Friday, November 29, 2013

Comet ISON (C/2012 S1 Comet Nevski–Novichonok) survives a pass near the Sun

The SNCASO SO.9000 Trident was a mixed power French prototype interceptor aircraft of the 1950s. Capable of supersonic flight the project was cancelled in July 1957 after only 12 examples had been built.

The French Air Staff tasked SNCASO to develop a point defence interceptor, studies began in October 1948. The aircraft that emerged was a shoulder wing monoplane, to be primarily powered by a SEPR rocket engine and augmented with wing-tip mounted turbojets. First flown on 2 March 1953 by test pilot Jacques Guignard the aircraft used the entire length of the runway to get airborne powered only by its turbojets.[1] From March 1955 the Trident I flew with new turbojets, the more powerful Dassault-built MD 30 Viper ASV.5, which produced 7.34 kN (1,654 lbf) thrust each. With these engines it soon exceeded Mach 1 in a shallow dive without rocket power.

Test flights of the SO.9000 were described by the author Bill Gunston as 'hairy' until the rocket motor was added in September 1954. During the 18-month test programme the aircraft completed over 100 flights, eventually reaching a speed of Mach 1.8 and an altitude of 20,000 metres (65,000 ft).

A Trident II was lost due to an accident on 21 May 1957 The project was cancelled in July 1957.

Wednesday, November 20, 2013

Microlight engine failure at 300ft and emergency landing

"Cockpit camera captures the terrifying moment a micro-light's engine cuts out in mid-air, forcing the pilot to make an emergency crash landing. Aviator John Merriman, 53, was making a solo flight in his two-seater microlight aircraft above the Somerset countryside this month, during a rare spell of good weather. Soaring at 300ft and at a steady speed of 50 knots, it was John's second flight of the day. But 11 minutes into the flight, the engine suddenly cut out, bringing the propeller to a juddering halt and filling the cockpit with an eerie silence."

Thursday, November 14, 2013

Inside bullets and a grenade

I recognize the first two, but what in the world is the third bullet with the three copper slugs?

Wednesday, November 13, 2013

Rocket golf?

"FORE!! Three - Two - One - Fire!" called Doug Frost, inventor of Rocketry Golf and Manager of the Rocketry Golf Organization. Then he launched his ball (on the nosecone of a model rocket) from the tee of the par-five 433-yard first hole at the Ridge Golf Club in Auburn, California. Not fazed by the uphill approach shot to the green, he placed his tee shot...err...launch... only 23 feet from the hole. Unfortunately, Doug isn't much of a regular golfer, and two-putted in for a birdie. Frost's rocketry golf replaces your golf clubs with a selection of rockets and a putter. The rockets are used to launch the ball onto the green, where the traditional putter comes back into play."

You may recognize Doug Frost, the holder of the F motor altitude record for something like 35 years.

Rocket Golf.

Saturday, November 9, 2013

What happens when neutron stars collide? Supercomputer Simulations

"Two neutron stars collide in one very big bang.

Imagine a dead star the size of a city and with more mass than our sun. Now imagine two of these ultra-heavy spheres smashing into each other, generating a blast bright enough to outshine an entire galaxy. Scientists have recreated just that using supercomputers to model what happens during the collision of two neutron stars. The entire process unfolds in just 35 thousandths of a second, but what this new analysis reveals is how the tangled magnetic field lines of the collapsed neutron stars restructure around a black hole, focusing a narrow stream of particles that jet into space at 99.995 percent the speed of light. Scientists believe events like this are one source of gamma-ray bursts, the powerful flashes of light from beyond the Milky Way that were first detected by satellites in the late 1960s. Watch the visualization below to see this lightning-fast cosmic wreck evolve in super-slow motion."

More at NASA.