A Finnish beginners glider, with tail surfaces and wing tips in cardboard. The wing is only covered on the upper surface. The Swedish beginners model "Vargen", well known for anyone starting out model flying in Sweden during the 1940:s, is a direct derivate of the "Esa" .
| Name: Esa | Alternative name: |
| Plan-ID (S-O L. numbering): B-307 | Owner: SMOS |
| Designer: | Drawn by: |
| Year designed: 194? | Wingspan (mm): 650 |
| Category: Klass S1 | |
| Sources: | |
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Changed date: 2014-10-23
