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Download the Plane Maker Manual - X-Plane

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28 3. SHAPING THE BODY OF AN AIRCRAFT<br />

Figure 3.23: The four boxes for creating body-mounted speedbrakes<br />

If you are not copying ano<strong>the</strong>r object’s geometry, you must start by selecting <strong>the</strong> speedbrake’s<br />

type. The drop down box labeled 2 in Figure 3.24 selects a type of ei<strong>the</strong>r “none” or ”body mounted.”<br />

Any speedbrake box that you are not using should have a type of “none” set for it. Likewise, if you<br />

do intend to use a body-mounted speedbrake, set its type to ”body mounted.”<br />

After turning on any body-mounted speedbrakes you want to use, it makes sense to jump down<br />

to <strong>the</strong> geometry box, labeled 6 in Figure 3.24. Speedbrakes in X-<strong>Plane</strong> are 2-dimensional, composed<br />

of up to four points. Click away from any existing points to create a new one, and click a point and<br />

drag it to change <strong>the</strong> speedbrake’s geometry.<br />

Note that <strong>the</strong> maximum width of <strong>the</strong> speedbrake geometry box here is <strong>the</strong> same as <strong>the</strong> maximum<br />

gear door size parameter, located in <strong>the</strong> Gear Data tab of <strong>the</strong> Landing Gear menu. For information<br />

on setting this, see <strong>the</strong> section “Adding Body-Mounted Speedbrakes” below.<br />

After creating at least a rough model of <strong>the</strong> speedbrake’s shape, you can position it on <strong>the</strong><br />

aircraft and set its extended and retracted angles.<br />

To begin positioning a speedbrake, you can set its roll attitude. This is done using <strong>the</strong> axis<br />

of rotation parameter, located beneath <strong>the</strong> speedbrake type control and labeled 3 in Figure 3.24.<br />

A roll of 90 degrees makes <strong>the</strong> speedbrake point straight up, while a roll of 0 degrees makes it<br />

completely horizontal.<br />

Next are <strong>the</strong> standard location controls, labeled 4 in Figure 3.24. These are presented here in<br />

longitudinal-lateral-vertical order, from left to right. For information on using <strong>the</strong>se controls, see<br />

<strong>the</strong> section “How Positions Are Set in <strong>Plane</strong> <strong>Maker</strong>” at <strong>the</strong> beginning of this chapter.<br />

Beneath <strong>the</strong> location controls are <strong>the</strong> speedbrake’s open and closed angles, labeled 5 in Figure<br />

3.24. The parameter on <strong>the</strong> left is <strong>the</strong> angle of <strong>the</strong> speedbrake when it is retracted; <strong>the</strong> one<br />

on <strong>the</strong> right is its angle when extended. Positive values here will cause <strong>the</strong> speedbrake to hinge<br />

upward, while negative values cause it to hinge downward.<br />

The final settings in each speedbrake’s box (labeled 7 in Figure 3.24) are related to its paint<br />

textures. Information on working with <strong>the</strong> paint is found in Chapter 8, in <strong>the</strong> section “Creating a<br />

Basic Paint Job.”

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