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SESSION OBJECTIVES | Guide | Result |
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Frame shape | Rectangular carbon fibre frame is popular (twin boom model). provides stability to quad frame Single fuselage easier to handle centre of gravity calculations | twin boom
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Cabin layout: barbies + batteries | 6 barbies. Pick dimensions, figure out loading mechanism and way to secure them in seats | batteries are not in cabin. just barbies. cabin that has a door on one side that opens to 3 rows of 2 barbies each 1kg of barbies plan for flat top of cabin. rounded sides. flatness of bottom depends on landing gear attachment door that swings down and becomes steps. 3 barbie seats wide |
Batteries | possibly custom lithium ions. Whether or not they need to get replaced. on top of fuselage/somewhere else This means they can
need some power in the plane while the batteries are getting swapped. for ZP3, the passover is where 1 battery is swapped at a time. Want to be able to quickly change batteries in Task 2 | |
Airfoil shape | Will require some research. Actually do some of the research here (just pick one from a website probably) | Looking at model RC airfoils not passenger planes Naca airfoil https://en.wikipedia.org/wiki/NACA_airfoil airfoil/exact wing shape can be changed, make the joint universal
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Materials/mass for each part of plane | Carbon fibre. what portion of the plane will be carbon fibre? And how feasible is it to manufacture this in 6 weeks? (or should we go for entirely foam wings etc) | carbon fiber - find sponsor for chemicals will not be done for 6 weeks. use prototype materials:
3.3 kg of electronics leaves 1.7kg for entire airframe. 1kg of barbies |
Locations of motors | Just put numbers to the dimensions, like how far forward the motors should be. DON’T assign this for research later, do research now and take the best guess (think about general prop size) Also consider push motor location | depends on COM |
Scale of plane | Wingspan, nose-to-tail dimensions. Remember more wingspan adds more weight. Ideally between 2-3 meters. | 30 inch fuselage, 10 inch square. 80 cm fuselage, 25 cm square (height and width) wings 2.4 meters 40 cm wing chord |
Landing gear | VTOL, so relatively basic landing gear. how it attaches/ where it attaches | centered around COM, close to it. Not to overlap with landing pad edges helicopter skid idea Decide later for exact numbers. off the shelf would be structurally nice |
Control surfaces | Decide which ones we need. Rough estimates of sizes of each (websites will estimate this fast for us) | use websites to calculate estimations based on wingspan and wing areas. structurally flaps are between boom and fuselage |
INTRO to mass budget | (will not have finalized. but crunch some densities or whatever and find a number for an empty frame) | not rn |
CAD and assigning tasks - project manager for MAIN CAD ASSEMBLY is Conall Kingshott. This means if there are new parts to push to the assembly, he’s the go-to person to help with this, and he manages how the parts integrate w/ each other
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FOLLOW THE NAMING SCHEME 🙏 CAD Guidelines
Come to the CAD sessions this week! Every evening from monday-wednesday from 7-9:30pm !! drop in so come when you can, leave when you need to, Megan Spee will be running them in-person @ bay and Matthew Visser running joint ones online simultaneously in #mech VC
Make a task list RIGHT NOW on the google sheet. sign up for things!
Inside fuselage
door
stairs
attachement to wing spar
bottom camera (how to implement - drilling hole)
front camera
landing gear
seats for barbies attached
lights around fuselage
wire routing
electronics
batteries on top
hardware in fuselage: electronics and sysint
PCBs
?? check
This week, besides CAD
Motor, battery, prop calculations coming up
CoG calculations etc coming up
Ground tower architecture coming up
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