P09231 MSD II Spring 20083
Matt Greco: Project Manager Shawn O’Neil: Lead Engineer Will Pisarello: Electrical Systems Engineer Phil Davenport: Industrial/Process Engineer Brian Lindquist: Industrial
Engineer/Procurement Specialist Eric Lannan: Airframe Structural engineer
5lb 5lb
10lb
y
x
Balsa Material Properties
•Young’s modulus 1130 – 6000 Mpa
•Shear modulus 100 - 500 MPa
•Tensile strength 0 - 75 MPa
•Compressive strength 3.5 - 27 Mpa
Material properties from Matbase.com.http://www.matbase.com/material/wood/class4-5-10-years/balsa/properties
1
MN
MX
-696657
-558153-419649
-281145-142641
-4137134366
272870411374
549878
APR 23 200921:32:58
NODAL SOLUTION
STEP=1SUB =1TIME=1SX (AVG)RSYS=0DMX =1.542SMN =-696657SMX =549878
1
MNMX
X
Y
Z
-93015
-69725-46435
-23144145.674
2343646726
7001693306
116596
APR 10 200908:59:29
NODAL SOLUTION
STEP=1SUB =1TIME=1SX (AVG)RSYS=0DMX =.248992SMN =-93015SMX =116596
Flight Observation Probable Cause Actions Taken
Wing sheared off during flight
Purchased ply cut on RIT laser cutter is 3 layer, compared to 5 layer ply cut by Foxlite, Inc.
Absorption and cure times increase for plywood applications
Change ply adhesive to Gorilla Glue
Redesign wing to accommodate double brace thickness and top sheeting
Cyanoacrylate (CA) adhesive was more effective in balsa joints than ply joints
Epoxy found to not completely cure
Enables onboard control switching between two pilots or a single pilot and an autonomous system
Uses:- Autonomous system testing with pilot backup- Control ‘hand off’ between pilots a significant distance apart
for extended range flights
~$50 total per system.
Airframe A Segregated Budget
Raw Airframe with motor Component Qty Piece Price Total PriceMotor HXT42-60 1 $ 35.79 $ 35.79 Landing Gear 1 $ 25.27 $ 25.27 Linkages, Connectors, Hinges, misc 1 $ 50.00 $ 50.00 Purchased Wood 1 $ 25.00 $ 25.00 Propeller 1 $ 1.00 $ 1.00 Covering 1 $ 5.00 $ 5.00 Composite Material 1 $ 5.00 $ 5.00
Subtotal $ 163.56 ElectronicsServo S3010 2 $ 19.99 $ 39.98 Receiver Supreme 28 LXKYK3 1 $ 39.99 $ 39.99 Servo S3114 2 $ 14.99 $ 29.98 Speed Controller 1 $ 16.79 $ 16.79 Battery eliminator circuit 1 $ 19.95 $ 19.95
Subtotal $ 146.69
Airframe without batt $ 293.75
BatteryLithium Polymer 1 $ 45.11 $ 45.11 Telemetry (Optional) 1 $ 627.97 $ 627.97
Total $ 338.86 w/Telemetry $ 966.83
Date Amt Desc1/6/2009 $ 627.97 Eagle Tree, Telemetry System
1/19/2009 $ 276.18 Tower Hobbies, remaining mat $ 93.00 ACP-Composites $ 18.00 Digikey, control switch
1/28/2009 $ 75.20 National Balsa1/29/2009 $ 104.76 HobbyKing, 4 batts
$ 93.30 HobbyKing, electronics $ 50.00 FoxLite, laser cutting
2/6/2009 $ 66.05 Performance Hobbies, misc $ 9.77 Home Depot
2/20/2009 $ 41.69 Performance Hobbies, misc2/26/2009 $ 364.51 Tower Hobbies, stock
$ 77.56 National Balsa, stock $ 318.09 Hobby King, stock
3/11/2009 $ 82.44 PCB layouts3/13/2009 $ 11.86 Home Depot3/18/2009 $ 12.58 Tower Hobbies, crystal
$ 134.90 Boosterworks, camera $ 89.86 Dan's Crafts
3/23/2009 $ 42.12 Digikey, parts for pcb3/24/2009 $ 60.78 National Balsa3/26/2009 $ 73.95 Tower, clear coat, receiver
$ 75.75 Hansen Hobbies, cables3/30/2009 $ 33.47 Michaels, Balsa sheet
4/3/2009 $ 82.44 Performance Hobbies, rcvr crys $ 156.23 Dan's more materials $ 16.66 Home Depot
4/11/2009 $ 35.34 Performance, props & gear4/14/2009 $ 69.78 National Balsa
$ 11.42 Magnetics4/21/2009 $ 195.25 HobbyKing, replacement batts4/23/2009 $ 27.00 Balsa for new wings
Total As Of 5/12/2009 $ 3,427.91