steve gallacci wrote in message ...
robert arndt wrote:

http://www.wpafb.af.mil/museum/annex/an51.htm

... more "borrowed" German-tech courtesy of Dr. Alexander Lippisch.
From the Lippisch DM-1/P.13 we got the XF-92, F-102, F-106, and B-58.

Not directly, as the DM-1 was a rather flawed design.

It was a glider. The germans always built a glider first (usually a
wooden mockup) to verify their calculations in just about every
aircraft they built. The DM1 was crated and shipped to the USA and
tested in a windtunnel and by all accounts handelled very well. The
oversize verticle fin was removed and replaced by a bubble cannopy
with a smaller fin and this looks rather modern, to test that
configuration.

The Americans weren't so stupid as to reject a good idea because it
was "not invented here" although the Russians and Americans tried to
discredit each other for being dependant on German socientists for a
kick start in some areas. (Berier for instance asked that German
atomic reasearchers in particular publish under Russian pseudonyms)
and the US navy stopped development of heinkel He S11 jet engine
becuase of russian ribbing. This is quite a loss as the He S11 had
the diameter of an axial jet engine and the turbulent intake
tollerance of a radial compressor engine by virtue of its diagonal
compressor. The engines were thus slim enough to be burried in wings
and draw air in via very slim leading edge slits rather than round air
intakes.

The DM-1 was I believe a research aircraft and possibly pre
development aircraft for the Lippisch PM13a
http://www.luft46.com/lippisch/lip13a.html

The engine is interesting as was intended to be an inductor ramjet.
This had a rocket motor in the center of the ramjet that was fired at
zero speed both to provide thrust but mainly to induce an airflow so
that fuel could be burned in the main airflow till the ramjet became
self sustaining at about Mach 0.6

Because of the fuel shirtage the engine was supposed to be fired not
by keosene but by pulverised granulated coal fed from a basket. This
is not preposterous to anyone that has seen a jet of powdered coal or
seen how explosive coal dust could be. I suspect the rocket fuel
would have been heavy fuel oil obtained from the cokeing or pyrolisis
of coal and the oxidiser nitric acid both of which could be made with
minimum infrastructure and fire hypergolically.


The very basic
idea of a "delta" wing was his first, but it would not have been any
kind of stretch for others to do it, and the original work on the XF-92
(especially in its original form) owes very little to Lippisch.

Except all the inspiration, theory and supersonic wind tunnel testing
it was based on. What happens to the aerodynamic center of pressure
at Mach 1+ both above and below What happends to the momment?

When the USSR and USA start building ground effect aircraft that too
will be based on Alexanders Lippisch's work.

There was mass of german supersonic data. It went beyond just the
idea of a deltawing buit to well theorised and tested data.