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2012 Kettering University Aero Design Plane - 2/16/2012 3:59 AM   
paroflyer


 

Posts: 17
Score: 100
Joined: 10/21/2009
Last Login: 12/2/2012
From: Olathe, KS, USA
Status: offline 		Take a look at this aircraft design by Kettering University Aero Design Plane, it is being entered into this years SAE Aero Design west competition. It is really different.

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RE: 2012 Kettering University Aero Design Plane - 2/16/2012 4:39 AM   
jester_s1


 

Posts: 3800
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Last Login: 5/21/2013
From: Fort Worth, TX, USA
Status: offline 		Is that the Fort Worth contest? If so I'll probably see the plane in person. The Polish team showed up with a tandem wing last year that looked similar to that one. It was definitely the talk of all the workers. It performed fairly well too from what I remember.

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RE: 2012 Kettering University Aero Design Plane - 2/16/2012 6:51 AM   
BMatthews



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Last Login: 5/21/2013
From: Chilliwack, BC, CANADA
Status: offline 		If you want to discuss this design then how about actually posting the picture here instead of a link to another site. Those who are not members at that site can't view the picture.

From what I see of the thumbnail it's just another tandem wing. As mentioned tandem wings have been around for a long time and show up in all manner of uses. The big advantage is that the "stabilizer" can be loaded up and aid with lifting the load.

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RE: 2012 Kettering University Aero Design Plane - 2/28/2012 6:02 PM   
mithrandir



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Last Login: 5/10/2013
From: adelanto, CA, USA
Status: offline 		conventional designs prevail for a reason....

... they perform better....

Tandem configuration suffers more drag for the lift generated...

... what drove you to this?

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RE: 2012 Kettering University Aero Design Plane - 3/2/2012 11:44 PM   
BFoote


 

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Can't really tell from that small pic as I can't open it for a scale perspective. If its micro, going wingletless and no biplane makes a huge amount of sense especially at those reynolds numbers as there just isn't any data at that low of Re's. Then again with the weight formula in micro class a tandem doesn't make much sense either. Its based on payload fraction along with its empty weight where the empty weight is the driving factor, thus favoring 1lb planes.

A larger main wing along with winglets is superior for L/D for Aero Design and its tiny takeoff speed and velocity profile. Year I did it, we screwed up and didn't make the winglets large enough. Still won, but should have crushed the competition instead. We ran out of time for design work and had to get building the plane. Winglets allowed us to pick an extra 2-3lbs. If they were larger along with a larger wing, we would have picked roughly 10-12lbs more. We also didn't have the proper propeller as we ran out of time for engine testing losing nearly a pound of thrust, OUCH! We only had 2 folks on our "team". A Biplane with winglets is better than a tandem as well.

That being said, they might be entering the micro class. If that is the case then winglets and biplanes would probably take up too much space in the box or conversely take too long to put together in their 3 minutes alloted time would be their thinking. Though I have seen designs that don't have this issue. Pop detent pins work great.

Bottom line: Only have so much time or design and testing, gotta get down to building and test flying. Gotta leave options open for next year...




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