1

STUDENT LAUNCH INITIATIVE2010 – 2011

AIAA OC SECTION

CDR PRESENTATION

February 7, 2011

\

Student Launch Initiative

AIAA OC Section

Agenda Introduction of team members (representing 5 high schools in

Orange County California) Changes Since Original Posting Finalized Vehicle – Black Brant

• Parachutes, Motor, RockSim Simulations,

Parachute and Descent Rates, Dual Deployment, Payload, GPS

Test Plans and Procedures Scale Model – 2.6” Black Brant

• Flights, and Flight Analysis Testing

• Black Powder, Battery Life, GPS Range

Website Educational Engagement Questions

2

Student Launch Initiative

AIAA OC Section

Changes Since Original Posting Added slide 3 Modified slide 4 Modified slide 5 Split slide 5 Modified slide 6 Modified slide 8 Added slide 9 Modified slide 15 Modified Slide 16 Modified slide 17

Added slide 21 Modified slide 22 Modified slide 23 Modified slide 24 Added photos to

several slides

3

Student Launch Initiative

AIAA OC Section

Final Vehicle – Black Brant

4

Student Launch Initiative

AIAA OC Section

Parameter Material/Measure Parameter Material/Measure

Diameter 4 inches Length 87.5 inches

Body G-10 fiberglass Fins G-10 fiberglass

Liftoff Wt 17.9 pounds Descent wt 15.44 pounds

Cp 64.3 inches from tip Cg 55.48 inches from tip

Stability Margin

2.21 : 1 Motor Retention

Aeropack Qwik change motor retainer

Thrust/wt 8.28:1 Launch 1” rail 6 feet long

Drogue Parachute

5

Student Launch Initiative

AIAA OC Section

Drogue Parachute DetailsDrogue Parachute 24” TAC-1 (Giant Leap Rocketry) gives 65 ft/s descent

Drogue material 1.9oz low porosity ripstop nylon weight=8oz (estimate)

Drogue Construction 4 shrouds ½” nylon (1400 lb test) continuous across parachute

Swivel 1500 lb test

Shock Cord Tubular Nylon 5/8 inch, 15 feet long, 2250 lb test

Airframe space available 4” diameter x 10” long (approx 125 cu in) (8” usable)

Airframe space required (Lineal inches) parachute/shock cord

2 inches/1.5 inches

Black powder for drogue 1.02 grams

Pressurization details 16 psi - 200 lbs (3x#2 screws @ 35lbs each + friction)

Main Parachute

6

Student Launch Initiative

AIAA OC Section

Main Parachute DetailsMain Parachute 72” TAC-1 (Giant Leap Rocketry) gives 20 ft/s descent

Main material 1.1oz low porosity ripstop nylon weight=18oz

Main Construction 4 shrouds ½” nylon (1400 lb test) continuous across parachute

Swivel 1500 lb test

Shock Cord Tubular Nylon 5/8 inch, 15 feet long, 2250 lb test

Airframe space available 4” diameter x 17” long (approx 214 cu in)

Airframe space required (Lineal inches) parachute/shock cord

12 inches/1.5 inches

Black powder for Main 1.74 grams

Pressurization details 16 psi - 200 lbs (3x#2 screws @ 35lbs each + friction)

Cesaroni K635 Redline

7

Student Launch Initiative

AIAA OC Section

 

Pro54 1994K635-

17AMotor Data

Brandname Pro54 1994K635-17A Manufacturer Cesaroni

Technology

Man. Designation 1994K635-17A CAR

Designation

1994-K635-17A

Test Date 7/6/2003

Single-Use/Reload/Hybrid Reloadable Motor

Dimensions mm

54.00 x 488.00

mm (2.13 x 19.21

in)

Loaded Weight 1989.90 g (69.65 oz) Total Impulse 1749.50 Ns

(393.64 lb.s)

Propellant Weight 1281.00 g (44.84 oz) Maximum

Thrust

728.70 N (163.96

lb)

Burnout Weight 658.40 g (23.04 oz) Avg Thrust 656.00 N (147.60

lb)

Delays Tested 17 - 7 secs ISP 139.30 s

Samples per second 1000 Burntime 2.66 s

Notes Red Lightning™

Motor Selection

8

Student Launch Initiative

AIAA OC Section

Motor Properties

Manufacturer Cesaroni

Motor Type K635 Redline

Max, Average Thrust(Newtons)

