BV 141B (oz14439)


BV 141B (oz14439) by Martin Hepperle 1978 - plan thumbnail

About this Plan

BV 141B. Radio control scale model. Wingspan 1780 mm, for 10 cc engines.

Quote (google-translated from the German): "As early as World War I, attempts had been made to improve firepower and visibility by building asymmetric aircraft. In 1918 the Gotha G VI was born as the world's first asymmetric aircraft.

In 1937 the Reichs-Luftfahrt-Ministry (RLM) announced a competition for a single-engine observation aircraft with the best visibility, and the designer Dr. R. Vogt took part on a private initiative. He designed an aircraft in which the tail boom and engine were moved to the left from the longitudinal axis and the cockpit for the three-person crew was moved to the right. This arrangement compensated for thrust and twist, so that a largely neutral flight behavior resulted (the twist forces us to install the engine side pull).

The 'BV 141 V-1' flew just a year after Vogt received the order for a test model. The tailplane was still symmetrical and the flight characteristics so satisfactory that seven more test models were built without it. A BMW engine with 1,000 hp served as the drive.

The models of the B series, which with their larger dimensions were also intended for series production, received a 1,600 hp BMW engine. In addition, the tailplane was also designed asymmetrically to improve flight stability. However, after the construction of three machines, production was stopped because there was no need for the machine at the front. A total of only twelve 'BV 141' aircraft were built. For the model replica, I chose the B-0 aircraft because it looks more attractive due to the asymmetrical tailplane construction.

The gondola: The gondola on the right half of the wing is formed by a plane-glazed full-view canopy, which ends in a spherically curved tip at the rear. It can practically only be made of fiberglass, since a wooden construction would be very complex and heavy because of the round shape.

The material I used was a 165 gram layer of glass fabric that was saturated with epoxy resin. I made the original model with styrofoam and a moltofill cover, only the canopy was built from balsa boards (1.5 mm). I then made the actual pulpit from a plaster mold.

If you have the time and desire, you can replace parts of the pulpit with crystal-clear material. Otherwise, the window openings are painted on or - cut out of self-adhesive foil - glued on and then painted over. The finished nacelle is simply pushed onto the wing and glued or screwed in place. For this purpose, the lateral profile moldings are necessary.

Wings: The wing can be manufactured in Styrofoam as well as in rib construction. An attached trailing edge is not necessary in either case.

Notes on the styrofoam construction method: Several supporting ribs (34 and 34a) are required to transfer the forces to the planking (in this case preferably made of veneer). The styrofoam panels used should be at least 50 mm thick. For the rectangular middle parts of the wing, cut a profile piece approx. 950 mm long, from which you then cut off the required shorter pieces. After the end pieces have been cut to a trapezoidal shape, you can insert the support ribs. The landing gear strips and the wing mounts follow.

Now both the trapezoidal surfaces and the inner parts are planked on the underside after the leading edge (36) has been inserted. Now the 120 mm long pieces are cut off from the inner parts at the crease and with the outer parts..."

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BV 141B (oz14439) by Martin Hepperle 1978 - model pic

  • (oz14439)
    BV 141B
    by Martin Hepperle
    from FMT
    70in span
    Scale IC R/C Military
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 18/02/2023
    Filesize: 383KB
    Format: • PDFbitmap
    Credit*: NilsDeutsh
    Downloads: 759

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BV 141B (oz14439) by Martin Hepperle 1978 - pic 003.jpg
BV 141B (oz14439) by Martin Hepperle 1978 - pic 004.jpg

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