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Robert's Rocket Project
Space Access '16 ConferenceApril 9, 2016
www.watzlavick.com/robert/rocket
Vehicle OverviewThrust 250 lbf sea level
Propellants LOX / Kerosene
Isp 210 s
Mass flow rate 1.19 lbm/s
Dry mass 45 lbm
T/W at liftoff 4.4
Burn time 10 s
Max altitude 16k feet
Length ~14 feet
Diameter 6 inches
Plumbing Layout
HeliumTank
M
R LOXTank
S
M
R S
FuelTank
M
M
LOX Vent LOX Fill
Fuel VentFuel Fill /
Drain
Helium Fill
IgniterHelium Valve
Main Fuel Valve
Main LOX Valve
Igniter Fuel Valve
Igniter GOX Valve
Engine
Plumbing Photos
Plumbing Photos
Hardware Block Diagram
Power / ControlBoard
CPU Board
SignalConditioning /External ADC
Board
Helium Valve
ServoMux
Main Valve
LOX Vent Valve
Fuel Vent Valve
Helium Tank Pressure
LOX Tank Pressure
Fuel Tank Pressure
Igniter Pressure
Igniter Sense
Recovery Pressure
CPU ModuleNetburner MOD54415
PS Sensor
PT SensorIMU
ADIS16364
14.8VLi-Ion
BatteryCharge
+24VDC Igniter Solenoid
+5VDCCDI
LaunchDetect
>>
>>
>>
>>
ARM / SAFE
Recovery 1
Recovery 2
GPIO I2C
UART
SPI
UART
+5, +3.3VDC
+12, 5,3.3 VDC
GPSU-blox 7
UARTTMDigi XT-09
Debug >>UART
Ethernet >>Ethernet
Reset >>Reset
IRQ
IRQ
GPIO
Servo ActuatedValves
Transducers
GOX Solenoid
Fuel Solenoid
CDIRCEXL
CAMERA
Flight ComputerPower Supply
CPU / IMU / GPS / PT / PS / TM
Signal Conditioning
Flight Software Message Flow
Servo Mgr
Sequencer
servo_move
servo_status Sensor Read(50 Hz)
sensor_data
Navigator(10 Hz)
ADIS IMU(819.2 Hz)
imu_data
u-blox GPS(10 Hz)
gps_data
current_state
Discrete Mgrdiscrete_status
set_discrete
TM Handler(5-10 Hz)
SD Logger
*
state_vector
UDP HandlerOffboard /Ground Control
Ground Support Equipment
Control PC
UART
TM
Display PC
SwitchCopper / FC / Wireless
Switch
+5 / +24 /Batt Chg
Ethernet
Ethernet
BeagleBoneBlack
UART
Reset
Power
Ethernet
120 VAC
Ground Control Launch Pad
TM
Ethernet
TODO
● Finish flight computer, vehicle wiring
● Procedure development
● Proof tests of tanks, plumbing, valves
● Water tests
● LN2 tests
● Static test
● Recovery system design, testing
● Install skin, fins
● Launch!
Questions?
See pictures, sketches, videos at:
http://www.watzlavick.com/robert/rocket