Savoia Marchetti SM81 (oz929)

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Savoia Marchetti SM81 (oz929) by T Potesta 1970 - plan thumbnail

About this Plan

Savoia Marchetti SM81 Pipistrello. 1/20 scale WWII Italian bomber. From Aeromodeler June 1970. Free flight scale model for (single) 1.5cc power, adaptable for control line or radio control. Designed by Flight Lieutenant TC Potesta, RAF.

Quote: "WHAT'S THAT! A three engined free-flight scale model? Yes - we too were easily deceived when we saw Terry Potesta's S.M.81 fly past at the 1969 RAF champs - the answer was, of course, a single A.M.15 turning a 7x4 propeller, housed within the central nacelle! For complete realism and an unusual choice, this model should be hard to beat. It would seem an ideal model for conversion to single-channel R/C and the more adventurous control-line enthusiast could, by strengthening here and there, produce a two or even three-engined version.

The Savoia Marchetti S.M.81 was introduced to the Italian Air Force in 1934, and saw continual service until the end of World War II, in operational theatres ranging from Ethiopia to Russia, and in roles varying from bomber, transport and recon-naissance to air ambulance! The model depicted is of an example using Alfa Romeo engines, as used by the Italians on the Russian Front in 1943.

Construction. Although construction of this model is straight-forward, it should not be regarded as a beginner's project. After familiarising yourself with the plan, cut out all the fuselage parts. Laminate formers F3, 4 and 8 as indicated, then bend the undercarriage to shape, binding and cementing to the formers. Make sure that the holes for the bearers are spaced to suit your engine. Mark the former positions on the fuselage side, and add the 1/8 sheet doublers between F2 and 5. Next, lay one fuselage side flat on the bench, and add formers F2, F2A and F5 - checking with a set square that they are vertical. Add the opposite side and allow to dry thoroughly..."

Supplementary file notes

Article pgages, text and pics, thanks to algy2.

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Savoia Marchetti SM81 (oz929) by T Potesta 1970 - model pic

Datafile:

ScaleType:
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Notes

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Scaling

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