Saturday, March 22, 2008

Primed, Painted, and Pretty


There she is all painted and nearly ready for flight. Just a few more days and she will be flying. We've done an installed engine test, a drop test, break test, wing loading test, and others. All that is left now is to fine tune the radio, pass the Dr. Hall inspection, high speed taxi, and then 2 days after the high speed taxi test will be first flight! Pictures from that for sure. For now more pictures are here.

Friday, February 22, 2008

Not more pictures but...

Video! Yep that's right live action video this time around. Team Phelan performed its static engine test Thursday (2/21/08) and we have video of it. Overall I think we all feel that we have a good engine and propulsion ducting.

A little bit about the engine from the manufacturer...

Manufacturer: AMT, it's a Mercury-180
Weight: 3.1 lbs
Max. specified thrust: 20
Max. RPM: 151,200
Exhaust Gas Temperature Range: 1200-1380 deg. F
Fuel: Kerosene
Fuel Consumption at 100% throttle: 10 oz./min.

I remind you these are the numbers from the manufacturer... here are some numbers we got last semester in our propulsion lab.

Manufacturer: AMT, it's a Mercury-180
Weight: 3.1 lbs
Max. thrust: 16.2
Max. RPM: 142,800
Exhaust Gas Temperature Range: 950-1030 deg. F
Fuel: Kerosene
Fuel Consumption at 100% throttle: 15 oz./min.

And with the engine inlet, bypass duct, and tail pipe Team Phelan hit 14.7 lbs regularly in the test. This may not seem great, but we are pleased by it because with all of our performance calculations done last semester in the design phase we used 14 lbs of thrust. Also, Team Goose hit 14.1 lbs in their test the day before.

Some of you propulsion smartypants readers (are there any of you that actually read this?) would say, "Hey but what about standard day corrections!?" Well our propulsion guy ran those numbers and figured out that we would only lose a tenth of a pound if the standard atmospheric conditions existed (29.92" Hg and 59 deg. F).

If you were really hoping for pictures well don't feel too bad, I should have some up and ready no later than Monday night.

Sunday, February 17, 2008

Wildlife

Also check out Alan's blog...



Monday, February 11, 2008

More Pictures

Here are more Team Phelan pictures!

It looks like I'll be getting them every 2 weeks (that's when our 'Update' presentations are).

Enjoy

Wednesday, January 30, 2008

A quick one

Finally I have some pictures to show for Team Phelan's work thus far in the semester. I'll try to keep them updated as much as possible, but I'm not in control of when I can get the pictures, so enjoy for now. Here's the link.

By the way, something mysterious happened to all the pictures on the previous post. Sorry 'bout that. I doubt that I'll get around to fixing it any time soon, so try to be happy with the real pictures now.

I'll try to get more posts up from now on. (When isn't that a goal?) I've got some potentially exciting bike happenings that are in the works.

Sunday, December 23, 2007

Yay!

So school is done...for the fall. Now comes the build blitz for Team Phelan in the Spring. We were all happy to find out at the end of exam week that we were cleared to build. Here are some pictures from our computer models.

This is the cover of our CDR document.














And here is a taste of the CMARC model. CMARC simulates pretty much everything aerodynamic except for drag, go figure. What you see here is a coefficient of pressure during the cruise portion of flight.





Next are some of the CAD models.















Ooooo, ahhhhh!















All dimensions are in inches (boo not metric).

One thing I think all of us were excited to learn was the professor's desire to create a removable wing-tip design. Our team leader presented on a wing tip designs and what they did for an aircraft, so the professor called up the authors and wanted to know if they were interested in using our vehicle as a platform for experimental data collection. Under normal flight we will use the wingtip shown on the right.





For now I'm enjoying a nice long break out in the great state of Colorado. It can't be beat!

Friday, November 30, 2007

Times Change

So this semester I've been enjoying a class in Fluid Physics which emphasizes earth science applications, inevitably some aerodynamics shows up too. In an attempt to get away from the long derivation based lectures the professor shows videos on fluid mechanics that were made back in the late 50s and early 60s. I very much enjoy these videos and can't wait till the next Wednesday class each week; the semester is coming to an end which is unfortunate with respect to this part of my week.

Anyway I get my hands on these videos (VHS) and convert them to a digital format so I may enjoy them for years to come, they really are a treat to watch. And one thing I have come to admire is the immaculate hand writing of the narrator/host, Ascher Shapiro. His penmanship is in start contrast to much of the hand writing I see on a daily basis, especially that of my professors. I got to thinking (during class usually) how things like this change, maybe it's my romanticized view of by gone eras, or maybe it really is that people in general had better writing back then. I can't help to think as I peck away at some letter label buttons how little I actually 'write' and how much life now depends on typing. I always appreciate aesthetics, although some might say I don't, but I find it very rare to see a nice piece of penmanship. I know I am not gifted with this ability, but after the last few weeks I have become more aware of my own writing.

I have always thought my writing was mediocre at best, but it seems to get the point across. And that's the thing, I think people feel like writing is such a slow use of time that they hurry through it with out much concern for it's ability to communicate to other readers. I know I am guilty of this. I would say that 99.99% of my writing is solely for personal use; notes are essential to students, and even then I am always critiqued for how sparse and dense my class notes are. But now after watching the wonderful strokes of Dr. Ascher Shapiro I am very aware of what can be done with practice of the arm-hand-eye coordination, I will strive for this for some time to come.

As I sit here writing this out I can only think of the modern equivalent to what I have identified, the rush to finish typing because it feels like such a drain of time. Again I am guilty as charged. Many times reports and papers have to get done and nearly all of those many times a deadline is breathing down your neck, the result, poorly written text. (See! I'm not sure if I even got the punctuation correct on the end of that last sentence.) Now the thing I fear! People who can't physically write clearly enough so that other people can read it, and people who can't express their ideas to get their point across in the first place. I don't like what popular technology does to some parts of our lives.

Do I make myself clear?