Feeds

LOHAN twangs BRASTRAP to unfetter mighty orbs

Our flight abort doomsday box will make fire in the sky

High performance access to file storage

Pics+Vid Capping a hectic month for the Low Orbit Helium Assisted Navigator (LOHAN) team - in which we revealed the magnificent Vulture 2 spaceplane, rescued our heroic playmonaut from the side of a Spanish mountain and finally got a rocket motor igniter to go bang at 20,000m - we're delighted to report that the Big Red Abort Switch To Release Aerial Payload (BRASTRAP) doomsday box is up and running and ready to make fire in the sky.

To recap, the powers that be decided that anyone intending to mount a rocket-powered spaceplane under a fantastical flying truss, and suspend that from a mighty helium-filled orb, will require the services of an emergency cut-down lest the payload menace a centre of population.

Cue said box of doom, constructed by LOHAN team member Dave Akerman, and named by a popular vote which secured reader Steve Davis a Rock Seven RockBLOCK Iridium satellite comms unit. Here's the BRASTRAP, ready for use by anyone with a black leather swivel chair and a white Persian cat:

Dave Akerman's emergency cut-down box

The BRASTRAP contains a Raspberry Pi...

The interior of the BRASTRAP doomsday box

...programmed to send an abort text message via wireless net connection, the Rock Seven servers, Iridium ground station, Iridium satellite network and finally the airborne RockBLOCK...

Top and bottom views of the RockBLOCK

...which in turn commands an attached Arduino Mini Pro to fire a pyrotechnic cut-down using a MOSFET:

Top and bottom views of the RockBLOCK-Arduino sandwich

There's more on the RockBLOCK-Arduino sandwich, and just how the abort system works, right here, but what you really want to know is, does this impressive rig actually deliver?

The answer, dear readers, is an explosive yes, as ground-based tests last week showed. Here's a sequence of video stills showing what happens to a small cut-down attached to the Arduino, about 60 seconds after you hit the BRASTRAP big red button (click on snap for engorged imagery):

Montage of video stills of the cut-down firing

The cut-down - put together by LOHAN rocket wrangler Paul Shackleton - comprises a stainless steel tube with a hole through which the payload suspension cable passes. A steel bolt inside the tube, driven by explosive charge trigged by E-Match*, simply blasts its way across the cable aperture, severing the cable and cutting free the payload.

Of course, Paul felt obliged to knock up a bigger version of the above, should we find ourselves having to cut steel hawsers, carbon fibre nanontube woven cables or Kevlar-coated titanium rope, and here's the resulting "tube of death" doing the business:

Our large pyro cut-down before and during firing

The stills don't do the cut-downs justice, so try this quick video overview of BRASTRAP and the cut-down system, which features moving pictures of things going bang:

Watch Video

Good stuff. So, that's the emergency cut-down sorted, and we think it's fair to say that never has so much impressive technology been deployed for the simple proposition of cutting a string in the stratosphere. ®

Bootnote

*Both components were tested at altitude during last week's rocket motor igniter flight, so we don't anticipate any problems.


Further LOHAN resources:

  • New to LOHAN? Try this mission summary for enlightenment.
  • You can find full LOHAN coverage right here.
  • Join the expert LOHAN debate down at Reg forums.
  • All the LOHAN and Paper Aircraft Released Into Space (PARIS) vids live on YouTube.
  • For our SPB photo archive, proceed directly to Flickr.
  • We sometimes indulge in light consensual tweeting, as you can see here.

LOHAN - A Special Projects Bureau production in association with...

  • 3T RPD logo
  • University of Southampton logo
  • Applied Vacuum Engineering logo
  • Escher Technologies
  • Flashpoint Fireworks logo
  • HAB Supplies logo
  • Rock 7 logo

Paper Aircraft Released Into Space

High performance access to file storage

More from The Register

next story
Elon Musk's LEAKY THRUSTER gas stalls Space Station supply run
Helium seeps from Falcon 9 first stage, delays new legs for NASA robonaut
Solar-powered aircraft unveiled for round-the-world flight
It's going to be a slow and sleepy flight for the pilots
Russian deputy PM: 'We are coming to the Moon FOREVER'
Plans to annex Earth's satellite with permanent base by 2030
LOHAN's Punch and Judy show relaunches Thursday
Weather looking good for second pop at test flights
Saturn spotted spawning new FEMTO-MOON
Icy 'Peggy' looks to be leaving the outer rings
Discovery time for 200m WONDER MATERIALS shaved from 4 MILLENNIA... to 4 years
Alloy, Alloy: Boffins in speed-classification breakthrough
India's GPS alternative launches second satellite
Closed satnav system due to have all seven birds aloft by 2016
Curiosity finds not-very-Australian-shaped rock on Mars
File under 'messianic pastries' and move on, people
Top Secret US payload launched into space successfully
Clandestine NRO spacecraft sets off on its unknown mission
prev story

Whitepapers

Mainstay ROI - Does application security pay?
In this whitepaper learn how you and your enterprise might benefit from better software security.
Five 3D headsets to be won!
We were so impressed by the Durovis Dive headset we’ve asked the company to give some away to Reg readers.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Mobile application security study
Download this report to see the alarming realities regarding the sheer number of applications vulnerable to attack, as well as the most common and easily addressable vulnerability errors.