Bucker Bu-131B Jungmann oz3890

 

Bucker Bu-131B Jungmann - plan thumbnail image

Bucker Bu-131B Jungmann - completed model photo

This plan was found online 10/01/2013 at: http://waynesfreeflightmodels.wordpress.com/mooney-plans/
Outerzone planID: oz3890 | Filesize: 1272KB | Format: • PDFbitmap | Credit*: waynesfreeflightmodels

   

About this Plan

Bucker Jungmann. Peanut scale biplane model of the German primary trainer, by Walt Mooney.

Quote: "Bucker Bu-131B Jungmann, by Walt Mooney.

What would you call a small model of a German biplane trainer? How about 'A Peanut Bucker Sandwich?' If you can get past that without becoming ill, read on and find out how Walt built this little beauty.

This is a Peanut Scale model of the Bucker BO 131 B J ungmann, the fa-mous German primary trainer for most of the German pilots that later flew the fighters and bombers in the Second World War. Profile Publication Number 222 has provided the data and the three-views necessary to design this mod-el which is a model of a Backer Bu 131 B numbered A-57, which was license-built by Dornier-Werke AG in Switzerland. It has the standard color scheme applied to all Swiss military BEI 131's after WW II. In fact, this color scheme was the single item that inspired the model. The base color is yellow, with white crosses on red bands on the top and bottom of the wings and on either side of the red rudder. It has a black fuselage stripe and black numbers on the fuselage.

The aerodynamic setup of the Jungmann is very good for a rubber powered model with its long nose and ample tail length. In addition, the two wings result in quite a bit of wing area within the 13 inch span limits of the Peanut rules.

The prototype model uses a Williams Brothers propeller and small nose plug. It uses hardwood wheels manufactured by Marlowe engineering, and a simple straight pin for the rear motor peg. It uses one thirty-second diameter piano wire for the landing gear, the propeller hook and the fore and aft cabane struts. The strut fairings, and the interplane struts are made of one sixty-fourth plywood (doubled for one thirty-second thickness in the case of the interplane struts). All the rest of the structure is balsa wood.

The fuselage is constructed in the traditional fashion, with two sides built over the plan, assembled into a box sith cross braces and formers, and then 1/32 sheet balsa cockpit combing, stringers, and cowl panels of thicker sheet..."

Supplementary files

Article pages, text and pics, thanks to JoeHayes.

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oz3890 datafile

Bucker Bu-131B Jungmann  
by Walt Mooney
March 1972 
13in span
Tags: Scale Rubber F/F Biplane Trainer
all formers complete :)
got article :)

 

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Notes

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Scaling

This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.

 

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