An' easily' assembled,' fun' toy' that' demonstrates' both'rocketry'and'aerodynamic'principles.'

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Samantha Lang
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1 1# Rocket'Glider' ' by#create#it#lab#(createitlab.org)# An' easily' assembled,' fun' toy' that' demonstrates' both'rocketry'and'aerodynamic'principles.' This'document'includes'a'list'of'materials'required,' assembly' instruc<ons,' and' a' discussion' of' the' principles'involved.'

2 Materials'&''Tools' 2# Scissors' Ruler' S<ff'paper'e.g.'file'folder'or' file'cards' Tape' 2'plas<c'straws'' One'must'fit'inside'the' other'and'slide' MacDonalds'uses'large' diameter'straws' Plas<c'boIle'with'a'spoutJ type'cap' Bic'pen'

3 3# 'Assembly'J'1' Rocket#Glider#Wing#Assembly# 1. Cut' s<ff' paper' into' three' strips' 1' inch' wide' and' 5' inches'long.' 2. Take' one' strip' and' curl' it' into'a'circle.'tape'the'ends' together' to' create' small' loop.' 3. Posi<on' remaining' two' strips'such'that'the'narrow' ends'overlap'each'other.' 4. Tape'them'together'producing'a'long'strip.' 5. Configure'in'circle'as'in'step'two'and'tape'free'ends' to'create'large'loop.'

4 Assembly'J'2' 4# Rocket#Glider#Final#Assembly# 1. Select'the'large'diameter'straw,'fold' over'one'end'about'¼'inch'and'tape'to' close'the'end.' 2. Place' a' one' inch' piece' of' tape' on' a' table' with' the' s<cky' side' up.' Posi<on' closed' end' of' the' straw' onto' the' center'of'the'tape'just'before'the'fold.' 3. Posi<on'the'small'loop'over'the'exposed'tape'and'gently' wrap'tape'up'onto'the'loop'to'secure'it'to'the'straw.' 4. Using'the'procedure'of'steps'2'and'3,'aIach'large'loop' approximately'1'inch'from'open'end'of'straw.'the'loops' must#be'lined'up'with'one'another.'

' Remove'cap'from'boIle'and'cut'off' protec<ve'flap,'if'present.

5 5# Assembly'J'3' Launcher#assembly# Remove'<p/ink'cartridge'from'pen.' Cut'outer'casing'3'inches'back'from' <p'of'pen.' Remove'insert'from'<p.' Remove'cap'from'boIle'and'cut'off' protec<ve'flap,'if'present.' Place' <p' insert' into' the' top' of' the' cap.' Secure' <p' in' place' by' reinser<ng' casing'from'the'inside'of'cap.' Tape' small' diameter' straw' onto' end'of'<p'insert.' Screw'cap'onto'boIle.'

6 Opera<on' 6# Preferred#mode#of#operaGon# 1. Insert'small'straw'of'launcher'into'large'straw'of'glider.' 2. Hold'assembly'horizontally'and'squeeze'boIle.' This'mode'enables'discussion'of'air'and'air'pressure,'ac<on/reac<on'and'flight' aerodynamics.' ' ' Alternate#mode#of#operaGon# Do'not'use'boIle'assembly,'just'insert'small'straw'into'glider'body'and'blow.' This'mode'enables'discussion'of'ac<on/reac<on'and'flight'aerodynamics.' Second#alternate#mode# Hand'launch'glider' This'enables'discussion'of'flight'aerodynamics.'

7 Rocket'Glider'Propulsion'1' 7# Pressure#from#squeezing#the#boLle#causes#air#to# escape# from# between# straws# creagng# a# force# toward#bolle.# Escaping# air# creates# an# equal# # and# opposite# force# on# the# glider# # called# thrust,#propelling#the#airfoil#forward.# Because'the'airfoils'are'flat,'liIle'liZ'is'created.' Any'liZ'generated'is'due'to'angle'of'aIack,'that'is,'any'angular' devia<on'of'the'airfoil'from'horizontal.''' The'system'is'dynamic'because'the'thrust'is'not'constant.'

'' For'large'sudden' 'increases'in'air'pressure,'the'volume'increase'must'also' be'large'and'sudden.

8 'Rocket'Glider'Propulsion'2' 8# Squeezing' the' boile' creates' an' increase' in' air' pressure' inside' the' launch' straw.' The' increased' pressure' is' reduced' by' pushing' the' rocket' forward' on' the' launch'straw;'thus'increasing'the'volume'of'the'system.'' For'large'sudden' 'increases'in'air'pressure,'the'volume'increase'must'also' be'large'and'sudden.' HIGH# Thus' the' rocket' is' rapidly' pushed' forward' on' the' launch' straw,' PRESSURE# gaining' momentum'un<l'pushed'off'the'launch'straw.' AZer'the'rocket'leaves'the'tube,'the'pressure'is'released'and'the'launching' thrust'becomes'zero'' '''HIGH' PRESSURE'

9 9# Rocket'Glider'Aerodynamics' Gravity# Drag# Thrust# Airfoil## VerGcal##### ##Drag# Airfoils' slow' the' fall'of'the'glider'by' increasing' surface' area' which' increases' the' ver<cal' drag' i.e.,' air''resistance.' ' Body# Drag#

10 ROCKET#GLIDER#AERODYNAMICS# MAKE#A#BETTER#ROCKET#GLIDER#!#######JUST#FOLLOW#THE# ' 10# What#causes#Lia#in#a#Rocket#Glider?# What#would#increase#the#lia?## What#would#decrease#horizontal#drag?# What#would#increase#verGcle#drag?''' STOP!# What#did#you#build?## J #What#worked?## J #What#problems## ###did#you#have?# c#what#did#you# ###learn?# What#do#you#want#to#try#next?#' COMMUNICATE# RESEARCH# MODEL# ###What#can#you#change#######to# increase#lia#or#to#decrease#drag## #####c#shape#of#the#airfoils?# #####c#size#of#the#airfoils?# #####c#scale#of#the#glider?# #####c#what#else?# How#far#did#the#glider#go?# How#high#did#the#glider#go?# Make#a#sketch#of#the#flight#path# TEST# MAKE# Make#a#sketch## List#the#materials#you#need# How#will#you#connect#the#parts?# List#the#tools#you#will#need##'

11 11# Rocket'Glider'Experiments' What'happens'if'the'width'of'the'airfoils'is'made'larger?' What'happens'if'the'diameter'of'the'airfoil'is'increased?' What'happens'if'the'<p'is'weighted'down,'i.e.'a'paper'clip' is'aiached?' What'happens'if'the'tail'is'weighted'down?' Does'the'launch'velocity'affect'the'fall'<me?' Compare'the'<me'in'the'air'of'a'glider'that'is'dropped'to' an'iden<cal'glider'that'is'launched.'

12 12# Rocket'Glider'Ques<ons' Observa<on:'the'glider'does'not'stay'aloZ.' Why?' Does'this'mean'that'the'system'is'stable'or'dynamic?' What'would'be'required'to'keep'the'glider'in'the'air?' What'would'happen'if'the'rocket'glider'were'released'in' outer'space?'

E Physics: A. Newton s Three Laws of Motion Activity: Rocketry Appendix A: Straw Rocket

E Physics: A. Newton s Three Laws of Motion Activity: Rocketry Appendix A: Straw Rocket Appendix A Note: Do not begin this appendix until you have reached step 7 of the parent lesson, Rocketry. Note: This lesson contains two launch options: Launch Option 1 uses a less formal analysis of launch