# Geometric Design

Four nose surfaces are generated to model the radome as a thin layer approximation. To do that, click on Tools – Script – Load menu and load the nose_radome.nfp script that provides the internal layer of the radome. Not that the script is ready for loading it in millimetres because of its last command.

As it is not a canonical shape, we can approximate the next interfaces by scaling the
original one. Use three times the command *duplicate* to create three
additional copies of the generated shape.

The selected dimension as reference is the X-one, which has a distance to the origin
of 500 millimetre, given by the e parameter (it is the a parameter, in meters,
scaled to millimetres). As we need that the reference dimensions varies according to
the thickness and *t***parameters**, the scale factor is computed as the
desired size divided by the original one.

**scale**command to scale the three copies of the nose shape, each one by the corresponding factor:

Plane | Scale Factor |
---|---|

2 | (e+thickness)/e |

3 | (e+thickness+t)/e |

4 | (e+(2*thickness)+t)/e |

After creating the four noses, note that the base is centred at the origin of coordinates, so they must be moved to the horn.

**move**command to move the four noses from

*0 0 0*to

*0 0 -100*point.