Bucker Jungmeister (oz14783)

 

Bucker Jungmeister (oz14783) by Gerald Curd 1980 - plan thumbnail

About this Plan

Bucker Jungmeister. Radio control scale model biplane. Wingspan 1098 mm, for 0.40 engine and 4 channels.

Quote: "A 43in wing span sports scale model for .35-.40 engines and 4-function RC. Bucker Jungmeister, by Gerald Curd.

Advanced aerobatic trainer aircraft are an essential part of any military airforce and the German authorities recognised this need when rebuilding of their armed forces started in the mid 1930s. Based on the two seat 'Jungmann' the Jungmeister was produced by the Bucker concern in 1935 and, some forty-five years later is still reckoned to be an excellent acrobatic aircraft. Because of the power limitations, it was fitted with a 140 or 160 hp engine, it is no longer competitive in top class international aerobatic contests. but it is hoped that the distinctive lines of this delightful biplane will be seen at airshows for many years to come.

Roy Legg, owner of the prototype featured here in the seventies, will be remembered for his spirited displays with the 'Jungmeister' his speciality being a one and a half flick roll from knife edge on the starboard wing to knife edge on the port wing - a manouevre to delight the informed spectator, and show the remarkable agility and controllability of this classic biplane.

Gerald Curd, designer of the model, explains how he succumbed to the charms of the 'Jungmeister' and his approach to the design, building and flying of this practical and very flyable replica.

My first encounter with a Bucker Jungmeister was at a Popular Flying Association meeting at Thruxton, where I had the opportunity to examine G-AXIH and chat with her pilot. Thus enthused, scale drawings were obtained and plans drawn up for a 1 /6th scale model of 43 in wingspan.

A sprung undercarriage is essential so that she sits correctly on the ground but retains the stalky appearance in the air. The top wing fixing is my own idea and has been fully proven on two other 'bipes' without any flying wires at all. It does away with rubber bands, and is easy and quick to rig, and fairly crash resistant.

Wing Construction: Building should be started with the top wing, as this is needed to check the strut alignment before the fuselage is completed. The wing outer panels are built flat on the plan, first pinning down the front lower and 1/8 x 3/8 in spars, followed by the ribs, then add TE, front top spar and finally the soft LE, and wing tips. The ply ribs have the strut holes drilled for the top wing, and the aileron pushrod holes for the lower. The underneath of the centre section TE of the top wings is shaped to maintain the same thickness as the outer panels, the top being left at the same aerofoil section.

The underneath of the lower centre section is 1/16 ply and hand launching cut-outs are made either side of the two middle ribs, these ribs can be adjusted in width to suit the servo used. The wings should be rigged with nylon kite string with a fair tension as a safety precaution and to retain the struts. The struts should be drilled at the lower end only at first, and checked in position, before drilling the top holes. As it is easier to cover the wings without the strut hooks in the way, cover the underside of the top wings and the top of the lower then install the hooks before covering the rest.

Fuselage: Build the fuselage sides flat on the plan from 3/16 square spruce, 3/16 balsa sheet and 1/8 x 3/16 balsa diagonals. When dry, lift from plan and glue the 1/32 ply doublers to the insides (these should have the centreline marked on) and then the 1/2 x 3/8 beech strut mounts, making sure these are accurately aligned.

Join sides with F1 and F4 making sure all is square and in line When dry pull in rear and add remaining formers and lower cross-pieces, then add 1/8 curved rear top and stringers. Now mount the centre section struts, checking alignment by fitting the top wing and measuring to the centreline on the ply doublers..."

Direct submission to Outerzone.

Quote: "Dear staff at Outerzone, My name is Jesus Cardin and I am a Spanish R/C modeller. I am an Outerzone user since many years ago, but have not contributed with any plan up to now.

Now I would much like to pass my first plan and make a little contribution to complete Mr. Gerald Curd's plan collection. As far a I know, Mr. Curd just produced 3 designs, all biplanes and all for UK magazine RCM&E: the Bucker Jungmeister (June 1980 issue), Bucker Jungmann (May 1981 issue) and Acro Sport (oz13588) (November 1983).

As you already offer the EAA Acro Sport in Outerzone, now I would much like to add the first design, this is the Bucker Jungmeister. I may personally may talk on the model as it was my first plan built model in 1981 and I confirm it is a very nice and easy model to fly. Mine was powered with an OS Engines .40 FSR ABC and it proved capable of all aerobatics figures I knew then. The model is quite straightforward and relatively easy to build and I consider a very fine addition to Outerzone, even already being available the Mr. Whitehead .20 version Bucker Jungmeister (oz6180) and Mr Platt 1/4 scale design Bucker Jungmeister (oz5841) as it is a mid size 1/6 scale and very well suited for electric power adaption.

I would only care possible builders to strictly follow the plan guide, mainly regarding to the struts rigging as it actually works and the sprung undercarriage, which in my own model proved to be quite rugged but it is essential to keep the materials and building techniques as per the plan (I changed the undercarriage brass central struts connector for a steel one and it was a continue source of problems all the model life!).

Enclosed you will find the plan and original building article in PDF format as well as 4 photos (scanned from slides) of my original Bucker Jungmeister from 42 years ago [main pic, 003-005]. Thanks a lot for you labour and effort. Jesus Cardin, Talamanca de Jarama, Madrid (Spain)"

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Bucker Jungmeister (oz14783) by Gerald Curd 1980 - model pic

Datafile:
  • (oz14783)
    Bucker Jungmeister
    by Gerald Curd
    from RCME
    June 1980 
    43in span
    Scale IC R/C Biplane
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 18/08/2023
    Filesize: 793KB
    Format: • PDFbitmap
    Credit*: JesusCardin
    Downloads: 671

ScaleType:
  • Bücker_Bü_133_Jungmeister | help
    see Wikipedia | search Outerzone
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    ScaleType: This (oz14783) is a scale plan. Where possible we link scale plans to Wikipedia, using a text string called ScaleType.

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Bucker Jungmeister (oz14783) by Gerald Curd 1980 - pic 003.jpg
003.jpg
Bucker Jungmeister (oz14783) by Gerald Curd 1980 - pic 004.jpg
004.jpg
Bucker Jungmeister (oz14783) by Gerald Curd 1980 - pic 005.jpg
005.jpg

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Notes

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Scaling

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