656

Total Impulse (Newton – Seconds)

1749.5

Mass of Motor Before and After Burn(Pounds)

4.38/1.45

RockSim Simulation Results

9

Student Launch Initiative

AIAA OC Section

Property O MPH Wind 15 MPH Wind

Motor Cesaroni K635 Cesaroni K635

Velocity at end of 6ft rail 56 ft/sec at .251 seconds 56 ft/sec at .251 seconds

Maximum vertical acceleration

435 ft/sec2 434 ft/sec2

Maximum velocity 678 ft/s (V) 0.0 ft/s (H) 668 ft/s (V) 22 ft/s (H)

Maximum range from launch 0 feet 1077 feet

Maximum altitude 5213 ft 5095 feet

Drogue Deployment Time=17.6 seconds Time=17.4 seconds

Drogue Deployment (cont’d) Alt=5213 ft Velocity=0 ft/sec Alt=5095 ft Velocity=63 ft/s

Main Deployment Time=66 seconds Time=68 seconds

Main Deployment (cont’d) Alt=900 ft Velocity=88 ft/sec Alt=900 ft Velocity=85 ft/sec

Time to landing 99 seconds 109 seconds

Parachute and Descent Rates Rocket mass = 247.09 oz (Descent Mass) Drogue chute diameter = 24 in. Main chute diameter = 72 in. Calculated projected velocity for each chute with

online calculator and by hand (http://www.rocketreviews.com/tool_descent_rate.shtml)

FD = ½ (ρ)(Cd)(A)(v2)

• Cd = 1.00

• FD = mg = (7.00 kg)(9.8 m/s2)

• ρair = 1.22kg/m3

Hand: vdrogue = 65.43 ft/s Online: vdrogue = 63.51 ft/s Hand: vmain = 20.49 ft/s Online: vmain = 20.09 ft/s

10

Student Launch Initiative

AIAA OC Section

Dual Deployment Electronics: MAWD Perfect Flight, HCX G-

Wiz Partners The electronics will “back” one another up

incase one pyro (either drogue or main) does not fire.

Drogue Parachute will be deployed at apogee

Main Parachute will be deployed at 900ft The electronics have been tested four tests

have been done:• Christmas tree light test • Vacuum Chamber test• First flight in the scale rocket (MAWD Only)• Second Flight in scale model (MAWD Only)

11

Student Launch Initiative

AIAA OC Section

Dual Deployment Tests

Christmas Tree Light:

Vacuum Chamber:

First Launch

12

Student Launch Initiative

AIAA OC Section

Electronic SuccessfulMAWD Perfect Flight YesHCX G-Wiz Partners Yes

Electronic SuccessfulMAWD Perfect Flight yesMAWD Perfect Flight yesHCX G-Wiz Partners NoHCX G-Wiz Partners YesHCX G-Wiz Partners Yes

Flight Height Successful

First Flight 1938 Yes

Second Flight 1740 Partial

Payload G-Wiz Partners HCX flight

computer - measures acceleration of the rocket

Toshiba hard drive – test subject; we will run a Linux script on the hard drive over and over again; the time the hard drive takes to run the script each time is measured

Simple net computer/Linux computer – the mini computer that will execute the Linux script on the hard drive; it will be initialized by a PC; the flight data will be recorded on a flash drive inserted into this computer

Power converter – Keeps a steady flow of power to the payload components

13

Student Launch Initiative

AIAA OC Section

GPS TRACKING

14

Student Launch Initiative

AIAA OC Section

Transmitter in Vehicle

• Big Red Bee Beeline GPS• RF: 17mW on 433.920 MHz• Battery and life: 750mAh 10 Hrs• Size: 1.25” x 3” 2 ounces

Ground Station

• Receiver: Yaesu VX-6R• TNC: Byonics Tiny Track 4• GPS: Garmin eTrex Vista

Beeline receives GPS position• Encodes as AX.25 packet data• Sends as 1200 baud audio on 433.92 MHz

VX-6R receives at 433.92 MHz and extracts audio TinyTrack 4 converts audio to digital NMEA location data Garmin displays the digital location data on human screen

Test Plans and Procedures

February 12 launch Scale model(Note: 1st launch was January 1)

