![]() ![]() You want a nice, even coat on both members, and don't apply too much. Unscrew the applicator from the can and wipe it on the edge of the can - the applicator tends to pick up way more cement than you actually need, and you don't want to waste any, do you? Spread the cement on the inside of the T adapter, and on the outside of whatever you're putting inside the adapter. To use ABS cement, first try and make sure that your surfaces are nice, clean, and smooth. You might want to wear a respiratory mask and GLOVES for this one, too - that cement stuff is narsty! In this case, we're going to take the 4" pipe and cement it to the base of the "T", and on each side of the "t" we'll cement in a 4"-2.5" adapter and half of the 2.5" pipe (2' in each side). Sounds like a job for the Rotating Arm Holder! Get your ABS T-adapter, 2 sections of ABS pipe, and ABS cement. Now that we have a nice, smooth axle, we need something that will rotate about the axle and hold the arm. Add a ton of padding to the cross brace - you'll need this if you don't want the catapult/arm to break. Also, on one side, install the other U-bolt, facing inwards, through one of the posts - this will be a tie-off point. It's pretty scary when one of those snaps at full tension. Our tubing ripped a few times because the holes had sharp wood daggers eating the tubing. This is there the surgical tubing will go, so try and make it nice and smooth. say 1.5") holes into the cross-brace on both sides. Turning lag bolts in 4x4's is pretty annoying, isn't it? Drill two huge (but not too big. Keep turning until the little pointy part sticks out of the other end of the wood, then re-clamp it and finish up. You can take it down from the posts now if it makes it any easier. Now, start screwing your lag bolts into the cross-brace piece. The cross-brace's top should be flush with the top of the two posts, and should be closer to the shorter side of the base of the frame. To install a cross-brace, first pre-drill four holes in that leftover 3' 4x4 that you cut earlier (two on each side), after clamping it to the top of the two 4x4 posts we put up in the last step. Otherwise, follow the instructions below. If you don't want a cross-brace, you'll have to get two more u-bolts and bolt them to the top of the posts so that they face eachother. If you want to go true catapult, the cross-brace is essential, but I highly advise against it. Later on, we found that this really didn't work, and ended breaking a really nice fiberglass pole because of it (and the insane momentum it had). Cyano glues add weight unless used very skillfully.So we originally planned to have a cross-brace, which would stop the catapult arm from aiming down and force the release of the projectile at a 90 degree angle to the ground. Note: Cyanoacrylates (CA, Super glue etc.) may work but are dangerous and not suitable for children. Otherwise it’s excess weight and can take hours to dry. Put a blob on the glue stick cap and use a toothpick to transfer it to the model (see video). Less is more! If the right amount of glue is used it will dry quickly. You’ll use two of the 2″ (5m) balsa strips.ĭon’t apply craft glue directly from the bottle. ![]() It’s important that the wood parts are actually glued. Craft glue holds the wood two wood connections. In this step you will use craft glue and glue stick. Glue it on the furthest edge of the tissue. Roughly center it so there’s at least two inches of extra tissue on each side. Glue Stick a thin 12″ (30cm) balsa strips to the tissue as follows. You can share your glue and scissors this way. Section 1 (furthest from you): Drinks, parts, glue and scissors. This helps share glue with other Squirrel makers. Step 1: Lay out Parts and TissueĪrrange your work-space into three sections as shown in video. The elastic band motor is not an ordinary office elastic band so ask your hobby store about it. Visit hobby and craft stores for raw materials. Working from scratch (without a kit) requires tools for cutting. There is also a new Squirrel Instruction Sheet. You’ll need scissors, glue stick (optional but saves a bit of time if used where called for) and craft glue (any carpenter or white glue). No experience necessary if working from a kit. Follow the video below and your plane will be awesome.
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