How do I pick a cross section?
10-04-2007 | 01:34 PM
#1
Thread Starter
How do I pick a cross section?
I am planning a scratch built delta jet and need to pick a cross-section. The site that I have looked at for making foam wings gives me over 1500 options.
How do I pick a cross section? What would be suitable for a delta configuration?
Are there any tutorials or guides that might help me?
How do I pick a cross section? What would be suitable for a delta configuration?
Are there any tutorials or guides that might help me?
10-04-2007 | 02:25 PM
#2
My Feedback: (2)
RE: How do I pick a cross section?
I would first look at some of the airfoils available that include a slight amount of reflex in the trailing edge - that is, it appears to have a built-in "up elevon". This will take care of or minimize pitching moment issues. (I am assuming this is a "flying wing" type delta wing, as opposed to a MiG-21 type delta wing, which uses a seperate h-tail for pitch control.) This would give you a clean design.
I'd also look at airfoils used for similar type airplanes, also, to get you started.
I'd also look at airfoils used for similar type airplanes, also, to get you started.
10-04-2007 | 05:07 PM
#3
RE: How do I pick a cross section?
Try this question over in the aerodynamics forum.
The MH series for flying wings could be a place to start. http://www.mh-aerotools.de/airfoils/index.htm
Also many deltas have been using symmetrical profiles ala the naca 00XX series.
I had a Balsacraft Rapier that was totally symmetrical, and a good flyer.
Regards
Lars
The MH series for flying wings could be a place to start. http://www.mh-aerotools.de/airfoils/index.htm
Also many deltas have been using symmetrical profiles ala the naca 00XX series.
I had a Balsacraft Rapier that was totally symmetrical, and a good flyer.
Regards
Lars
10-04-2007 | 05:35 PM
#4
My Feedback: (2)
RE: How do I pick a cross section?
ORIGINAL: Ron S
I would first look at some of the airfoils available that include a slight amount of reflex in the trailing edge - that is, it appears to have a built-in "up elevon". This will take care of or minimize pitching moment issues. (I am assuming this is a "flying wing" type delta wing, as opposed to a MiG-21 type delta wing, which uses a seperate h-tail for pitch control.) This would give you a clean design.
I'd also look at airfoils used for similar type airplanes, also, to get you started.
I would first look at some of the airfoils available that include a slight amount of reflex in the trailing edge - that is, it appears to have a built-in "up elevon". This will take care of or minimize pitching moment issues. (I am assuming this is a "flying wing" type delta wing, as opposed to a MiG-21 type delta wing, which uses a seperate h-tail for pitch control.) This would give you a clean design.
I'd also look at airfoils used for similar type airplanes, also, to get you started.
On the other hand I didn't even realise there is an aero-d forum. Sounds cool and I'm gonne check it out..........
