AY Honors/Model Rocketry/Answer Key - Revision history

W126jep at 21:30, 1 January 2023

2023-01-01T21:30:35Z

W126jep at 20:59, 5 October 2021

2021-10-05T20:59:46Z

W126jep: Marked this version for translation

2021-04-30T14:39:48Z

Marked this version for translation

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W126jep at 14:39, 30 April 2021

2021-04-30T14:39:33Z

Jomegat bot: Bot: Automated import of articles * existing text overwritten *

2021-03-19T03:10:46Z

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2020-12-22T00:50:46Z

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Jomegat bot: Jomegat bot moved page Adventist Youth Honors Answer Book/Arts and Crafts/Model Rocketry to AY Honors/Model Rocketry/Answer Key: Bot: Moved page

2020-12-19T03:38:24Z

Jomegat bot moved page AY Honor Model Rocketry to AY Honor Model Rocketry Answer Key: Bot: Moved page

W126jep: Add {{SUBPAGENAME}} sortkey to category

2017-01-26T02:07:30Z

Add {{SUBPAGENAME}} sortkey to category

W126jep: + category Instructor Require

2016-12-20T16:54:44Z

+ category Instructor Require

W126jep: - Completed Honors category

2015-07-30T08:11:37Z

- Completed Honors category

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 ==References== <!--T:32-->
 * http://exploration.grc.nasa.gov/education/rocket/shortr.html
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-<!-- 1. Know and explain the Model Rocketry Safety Code.  -->
+<!-- 1. Know and explain the Model Rocketry Safety Code. -->
 # '''Materials.''' I will use only lightweight, non-metal parts for the nose, body, and fins of my rocket.
 # '''Motors.''' I will use only certified, commercially-made model rocket motors, and will not tamper with these motors or use them for any purposes except those recommended by the manufacturer.
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-<!-- 2. Know and explain the importance of the basic model rocket components.  -->
+<!-- 2. Know and explain the importance of the basic model rocket components. -->
 [[Image:Model_rocket_parts.gif]]
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 #'''Launch:''' Launch begins as soon as the motor ignites and ends when the rocket clears the launch rail.
-#'''Powered ascent:''' After the motor ignites, it generates thrust which causes the rocket to leave the launch pad and ascend into the air.  The engine will continue to provide thrust for as long as it burns, and it will continue to power the rocket into the sky.
+#'''Powered ascent:''' After the motor ignites, it generates thrust which causes the rocket to leave the launch pad and ascend into the air. The engine will continue to provide thrust for as long as it burns, and it will continue to power the rocket into the sky.
-#'''Coasting flight:''' The motor will burn for a fixed amount of time and then stop.  At this point, there is a delay and the rocket continues to glide upwards, riding the momentum gained during the thrust phase.  As the engine burns through the delay charge, it leaves a trail of smoke  as a visual aid to the rocketeer.
+#'''Coasting flight:''' The motor will burn for a fixed amount of time and then stop. At this point, there is a delay and the rocket continues to glide upwards, riding the momentum gained during the thrust phase. As the engine burns through the delay charge, it leaves a trail of smoke as a visual aid to the rocketeer.
 #'''Ejection Charge:''' At the end of the delay, the motor ignites an ejection charge which blows the nose cone off the rocket and deploys the recovery system.
 #'''Slow descent:''' The rocket returns to the ground using one of the recovery techniques listed below.
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 [[Image:Model rocket launcher schematic.png]]
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-In this launcher, power is supplied by a battery.  When the safety switch is closed and the igniter is connected to the terminals (usually a pair of alligator clips), electricity flows from the battery, through the LED and resistor (lighting the LED), through the igniter, through the switch, and back into the battery completing the circuit.  Because the current must flow through the LED and resistor, it is greatly reduced - not enough to sufficiently heat the igniter and  start the rocket engine.  The resistor in this circuit is 300 Ohms - high enough to keep the igniter from heating up, but low enough to light the LED.
+In this launcher, power is supplied by a battery. When the safety switch is closed and the igniter is connected to the terminals (usually a pair of alligator clips), electricity flows from the battery, through the LED and resistor (lighting the LED), through the igniter, through the switch, and back into the battery completing the circuit. Because the current must flow through the LED and resistor, it is greatly reduced - not enough to sufficiently heat the igniter and start the rocket engine. The resistor in this circuit is 300 Ohms - high enough to keep the igniter from heating up, but low enough to light the LED.
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-As soon as the launch switch is closed, the electricity will flow through the switch instead of through the LED and resistor.  Since the switch offers very low resistance to the current, the current is greatly increased.  This increased current heats the igniter to a high enough temperature to start the rocket engine.
