Q1 Plans Chapter 7 Page 7-6
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- Category: Quickie Plans
- Published: Thursday, 16 October 2008 01:00
- Written by Dan Yager
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Contouring - In order to reduce weight and increase the interior room, the fuselage bottom is contoured on top side.
The drawing above shows the STA of each bulkhead that attaches to the bottom of the fuselage. These locations should be marked on the foam.
The dashed lines on that drawing enclose areas of foam that may be contoured Section A-A shows what a typical part of the bottom looks like after contouring. In essence, the homebuilder removes foam until the thickness is reduced to a minimum of 0.4” A toothpick with a mark at 04” is an effective way to check your progress.
Areas that are not contoured include:
- Within 2” of the edge of the fuselage bottom
- Within 1” of the bulkheads that you marked earlier,
Furthermore, all contouring must involve smooth transitions, i.e. no sharp corners or bumps are permitted. Section A-A details what the contouring should look like.
A wire brush, sandpaper, and scraps of green foam, are useful for contouring the bottom. Always wear a mask and vacuum often during the contouring.
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