Douglas Mailplane (oz2232)


Douglas Mailplane (oz2232) by Walt Musciano 1951 - plan thumbnail

About this Plan

Douglas Mailplane. Walt Musciano's 30in span Douglas Mailplane free flight for .049-.099 glow engine. November 1951 Air Trails.

Quote: "Douglas Mailplane. Free flight flying scalers are comning into their own; here's on oldie and a goodie for Half-A fans, by Walter Musciano.

We were attracted to this 'old timer' by its excellent qualifications for free flight model performance with either rubber or Half-A engine. Both .049 and .099 engines are illustrated in beam and as well as bulkhead mountings. Instead of using a fuel shut-off mechanism, we put in a Maeco No 5 transparent flight tank which gives a run of 25 to 30 seconds for some real flying of this 234 square inch wing area model. We thank Messrs. Don Black and Chet Miller of Douglas Aircraft Co for their cooperation in supplying information on the prototype airplane.

Sand all balsa before it is cut and assembled. This pre-sanding removes nap and eliminates some weight that is neither structural nor an asset to appearance. The fuselage basic sides are cut from sheet balsa and followed by the formers. Cement the sides to each other at rear and attach former F in place, When dry, cement the remaining formers in place including the plywood bulkhead engine mount or beam mounts. Bend the fine music wire cabane struts and cement them rigidly to formers D.

Add the nose block, then the 1/32 sheet covering of fuselage top, Add the 1/18 square stringers to turtledeck. They are cemented directly to top of the formers and not set in notches. The turtledeck is covered with very fine tissue.

To install landing gear we must first construct the lower wing center panel. This was used as gasoline tanks on the full-scale plane which accounts for its thick section. Cut spars and ribs from sheet balsa and pin spars to the work table. Cement ribs to spars, followed by the leading edge. Bend the landing gear, solder all joints lightly. Bind the gear assembly to the spars, cement well. The center section is covered with pre-sanded 1/32 sheet and cemented to fuse-lage. Install fuel tank and pass engine fuel supply line through bulkhead (bulkhead mount only). Fuse-lage bottom aft of the wing is 1/32 sheet covered while that portion forward of the wing is carved from a very soft balsa block and hollowed. Sand entire fuselage lightly.

Pin the stabilizer structure to work table and cement all joints liberally. Remove and sand well. Recement joints and cover the structure with lightweight tissue using dope as adhesive..."

Supplementary file notes

Article pages, text and pics, thanks to BillW.


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Douglas Mailplane (oz2232) by Walt Musciano 1951 - model pic


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