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Very Hot Topic (More than 25 Replies) Building with paper products (Read 594 times)
Too Much Glue
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Re: Building with paper products
Reply #44 - yesterday at 7:32pm
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Yes, it does look really good. You are very creative. Smiley
  
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Sky9pilot
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Re: Building with paper products
Reply #43 - yesterday at 3:36pm
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Ian,
This is really looking good.  You keep amazing me!!! Smiley
  

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Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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pb_guy
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Re: Building with paper products
Reply #42 - Jan 19th, 2022 at 9:44pm
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Working on the wing yesterday and today. The wing spar was glued in place on each wing. Both wings are at the same state. The posterboard on the one side stiffened the spar up considerably. I glued a piece of 1/64 plywood on one side of the spar before designing and gluing on the ribs. That added 0.5 grams to the weight of each wing. The root rib is a 2-piece unit, like all the other ribs with the exception of the tip rib. This preserves the continuity and strength of the main spar. I will glue another piece of 1/64 ply on the other side, on the fuselage side of the spar so that I can join the two spars in the center of the fuselage later with a strong joint.
ian
  

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pb_guy
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Re: Building with paper products
Reply #41 - Jan 18th, 2022 at 4:20pm
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We have deer, elk and black bears wandering through on occasion. We also have the usual racoons and rabbits. I haven't seen a mountain lion yet, but they are around. They take the odd dog when feeling peckish. Our neighbour had a Rottweiler that tangled with the elk. The elk tossed him over their garage and he never went near them again.
ian
  
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Sky9pilot
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Re: Building with paper products
Reply #40 - Jan 18th, 2022 at 3:09pm
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I'll show her but you've gotten me in trouble already...she loves critters.  We have a few deer from time to time that wonder through the yard but no elk.  Her sister in New Mexico has deer and wild horses that roam through their property.  She can't wait to visit her to see them!  Thanks for the pics!! Wink
  

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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pb_guy
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Re: Building with paper products
Reply #39 - Jan 17th, 2022 at 11:14pm
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She would probably like this pic of the herd walking up our driveway.
ian
  

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Sky9pilot
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Re: Building with paper products
Reply #38 - Jan 17th, 2022 at 10:41pm
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I look forward to your solution.  My wife loved the pic of the elk! Grin Wink
  

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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pb_guy
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So I'm just a kid at heart.

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Re: Building with paper products
Reply #37 - Jan 17th, 2022 at 9:57pm
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I cut a pine spar out of some old 3/16" wainscotting. It was quite good, except that each spar weighed 20 grams! I had not thought of a foam board I beam, but only the inner section would require it. I'll give it some consideration. I was planning on facing a part of the inner section spar with 1/64" plywood for added strength.
ian
  
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Sky9pilot
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Re: Building with paper products
Reply #36 - Jan 17th, 2022 at 9:38pm
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I know I'm making more work...but have you considered a foamboard "I"beam spar? I don't know if foamboard center section with posterboard top and bottom or all out of foamboard.
Sky9pilot
  

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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pb_guy
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Re: Building with paper products
Reply #35 - Jan 17th, 2022 at 5:19pm
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Having to clean up and put things away a few times has slowed me down. I finished cutting out all the wing skins. I made a couple of attempts at a folded main spar. The first attempt I mis-measured and ended up with a lop-sided spar. The second attempt I got the dimensions right. I decided to put some short pieces of C-channel inside because it wasn't solid enough in thickness (front to back). The first pic shows the inside of the spar before closing it up.

  After the pain of those attempts, I thought that I would go with Sky9pilot's suggestion of using foamboard for the main spar. The posterboard spar weighed about 2.4 g. The foamboard spar weighed 2.1 grams, and was far easier to produce, but not as stiff. The second picture shows the wing skins, the posterboard spar (yellow one at the bottom) and the two foam board spars (black).

  I also cut out two thin corrugated cardboard pieces and fitted them into cutouts in the cardboard of the fuselage for wing attachment points. This is the third picture. I won't glue them in place until I have fitted them to the root ribs and spars.

  We had some snow, and I got a pic of one of our resident elk lounging under a tree about 20 feet from our front door.

ian
  

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pb_guy
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Re: Building with paper products
Reply #34 - Jan 7th, 2022 at 3:09pm
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I dug out my digital calipers to compare the thickness of the two poster board papers. The thinner one, which I have used so far is 0.010 in. The thicker one that I am using for the bottom wing skin is 0.015 in. I will use the thinner material for the upper wing skins.
ian
  
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pb_guy
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Re: Building with paper products
Reply #33 - Jan 6th, 2022 at 11:25pm
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Ha Ha. Among clearing snow from a couple of driveways, I managed to lay out the wing patterns for the bottom of the wing. I also managed to use a Craft Razor blade to cut out everything that didn't belong, shaving it down from 20 grams to just 4.9 grams for one piece. For the wing, I bought another piece of poster board from our local craft store that is much heavier than the lighter stuff I got from the dollar store.

ian
  

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Kerak
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Re: Building with paper products
Reply #32 - Jan 4th, 2022 at 9:16am
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You keep this up, Ian...and I can see a book deal in the works...and then, and then...how about a movie!  You're going to be in demand!!!   CoolSmiley  I've seen some pretty nice paper models over the years...but you've taken this a whole step further...even several! I LOVE IT!  Your talents are showing, Ian.  Smiley Wink  I'd never paint this model...let your skills dominate for all to see...perfect colors for RAF TRAINING COMMAND.  Your work of art is a magnificent creation that ALL "artists" take pride in! (Not much pressure here.... Cheesy Smiley)

And Ian, don't for a second doubt that your creation is anything but a work of art. Beautiful.... Smiley

Neal
  
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pb_guy
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Re: Building with paper products
Reply #31 - Jan 3rd, 2022 at 11:27pm
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Thanks Tom and Neal. It certainly is far more work than using balsa (understatement of the year), but the experience is worth it. The structures are quite strong, especially when covered. The rudder weighed 3.2 grams when covered and 3.5 grams when doped (nitrocellulose). The tail feathers now weigh 11.2 grams total. The Stabilizer is 12" by 5" and the rudder is 5" by 5". I took one shot on edge to show the double-tapered edges. I am considering things that have to be done for the wing, including constructing at least one tapered box spar, and wing to fuselage attachment points.
ian
  

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Re: Building with paper products
Reply #30 - Dec 31st, 2021 at 11:48am
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I'm with Neal... amazing work folding these strips of poster board.  At first glance I thought it was extruded plastic straws.  But I've never seen square straws! Grin Cheesy Wink
This is really amazing! Smiley
  

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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