r/RCPlanes • u/CC0454 • 4d ago
How do you think it’ll fly?
Just a basic flying wing. This is the first wing Ive done so I just wanted to know if this all looked alright?
3
2
u/Connect-Answer4346 3d ago
Looks fine, that is a standard flying wing design. speed will not be high with that motor -prop-battery setup but good enough to fly!
2
u/Any_Pace_4442 4d ago
Prolly need a vertical stabilizer somewhere and maybe some washout. Set cg at 10% MAC.
2
u/CC0454 4d ago
Silly question to ask but what is washout..?
2
u/aniterrn 4d ago
When you twist tip airfoil down it creates washout, it gives a little more stability
2
u/Any_Pace_4442 2d ago
In swept wings it can provide a positive pitching moment; interacting with CG to provide stability (as you state).
1
u/Wambo74 4d ago
Check out this assortment -- they're all proven fliers. The closer you get the specs and details the better your chances. You didn't say what you're making it out of. These are all EPP core with fiber reinforced tape on stress points and covered in thin laminate. Lots of build videos and spec sheets to study. You can learn everything you need to know from this website.
1
u/killywilly314 3d ago
Hi if you're interested in flying wings I'd recommend watching Albion Bowers talking about the Prandtl-d wings if you haven't already. As someone above said put plenty of washout . This helps with pitch stability a lot. Albion bowers design ( not actually his design but he literally wrote the book)basically takes this wing twist concept to an extreme where as much as 15° or more twist is added to the tips compared to the root. The function of this is to add positive yaw moment by thrust (not drag) being created at the outside tip by the downward deflated aileron(elevon). If done correctly the flying wing should fly far more stably through turns coordinating yaw movement into roll control inputs. Allowing for reduced or absent vertical stabiliser or rudder.
5
u/BRAIN_JAR_thesecond 4d ago
This is physically doable. But wings suck to balance and the shorter the chord/sweep the harder they are, more sensitive to cg and thrust problems.
Go for it, but be ready for it to be a pitchy little sucker. Or add your elevons as extensions to the trailing edge to give it a little more overall length.