<p>When you choose to create a new design, you are presented with a blank
design and the <em>Rocket configuration</em> dialog is displayed.
<p>When you choose to create a new design, you are presented with a blank
design and the <em>Rocket configuration</em> dialog is displayed.
<p>Next, add a <em>Nose cone</em> to the design by clicking the
corresponding component addition button. This opens the nose cone
configuration dialog.
<p>Next, add a <em>Nose cone</em> to the design by clicking the
corresponding component addition button. This opens the nose cone
configuration dialog.
<p>The configuration dialog contains settings for the nose cone shape,
dimensions and material. Set the nose cone length to 10 cm,
<p>The configuration dialog contains settings for the nose cone shape,
dimensions and material. Set the nose cone length to 10 cm,
<p>Change the body tube length to 25 cm. The <em>Automatic</em>
option for the outer diameter is ticked by default, in which case the
diameter is automatically the same as that of the nose cone.
<p>Change the body tube length to 25 cm. The <em>Automatic</em>
option for the outer diameter is ticked by default, in which case the
diameter is automatically the same as that of the nose cone.
<p>Next, add a <em>Trapezoidal fin set</em> to the rocket. The body
tube must be selected in order to add the component.
<p>Next, add a <em>Trapezoidal fin set</em> to the rocket. The body
tube must be selected in order to add the component.
<p>The trapezoidal fin set has numerous dimension parameters. The
most important are the root and tip chord (length next to the body
<p>The trapezoidal fin set has numerous dimension parameters. The
most important are the root and tip chord (length next to the body
<p>Next, add an <em>Inner tube</em> as a motor mount. Select the body
tube, and then click the component addition button.
<p>Next, add an <em>Inner tube</em> as a motor mount. Select the body
tube, and then click the component addition button.
<p>The default dimensions are suitable for Estes A-C motors. To have
the motor mount overhang a bit, change the position parameter to
<em>Bottom of parent component</em> plus 0.5 cm.
<p>The default dimensions are suitable for Estes A-C motors. To have
the motor mount overhang a bit, change the position parameter to
<em>Bottom of parent component</em> plus 0.5 cm.
<p>To add <em>Centering rings</em> to keep the mount in place, select
the body tube and click the centering ring button.
<p>To add <em>Centering rings</em> to keep the mount in place, select
the body tube and click the centering ring button.
<p>The centering ring automatically selects the appropriate outer and
inner diameter when the <em>Automatic</em> checkboxes are selected.
<p>The centering ring automatically selects the appropriate outer and
inner diameter when the <em>Automatic</em> checkboxes are selected.
<p>The <em>canopy diameter</em> and <em>drag coefficient</em>
determine how much the parachute slows down the rocket during descent.
<p>The <em>canopy diameter</em> and <em>drag coefficient</em>
determine how much the parachute slows down the rocket during descent.
option will deploy the parachute when the ejection charge is fired, as
is typical in small model rockets.
option will deploy the parachute when the ejection charge is fired, as
is typical in small model rockets.
-<p>For completeness you can still attach a <em>Mass component</em> to
-the body tube for wadding, and an <em>Engine block</em> to the inner
-tube for holding the motor in place.
+<p>For completeness you can still attach a <em>Shock cord</em> and a
+<em>Mass component</em> to the body tube for wadding, and an
+<em>Engine block</em> to the inner tube for holding the motor in
+place.