From drela at MIT.EDU Mon Feb 16 18:03:36 2004 From: drela at MIT.EDU (Mark Drela) Date: Mon, 16 Feb 2004 18:03:36 -0500 Subject: [Unified-mailman] F8 reading: Anderson 5.3.2 Message-ID: <200402162303.i1GN3a11017735@orville.mit.edu> From ccoleman at MIT.EDU Wed Feb 18 11:40:43 2004 From: ccoleman at MIT.EDU (Charles P Coleman) Date: Wed, 18 Feb 2004 11:40:43 -0500 Subject: [Unified-mailman] RE: Questions about freedom and creativity In-Reply-To: <403326D2.3070700@mit.edu> Message-ID: Ryan- Quick answers to your questions: >bigger propellers You will be given a choice and guidance for choosing in SP8 >twin engines nope. >larger wing sizes yep. SP7 >tail modifications yep. SP7 >different batteries nope. >a load catch system (that is one where the plane doesn't have to land) nope. Land the plane. Best! Charles -----Original Message----- From: Ryan F. Allard [mailto:furness at MIT.EDU] Sent: Wednesday, February 18, 2004 3:48 AM To: Charles P Coleman Subject: Questions about freedom and creativity Prof Coleman, How much engineering freedom do we have in our Craft design? My Team has brainstormed the following ideas for improving the aircraft. We would like to know which of them you allow before we do too much research into them: Suggestions were for using: bigger propellers twin engines larger wing sizes tail modifications different batteries a load catch system (that is one where the plane doesn't have to land) Thank you for your help! Ryan From chipd at MIT.EDU Wed Feb 18 13:23:42 2004 From: chipd at MIT.EDU (Carl Dietrich) Date: Wed, 18 Feb 2004 13:23:42 -0500 Subject: [Unified-mailman] IMPORTANT: NEXT LECTURE IN JOHNSON! Message-ID: Students, Due to scheduling constraints with Johnson athletic center, we have to switch tomorrow's fluids and systems lectures. The Systems lecture (which will include a Dragonfly demonstration by professor Drela) will be in Johnson at 10am tomorrow morning. The afternoon lecture (1-2pm) will be a fluids lecture in 35-225. -Carl ___________________________________________________________ Carl Dietrich MIT Rocket Team Unified Engineering Graduate TA MIT Department of Aeronautics and Astronautics Office: 33-104 Phone: 617-253-2274 ___________________________________________________________ From ccoleman at MIT.EDU Wed Feb 18 15:03:32 2004 From: ccoleman at MIT.EDU (Charles P Coleman) Date: Wed, 18 Feb 2004 15:03:32 -0500 Subject: [Unified-mailman] NEXT LECTURE IN JOHNSON! In-Reply-To: Message-ID: Students- Tomorrow we will do our best to run the competition with the baseline Dragonfly. Prof Drela will pilot. Some of you will time and score. Some of you will form a pit crew and figure out a procedure for loading the eggs. I'll bring the eggs and paper towels! This should be fun. We'll use this performance, operational, and experiential data to inform your redesign to better meet the functional requirements of the competition. The functional requirements for the baseline dragonfly are to be a slow, stable training flyer. Quite different from the functional requirements demanded by the competition. At the end of the semester, the data from the competition should allow us to objectively assess how well we have been able to re-engineer the original system (PPP) to meet the new set of requirements. There may be some interesting surprises... Best- Charles From chipd at MIT.EDU Wed Feb 18 16:37:44 2004 From: chipd at MIT.EDU (Carl Dietrich) Date: Wed, 18 Feb 2004 16:37:44 -0500 Subject: [Unified-mailman] Fwd: NEXT LECTURE IN JOHNSON! Message-ID: Just to be clear because there was some question/panic: you are NOT expected to complete your Dragonfly by tomorrow. This is a demonstration of already built models only. -Carl >X-Sieve: CMU Sieve 2.2 >From: "Charles P Coleman" >To: >Cc: "Charles P Coleman" >Subject: NEXT LECTURE IN JOHNSON! >Date: Wed, 18 Feb 2004 15:03:32 -0500 >MIME-Version: 1.0 >X-Priority: 3 (Normal) >Importance: Normal >X-Spam-Score: -10.2 >X-Spam-Flag: NO >X-Scanned-By: MIMEDefang 2.28 (www . roaringpenguin . com / mimedefang) > >Students- >Tomorrow we will do our best to run the competition with the baseline >Dragonfly. Prof Drela will pilot. Some of you will time and score. Some of >you will form a pit crew and figure out a procedure for loading the eggs. >I'll bring the eggs and paper towels! This should be fun. We'll use this >performance, operational, and experiential data to inform your redesign to >better meet the functional requirements of the competition. The functional >requirements for the baseline dragonfly are to be a slow, stable training >flyer. Quite different from the functional requirements demanded by the >competition. At the end of the semester, the data from the competition >should allow us to objectively assess how well we have been able to >re-engineer the original system (PPP) to