NACA66 (MOD) 2

[mech5190]

Hi. I will work with a NACA 66 (MOD) in an exersise and i want all points or function which describe this NACA. This NACA has characteristics: max camber 2% at 50% and max thick 12% at 45%. I search everywhere but i don't found nothing. Can anyone help me?

Basic i found some Java programs at internet but have only for NACA 4 dig or 5 dig. For modified NACA there is not.

 

[Onda]

I think this is what you are looking for.
If you need something different, you colud ask me again or get the software I have used to generate this data.
Is not a freeware but the price is low.

http://www.profili2.com

Onda

NACA 66-412 - Camberline=0
1.00000 0.00000
0.95044 0.01104
0.90086 0.02265
0.85115 0.03426
0.80130 0.04533
0.75132 0.05555
0.70122 0.06457
0.65101 0.07198
0.60072 0.07729
0.55037 0.08026
0.50000 0.08171
0.44962 0.08190
0.39923 0.08089
0.34886 0.07862
0.29850 0.07510
0.24817 0.07025
0.19788 0.06388
0.14767 0.05574
0.09756 0.04522
0.07258 0.03875
0.04767 0.03117
0.02291 0.02168
0.01063 0.01559
0.00583 0.01214
0.00350 0.00993
0.00000 0.00000
0.00650 -0.00793
0.00917 -0.00934
0.01437 -0.01131
0.02709 -0.01424
0.05233 -0.01853
0.07742 -0.02179
0.10244 -0.02454
0.15233 -0.02882
0.20212 -0.03204
0.25183 -0.03445
0.30150 -0.03622
0.35114 -0.03742
0.40077 -0.03805
0.45038 -0.03810
0.50000 -0.03759
0.54963 -0.03646
0.59928 -0.03445
0.64899 -0.03078
0.69878 -0.02569
0.74868 -0.01975
0.79870 -0.01349
0.84885 -0.00734
0.89914 -0.00197
0.94956 0.00160
1.00000 0.00000

 

[mech5190]

Maybe. But The numbers of this NACA (66-412) what mean?
With other words, this NACA has at 45% max thick? Where look it?
Also i want a lot of points. at least, 500 points for any section and more densely at leading edge.

 

[Onda]

66 is NACA series.

4 is a progressive number for camber. 2.2% for this case.

12 is thickness as requested.

If you run a spline through point you will see that they are enough to define the profile.

Why you need so many points? what do you need to do with them?

Onda

 

[mech5190]

I want simulate this NACA with CFDs. And i must have a lot of point because the Gambit(if you know: program for decrizitation), put the points and connect them with lines. Thus , in reality, i have a polygon and no curbe and then i have problem at finite volume near the wall.

Can you sent me these points (in a file)? i want 500 for any section.

A! The number 66 mean that the location of max camber is 50% and location max thick is 45%?

 

[Onda]

You have to fit a spline trough the point I have provided.
Then design the area around the airfoil and mesh this area with Gambit.
You don't need a lot of points! You only need a good fit spline, then you could in Gambit make a good mesh.

If You cannot use a spline just import your points in a cad software, (autocad rinocheros o whatever). Fit a spline through that points, and then divide the spline in the number of points you need. But I think is not the right way to use Gambit.
About NACA 66 You are right, is a profile with camber @50% and max thick @45%
Onda

 

[mech5190]

Yes... Initially, I thing to do spline with a few point which i have, but can not do this.
With Autocad 2008, do you know how became this procedure?
1. how input the points?
2.How make a spline with these points?

Thanks very much for information!!!

 

[Onda]

You should make a script with the point I have provided.

I've done for you, it's easier then explain how to..

Just import the script in autocad 2008. I've checked and it work.

Onda

 

[mech5190]

Ok. i do this which tou tell me. I run the script. It worked and the points of NACA showed.
Now, what am i do? How i make the spline with this points?

 

[MikeHalloran]

Open AutoCAD. Press <F1>.



Mike Halloran
Pembroke Pines, FL, USA

 

[rb1957]

"I will work with a NACA 66 (MOD) in an exersise" and basic questions about how to use Autocad ... suggest student post ?

 

[Onda]

The proper use of Google and software's online help can save a lot of time of other people!

Try by yourself to resolve questions before to ask help to others!

Onda

 

[taglia]

see this