Ju-186 and 286

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http://it.wikipedia.org/wiki/Junkers_Ju_86

http://en.wikipedia.org/wiki/Junkers_Ju_86

Ju-186 and Ju-286 was proposed with awesome engines of version R-3 ( Jumo 208) : Ju-186 with four and Ju-286 with six engines , well
anyone know if there are some images of these projects ? ::)
 
Thanks Borovik! I've read descriptions of this project but the drawings are quite different from what I had imagined :D
 
borovik said:
Only until the picture "windkanalmodells" from Waffen-Arsenal S-b.73.
(1942. Engine 4 x Ju 207 E / F)
Click to expand...
Then Jumo 208 was a variant of Jumo 207 ??? ???

So thanks for image !

My dream is see Ju-186 and Ju-286 designed like design concept like in books of Putnam ! ;D
 
borovik said:
Only until the picture "windkanalmodells" from Waffen-Arsenal S-b.73.
(1942. Engine 4 x Ju 207 E / F)
Click to expand...


From the same source,


here is the all data.
 

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In Novarra "Die deutsche Luftrüstung 1933 - 1945" the Ju 186 is mentioned as a planned test aircraft
for high altitude equipment only, not as a service aircraft. I know, that Novarra sin't still regarded as
a very reliable source, but as this project was started quite late and then still intended to use a fixed
landing gear, this interpretation doesn't seem to be totally unplausible to me.
 
My dear Jemiba,


if you have a time,please can you make a 3-view to Ju-186,and if possible a sketch drawing
to Ju-286 with six engines.
 
Hi Hesham and anybody else interested. I don't have the skills of Jemiba, but from the plans above, I have tried to clean it up and provide the missing bits. Hope this gives just a flavour of the Ju 186.
Ju 186 GA.jpg
 
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Very neat and amazing work dear Victor,of course I am interesting.
 
Jemiba said:
In Novarra "Die deutsche Luftrüstung 1933 - 1945" the Ju 186 is mentioned as a planned test aircraft
for high altitude equipment only, not as a service aircraft.
Click to expand...
This is also as written in Putnam's Junkers Aircraft and Engines 1913 - 1945 by Anthony Kay, which includes a paragraph on each, containing only what we know already, but no illustration. Although powerplant of the Ju 186 was four Jumo 208s, derived from the 207 as mentioned in the book's text, or two Jumo 218s, while the Ju 286 bomber was to have six Jumo 208s.
 
While the Jumo 207 and the Jumo 208 were similar in arrangement, all the texts I have seen indicate the Jumo 208 had significantly larger cylinder (130 mm bore x 160 mm x2 stroke) than the Jumo 207D engine (110mm bore x 160mm x2 stroke). Enough bigger that the 208 series was a new engine, not just a overbored Jumo 207.
 
Piper106 said:
Enough bigger that the 208 series was a new engine, not just a overbored Jumo 207.
Click to expand...

As I mentioned, that's what the book says. It doesn't say it was the same engine bored out.

"This was a larger version of the 207 and embodied the continued development of the 206. Only 12 examples were built for development between 1939 and 1942, and no production was undertaken."

Figures provided for Jumo 208B are as follows:

"Two-stroke, opposed piston, supercharged, six cylinder vertical in-line heavy oil engine. Bore 130mm, stroke 2 x 160mm, swept volume 25.5 litres, length 1.06m, height 1.436m, width 0.886m, weight n/.a, take off power 1,475hp, cruise power 985hp, speed 2,800rpm."
 
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Jemiba said:
In Novarra "Die deutsche Luftrüstung 1933 - 1945" the Ju 186 is mentioned as a planned test aircraft
for high altitude equipment only, not as a service aircraft. I know, that Novarra sin't still regarded as
a very reliable source, but as this project was started quite late and then still intended to use a fixed
landing gear, this interpretation doesn't seem to be totally unplausible to me.
Click to expand...

It turns out that the Ju 186 was ordered into production by Milch on July 17, 1942. It was essentially a Ju 86 R with wing/engine/fixed gear inserts and a fuselage insert. The new bits were to be made in Paris.

On October 9, 1942, Rowehl reported on the appearance of Spitfires with two-stage supercharger Merlins and an anticipated 14.5km ceiling. This prompted the withdrawal of the Ju 86 R from the West and a request to cancel the Ju 186 less than three months after it had been ordered.

Hertel tried to save the Ju 186 on November 6, 1942, saying that the Ju 186 A with 4 x Jumo 207 E would reach 14.5km at 400km/h in 1943 and the Ju 186 B with 4 x Jumo 207 F would reach 15.5km in 1944. But no one really liked the fact that it only had two crew, whereas other designs, such as the Hs 130 E, had three. So it was cancelled, with the French (SNCASO), who had reportedly already done a lot of work on it, presumably binning everything they'd done up to that point - hence why very little on the Ju 186 has survived.
 
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