Recommended Airfoil For Flying Wing?

Radioguy · Nov 17, 2002, 04:32 AM

Hi Folks:

I have a foam cutting bow and would like to make a small wing similar in concept to the Mini Speedwing.

Can you recommend an appropriate airfoil I could download, make templates, and cut?

The wing will be covered with packing tape in "the usual manner" for this type of model.

Thanks in advance for offering your advice.

Lee Smith

Duane · Nov 17, 2002, 01:52 PM

I've heard the MH45 is very good for wings. I used the MH 43, I think it might be a little thinner, Wedgies use a modified MH43. If it is going to be small, and small power, why make it heavy using tape? A little tape for reinforcement, then some of that cheap craft paint makes for a light wing. Profili has like 1800 different airfoils to down load free.

Radioguy · Nov 18, 2002, 07:57 AM

Duane:

Thanks for the tip. I downloaded Profili and printed the MH45. Looks like a neat program!

Lee

Mike_Y · Nov 18, 2002, 01:25 PM

Here's the dimensions of a wing I made in the summer. Suprisingly stable for such a small plane.

Radioguy · Nov 18, 2002, 05:35 PM

Mike:

Those dimensions are very helpful and it is just about the exact size I envisioned for my little project.

I have been to South Wales a couple of times while visiting Cliff Nancarrow of Sailplanes International in the late 80's. The slopes were beautiful and rarely have I ever been treated in so welcoming a manner by the general populace and by modellers in particular. When I was introduced as coming from Canada to learn slope aerobatics, there was no shortage a friendly advice and I came away with a firm grounding in slope aeros which I passed along to my buddies here.

When the sun is shining, I can't recall a prettier spot than the hills of Wales. While I had a little difficulty with the dialect early on in my visit, having an English Grandmother eventually had me understanding most of the local lingo. My wife...of Austrian/Canadian background, never did get the drift of the conversation, so I would "translate" for her...LOL

Regards,
Lee Smith,
Winnipeg, Manitoba,
Canada

Alfredo Rubio · Nov 18, 2002, 06:22 PM

Ohh, flying wings, I love it, I flew several comets, the last in electrics, I used the scale rib in a comet, but this rib give to the plane more speed, if you design an stright wing you need a reflex wing, for autostability, but if you will design an sweept wing, you can use any design of rib, even flat bottom or clark y, the autostability you get with the elevons

Mike_Y · Nov 18, 2002, 07:06 PM

Hi Lee

Glad you enjoyed your visits to Wales, good to hear my fellow countrymen treated you well.

With the dimensions above I found the centre of gravity was very forgiving but I played around with different sweep angles mostly increasing the sweep and found the C of G was too critical and the slightest alteration of battery position would make the wing unflyable. I made several of the above wings to those dimensions for friends and they all flew well. I also used thinner profiles which made them slightly quicker but they had zero glide, power off and less stable overall.

Good luck with your mini delta.

Mike_Y · Nov 18, 2002, 07:12 PM

also have a look at this site, there's quite a bit of info on mini deltas there.

http://www.royalkensington.org/%7Ewing/home.htm

Mike_Y

Nowell York · Nov 19, 2002, 12:21 PM

Those of you who have designed wings--you include the elevons in the chord calculation, correct?

Alfredo Rubio · Nov 19, 2002, 05:17 PM

Thats right, when you design a flying wing, you want to include the elevons in chord, even if elevons are flat, I saw a report of flying W. from Spanish, and they told if you design a sweept wing youn can choose any reb, even flat bottom, I confirmed that when flew my Komet Me- 163 A of 105 gms electric motor, not fly fast but glides like a bird

miguelAr · Nov 20, 2002, 10:31 AM

hi, Alfredo
i'm very interested, for a future project, in an electric ME-163A
with good gliding ability.
at this moment, i haven't found none that likes me enough.
can you add some details about yours?
thanks,

Nov 17, 2002, 04:32 AM	#1
Radioguy Registered User Join Date: Mar 2002 Location: Winnipeg Intl, Canada Posts: 633	Recommended Airfoil For Flying Wing? Hi Folks: I have a foam cutting bow and would like to make a small wing similar in concept to the Mini Speedwing. Can you recommend an appropriate airfoil I could download, make templates, and cut? The wing will be covered with packing tape in "the usual manner" for this type of model. Thanks in advance for offering your advice. Lee Smith

