RE: Good Reading?  
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All Forums >> RC Airplanes >> Aerodynamics >> RE: Good Reading?
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RE: Good Reading? - 4/22/2008 10:18:16 PM   
da Rock



Posts: 6132
Joined: 10/11/2005
From: western, NC, USA
Status: offline
quote:

ORIGINAL: BMatthews

Has anyone mentioned Soartech 8 yet?



Is it a book or research papers?

By Selig?

(time to try a Google, ain't it)


OK.... Googled it.............. Here is the whole ball of wax:

http://www.soartech-aero.com/index.html


< Message edited by da Rock -- 4/22/2008 10:20:02 PM >

(in reply to BMatthews)
       Post #: 26

RE: Good Reading? - 4/22/2008 10:29:12 PM   
da Rock



Posts: 6132
Joined: 10/11/2005
From: western, NC, USA
Status: offline 		And that led to a very large resource of model publications.

Click on the button on the left of the page that is labeled: Book Hangar.

http://www.flying-models.com/






(in reply to da Rock)
       Post #: 27

RE: Good Reading? - 4/23/2008 3:42:41 PM   
hogboy52


 

Posts: 3
Joined: 12/18/2007
From: Portland, OR, USA
Status: offline 		I have a copy of Charles Grant's "Model Airplane Design, Theory of Flight" c.1942, which covers all that's involved in free-flight from the classical era- a major analysis of the principles of stability, design of the various types from indoor to gas, a large section on designing and carving propellers for various uses, etc.. Not particularly useful for modern types, but it has helped me understand why things go wrong.

< Message edited by hogboy52 -- 4/23/2008 3:45:25 PM >

(in reply to BMatthews)
       Post #: 28

RE: Good Reading? - 4/23/2008 8:57:29 PM   
BMatthews



Posts: 8797
Joined: 10/4/2002
From: Burnaby, BC, CANADA
Status: offline
quote:

ORIGINAL: da Rock

quote:

ORIGINAL: BMatthews
Has anyone mentioned Soartech 8 yet?

Is it a book or research papers? By Selig? (time to try a Google, ain't it)

OK.... Googled it.............. Here is the whole ball of wax:

http://www.soartech-aero.com/index.html



I knew they had one more book come out and I even think i may have it as well. I didn't realize they had two more.

There was also a good book on model sized sailplane design by Eric Lister. A highly pragmatic approach using a little math and a lot of examples for ensuring efficiency and stability. Dick would like it because it's got a lot of real world compromises in it...

That real world stuff is also why I highly recomend the orginal Selig report of Soartech 8. It helps us to not only appreciate the theory but also to see how little or much distortion turns the theory into something resembling that old saw about how many angels can dance on the head of a pin.

I see that the old David Fraser program is still available. I know it's not a book but it's a valuable resource. That was a superb program for analysing an airframe, ANY airframe, not just sailplanes. Along with expected sink speeds and best lift/drag calculations it also produced charts of the wing's and stabilizer's lift coefficients as the model moves through the speed range. VERY informative. And as I said you can use a lot of what it tells you for sport power models as well as the sailplanes. Probably of minimal intrest to hot 3D designs but something like a heavy lift model or a camera plane or any other such design. A buddy gave me is copy when he got out of the hobby years ago when him and I were running it on his TRS80 and me on one of the original 286 computers I had. I can only imagine how fast it'll be now. It used to take about 5 minutes to draw a chart with lots of comparisons on it.....



_____________________________

Bruce-
Proudly wasting balsa since 1965.

Free Flighters go that extra mile........

(in reply to da Rock)
       Post #: 29

RE: Good Reading? - 4/23/2008 9:13:33 PM   
CrateCruncher



Posts: 532
Joined: 10/14/2005
From: Austin, TX, USA
Status: offline 		I'm currently wanting to do high-performance pattern ships so right now I'm only interested in polars for the symmetrical stuff. I started doing a bit of digging myself. The "Soartech" website has specific detail about which profiles were tested in each volume which will save me a lot of money! Most of the work is geared toward soaring but in the last Volume (V3) they got jiggy and started testing Goldberg Ultimate's, UltraSport 2000's and lots of other popular powered R/C airfoils. Way cool.

Before I pay for the Profili2 upgrade, is there any symmetrical airfoil polar data available in the Xfoil plug-in?

THANKS TO EVERYONE FOR MAKING THIS A GREAT THREAD!!!!



< Message edited by CrateCruncher -- 4/23/2008 9:45:40 PM >

(in reply to hogboy52)
       Post #: 30

RE: Good Reading? - 4/25/2008 3:18:06 AM   
BMatthews



Posts: 8797
Joined: 10/4/2002
From: Burnaby, BC, CANADA
Status: offline 		Xfoil will generate the lift drag curves and lift to angle of attack curves from any shape you can form using coordinates that can be plugged into the airfoil library. So that means you could input a shovel shape and analyze that if you so wish. The freeware version doesn't let you do that but the unlock code you buy opens up that ability.

So this means you've got a good 30 to 40 symetrical airfoils in the library as it comes and can modify those or import any others that you can find the coordinates for and shape the file structure to be adaptable for Profili.


_____________________________

Bruce-
Proudly wasting balsa since 1965.

Free Flighters go that extra mile........

(in reply to CrateCruncher)
       Post #: 31

RE: Good Reading? - 6/16/2008 3:14:49 PM   
Tim Green


 

Posts: 92
Joined: 4/10/2004
From: Madison, OH, USA
Status: offline 		Understanding Flight, by David F. Anderson and Scott Eberhardt - observation and logic, many real world examples to back up theory, not much math. Emphasis on Newton.

http://www.amazon.com/Understanding-Flight-David-Anderson/dp/0071363777

< Message edited by Tim Green -- 6/16/2008 3:40:32 PM >

(in reply to BMatthews)
       Post #: 32

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