You can also check out Johan Hansson's original build article HERE!
The original plans, along with David's modified version, are available here:
JA 37 Viggen EDF Plans
David did a full build log article of this project! You can check that out HERE!
JA 37 Viggen
- Thread starter fliteadmin
- Start date
You can also check out Johan Hansson's original build article HERE!
The original plans, along with David's modified version, are available here:
JA 37 Viggen EDF Plans
David did a full build log article of this project! You can check that out HERE!
Foam Addict
Squirrel member
She's a beauty David, and excellent paint work Chad.
OutcastZeroOne
Fly, yes... Land, no
Very nice. I used the same hotwire technique on my very first scratch. Yours looks MUCH better then mine did 
great work. The real trick about this method is getting those parterns lined up strait on both sides of the foam. Once you got that you are good to go.
great work. The real trick about this method is getting those parterns lined up strait on both sides of the foam. Once you got that you are good to go.
aiidanwings
Senior Member
That's a neat plane, but... I kinda like this one- http://youtu.be/LDzip9s1jUQ
Foam Addict
Squirrel member
David, couldn't you have done a Tunnan?
If you want a really nice scale Tunnan - look at the MJD site http://www.mjd.se/MJD_Models/pages/j29.htm.David, couldn't you have done a Tunnan?
Made for flying and not foaming the area.
Non Action Man
Nose Landing Specialist
Have you guys seen or used this 4 axis cnc software for making models like this?
http://www.tjzoide.com/
If so, any feed back, as it looks like it could be a real good thing!
Awesome plane guys, I couldn't believe how stable it was!
NAM
http://www.tjzoide.com/
If so, any feed back, as it looks like it could be a real good thing!
Awesome plane guys, I couldn't believe how stable it was!
NAM
Last edited:
Non Action Man - thanks for the software link! That is very cool. Now to build a CNC hot wire cutter...
My Physical Science students have been "designing" high lift airfoils using a very basic airfoil simulator online from NASA called foilsim III. We export the geometry coordinates to Excel, plot them and with a bit of magic by me, end up with wing profile templates that they use to hot wire cut the shape from 8"x6"x1" foam blocks. Then, they mount them on a little wind tunnel rig I made up to test. We are wrapping this up tomorrow. Its been pretty cool.
Having a CNC cutter with this software would be AMAZING for school! Too bad our budget for the year has already been used up. I can't even get paper towels for my classroom!
My Physical Science students have been "designing" high lift airfoils using a very basic airfoil simulator online from NASA called foilsim III. We export the geometry coordinates to Excel, plot them and with a bit of magic by me, end up with wing profile templates that they use to hot wire cut the shape from 8"x6"x1" foam blocks. Then, they mount them on a little wind tunnel rig I made up to test. We are wrapping this up tomorrow. Its been pretty cool.
Having a CNC cutter with this software would be AMAZING for school! Too bad our budget for the year has already been used up. I can't even get paper towels for my classroom!
Jcrankshaw
Junior Member
How do I get these plans in a printable version? Also, will the templates be available for purchase? Beats having to cut balsa
OutcastZeroOne
Fly, yes... Land, no
You can glue the templates to some good stiff cardboard (sometiems called ship board, even good art board will work). I use 1/16" art board for all my hotwire templates. I sometiems stiffen up the edges by putting a thin bead of supper glue on the edge, especially on thin parts.
Jcrankshaw
Junior Member
I need to get the plans into a printable format...are they available in a printable format?
OutcastZeroOne
Fly, yes... Land, no
There is a link right under the video on hte original post. Looks like they are only in a full sized PDF, so unless you have the ability ot make a tiled printing, Kinkos is your best bet.
Jcrankshaw
Junior Member
Where's the CG?
Jcrankshaw
Junior Member
Someone please answer me
OutcastZeroOne
Fly, yes... Land, no
I found this image on the original build thread by Johan
If you watch the video carefully you can see them grabbing the plane by the forward wing area and having it balance there. Looks like CG should be somewhere between the tail and wing root.
I've got a plane that is also a canard style craft whos CG is a in a very similar area.
If you watch the video carefully you can see them grabbing the plane by the forward wing area and having it balance there. Looks like CG should be somewhere between the tail and wing root.
I've got a plane that is also a canard style craft whos CG is a in a very similar area.
Jcrankshaw
Junior Member
Thanks...this helps
Inspired by David's project as well, saw the video and jumped in. Well on the way now with assembly and waiting for some components to arrive. When sourcing a motor/fan combo I had trouble with so many out of stock. This caused me to take a different path and experiment with a slightly higher powered (and heavier setup). I have a Cyclone Power SMT 7010 12 blade fan with 2200kv motor. Means I will end up running 6s (probably two 3s in parallel) and getting 2200g of thrust on a plane that weighs about 200g more than Davids. Anyone try anything like this yet? I am concerned about weight, slow speed handling impact and how hot it will have to land. Loved the flight characteristics in the video and would hate to lose that...2:1 thrust to weight might rip the foam board wings off!
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