Ju EF 100
Rob Arndt
Daryl Hunt
All work ceased in 1942 for unknown reasons. Easy reason, they
lied on it's performance.
Rob Arndt
No, shifting roles and varying proposals for new maritime recon and
bomber a/c.
Junkers EF-100:
Developed in 1940 for service on Deutsche Lufthansa’s transoceanic
routes, the EF-100 was to have been capable of transporting a 20,000kg
(44,080 lb) payload over a distance of 9,000km (5,590 miles) non-stop.
In fact, it never got that far. The RLM ordered its conversion for
service as a long-range maritime reconnaissance aircraft and bomber.
Of all-metal construction, the fuselage structure of the low-winged
EF-100 closely resembled that of Focke-Wulf’s Transozean (TO) Project;
two cross-sectional arcs combining to provide ample freight and
passenger space.
The militarized version could carry a 5,000kg (11,020 lb) bomb load
and a large amount of fuel.
At the same time the shape and structure of the fuselage was found to
provide a lift effect which enhanced flight characteristics. Despite
this, the Junkers design bureau abandoned further development work in
1941 upon orders of the RLM which had since come to regard the flying
boat as providing greater possibilities for the way ahead.
In 1942 the RLM planned to order resumption of design work on the
EF-100 as the Atlantic U-boats were then crying out for a long-range
maritime reconnaissance aircraft. But for some inexplicable reason
this decision was again overturned and all work on the EF-100 project
was finally cancelled at the end of 1942.
Data:
Powerplant: 6x 2500 hp Junkers Jumo 223 diesels
Dimensions:
Span: 213’ 3”
Length: 163’ 4”
Height: 29’ 6”
Wing area: 3,767 ft squared
Performance:
Range with military load: 5,590 miles
~ “Luftwaffe Secret Projects: Bombers 1935-1945”, pgs.32-33
Rob
Eunometic
Some images of the Jumo 223 engine.
http://www.motorlexikon.de/?I=8635
http://www.luft46.com/bv/bvp144.html
http://www.flugzeug-lorenz.de/index.php?id=113
This was a very fuel efficient 2 stroke turbo-diesel sfc at max cruise
0.36lbs/bhp. Lots of jet thrust.
Daryl Hunt
Can we agree that if the engine was available it "Might" have
been possible? But it wasn't. The Jumo 223 never was produced.
The Stats are not proven. That alone should make all other
stats on the AC suspect.
Daryl Hunt
> On Feb 16, 9:41 pm, Rob Arndt<teuton...@aol.com> wrote:
>> On Feb 15, 8:00 am, Daryl Hunt<dh...@nspami70west.com> wrote:
>>
>>> On 2/15/2011 6:24 AM, Rob Arndt wrote:
>>
>>>> http://www.hsgalleries.com/gallery04/images/JuEF100.jpg
>>>> http://www.luft46.com/junkers/juef100.html
>>
>>>> Rob
>>
>>> All work ceased in 1942 for unknown reasons. Easy reason, they
>>> lied on it's performance.
>>
>> No, shifting roles and varying proposals for new maritime recon and
>> bomber a/c.
>>
>> Junkers EF-100:
>>
>> routes, the EF-100 was to have been capable of transporting a 20,000kg
>> (44,080 lb) payload over a distance of 9,000km (5,590 miles) non-stop.
>>
>> In fact, it never got that far. The RLM ordered its conversion for
>> service as a long-range maritime reconnaissance aircraft and bomber.
>> Of all-metal construction, the fuselage structure of the low-winged
>> two cross-sectional arcs combining to provide ample freight and
>> passenger space.
>>
>> The militarized version could carry a 5,000kg (11,020 lb) bomb load
>> and a large amount of fuel.
>>
>> At the same time the shape and structure of the fuselage was found to
>> provide a lift effect which enhanced flight characteristics. Despite
>> this, the Junkers design bureau abandoned further development work in
>> 1941 upon orders of the RLM which had since come to regard the flying
>> boat as providing greater possibilities for the way ahead.
>>
>> In 1942 the RLM planned to order resumption of design work on the
>> EF-100 as the Atlantic U-boats were then crying out for a long-range
>> maritime reconnaissance aircraft. But for some inexplicable reason
>> this decision was again overturned and all work on the EF-100 project
>> was finally cancelled at the end of 1942.
>>
>> Data:
>>
>> Powerplant: 6x 2500 hp Junkers Jumo 223 diesels
>> Dimensions:
>> Length: 163� 4�
>> Height: 29� 6�
>> Wing area: 3,767 ft squared
>> Performance:
>> Range with military load: 5,590 miles
>>
>>
>> Rob
>
> Some images of the Jumo 223 engine.
> http://www.motorlexikon.de/?I=8635
> http://www.luft46.com/bv/bvp144.html
> http://www.flugzeug-lorenz.de/index.php?id=113
>
> This was a very fuel efficient 2 stroke turbo-diesel sfc at max cruise
> 0.36lbs/bhp. Lots of jet thrust.
Only One example was known to be built. Just one. It's only
claim to fame was that it started out life as the 204 and
contributed heavily to the Napier Deltic which went on to become
a Naval and Locomotive Engine. You forgot to include the weight
of the 223. It was heavy, real heavy and the larger Gas rigs
were lighter and were more usable for Aircraft.
Eunometic
>
Baloney,
Aerodynamics and airframe structure was by then a well undertood field
well supported by large scale wind tunnel moddeling. So long as the
engines provided the appoximate power, weight and sfc the aircraft, if
built, would be close to meeting its design goals. Diesel engine
design was also well established, the Jumo 204/205 series actually
already beat the sfc desired of the Jumo 223.
Daryl Hunt
867 hp. Now, for the weight involved, that's not much HP. The
204/205 were fine Ship Engines and Locomotive Engines but they
were too heavy for the power output for an AC. And the 204 is
pre WWII as well.
Early use of the Jumo powered Ju 86 bomber over Spain showed that
it was inferior to the He 111, with the diesel engines being
unsuitable for rough treatment during combat,[7] and production
plans were cut back. One Ju 86 had already been converted to use
radial engines as a testbed for possible export versions, and
this showed much improved reliability, and production was
switched to a version powered by the BMW 132 engine, the Ju 86E,
production continuing until 1938