Solved How do i get the molded airfoils?

[RossFPV]

I noticed some people having a smooth airfoil instead of the crease marks at the spar, how do you do it and what are the pros and cons of doing it?

 

[CrshNBrn]

I noticed some people having a smooth airfoil instead of the crease marks at the spar, how do you do it and what are the pros and cons of doing it?

Its a pretty common building technique, especially with master series-style planes. Check out one of the older build videos- Overstreet is like the Bob Ross of foamboard. Basically, you remove the paper from one side of the foamboard and shape it on the edge of a table or countertop. You may lose a little strength, but the curves are much smoother.

 

[RossFPV]

Im just not sure if i remove the paper the whole way to the end, especially with ailerons.

 

[quorneng]

A smooth top surface does create a more efficient wing in that it has less drag for the same amount of lift so requires that much less power to fly or it can fly a bit faster on the same power.
Of course whether you are likely to notice the difference will heavily depend on the aerodynamics of the rest of the plane.

 

[RossFPV]

I did it and it is my most beautiful wing ever. too anyone else about to try it, do it and you wont regret it! 👍

 

[CrshNBrn]

Nice. I was going to say to leave the paper on both sides of the aileron, as you want that to be stiff, but I think you already figured that part out.

 

[Hondo76251]

I use a dowel rod to shape the wing and, as you pointed out, keep enough paper on for the ailerons. Its my favorite way to make wings for sure.

 

[RossFPV]

Yeah i kept paper for the ailerons, im going to make all my wings this way now.

 

[william Metge]

Yeah i kept paper for the ailerons, im going to make all my wings this way now.

Just don't forget to remember that the wing is slightly weaker without that foam on the other side, if you make an under-cambered airfoil, I would suggest to keep the foam on both sides.

 

[Merv]

...what are the pros and cons of doing it?

I make 4 facets in my wings.
A curved airfoil is only slightly more efficient than a faceted airfoil, at most 10% better glide slope but likely 2-3%.

In other words it's hard to tell any difference.

 

[CrshNBrn]

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Is it just me, or is the forum being hit with a lot of spam lately?

 

[JetCrafts]

Is it just me, or is the forum being hit with a lot of spam lately?

all of us don't worry

 

[bisco]

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