**E178: Lab 2 Final Assembly Level 1** |[home](../index.md.html)|[syllabus](../syllabus.md.html)|[assignments](../assignments.md.html)|[labs](../labs.md.html)|[final project](../finalproject.md.html)|[flight data](../FlightData.md.html)|[getting certified](../RocketryCertification.md.html)| # The [LOC Precision 1.6" Weasel Kit](https://locprecision.com/products/weasel) Detailed assembly instructions are at [Weasel Basic Assembly Instructions](../CardboardWeaselRocketAssembly.md.html). Some more details, including the list of supplies are in the [Flight Hardware](../FlightHardware.md.html) page. # Final Assembly. Follow the steps in the [Weasel Basic Assembly Instructions](../CardboardWeaselRocketAssembly.md.html#finalassembly) - [Epoxy in the motor-mount assembly](../CardboardWeaselRocketAssembly.md.html#finalassembly/insertingthemotormountassembly). - [Attach and fillet the fins](../CardboardWeaselRocketAssembly.md.html#finalassembly/fins). - [Attach the launch lugs](../CardboardWeaselRocketAssembly.md.html#finalassembly/launchlugs). - [Attach the chute protector, the parachute, and the payload section](../CardboardWeaselRocketAssembly.md.html#finalassembly/chuteprotectorandparachute). !!! warning You **MUST** label the center of pressure of your rocket with a center-of-pressure symbol, which is a circle with a dot in the middle, $\odot$. Use either a hand drawn bullseye, or a waterslide decal CP symbol. The finished rocket will be assessed according to the following rubric: Score | Description ------|------------ 5 | Components in the correct places and square. Epoxy joints neat and reasonably smooth. Fillet large enough, smooth, and with sharp lines. All joints mechanically sound. CP labeled correctly. Name & phone number on both payload and body tubes. 4 | Components more-or-less in the correct places and more-or-less square. Epoxy joints not too messy. Fillet almost large enough, fairly smooth, and with fairly sharp lines. Most joints mechanically sound. 3 | Some components in the wrong place and/or noticeably tilted. Epoxy joints moderately sloppy possibly with gaps. Fillet almost large enough, not smooth, and without sharp lines. Some joints mechanically sound. 2 | Most components in the wrong place and/or noticeably tilted. Epoxy joints sloppy possibly with gaps, some epoxy drips. Fillet irregular, not smooth, and without sharp lines. Few joints mechanically sound. 1 | Serious questions about component placement. Epoxy joints really poor, possibly with gaps, frequent epoxy drips. Fillet very irregular, rough or wavey, and hardly defined. Serious questions about mechanical integrity. # Avionics Bay Support As part of Lab 2 you need to assemble the avionics-bay support. The support pieces are laser cut from 1/8" Baltic Birch plywood, and need to be assembled with wood glue. You may possibly be given the laser-cut parts, or you may need to cut them yourself. The assembly instructions are [here](../CardboardWeaselRocketAssembly.md.html#finalassembly/theavionicssupport). You may have to find some way to support the centering rings to keep parts square while the glue dries Your completed assembly will be assessed according to the following rubric: Score | Description ------|------------ 5 | Parts assembled and glued together properly. Parts are square. Avionics Support fits your rocket. 4 | Parts assembled and glued together mostly properly. Parts are mostly square. Avionics Support almost fits your rocket. 3 | Parts assembly and gluing of inferior quality. Some parts are square. Avionics Support poorly fits your rocket. 2 | Parts assembly and gluing of inferior quality. Few parts are square. Avionics Support doesn't fit your rocket. 1 | Parts assembly and gluing of unacceptable quality. No parts are square. Avionics Support doesn't fit your rocket. For collecting your own flight data on an F motor, or to cert Level 1, you will need to use the avionics bay support, and attach a Featherweight GPS Tracker, a Teensy Small Board system (or replacement such as a Raven 3 or a PNut), two switches, two 1S 400 mAh LiPo batteries, assorted fasteners, and four strips of Velcro. If you want or need to cut your own avionics bay out of 3 mm plywood, the PDF files for the laser-cut parts are in [this archive](../SolidWorks/Weasel/PartsForCutting2024.zip). If you want to modify the parts, the Solidworks parts files are in [this archive](../SolidWorks/Weasel/WeaselElectronicsBaySupports.zip). The files have been parametrically designed, so that you can change the parameters to fit your rocket if your measurements differ. More explicit instructions for the parts are [here](../SolidWorks/Weasel/CuttingTheWeaselAvionicsBayParts.md.html). # Avionics Installation The avionics do not need to be installed for the Lab 2 check-off, but they will need to be installed, tested, and inspected if you plan on flying your rocket. The detailed instructions are [here](../CardboardWeaselRocketAssembly.md.html#finalassembly/avionicsinstallation) # What to Turn In Bring your completed rocket to class. I will inspect the sub-assemblies during the due-date class period and return them to you immediately.