926@unified-2.mit.edu> Be sure that you are careful about which column of raw data corresponds to which column of your calibration matrix. In your Excel file Pitch is the first moment column given, but the pitch corresponds to Mz which is the last column of your calibration matrix. This discrepancy can be compensated for by either switching the order of your data columns OR switching the columns in the calibration matrix (not both). For example, if you switch the columns of the calibration matrix, the first row of your calibration matrix should read: 1.7357 0.0094 0.0252 -0.0060 0.0962 -0.0402 Instead of 1.7357 0.0094 0.0252 -0.0402 -0.0060 0.0962 -Carl From howiek at MIT.EDU Wed Mar 3 17:05:00 2004 From: howiek at MIT.EDU (Howard Kleinwaks) Date: Wed, 3 Mar 2004 17:05:00 -0500 Subject: [Unified-mailman] flight training tomorrow or friday Message-ID: Students, If any of you are interesting in training tomorrow or friday mornings, please let me know. -Howie From howiek at MIT.EDU Wed Mar 3 20:52:35 2004 From: howiek at MIT.EDU (Howard Kleinwaks) Date: Wed, 03 Mar 2004 20:52:35 -0500 Subject: [Unified-mailman] flying tomorrow Message-ID: <5.2.1.1.2.20040303205209.00b5d8b0@po14.mit.edu> For those of you interested in flying tomorrow, meet at the Gelb Lab at 7:30 to leave by 7:40. -Howie From spearing at MIT.EDU Thu Mar 4 07:38:46 2004 From: spearing at MIT.EDU (Mark Spearing) Date: Thu, 4 Mar 2004 07:38:46 -0500 Subject: [Unified-mailman] M14 hints and M17 clarification Message-ID: Dear Unified Students A couple of hints to help with problem M14. 1) since we are in a small deflection regime we can superimpose the stresses due to the axial force with those due to the bending moment at a given point on the cross-section. 2) you can assume that the maximum bending moment occurs at the center of the beam (since this is where the maximum deflection arises). This will allow you to express the solution in terms of cos and sin terms which will simplify the solution considerably. The drawing in M17 contains a small "cut and paste" error. Sxy, the shear force per unit length should have been drawn as positive (i.e. the same convention as a positive shear stress). The table of values is correct.. My apologies for the error and I hope that the hint helps you. Regards Mark Spearing From chipd at MIT.EDU Thu Mar 4 08:16:18 2004 From: chipd at MIT.EDU (chipd@MIT.EDU) Date: Thu, 4 Mar 2004 08:16:18 -0500 Subject: [Unified-mailman] Fwd: Re: Note on data reduction Message-ID: <1078406178.40472c22728b1@webmail.mit.edu> Dear Students, If you are getting reasonable looking outputs from your data reduction, read no further and submit what you have. Quite a few of you have emailed me with concerns about the numbers that you are getting out of your data reduction. Firstly, do not panic. This is the first time that Professor Drela and I went through this lab, and clearly, there have been a number of changes over the past couple of days which ideally would not have happened as we saw the results of your data reduction. Howie and I will instruct the graders to take this into account. Secondly, please note that I messed up and sent out the wrong column switch example (see below), and thanks to Mike for picking up on my error. My apologies to those of you who just followed my example and still have bad-looking data. I hope that this will (finally) fix your problems. Again, sorry about the confusion that this must have caused. -Carl ----- Forwarded message from francis at MIT.EDU ----- Date: Wed, 3 Mar 2004 23:08:52 -0500 From: francis at MIT.EDU Reply-To: francis at MIT.EDU Subject: Re: Note on data reduction To: Carl C Dietrich Hey, maybe