RE: Rollin' my own 50CC Yak 54  
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RE: Rollin' my own 50CC Yak 54 - 11/30/2005 7:26:23 PM   
SydDythers



Posts: 568
Joined: 1/21/2002
From: Toronto, ON, CANADA
Status: offline 		Brent,

Looks I'll be doing the stringers/sheeting method. Basically, I have no idea on how to make those foam cheeks and I prefer stringers anyhow. Weight difference should be negligable if done correctly.

Cheers,

John

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RE: Rollin' my own 50CC Yak 54 - 11/30/2005 7:39:21 PM   
SydDythers



Posts: 568
Joined: 1/21/2002
From: Toronto, ON, CANADA
Status: offline 		I will be starting the wing soon and have measured up the EF Yak's wing. Best I can tell is that it uses a NACA0013 on the root and a NACA0014 on the tip. I think I'll copy this arrangement in my scratch design since I never, ever, manged to once tip stall or snap the EF Yak. Very stable wing indeed. I considered the eppler 169 but in the end decided that I wanted to be able to do some IMAC type stuff on this bird as well and the 169 is just to thick of an airfoil.

Cheers,

John

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RE: Rollin' my own 50CC Yak 54 - 11/30/2005 9:34:26 PM   
Brent G



Posts: 416
Joined: 3/31/2004
From: York, SC, USA
Status: offline 		I am planning on going with the stringers also. It should be a little lighter. To do the foam cheeks all you need to do is make templites like you would for cutting out a foam wing. You just need to compensate for the sheeting thickness when you make the end templates.

Brent

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RE: Rollin' my own 50CC Yak 54 - 12/1/2005 12:39:42 AM   
SydDythers



Posts: 568
Joined: 1/21/2002
From: Toronto, ON, CANADA
Status: offline 		Ha, that would make sense to me if I knew how to cut foam wing cores! Brent, I just purchased the compufoil3d program but am dissapointed that it doesn't have naca0013 or 0014. I didn't purchase the modification module and I was wondering if you were able to make a .cor of those to and send them to me?


OOOPS stupid me, I did buy the naca generator module....forget my request

Cheers,

John

< Message edited by SydDythers -- 12/1/2005 12:42:41 AM >

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RE: Rollin' my own 50CC Yak 54 - 12/1/2005 1:11:47 AM   
Brent G



Posts: 416
Joined: 3/31/2004
From: York, SC, USA
Status: offline 		I have the modification module with mine. I just modify the airfoils to what ever spec I need.

Brent

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RE: Rollin' my own 50CC Yak 54 - 12/1/2005 2:27:56 AM   
SydDythers



Posts: 568
Joined: 1/21/2002
From: Toronto, ON, CANADA
Status: offline 		Hey brent, do you know how to export a 3D .dxf with not only the rib templates but also showing the stringers, LE spars etc...? Is it possible or can I only export the templates?

Cheers,

John

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RE: Rollin' my own 50CC Yak 54 - 12/1/2005 12:05:03 PM   
Brent G



Posts: 416
Joined: 3/31/2004
From: York, SC, USA
Status: offline 		John

I am not sure if that is possible. With the dxf module I can import the ribs and planform into my model cad software. If you give Eric Sanders a call at compufoil I am sure he will be able to answer your question. He has helped me several times in the past. Great customer service!!
I am waiting on some new cad software. I orderd design cad max 14. It looks like it should serve my needs. The price on e-bay was right, $16.99. If it doesn't work like I need at least I am not out a lot of money.

Brent


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RE: Rollin' my own 50CC Yak 54 - 12/1/2005 8:46:38 PM   
SydDythers



Posts: 568
Joined: 1/21/2002
From: Toronto, ON, CANADA
Status: offline 		Put an email in to Chris and am waiting for a reply. I managed to make my own stringers. Here is the latest progress...starting to look like the innards of a yak!

Cheers,

John

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RE: Rollin' my own 50CC Yak 54 - 12/2/2005 1:10:21 AM   
Brent G



Posts: 416
Joined: 3/31/2004
From: York, SC, USA
Status: offline 		I just got my design cad software. This should be fun. I am used to doing things 2D, I am finding out that 3D is totaly diferent. Any tips on where to start would be greatly appreciated. I tried using my other drawings to build the 3D model from, with no sucess. It looks like I am on the steep part of the learning curve once again.

Brent

O-buy the way. The plane looks great!

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RE: Rollin' my own 50CC Yak 54 - 12/3/2005 1:07:56 AM   
SydDythers



Posts: 568
Joined: 1/21/2002
From: Toronto, ON, CANADA
Status: offline 		Brent,

I just found 3 views on the net and then used the cad program to trace the profiles. Then I built up the airplane as you can see at the beginning of this thread. I ended up finding a copy of autocad for dummies in pdf format on the net and read through that for the first couple days. It seems you and I are on opposite ends of the spectrum...I have no idea how to build a 2D set of plans!

Cheers,

John

Latest progress:

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< Message edited by SydDythers -- 12/3/2005 1:09:21 AM >

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RE: Rollin' my own 50CC Yak 54 - 12/3/2005 2:31:58 AM   
Brent G



Posts: 416
Joined: 3/31/2004
From: York, SC, USA
Status: offline 		John

I am starting to get the hang of it. It sounds like I did the exact thing that you did. I found 3 views and traced them. It has been interesting learning how the 3d cad stuff works. This is my first wire frame drawing. I am just getting the feel for it. Next I will be going back and making a better to scale drawing.

Brent

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RE: Rollin' my own 50CC Yak 54 - 12/3/2005 4:22:57 AM   
Looper


 

Posts: 50
Joined: 1/5/2002
From: Archbald, PA, USA
Status: offline 		Hey guys...keep up the great work. Your progress is really interesting; especially for a Yak fan like me. I would love to build one...thanks again, Looper

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RE: Rollin' my own 50CC Yak 54 - 12/3/2005 5:56:01 AM   
SydDythers



Posts: 568
Joined: 1/21/2002
From: Toronto, ON, CANADA
Status: offline 		Brent...you're on your way! Acad is a beast to master and I can't think how it could get any harder than this program so if I can do it in Acad, then anyone can! It is truly 3D UNfriendly as far as I am concerned. My next project will probably be done in something other than Acad. I can say however that it forces you to be extremely precise (tolerances are within .0001 inches) and that is good.

Looper, thanks for the encouragement. This project has come a long way from when I first posted. It sure is time consuming though! I am hoping to have the cad done within a couple of weeks and have it built within a couple of months...although February is not exactly prime time for maidening an airplane in Canada I am considering getting a bunch of these kits laser cut and selling them if it flys well. I would probably provide the plans for free but am worried that I would suffer the same fate as Silver Eagle here on RCU...at least I think that was his handle...who had his katana plans sold on EBAY by somebody who ripped them off.

Cheers,

John

< Message edited by SydDythers -- 12/3/2005 6:20:39 AM >

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