Re: Rutan Rips Off German Design


"Eunometic" <eunometic@xxxxxxxxxxxx> wrote in message
news:1129862302.668809.116010@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
> Keith W wrote:
>> "Bret Ludwig" <bretldwig@xxxxxxxxx> wrote in message
>> news:1129835875.651968.326150@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> >
>> > bbrought wrote:
>> >> Rob Arndt wrote:
>> >> > Spaceship One:
>> >> >
>> >> > http://www.creativeenergy.org/images/spaceship_one_2004.jpg
>> >> >
>> >> > Blohm und Voss Projekts:
>> >> >
>> >> > P.208: http://www.luft46.com/bv/bvp208.html
>> >> > P.209: http://www.luft46.com/bv/bvp20901.html
>> >> > P.210: http://www.luft46.com/bv/bvp210.html
>> >> >
>> >> > Gee, look familiar?
>> >>
>> >> Holy sh*t! I never knew the Germans built a manned aircraft that
>> >> exceeded 328,000 feet altitude. How naughty of Rutan to copy their
>> >> designs and claim the X-Prize for himself.
>> >
>> > Rutan still hasn't matched the X-15, over 40 years earlier.
>>
>> In terms of cost effectiveness he has FAR surpassed it.
>> The X-15 could only be launched from a B-52 bomber and
>> was a VERY expensive aircraft that only a major government
>> could afford.
>>
>> Rutan built a very much cheaper machine with its
>> own carrier at a cost that is a small percentage of
>> what the X-15 program required.
>
> The X-15 could sustain flight within the atmosphere. Rutans machine
> does not.

Gee what was that thing we saw come in to land then - chopped liver


> It is a ballistic vehicle with wings used for recovery. The
> blunt nose of Rutans aircraft would be an impediment to sustained
> 'level' flight that would be needed for such advanced engines as SCRAM
> jets that would 'fly' into orbit.

So your beef is that iy was well designed for the task it
was built to perform


> The blunt nose however eliminates
> peak heat on the nose of the vehicle and the expense of an enormous
> increase in hypersonic drag. This blund nost thus impedes flight into
> orbit but aids re-entry by reducing the heat shielding required.
>

Sounds like excellent design work doesnt it

>
>>
>> The entire development, construction and flight program
>> cost around $30 million
>>
>> The X-15 development cost was $105 million in 1950's dollars
>>
>> > And it was
>> > the Germans who pioneered the rocket technology that made both
>> > possible.
>> >
>>
>> No they didnt.
>>
>> Goddard was making liquid fuelled rockets before the first German
>> rocket was launched. Werner Von Braun said
>
> It was von Braun's and Dornbergers team that introduced regenerative
> cooling and the burner designes that made the liquid cooled rocket
> motors last more than 5 seconds without blowing up. These little
> issues were big problems for Goddard.
>

Which he solved by using refractory alloys which the germans
did not have. That film cooling technique had a hit on performance

> It was also the Germans that developed acceleromter (PIGA) based
> guidence systems that made accurate control of such large missiles
> possible and still forms the basis of the most accurate and advanced
> missile guidence.
>

Not exactly. The use of accelerometers in aircraft guidance systems
was widespread by 1940 and the implementation in the V-2 was
scarcely very successful. The missile was barely accurate enough
to hit a city the size of London. Od the 1200 rockets fired at the
city only 520 landed inside the Greater London Defence Zone

>
>
>>
>> "Until 1936 Goddard was ahead of us all."
>
> A gracious comment from von Braun. No one doubts Goddards work but it
> clearly didn't advance beyond a certain level.
>

That level did however include the X-15 engine which was built
by a company called Reaction Motors Inc. which was founded
in 1941 by 4 members of Goddard's team. The XLR-99 engine
was a linear descendant of engines developed during the war
including the XLR-11 designed in 1943 and which powered the X-1

Keith


.

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