I'm reading this wrong, but if you wanted to fix it with your calibration matrix, shouldn't it be: 1.7357 0.0094 0.0252 0.0962 -0.0402 -0.0060 This corresponds to Fx Fy Fz Mz Mx My, which is lift drag sideforce pitch yaw roll, which is how it appears in the spreadsheet. Let me know if I'm doing this wrong. Mike francis Quoting Carl C Dietrich : > > Be sure that you are careful about which column of raw data > corresponds to which column of your calibration matrix. > > In your Excel file Pitch is the first moment column given, but the > pitch corresponds to Mz which is the last column of your calibration > matrix. This discrepancy can be compensated for by either switching > the order of your data columns OR switching the columns in the > calibration matrix (not both). For example, if you switch the columns > of the calibration matrix, the first row of your calibration matrix > should read: > > 1.7357 0.0094 0.0252 -0.0060 0.0962 -0.0402 > > Instead of > 1.7357 0.0094 0.0252 -0.0402 -0.0060 0.0962 > > > -Carl > ----- End forwarded message ----- From howiek at MIT.EDU Thu Mar 4 12:03:38 2004 From: howiek at MIT.EDU (Howard Kleinwaks) Date: Thu, 4 Mar 2004 12:03:38 -0500 Subject: [Unified-mailman] fluids concept questions on web Message-ID: Students, The PRS questions from lectuures F1-F10 are now on the fluids web site. -Howie From howiek at MIT.EDU Thu Mar 4 14:05:33 2004 From: howiek at MIT.EDU (Howard Kleinwaks) Date: Thu, 4 Mar 2004 14:05:33 -0500 Subject: [Unified-mailman] quiz tomorrow in WALKER Message-ID: The fluids quiz is in Walker. The fluids quiz is in Walker. The fluids quiz is in Walker. Also, you are allowed to bring in one 2-sided sheet of paper to the fluids quiz in Walker. Good luck tomorrow on your quiz in Walker. -Howie PS: The fluids quiz is in Walker. From howiek at MIT.EDU Thu Mar 4 14:20:26 2004 From: howiek at MIT.EDU (Howard Kleinwaks) Date: Thu, 4 Mar 2004 14:20:26 -0500 Subject: [Unified-mailman] Unified Phi Cup tomorrow Message-ID: Everyone should come and watch the unified Phi Cup team play tomorrow night at 7pm in the Johnson Ice Rink. Cheer us on to victory! -Howie (and the rest of the unified phi cup team) From howiek at MIT.EDU Thu Mar 4 22:03:54 2004 From: howiek at MIT.EDU (Howard Kleinwaks) Date: Thu, 04 Mar 2004 22:03:54 -0500 Subject: [Unified-mailman] Fwd: quiz tomorrow in WALKER Message-ID: <5.2.1.1.2.20040304220310.00b7d560@po14.mit.edu> In case you didn't catch it the first time, the fluids test is in WALKER. >X-Sieve: CMU Sieve 2.2 >Date: Thu, 4 Mar 2004 14:05:33 -0500 >To: unified at mit.edu >From: Howard Kleinwaks >Subject: quiz tomorrow in WALKER >X-Spam-Score: -10.2 >X-Spam-Flag: NO >X-Scanned-By: MIMEDefang 2.28 (www . roaringpenguin . com / mimedefang) > >The fluids quiz is in Walker. >The fluids quiz is in Walker. >The fluids quiz is in Walker. > >Also, you are allowed to bring in one 2-sided sheet of paper to the fluids >quiz in Walker. > >Good luck tomorrow on your quiz in Walker. >-Howie > >PS: The fluids quiz is in Walker. From chipd at MIT.EDU Fri Mar 5 07:48:00 2004 From: chipd at MIT.EDU (chipd@MIT.EDU) Date: Fri, 5 Mar 2004 07:48:00 -0500 Subject: [Unified-mailman] Fwd: Fwd: quiz TODAY in WALKER Message-ID: <1078490880.40487700c53f2@webmail.mit.edu> Don't forget to go to WALKER this morning for the fluids quiz! -Carl PS: W_LK_R PPS: If any of you had a female dog who was really good at fluid mechanics you might want to WALKER to the test this morning. ----- Forwarded message from Howard Kleinwaks ----- Date: Thu, 04 Mar 2004 22:03:54 -0500 From: Howard Kleinwaks Reply-To: Howard Kleinwaks Subject: Fwd: quiz tomorrow in WALKER To: unified at