Friday, October 18, 2013

HPR to become a news blog

Hi all, we have decided, after much debate and deliberation, to turn this into a news blog. We have not settled on the format yet, but this is a sample of what we hope it will be like.

Thursday, October 10, 2013

FSA Rocket Launch - 66% success rate

All politics aside, these rockets seem pretty good. Put a camera payload on there instead of explosives and you would have a nice show.

Wednesday, October 9, 2013

Tracking down radioactive remains and equipment near Chernobyl

Maker Fair at NySci - a sample of the rockets

In addition to the giant rockets always on site at the NY Hall of Science (NySci) this event had 3D printed rockets and paper rockets made by kids and lofted with an extra-powerful compressed air system that sent the better built rockets up over 150 feet.

Friday, October 4, 2013

Bunker Buster Bomb Testing - Concrete, Steel, and Sand

Wasserfall NAZI Surface to Air Missile

Wasserfall was essentially an anti-aircraft development of the V2 rocket, sharing the same general layout and shaping. Since the missile had to fly only to the altitudes of the attacking bombers, and needed a far smaller warhead to destroy these, it could be much smaller than the V2, about 1/4 the size. The Wasserfall design also included an additional set of fins located at the middle of the fuselage to provide extra maneuvering capability.

Guidance was to be a simple radio control MCLOS system for use against daytime targets, but night-time use was considerably more complex because neither the target nor the missile would be easily visible. For this role a new system known as Rheinland was under development. Rheinland used a radar unit for tracking the target and a transponder in the missile for locating it in flight, read by a radio direction finder on the ground).

A simple analog computer guided the missile into the tracking radar beam as soon as possible after launch, using the transponder to locate it, at which point the operator could see both "blips" on a single display, and guide the missile onto the target as during the day. Steering during the launch phase was accomplished by four graphite rudders placed in the exhaust stream of the combustion chamber, and (once high airspeeds had been attained) by the four air rudders mounted on the rocket tail. The original design had called for a 100 kg warhead, but because of accuracy concerns it was replaced with a much larger one (306 kg) based on a liquid explosive. The idea was to create a large blast area effect amidst the enemy bomber stream, which would conceivably bring down several airplanes for each missile deployed. For daytime use the operator would detonate the warhead by remote control.