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Lazy Bee 2020

#41
Let's build a wing! Needs more ribs...
View attachment 182088

Top spars added to the center section, and the outermost rib added while the wingtip is sitting flat and before it's glued to the dihedral braces.
View attachment 182089

Gluing the wingtip to the dihedral braces and adding the outer spars - glued first to the wingtip and the outermost rib...
View attachment 182090

And then those outer spar sections are cracked at the outermost rib so they will angle down and connect to the center spar sections.
View attachment 182091
Repeat on the other side...
View attachment 182092

And then add 1/16" caps on the outermost two ribs
View attachment 182093

Almost ready to flip the wing over and do the bottom spars...
Sweet.
I see you are using a magnetic building board. Just one question:
What are those triangle thingies that you are using to keep the ribs perpendicular called? They look useful.
 

The Hangar

Fly harder!
Mentor
#42
#43
Building the wing is my favorite part. The laminated tips make the Lazy Bee wing more elegant than the usual series of scarfed straight grain pieces. Did you have to sand the lamination to match the height of the leading and trailing edges? Has anyone used the words elegant and Lazy Bee in the same sentence before? 😉
 

rockyboy

Skill Collector
Mentor
#44
Sweet.
I see you are using a magnetic building board. Just one question:
What are those triangle thingies that you are using to keep the ribs perpendicular called? They look useful.
These little building jigs are similar to the ones from RetroRC http://retrorc.us.com/buildingjigsystem.aspx - back when I had access to a laser cutter I made a couple of my own design :)

Building the wing is my favorite part. The laminated tips make the Lazy Bee wing more elegant than the usual series of scarfed straight grain pieces. Did you have to sand the lamination to match the height of the leading and trailing edges? Has anyone used the words elegant and Lazy Bee in the same sentence before? 😉
There is going to be some serious attention with a carving knife, razor plane, and sanding block to get these tips into shape - the trailing edge part of the tips especially are really tall compared to the trailing edge itself. I'm not sure how easy this is going to be now that it's all assembled, but if (when) I build a second wing I will try to take down that part of the wing tip before the glue up.
 

rockyboy

Skill Collector
Mentor
#45
I used a sharpened piece of brass tube to make some holes in the ribs right at the spar line. Anyone guess what these are going to be for? Not in the standard instructions....

PXL_20201102_184324570_copy_1024x768.jpg


Holes through all the ribs now...
PXL_20201102_190923156_copy_1024x768.jpg


One more clue - added in a piece of scrap balsa with a hole in it so the covering has a solid connection to this opening into the bottom of the wing.
PXL_20201102_191740235_copy_1024x768.jpg


Let's glue in the sheer webs to connect the top and bottom spars. This gives the wing an I-Beam structural component that is much stronger than the individual spars by themselves, and with only a small weight gain.
PXL_20201102_192740061_copy_1024x768.jpg


More sheer webbing...
PXL_20201102_195617716_copy_1024x768.jpg


If you haven't guessed yet - those holes are for lights! 12v flexible led strips that will go down the front and back side of the sheer webbing with a couple extra out at the wing tips. I'm planning for white down one wing and red down the other so I can tell if it's coming towards me or going away at night. Ask me how I know that's important.... :cautious:

PXL_20201102_185910066_copy_1024x768.jpg
 

The Hangar

Fly harder!
Mentor
#48
I used a sharpened piece of brass tube to make some holes in the ribs right at the spar line. Anyone guess what these are going to be for? Not in the standard instructions....

View attachment 182397

Holes through all the ribs now...
View attachment 182398

One more clue - added in a piece of scrap balsa with a hole in it so the covering has a solid connection to this opening into the bottom of the wing.
View attachment 182402

Let's glue in the sheer webs to connect the top and bottom spars. This gives the wing an I-Beam structural component that is much stronger than the individual spars by themselves, and with only a small weight gain.
View attachment 182400

More sheer webbing...
View attachment 182401

If you haven't guessed yet - those holes are for lights! 12v flexible led strips that will go down the front and back side of the sheer webbing with a couple extra out at the wing tips. I'm planning for white down one wing and red down the other so I can tell if it's coming towards me or going away at night. Ask me how I know that's important.... :cautious:

View attachment 182399
Lights - what a great idea!
 

rockyboy

Skill Collector
Mentor
#51
Wing is all shaped sanded and wired up.
PXL_20201108_184831214_copy_1024x768.jpg


Check this out!
PXL_20201108_190228077_copy_1024x768.jpg


Time to start the fuselage. I think the kit might be missing a part in the layout - so I cut a duplicate from scrap.
PXL_20201108_204739503_copy_1024x768.jpg


Let's lay things out and glue them up for one side...
PXL_20201108_204218138_copy_1024x768.jpg

PXL_20201108_211608986_copy_1024x768.jpg

PXL_20201108_225306898_copy_1024x768.jpg


Once that finishes drying it'll be time to flip it over and build the second side right on top of the first.
 

rockyboy

Skill Collector
Mentor
#54
Yeah, she's got a little bit of that school bus charm - but the cool old cartoon style with round portholes, not the 30 year old smelly torture chamber I remember riding in :)

So let's finish up the other side of the bus...
PXL_20201109_215316307_copy_1024x768.jpg


Hey - two matched sides now!
PXL_20201109_221818767_copy_1024x768.jpg


I'm going a tiny bit out of instruction order putting the front together... being very careful to be all square and aligned...
PXL_20201110_035209015_copy_1024x768.jpg


There we go! Axle box installed. Probably should have drilled the holes for mounting the shocks before this, but I'll make it work.
PXL_20201110_161749453_copy_1024x768.jpg


These are probably 10 or 15 mm longer than they need to be to have a full travel range, but everything is supposed to be cartoony and outsized on this anyway :)
PXL_20201110_161739672_copy_1024x768.jpg
 

rockyboy

Skill Collector
Mentor
#56
Cub yellow is pretty close to the color school buses get painted. If you really wanted the school bus look I would use that on the fuselage :p
Yeah, I've seen a couple Bee's go for that :p

I'm thinking something that will work nicely with red and white led lighting... possibly sort of translucent white covering with the traditional Lazy Bee scallops done in red.
 
#57
I'm going a tiny bit out of instruction order putting the front together... being very careful to be all square and aligned...
Are the sides of the fuselage parallel under the wing and then taper to the tail behind the trailing edge? If the fuselage begins the taper at the front of the fuselage then bulkheads are not square to the sides. They are 90 degrees minus the degrees of taper. I've made this mistake and the bulkheads were crooked.
 

rockyboy

Skill Collector
Mentor
#58
Are the sides of the fuselage parallel under the wing and then taper to the tail behind the trailing edge? If the fuselage begins the taper at the front of the fuselage then bulkheads are not square to the sides. They are 90 degrees minus the degrees of taper. I've made this mistake and the bulkheads were crooked.
Yep - that's exactly the fun about these! :)
 

rockyboy

Skill Collector
Mentor
#59
So after more reading of the plans and instructions, it turns out the sides are straight and the fuselage is rectangular in cross section, which will help simplify the next part of the build.

To get ready for connecting the fuselage sides together I'm making all of the cross pieces ahead of time and laminating the bulkheads that need that too.

PXL_20201111_213622364_copy_1024x768.jpg


As I was doing that, I found another missing piece in the pre cut sheets. There are supposed to be two F-2 pieces, and only one is in the kit. Simple enough to make a duplicate by hand though.

PXL_20201111_205750710_copy_1024x768.jpg