+As soon as the launch switch is closed, the electricity will flow through the switch instead of through the LED and resistor. Since the switch offers very low resistance to the current, the current is greatly increased. This increased current heats the igniter to a high enough temperature to start the rocket engine.
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-Wadding is a fire-proof paper-like substance that is wadded up and place inside the body tube between the engine and the recovery system.  Its purpose is to prevent the hot gases released by the engine from damaging the recovery system and payload.  Wadding is sold as a package included with the engine.
+Wadding is a fire-proof paper-like substance that is wadded up and place inside the body tube between the engine and the recovery system. Its purpose is to prevent the hot gases released by the engine from damaging the recovery system and payload. Wadding is sold as a package included with the engine.
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-A boost glider is a model which is launched into the air via rocket power, and then all or part of it glides gently back to the earth using aerodynamic control surfaces.  During the powered ascent, the glider portion acts as a stable, ballistic body attached to the rocket.  It then transitions to a glider during the coasting flight phase.  This transition presents the most challenging aspect of a boost glider design.
+A boost glider is a model which is launched into the air via rocket power, and then all or part of it glides gently back to the earth using aerodynamic control surfaces. During the powered ascent, the glider portion acts as a stable, ballistic body attached to the rocket. It then transitions to a glider during the coasting flight phase. This transition presents the most challenging aspect of a boost glider design.
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-The payload of a rocket is held in the nose cone.  In model rocketry, there may or may not be a payload at all.
+The payload of a rocket is held in the nose cone. In model rocketry, there may or may not be a payload at all.
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-Velocity is a measurement of both speed and direction.  If either speed or direction changes, the velocity changes.
+Velocity is a measurement of both speed and direction. If either speed or direction changes, the velocity changes.
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-Ejection occurs at the end of the coasting phase of a model rocket's flight when the engine ignites the ejection charge.  This charge blows the nose cone off and deploys a parachute or a streamer.
+Ejection occurs at the end of the coasting phase of a model rocket's flight when the engine ignites the ejection charge. This charge blows the nose cone off and deploys a parachute or a streamer.
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-<!-- 5. Name and describe at least four different recovery systems.  -->
+<!-- 5. Name and describe at least four different recovery systems. -->
 ===Nose Blow recovery===
 A very simple recovery technique, used in very early models in the 1950s and occasionally in modern examples, is nose-blow recovery. This is where the ejection charge of the motor ejects the nose cone of the rocket (usually attached by a shock cord made of rubber, Kevlar string or another type of cord) from the body tube, destroying the rocket's aerodynamic profile, causing highly-increased drag, and reducing the rocket's airspeed to a safe rate for landing. Nose-blow recovery is generally only suitable for very light rockets.
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-<!-- 6. From a kit, build, finish, and paint a single-stage rocket that has a minimum length of six inches with a recovery system, such as a parachute or streamer. Successfully launch and recover the rocket with the recovery system deploying properly.  -->
+<!-- 6. From a kit, build, finish, and paint a single-stage rocket that has a minimum length of six inches with a recovery system, such as a parachute or streamer. Successfully launch and recover the rocket with the recovery system deploying properly. -->
 <!--T:30-->
-The National Association of Rocketry (NAR) has a wonderful guide for scouting and 4H organizations who wish to get into rocketry.  You can get it here:
+The National Association of Rocketry (NAR) has a wonderful guide for scouting and 4H organizations who wish to get into rocketry. You can get it here:
 http://www.nar.org/pdf/youthprogs.pdf

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 * http://exploration.grc.nasa.gov/education/rocket/shortr.html
 [[Category:Adventist Youth Honors Answer Book|{{SUBPAGENAME}}]]
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+[[Category:Instructor Required|{{SUBPAGENAME}}]]
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AY Honors/Model Rocketry/Answer Key - Revision history

W126jep at 21:30, 1 January 2023

W126jep at 20:59, 5 October 2021

W126jep: Marked this version for translation

W126jep at 14:39, 30 April 2021

Jomegat bot: Bot: Automated import of articles *** existing text overwritten ***

Jomegat bot: Bot: Automated import of articles *** existing text overwritten ***

Jomegat bot: Jomegat bot moved page Adventist Youth Honors Answer Book/Arts and Crafts/Model Rocketry to AY Honors/Model Rocketry/Answer Key: Bot: Moved page

W126jep: Add {{SUBPAGENAME}} sortkey to category

W126jep: + category Instructor Require

W126jep: - Completed Honors category

Jomegat bot: Bot: Automated import of articles * existing text overwritten *

Jomegat bot: Bot: Automated import of articles * existing text overwritten *