Test dual Deployment (MAWD and HCX) Ejection charges Full Scale model

Test with modified ejection charge amount Launch Full Scale Model

March 5 and/ or March 12

15

Student Launch Initiative

AIAA OC Section

Scale Model – Black Brant

16

Student Launch Initiative

AIAA OC Section

Parameter Material/Measure Parameter Material/Measure

Diameter 2.6 inches Length 62.35 inches

Body G-10 fiberglass Fins G-10 fiberglass

Liftoff Wt 5.1 pounds Descent wt 4.56 pounds

Cp 51.2 inches from tip Cg 43.99 inches from tip

Stability Margin

3.19 : 1 Motor Retention

Aeropack Qwik change motor retainer

Thrust/wt 6.7:1 Launch 1” rail 6 feet long

Scale Model – Black Brant

17

Student Launch Initiative

AIAA OC Section

Scale model

Engine Cesaroni H152

Size of shock cord 5/8” (sustainer) ½” (top section) flat nylon

Length of shock cord 15 feet (sustainer) 10 feet (top section)

Drogue parachute 15 inch rip stop nylon

Main parachute 30 inch rip stop nylon

Black powder for drogue 1.01 grams

Black powder for main 1.14 grams

Scale Model Test Flights

18

Student Launch Initiative

AIAA OC Section

Click here for video on aiaaocrocketry.org

Fault Most probable cause How we are going to fix it

Instability when reaching apogee Team rushed to get in one more flight and did not notice fillets on fins over the tailcone had cracked (West Systems Epoxy was used everywhere except fillets which were hobby shop epoxy)

Ultilize time more wisely, and not look over look any ‘small’ detail – use fiberglass tape on fins especially over gel coat on tailcone and never use hobby shop epoxy anywhere – even just fillets

Drag/impulse Separation Did not use shear pins on main per advice of an on-site “mentor” at the launch (“rocket is so small you don’t need them”)

Follow the design and don’t let others misguide you

Scale Flight Analysis

19

Student Launch Initiative

AIAA OC Section

• First flight to 1938 ft was very acceptable and proved design was stable• Second flight to 1749 ft began well, but:

• Showed a problem with wobble as it approached apogee• Deployed both drogue and main together

Testing

All the testing we have done is to help insure that our rocket is safe

20

Student Launch Initiative

AIAA OC Section

Testing that has been done includes:Black PowderBattery LifeGPS RangeScale Model Launch

Testing – Black Powder

The table below shows the testing our team has done with black powder charges. How we did the testing was by assembling the rocket as we normally would but through the pressure hole we put a wire to a battery to fire charges

21

Student Launch Initiative

AIAA OC Section

Located Amount Successful

Scale – Main 1.01 yes

Scale – Drogue 1.14 grams yes

Full – Main Rocket not completed  

Full – Drogue Rocket not completed  

Testing – Battery Life

22

Student Launch Initiative

AIAA OC Section

Electronics Life time (hours) Successful

HCX G-Wiz Partners  2.5 Yes

MAWD Perfect Flight  36 (and still going) Yes

Big Red Bee Beeline GPS

 18.7 (and still going) Yes

Payload  3.74 (and still going) Yes

Each device tested began with a new or just charged battery and ran under conditions close to sitting on the pad. Results were measured using a DATAQ Instruments DI-194RS four channel analog to digital converter

Testing – GPS Range

Our team first let the electronics connect to satellites, once it had done that then we started to walk away from the transmitter (Big Red Bee Beeline) and saw how far it would transmit while being in the rocket.

23

Student Launch Initiative

AIAA OC Section

Transceiver Location

Range Successful

On the ground 3.05 miles Yes

Website aiaaocrocketry.org Contains a separate tab:

SLI 2010-2011• Documents• Calenders• MSDS• SLI Photos/Videos • Manuals

Allows for the team members to stay updated

24

Student Launch Initiative

AIAA OC Section

Educational Outreach Cloverdale 4-H club Girl Scouts workshop Presentations to Sunny Hills High

School Science classes to get involved Help out ABC Unified School District

with their annual Science Olympics Articles published/ will be published

in the Orange County Register,The Foothill Sentry, and the Sunny Hills High School Accolade

We have contacted the Discovery Center to participate in their Youth Booth

We are going to have a booth at Youth Expo (4/8 – 4/10) and teach kids how to build rockets while informing them on SLI and other cool aerospace careers – approximately 2,600 students will be dropping by

In the process of contacting corporations regarding fundraising

25

Student Launch Initiative

AIAA OC Section

Thank you for letting us be part of SLI

Questions&

Comments?

26

Student Launch Initiative

AIAA OC Section