Nov 18, 2002, 01:25 PM	#4
Mike_Y silent flight Join Date: May 2002 Location: South Wales UK Posts: 1,568	Here's the dimensions of a wing I made in the summer. Suprisingly stable for such a small plane. Attached Thumbnails 30.3 KB · Views: 274

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Nov 17, 2002, 01:52 PM	#2
Duane Registered User Join Date: Dec 2000 Location: Arlington ,Tx ,USA Posts: 311	I've heard the MH45 is very good for wings. I used the MH 43, I think it might be a little thinner, Wedgies use a modified MH43. If it is going to be small, and small power, why make it heavy using tape? A little tape for reinforcement, then some of that cheap craft paint makes for a light wing. Profili has like 1800 different airfoils to down load free.

Nov 18, 2002, 07:57 AM	#3
Radioguy Registered User Join Date: Mar 2002 Location: Winnipeg Intl, Canada Posts: 633	Duane: Thanks for the tip. I downloaded Profili and printed the MH45. Looks like a neat program! Lee

Nov 18, 2002, 05:35 PM	#5
Radioguy Registered User Join Date: Mar 2002 Location: Winnipeg Intl, Canada Posts: 633	Mike: Those dimensions are very helpful and it is just about the exact size I envisioned for my little project. I have been to South Wales a couple of times while visiting Cliff Nancarrow of Sailplanes International in the late 80's. The slopes were beautiful and rarely have I ever been treated in so welcoming a manner by the general populace and by modellers in particular. When I was introduced as coming from Canada to learn slope aerobatics, there was no shortage a friendly advice and I came away with a firm grounding in slope aeros which I passed along to my buddies here. When the sun is shining, I can't recall a prettier spot than the hills of Wales. While I had a little difficulty with the dialect early on in my visit, having an English Grandmother eventually had me understanding most of the local lingo. My wife...of Austrian/Canadian background, never did get the drift of the conversation, so I would "translate" for her...LOL Regards, Lee Smith, Winnipeg, Manitoba, Canada

Nov 18, 2002, 06:22 PM	#6
Alfredo Rubio Moderador Join Date: Sep 2002 Location: guadalajara, jalisco, mexico Posts: 6,431	Ohh, flying wings, I love it, I flew several comets, the last in electrics, I used the scale rib in a comet, but this rib give to the plane more speed, if you design an stright wing you need a reflex wing, for autostability, but if you will design an sweept wing, you can use any design of rib, even flat bottom or clark y, the autostability you get with the elevons

Nov 18, 2002, 07:06 PM	#7
Mike_Y silent flight Join Date: May 2002 Location: South Wales UK Posts: 1,568	Hi Lee Glad you enjoyed your visits to Wales, good to hear my fellow countrymen treated you well. With the dimensions above I found the centre of gravity was very forgiving but I played around with different sweep angles mostly increasing the sweep and found the C of G was too critical and the slightest alteration of battery position would make the wing unflyable. I made several of the above wings to those dimensions for friends and they all flew well. I also used thinner profiles which made them slightly quicker but they had zero glide, power off and less stable overall. Good luck with your mini delta.

Nov 18, 2002, 07:12 PM	#8
Mike_Y silent flight Join Date: May 2002 Location: South Wales UK Posts: 1,568	also have a look at this site, there's quite a bit of info on mini deltas there. http://www.royalkensington.org/%7Ewing/home.htm Mike_Y

Nov 19, 2002, 12:21 PM	#9
Nowell York Frequent Flyer Join Date: Nov 2001 Location: Columbus, Ohio Posts: 755	Those of you who have designed wings--you include the elevons in the chord calculation, correct?

Nov 19, 2002, 05:17 PM	#10
Alfredo Rubio Moderador Join Date: Sep 2002 Location: guadalajara, jalisco, mexico Posts: 6,431	Thats right, when you design a flying wing, you want to include the elevons in chord, even if elevons are flat, I saw a report of flying W. from Spanish, and they told if you design a sweept wing youn can choose any reb, even flat bottom, I confirmed that when flew my Komet Me- 163 A of 105 gms electric motor, not fly fast but glides like a bird

Nov 20, 2002, 10:31 AM	#11
miguelAr Registered User Join Date: Mar 2002 Location: San Francisco, Cba, Argentina Posts: 1	hi, Alfredo i'm very interested, for a future project, in an electric ME-163A with good gliding ability. at this moment, i haven't found none that likes me enough. can you add some details about yours? thanks,