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