A modern class S2/S-int glider from 1944-45, designed and built by Olle Bergendahl. After having been stored in its box for 40 years, the model was flown by Olle at the 1987 OT-champs. It flew so well that Sigurd Isacson named it "Optimal" (same meaning in Swedish as in English). The plan is based on measurements from the original model.
| Name: Optimal | Alternative name: |
| Plan-ID (S-O L. numbering): B-223 | Owner: SMOS |
| Designer: Olle Bergendahl | Drawn by: Kurt Sandberg |
| Year designed: 1944 | Wingspan (mm): 1380 |
| Category: Klass S2 | |
| Sources: Oldtimer 1/1991 | |
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Changed date: 2018-09-20
