| SpaceCAD Lesson 9. Sectional Views: Gemini Spacecraft Landing System STEP 3. Section B |
| Now we'll
work on the circle labeled Section B. Start by
setting the Snap to Center, then
starting at the center of Section B, make a circle that
has a radius of 0.95. Then make another
circle inside this one that has a radius of
0.45.
Use the Line command to draw a line with Dist =0.5 and Ang =45, as shown below. Then make a copy of it so that you have two parallel lines as shown below.
Next use the Array (Polar) command on the two lines you just made. When it asks how many copies, type in "4". For degrees, type in "90". Make sure that ">360" is NOT checked. When it asks you for the Center of Rotation, click on the center of the circles. It should look like this:
Now set the Line width to the widest auto width line. Starting at D1, draw 3 lines connected to each other. The first should be Dist =.0884 Ang =225, the second Dist=.065, Ang =315, and the last should be Dist =.0884, Ang = 45. Now select these three lines you just drew, and use Array (Polar). When it asks how many copies, keep it at "4", and degrees should still be "90". When it asks you for the Center of Rotation, click on the center of the circles. It should look like this:
Finally draw two lines. Start the first one at D2, making it Dist =.125, Ang = 0. The second should be Dist =.0625, Ang = 90. Finally, use the Array (Polar) command on these two lines, set up the same as before, so that it looks like this:
Click the NEXT button to go to the next step. |
