| Infos techniques | It is a high-wing monoplane of mixed construction. The fuselage is of welded steel tubes wilh pine bodywork and fabric covering. The wings and StTuts are wooden. Sheremetev chose steel-tube construction for the fusela.ge in order to prolong the life of the glider, but decided not to use metal for the wings because of the greater complication that would be caused.
Like several other Russian gliders the XXX Let has swept-forward wings to ensure correct equilibrium whether there is
only one person aboard or whelher there are two, but unlike most of these other types the sweep is compound, and indeed on the leading edge of the outer section it is practically cancelled by taper, though on the trailing edge the taper accentuates it. The ailerons occupy the whole trailing edge of the outer sections. The centre sections, though slightly swept forward, have no taper and are fitted with spoilers at about 25% chord near their junction with the outer sections. The fuselage is rather like the German Doppelraab in shape and carries a skid with rubber shock-absorption, behind which is a single wheel, the latter being just aft of the wing-bracing strut. The tail unit is very angular and the fin extends below the fusela,ge. The tailplane is mounted on top of the fuselage, and the elevator. which is in one piece, has a small cut-out for the fin leading edge.
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| Histoire résumée | Un concours de design de planeur biplace d'entraînement organisé en URSS en 1956, en vue de remplacer le célèbre Antonov A-2, qui après 20 ans de bons et loyaux services, ne répond plus maintenant aux standards actuels. Le concours était organisé par la DOSAAF qui avait envoyé des invitations à participer à de nombreux designers et organismes. Toutes les inscriptions ont été faites sous des pseudonymes afin que les noms des concepteurs ne soient révélés qu'après la publication des résultats. Le règlement stipulait que le projet devait conduire à une construction facile, pour une machine légère et robuste, mais ayant de bonnes qualités de vol.
Le projet "XXX Let" ("30 Ans"), de B. N. Sheremetev fut le vainqueur de ce concours. Il ne semble pas que ce planeur ait été construit.
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