SydDythers

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That's great HighFly!


For precision flying I think you are better to go with a thinner rather than thicker airfoil which helps you do snaps and increases your roll rates, unless someone can say otherwise. So you may want to design two wing sets, one for 3D and one for IMAC. One can get decent results creating an in-between type of wing and it will fly in both conditions very well but not as good as it could be.

You can't go wrong with a NACA airfoil. Maybe a Naca 0012 or 0013 would do the trick for an "in-betweener". Brent had a good idea about building in some dihedral into the wing by making the top surface flat (i.e. the widest point on the outboard tip is parallel to the widest point of the wing's root. This would help stabalize things a bit more. I should mention that I do not use a straight vanilla naca 00XX but rather a modified naca 00XXYY airfoil. I am not in front of my CAD PC so I can't remember of the top of my head what the full numbering is but I'll get back to you on that.

I don't believe tailplane airfoils really matter too much as it relates to aerodynamics. You might consider just building them flat if you don't mind the non-scale appearance. Otherwise, just play around with your airfoil program until you get something that looks about right (again a naca foil should do the trick).

Might I suggest you try an Edge 540 first? The 540 fuselage is way easier to model than the roundish 330. I attempted the 330 once and got too frustrated to go much further than a couple hours of work. The Yak's fuse is also quite easy to create.

Best of luck and post some pics!

John

**Edit: Ok, I looked it up and I am using a NACA 0012-53 on the root which is lofted to a NACA 0013-53 at the tip of the wing. The reason for the wider wing tip is to improve the stalling/anti-snapping characteristics of the wing. This is good for 3D but not so much for IMAC. So for IMAC purposes, I'd use the same 00xx through the whole wing.

highfly3D

Hello SydDythers

Thanks for your valuable advice, the reason why i am not going for the Edge 540 is te Extra flies better than the Edge when it comes to IMAC and also for 3D, i am building this model for my next years comp, also the reason to design and build a plane like this gives an advantage to modify it and build it as light weight as possible as my Dad always says "build your own plane" since the begning he never allowed to by and ARF also ARF in 90s were quite expensive, and i thank my dad today for because of him i have learned to design build & fly RC airplanes, i will post some picks of my progress work soon, but i think i may need your help for designing the wing with the Wing Tube holes in it.

Highfly3D.

highfly3D

hi SydDythers

i am almost done designing the fuselage sides working on the wings and the tailplane. will post some pics next time.

Highfly3D.

USAce777

Hey SydDythers.
I kinda got back to solidworks...i love it!!
Just basically fooling around with it.
I just got a couple of questions if you could help me,
you said in the beginning, when you start designing a plan,
you loft it... can you please explain more detailed what you meant by that.
I've tried to loft, but couldn't figure it out.
Basically what I have been doing is plotting points in a 3 view, in 3D. Is it any close to it?

Thanks
Gleb D.

SydDythers

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Hi Ace,

Hope you are having fun learning SW [&:]

Lofting is the process of creating a solid out of two or more profiles.

Basically, to loft a fuse, imagine you slice it every 6 inches for example (could be any number tho). If you were to look at each slice, the outline/profile of the fuse at that particular location can be observed. So, if in SW you recreate these profiles every 6 inches you can then tell the machine to interpolate between each profile. That is lofting and it definitely requires a bit of an artist's touch to get everthing just right.

The first pic shows how the three profiles that I used to create a cowl. Notice that there are lines that run from the front profile all the way to the back. These act as general guides for the lofting.

The second and third show a whole fuse lofted. I actually lofted seperate sections of the fuse and then knitted them together to get the final product. It takes a bit of imagination to get it but it becomes old hat after a while.

Best of luck!

John

USAce777

Thanks Syd!

But, ok, you've made the loft but how do you plot the points for the fuse formers?
Do you just do it by your eye, how you see it, or...

The help is truly appreciated!!
Thanks

SydDythers

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Ok, assuming you have lofted and shaped the fuse to your satisfaction, then choose where you want to make formers and then create drawing "planes" at these positions. Then all you do is start a sketch on the plane and then choose "intersection curve" in the Tools/Sketch Tools menu. Then click on the fuse's surfaces you lofted and the outline of the fuse is automatically drawn on the screen! A former is born...

Hope the pic is clear

Brent G

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4 more yak kits should be at my door today. I have all of them sold. Bad thing is I have t build 3 of them for guys and I am short on time. Got all the resizeing done so these should fit even better than the first one. I am now cutting all the foam parts. I have all the wings cut and the turtle decks. I will post some pics when I start the sheeting this weekend.

EXTREME3DRC

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Brent, Do you have any plans for a small lightweight Yak54? I been wanting one for a while around 50" but dont want to buy any arfs...

