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<!-- Update all URLs to https://aviationcalcs.com when domain is live -->
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  <!-- PPL & Pilot tools -->
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    <lastmod>2026-05-20</lastmod>
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    <lastmod>2026-05-20</lastmod>
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    <lastmod>2026-05-20</lastmod>
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    <lastmod>2026-05-20</lastmod>
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    <lastmod>2026-05-20</lastmod>
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    <loc>https://aviationcalcs.netlify.app/#wca</loc>
    <lastmod>2026-05-20</lastmod>
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  <url>
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    <lastmod>2026-05-20</lastmod>
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  <!-- Aerospace Engineering tools -->
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    <lastmod>2026-05-20</lastmod>
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  <url>
    <loc>https://aviationcalcs.netlify.app/#lift-drag</loc>
    <lastmod>2026-05-20</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
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    <lastmod>2026-05-20</lastmod>
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    <lastmod>2026-05-20</lastmod>
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    <lastmod>2026-05-20</lastmod>
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  <!-- Orbital Mechanics tools -->
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    <lastmod>2026-05-20</lastmod>
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    <lastmod>2026-05-20</lastmod>
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    <lastmod>2026-05-20</lastmod>
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    <loc>https://aviationcalcs.netlify.app/#tsiolkovsky</loc>
    <lastmod>2026-05-20</lastmod>
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