meet the new set of requirements. >There may be some interesting surprises... >Best- >Charles > ___________________________________________________________ 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 Thu Feb 19 12:37:27 2004 From: chipd at MIT.EDU (Carl Dietrich) Date: Thu, 19 Feb 2004 12:37:27 -0500 Subject: [Unified-mailman] Mistake in 9am recitation Message-ID: Students, I made a mistake in the calculation of the tip deflection for the point-loaded beam case in the 9am recitation that was caught in the 11am recitation. Please drop by the TA office if you want an explanation of how to correct your notes. Sorry for any inconvenience. -Carl ___________________________________________________________ Carl Dietrich MIT Rocket Team Unified Engineering Graduate TA MIT Department of Aeronautics and Astronautics Office: 33-104 Phone: 617-253-2274 ___________________________________________________________ From ccoleman at MIT.EDU Thu Feb 19 12:28:17 2004 From: ccoleman at MIT.EDU (Charles P Coleman) Date: Thu, 19 Feb 2004 12:28:17 -0500 Subject: [Unified-mailman] Today's SP Lecture Data Message-ID: Trial Eggs Empty Pit Time Endurance Score Flight (sec) (sec) Flight (sec) (points) 1 1 30 31 133 132 2 3 32 56 67 108 3 3 26 49 crash DNF The table above contains data from today's lecture trials. The one egg baseline dragonfly won the day! The greater pit crew time put the three egg baseline in second place. However, even with the same empty and pit times are the one egg baseline the three egg baseline dragonfly with would have only scored 133 points, barely edging out the the one egg baseline dragonfly's scores. For comparison, 2003 competition data is shown below. Empty flight times are not greatly improved over today's data. Pit times, however, are greatly improved. And there is evidence that endurance can be significantly improved through redesign. However, please note that today's team using the baseline dragonfly, little training, one egg and duct tape could have beaten the last four of five teams in last year's competition! Good luck! Let's see what can be done in 2004! Charles -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mailman.mit.edu/pipermail/unified-mailman/attachments/20040219/77a0cb5f/attachment.htm -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 56359 bytes Desc: not available Url : http://mailman.mit.edu/pipermail/unified-mailman/attachments/20040219/77a0cb5f/attachment.jpg From spearing at MIT.EDU Sat Feb 21 01:50:58 2004 From: spearing at MIT.EDU (spearing@MIT.EDU) Date: Sat, 21 Feb 2004 01:50:58 -0500 Subject: [Unified-mailman] fake Message-ID: <200402210650.i1L6oaAf001420@fort-point-station.mit.edu> is that from you? -------------- next part -------------- A non-text attachment was scrubbed... Name: attachment.zip Type: application/x-zip-compressed Size: 22150 bytes Desc: not available Url : http://mailman.mit.edu/pipermail/unified-mailman/attachments/20040221/8120294d/attachment.bin From gosh_d at MIT.EDU Sat Feb 21 02:45:12 2004 From: gosh_d at MIT.EDU (gosh_d@MIT.EDU) Date: Sat, 21 Feb 2004 02:45:12 -0500 Subject: [Unified-mailman] Re: fake In-Reply-To: <200402210650.i1L6oaAf001420@fort-point-station.mit.edu> References: <200402210650.i1L6oaAf001420@fort-point-station.mit.edu> Message-ID: <1077349512.40370c885845d@webmail.mit.edu> For those of you without scanners, it's a virus. Remember: don't open attachments from people you don't trust, least of all professors. (= -Elvio Quoting spearing at MIT.EDU: > is that from you? > From drela at MIT.EDU Sat Feb 21 13:27:10 2004 From: drela at MIT.EDU (Mark Drela) Date: Sat, 21 Feb 2004 13:27:10 -0500 Subject: [Unified-mailman] Re: F9&F10 Message-ID: <200402211827.i1LIRAuh023417@orville.mit.edu> >So when I do part a) of the problem >... >I don't believe there's a way of getting rid of b. >Is the b supposed to be there? You can "get rid of it" by plotting ai versus y/b rather than versus y. Or better yet, plot it versus eta = 2y/b. Eta runs from -1 to +1, and is commonly used in the aero business to plot stuff versus spanwise location. I could have made that more clear in the Pset. Sorry. From spearing at MIT.EDU Sun Feb 22 13:37:38 2004 From: spearing at MIT.EDU (Mark Spearing) Date: Sun, 22 Feb 2004 13:37:38 -0500 Subject: [Unified-mailman] Apologies for Virus Message-ID: Dear Unified colleagues. It appears that a virus, or some other form of self-replicating software, sent itself on to you via my email address over the weekend. Please accept my apologies and do not open my previous email. Regards Mark Spearing From drela at MIT.EDU Sun Feb 22 16:48:29 2004 From: drela at MIT.EDU (Mark Drela) Date: Sun, 22 Feb 2004 16:48:29 -0500 Subject: [Unified-mailman] Reading for F12: Anderson 2.7, 7.4, 7.5 Message-ID: <200402222148.i1MLmTrU017887@orville.mit.edu>