mit.edu In case you didn't catch it the first time, the fluids test is in WALKER. >X-Sieve: CMU Sieve 2.2 >Date: Thu, 4 Mar 2004 14:05:33 -0500 >To: unified at mit.edu >From: Howard Kleinwaks >Subject: quiz tomorrow in WALKER >X-Spam-Score: -10.2 >X-Spam-Flag: NO >X-Scanned-By: MIMEDefang 2.28 (www . roaringpenguin . com / mimedefang) > >The fluids quiz is in Walker. >The fluids quiz is in Walker. >The fluids quiz is in Walker. > >Also, you are allowed to bring in one 2-sided sheet of paper to the fluids >quiz in Walker. > >Good luck tomorrow on your quiz in Walker. >-Howie > >PS: The fluids quiz is in Walker. ----- End forwarded message ----- From howiek at MIT.EDU Sat Mar 6 12:19:24 2004 From: howiek at MIT.EDU (Howard Kleinwaks) Date: Sat, 06 Mar 2004 12:19:24 -0500 Subject: [Unified-mailman] flight training on monday Message-ID: <5.2.1.1.2.20040306121813.00b42a10@po14.mit.edu> Students, If any of you want to train on Monday (and remember that you need to be able to fly your plane this week for SP4), please let me know and I'll set it up. -Howie From howiek at MIT.EDU Sat Mar 6 14:32:57 2004 From: howiek at MIT.EDU (Howard Kleinwaks) Date: Sat, 06 Mar 2004 14:32:57 -0500 Subject: [Unified-mailman] First Phi Cup victory Message-ID: <5.2.1.1.2.20040306143103.00b8b100@po14.mit.edu> Hey everyone, In case you haven't heard the Unified team won our first Phi Cup game 3-0. Thanks to everyone who came out and cheered - it was awesome having fans there. Our next game is the semifinals on Sunday at 7pm (right before your 16.05 review session). If we win, the finals will be at 10:30 on sunday night. You should all come out and watch! See you tomorrow, -Howie From drela at MIT.EDU Sat Mar 6 18:51:30 2004 From: drela at MIT.EDU (Mark Drela) Date: Sat, 06 Mar 2004 18:51:30 -0500 Subject: [Unified-mailman] Re: Problem F16 part b In-Reply-To: Your message of "Sat, 06 Mar 2004 16:33:53 EST." <000b01c403c2$b926c100$96066012@D8L5VN11> Message-ID: <200403062351.i26NpUGJ027542@orville.mit.edu> >To calculate the stagnation pressure at the very tip of the >SR-71 nose sting, do we assume its end is blunt? Yep. Nothing is perfectly sharp. From cmatt at MIT.EDU Sun Mar 7 13:14:03 2004 From: cmatt at MIT.EDU (Chris Mattenberger) Date: Sun, 07 Mar 2004 13:14:03 -0500 Subject: [Unified-mailman] Phi Cup Semi-Finals Tonight! Message-ID: <5.1.0.14.2.20040307130750.00ba0448@hesiod> Sunday March 7th, 2004 Johnson Ice Rink 7 PM Unified vs. Burton United 35-225 8 PM Unified vs. Thermal Energy Johnson Ice Rink 10:30 PM Finals Unified (Hopefully) vs. 2nd Place Finishers (Either Old Skool Hockey, Eulers, Dry Brunsen, Scuds, of Fluids) Let's win this one guys! Howie said he might possibly think about maybe pushing back the due date on the Pset, maybe. Team, see you tonight at the Rink at 6:40! Fans, see you tonight at the Rink at 7:00! Prof. Spakovszky, see you tonight at 35-225 at 8:00! Cap'n Chris From howiek at MIT.EDU Sun Mar 7 14:28:06 2004 From: howiek at MIT.EDU (Howard Kleinwaks) Date: Sun, 7 Mar 2004 14:28:06 -0500 Subject: [Unified-mailman] more flight training stuff Message-ID: Pilots, If you haven't put in sim time, please do so immediately. It is very difficult to get everybody flight time during the training sessions, and sim time helps speed up the process. If your team's plane is built, feel free to bring it to the training sessions. This way we can work out potential bugs on your plane. -Howie From drela at MIT.EDU Sun Mar 7 19:06:56 2004 From: drela at MIT.EDU (Mark Drela) Date: Sun, 07 Mar 2004 19:06:56 -0500 Subject: [Unified-mailman] F17 reading: Anderson 9.1, 9.2 Message-ID: <200403080006.i2806ujM021218@orville.mit.edu>