Monster sized Fock-Wulf FW-42
- Thread starter rockyboy
- Start date
Looking good man.Good thinking on the router.
Thanks! Idea stolen from DamonRC over on the other forum
So I finished up all the routing last night and put the glue on the side pieces. Tonight it'll be on to gluing in the ribs!
PsyBorg
Wake up! Time to fly!
If you can not get that out of your head then my job here is done and is a success. The Target was for Rockyboy to have that but Ill take a secondary hit success!
PsyBorg
Wake up! Time to fly!
This is just the wing section that gets mated to the part attached to the fuselage already correct? How much more wing area will be added after this to shape the tips? This is getting to be a size that could potentially be used as a hang glider should you wish to re purpose it after the contest hehe.
Yeah, 104" or 8'-8" or 2641mm of wing is pretty freaking huge.
There will be 3 wing sections overall - the center wing section that will be permanently mounted to the fuselage is 32" and this box is 36" wide. I'll be slicing the box in half horizontally to give me to matched but thinner boxes still 36" wide, and then cutting both of the side panels from there.
I wasn't planning on any additional extensions for the tips, but I still need to see how it looks when it's all cut up - it might need a few extra inches of foam for shaping out at the ends. And I really need to take my time and make sure I don't cut two right side wings by accident
There will be 3 wing sections overall - the center wing section that will be permanently mounted to the fuselage is 32" and this box is 36" wide. I'll be slicing the box in half horizontally to give me to matched but thinner boxes still 36" wide, and then cutting both of the side panels from there.
I wasn't planning on any additional extensions for the tips, but I still need to see how it looks when it's all cut up - it might need a few extra inches of foam for shaping out at the ends. And I really need to take my time and make sure I don't cut two right side wings by accident
And... are you using gorilla glue for those joints? Just curious.
I'm using the brown gorilla glue for all the foam to foam joints, and the foam to outer wing tube as well.
The foaming action is especially handy on the ribs since the router bit I used to cut the slots is about 2mm wider than the ribs - but the gorilla glue nicely makes up for the difference
Interesting. I guess since you are using pressure to make the layer of glue super thin it would not interfere with a hot wire cut. I've personally never tried. I've been meaning to try Glidden Gripper paint as a foam adhesive as I've heard it works well to bond foam and easily hot wire cuts.
The hotwire did slow down when going through the gorilla glue, but it worked! I used the Glidden Gripper on sticking the fuselage layers together, and it also cut just fine with the hotwire.
The weird thing I noticed with the Gripper is that only the outer 2 inches or so of the paint actually dried properly - the stuff that was in the center was still wet three or four days later when I cut it. The newly exposed edges did dry up nicely and it's all held together very securely - but it was a surprise. Maybe I put down too thick of a layer of the paint, or needed to let it air dry for a while like contact cement before clamping the parts together.
This evening I flipped the wing box over and use gorilla glue on the final set of joints for the ribs and trailing edge. You can see some of the mess on the main spar line where I got impatient and did the glue joint last night where it was upside down and dribbled down the ribs a bit.
Last edited:
And here's the part where I realize I made a big mistake.
Wing taper. Forgot all about accounting for that in the shape of the box. Here are the three rib shapes that I need to cut and it's pretty obvious this ain't working with a square box. *sigh*
The nice thing about mistakes in foam is it's pretty quick to make changes. So first I cut the box in half where the taper changes shape. Then I cut the end of the ribs off at the trailing edge and reglued it at the proper angle. Those rib joints are going to be pretty messy, but hey - it's all getting covered with foam sheeting so what the heck!
Wing taper. Forgot all about accounting for that in the shape of the box. Here are the three rib shapes that I need to cut and it's pretty obvious this ain't working with a square box. *sigh*
The nice thing about mistakes in foam is it's pretty quick to make changes. So first I cut the box in half where the taper changes shape. Then I cut the end of the ribs off at the trailing edge and reglued it at the proper angle. Those rib joints are going to be pretty messy, but hey - it's all getting covered with foam sheeting so what the heck!
Last edited:
A top curve...
And then one section is done!
And another...
Right wing panel all cut out...
And the left too!
Dang that's big - so big I can't assemble it all with the 32" center section in my shop. Going to need to be careful about the hangar rash while working on this...
And then one section is done!
And another...
Right wing panel all cut out...
And the left too!
Dang that's big - so big I can't assemble it all with the 32" center section in my shop. Going to need to be careful about the hangar rash while working on this...
Thinking about the next couple steps here...
- Sand off the rough spots on the new wing panels
- Cut off trailing edge of inner panels and replace with balsa strip
- Cut off trailing edge of outer panels, add framing for ailerons
- Glue fan fold bottoms onto wing panels
- Measure and make jig for slight polyhedral angle on wing tips
- Cut holes for wing tubes
- Install alignment tubes and pegs
- Cut holes and install wiring tubes to aileron servos
- Install framing for aileron servos
- Glue on top fan fold panels
- Sand wing section roots to create proper angles
- Glue outer wing sections together
- Weigh all the parts of the beast
- Figure out power system
- Sand off the rough spots on the new wing panels
- Cut off trailing edge of inner panels and replace with balsa strip
- Cut off trailing edge of outer panels, add framing for ailerons
- Glue fan fold bottoms onto wing panels
- Measure and make jig for slight polyhedral angle on wing tips
- Cut holes for wing tubes
- Install alignment tubes and pegs
- Cut holes and install wiring tubes to aileron servos
- Install framing for aileron servos
- Glue on top fan fold panels
- Sand wing section roots to create proper angles
- Glue outer wing sections together
- Weigh all the parts of the beast
- Figure out power system