SydDythers

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Extreme,

I have a 38" designed and suitable for a 400 size electric motor if you are interested. You would be the guinea pig I am afraid since I haven't actually built it yet. I suppose you could scale it to 50" with a bit of work. Very light anyhow.

J

Brent G

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I don't have any designes for something that small. I have been playing with the idea of doing one in the 40" size for an electric. For right now I am working on the giant stuff. I have 6 of my planes sold and at least 2 more ordered. I hope these planes fly good! All the guys are ordering them based on how my smaller yak flies. I am also working on scaleing up my designe for an 80cc engine. The plane should be around 98" ws and it sould weigh around 20lbs.

I have spent the last 2 weekends cutting foam parts. Every thing looks great. I have one more fuse to finish frameing up. It takes me about 2 hours to build the fuse. I will be posting some pics of the fuse and the sheeted foam parts soon.

Brent

guepardofach

Hello, I need a design of an extra 300l cowling made in solidworks, or how to make it in that software.

It's very urgent.

Thanks a lot for any one who can help me in that

Sebastián

SydDythers

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Pretty tough to design one when we don't have an idea of what the fuse profile looks like. Anybody can design one but it may not fit your application very well without this info.

SydDythers

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Well, I finally got around to makinng a cutsheet of my mini-eYak. About 39" wingspan and should weigh about 22-23oz all up. Not too shabby and about on par with a mini funtana weight and dimensions wise (although my yak has a larger wing area). Construction should be easy. Even the wing and turtle deck skins are precut. Got a quote from my cutter which is reasonable and puts the total cost after covering and other accessories about 10-15% cheaper than the funtana.

I was also having some fun with the Photoworks rendering package in SolidWorks. The DA50 looks pretty good I think?! And no, I will not be using that on the eYak

Cheers,

J

Brent G

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John

Looks pretty cool. I have been working on getting some of these planes finished. Here are some pics of the progres so far.

Brent

SydDythers

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Very very nice Brent. Those guys look like they are getting a hell of a deal! When did you get into the ARF business anyhow?

J

mmattockx

John, are you selling kits for this one? Looks like a nice little hand launch machine.


Mark

Brent G

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It was totaly by accident!!!!! I realy don't have the time to be building all these planes. I have 2 more ordered for this summer and 1 more after the guy sees it fly. If guys want one from out of my area they will have to do the sheeting themself. I am planning on having the foam parts cut by a foam cutter. The foam parts will be shipped seperatly from the rest of the kit along with a parts list for tubes, gear ect. I have 3 fuses framed up now. I am putting the second set of wings in the bags tonight. Once I get the stab tubes then I can start sheeting the tail section. Tooooo many planes. It is turning this little hobby into work.

I'm tired, and the season is just starting.

Brent

SydDythers

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Hey Mark,

No plans to sell personally as this is just a hobby for me but if you are interested in getting one cut, I can put you in contact with my cutter. It would happily hand launch and land without landing gear I suppose. I know the pic doesn't show it but it has been designed to utilize the mini funtana's landing gear of which I have a couple spare lying around. I still need to figure out what to do with the canopy but I will probably sand/carve a piece of balsa to vacuum form some plastic.

Brent,

At least your season has started!! Our field is still covered with a bit of snow and a lot of water! Who are you using to cut foam? I'd like to go that route for the turtle decks. Your canopy looks a lot like mine....is that BME's?

Cheers,

John

Brent G

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John

Here is the web site for the foam cutters. http://flyingfoam.com/launch.html

The only thing they said they couldn't cut is the foam cheeks. I may do a built up cheek in the future. The canopy is for the 25% great planes yak.

Later,

Brent

mmattockx

Hey John,

If I order the parts from your cutter, will you supply a set of plans for it? Even in dxf or pdf is fine and I can take care of printing them on this end. If it is designed for gear, I would use them. I was just going from what I could see in your pic...PM me if you want to take this off line.


Mark

SydDythers

My Feedback: (5)

Hey Mark,

Sent u a PM.

A pdf of the plans is no problem.

Cheers,

John

SydDythers

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Hi Mark,

I sent the .dxf version of this pic to you.

Cheers,

John

mmattockx

Thanks, John. The e-mail I gave you is my work address, I will check it out tomorrow.


Mark

USAce777

Hey Syd.
Thanks for all the help before.
I've been fooling around in SW, well not much progress...

I got a question for you, idk if you could help me.
I got a problem that when I Loft a separate section, it comes out good. But if I loft another section from there, it comes out all messed up and such. The pictures show it, I hope. (The plane is supposed to be Bf-109, does it look any??[])
If you have any idea why, or how can I fix this please tell me.

Another question I have is, after you made all your formers, how do you run stringers along the fuse. I understand that you have to extrude them, but how do you sketch them?

Very much appreciated!
Thanks