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STUDENT LAUNCH INITIATIVE2010 – 2011

AIAA OC SECTION

CDR PRESENTATION

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Student Launch Initiative

AIAA OC Section

Agenda Introduction of team members (representing 5 high schools in

Orange County California) Finalized Vehicle – Black Brant

• Motor• Parachute and Descent Rates• Dual Deployment

Dual Deployment Tests

• Payload Test Plans and Procedures Scale Model – 2.6 inch Black Brant

• Second Flight• Flight Analysis

Testing• Black Powder• Battery Life • GPS Range

Educational Engagement Questions 2

Student Launch Initiative

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Finalized Vehicle – Black Brant

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Full scale model

Diameter 4 inches

Length 84.5 inches

Liftoff Weight 17.75 pounds

Descent Weight 13.85 pounds

Center of Pressure 62.0220 inches

Center of Gravity 52.4814 inches

Launch Rail Length 6 feet

Motor Retention Method Aero pack Qwik Change Motor Retainer

Thrust-to-Weight Ratio 8.28:1

Finalized Vehicle – Black Brant

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Full scale model

Rail Size One Inch

Size of shock cord 5/8 inch

Length of shock cord 15 feet in each section

Material of shock cord Tubular Nylon

Drogue parachute 24 inches

Main parachute 84 inches

Black powder for drogue 1.54 grams

Black powder for main 1.43 grams

Cesaroni K635 Redline

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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

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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

Parachute and Descent Rates

Rocket mass = 221.65 oz Drogue chute diameter = 24 in. Main chute diameter = 84 in. Calculated projected velocity for each chute with

online calculator and by hand v2 = 2FD / (ρ)(CD)(A)

• CD = 1.00

• FD = mg = (6.285 kg)(9.8 m/s2) Hand: vdrogue = 60.99 ft/s Online: vdrogue = 68.57 ft/s Hand: vmain = 17.43 ft/s Online: vmain = 19.59 ft/s

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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)

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Dual Deployment Tests

Christmas Tree Light:

Vacuum Chamber:

First Launch

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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 Yes

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

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Test Plans and Procedures

February 12 launch Scale model Test dual Deployment

Ejection charges Full Scale modelTest with modified ejection charge amount

Launch Scale Model March 5 and/ or March 12

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Scale Model – Black Brant

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Full scale model

Diameter 2.6 inches

Length 61.84 inches

Motor Ceseroni H152

Liftoff Weight 5.1 pounds

Descent Weight 4.56 pounds

Center of Pressure 51.18 inches

Center of Gravity 34.45 inches

Launch Rail Size 1 inch

Motor Retention Method Aero pack Qwik Change Motor Retention

Thrust-to-Weight Ratio 6.7:1

Scale Model – Black Brant

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Student Launch Initiative

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Full scale model

Rail Size One inch

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

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

Drogue parachute 15 inch

Main parachute 30 inch

Black powder for drogue 1.01

Black powder for main 1.14

Scale Model Second Flight

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Flight Analysis

After watching the flight we knew there was some faults:

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Fault Why it was made How we are going to fix it

Complex wiring The team was trying to fit everything in the avionics bay, and didn’t have much room

Make Longer wires to be able to assemble sleds outside of the avionics bay and slide in

Instability when reaching apogee

Team rushed to get one more flight in

Ultalize time more wisely, and not look over look any ‘small’ detail

Drag/impulse Separation A mentor advised not to use shear pins for main ‘chute

Follow the design and don’t let others misguide you

Testing

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

Testing that has been done includes:• Black Powder• Battery Life• GPS Range• Scale Model Launch

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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

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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

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

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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 transceiver (big red bee beeline) and saw how far it would transmit while being in the rocket.

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Transceiver Location

Range Successful

On the ground 3.05 miles Yes

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

In the process of contacting corporations regarding fundraising

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Questions

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