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Lippisch P.13a

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actually its pretty old, from WW2 era but its interesting :D:D

The Lippisch P.13a was an experimental ramjet-powered delta wing interceptor aircraft designed in late 1944 by Dr. Alexander Lippischfor Nazi Germany. The aircraft never made it past the drawing board, but testing of wind-tunnel models in the DVL high-speed wind tunnel showed that the design had extraordinary stability into the Mach 2.6 range



The Lippisch Li P.13A was a project centered around supersonic flight through a unique airframe shape and ramjet-provided thrust. Lippisch set to work on a peculiar model that was unlike any of the war, an airframe whose general shape was akin to a diamond or triangle intended to incorporate the swept-back wing surfaces and low aspect ratio needed for supersonic travel at speeds beyond Mach 1.0.

The P.13A was the embodiment of his thinking, situating the single-seat cockpit at the center of the design and as part of the frontal face of a large dorsal rudder. The fuselage was flat from a side profile and triangular from the overhead perspective, essentially a tailless "flying wing" had the dorsal rudder been removed. Wings were swept-back at an angle of 60-degrees to provide the best balance of high-speed flight and stability at those speeds. The engine would be buried in the fuselage under the cockpit floor and the installation would run with ductwork from nose to tail.

The nose was a cylindrical intake port with the engine exhausting through a conventional nozzle at the base of the rudder. The fuselage would house the needed avionics and fuel stores. Developed from the outset as a technology demonstrator intending to prove the viability of several qualities (supersonic flight, excellent operational ranges through a streamlined design and low-cost operation), the P.13A surely looked to become one of the more important aviation products in history.

As conventional fuels were in extremely short supply by late 1944, Lippisch proposed that the P.13a be powered by coal. Initially, it was proposed that a wire-mesh basket holding coal be mounted behind a nose air intake, protruding slightly into the airflow and ignited by a gas burner. Following wind-tunnel testing of the ramjet and the coal basket, modifications were incorporated to provide more efficient combustion.

The coal was to take the form of small granules instead of irregular lumps, to produce a controlled and even burn, and the basket was altered to a mesh drum revolving on a vertical axis at 60 rpm. A jet of flame from tanks of bottled gas would fire into the basket once the P.13a had reached operating speed (above 320 km/h), whether by using a rocket to assist takeoff or by being towed.

The air passing through the ramjet would take the fumes from the burning coal towards the rear where they would mix under high pressure with clean air taken from a separate intake. The resulting mixture of gas would then be directed out through a rear nozzle to provide thrust. A burner and drum were built and tested successfully in Vienna by the design team before the end of the war.



https://en.wikipedia.org/wiki/Lippisch_P.13a

http://www.militaryfactory.com/aircraft/detail.asp?aircraft_id=1078
 

CAPSLOCKSTUCK

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interesting how they can leap so far
 

CAPSLOCKSTUCK

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Powered by coal. :pimp:
 
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clean coal

You do realize you just associated clean coal with NAZIS?

Godwin's law is not supposed to work like this...
 
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CAPSLOCKSTUCK

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clean coal

from what i read in the links it sounds like it was going to be granules of coal. I would hazard a guess as to suggest it was either coke or the gas which is produced when making coke, otherwise known as "towngas" which contains a variety of calorific gases including hydrogen, carbon monoxide and methane.
 
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