Feeds

Vulture 2 takes a battering in 100km/h test run

Still in one piece, but we're going to need MORE POWER

  • alert
  • submit to reddit

Intelligent flash storage arrays

Vid Watch Video

The Low Orbit Helium Assisted Navigator (LOHAN) team is still crunching numbers from last Friday's test run of the Vulture 2 spaceplane, which came at the end of an intensive week of brain surgery on the aircraft's Pixhawk autopilot.

Hats off to Linus Penzlien and Andrew Tridgell for crafting and installing the custom APM:Plane mission parameters/commands, more on which can be found here.

We'd already prepared a magnificent shed-built platform to mount the Vulture 2 atop a van...

The Vulture 2 mounted atop the van

...and with all systems ready to roll, we were ready to give the thing a blast. The specific aims of the test were:

  • Ensure the plane wasn't going to fall apart
  • Ensure the avionics, electrical connections, etc, weren't going to fall apart
  • Check Pixhawk GPS, compass, airspeed sensor, and so forth
  • Gauge battery performance
  • Try out Pixhawk MAV_CMD_NAV_ASCEND_WAIT command

This last item, according to Tridge, "is an AUTO mode command that is used to wait for LOHAN to ascend to the needed altitude, wiggling servos on the way"

"While ascending the servos will move through their full range every wiggle_time seconds."

The purpose of the command is to prevent the servos freezing on the ascent as the Vulture 2 soars majestically heavenwards under the helium balloon. In this case, we set wiggle_time to 15 seconds.

Before strapping the plane to the van, we took a moment to address complaints that there simply aren't enough pipes on this project. Lest anyone doubt we have sufficient boffinous accoutrements for the job, here's Linus setting the record straight...

Linus Penzlien with the Vulture 2 just before the test run

...and here he is lashing down the spaceplane:

Linus assembles the Vulture 2

Our 20-minute blast down the King's highway began at the village of San Lorenzo, hitting Barco de Avila before we retraced our route, thundered through San Lorenzo at 100km/h and finally returned to the start point:

Our test route overlaid on Google Maps

Here's a still from the vid (see top of the story) at 60km/h (58.46km/h, according to the Pixhawk logs)...

GoPro vid grab of the first run at 60km/h

...and here's the APM Mission Planner view:

APM Mission Planner during the test run

At 100km/h (according to the van's speedo, 93km/h according to the logs), the Vulture 2 was taking a bit of a pasting:

A GoPro vid still from the 100km/h run of the Vulture 2

If you check out the vid at the top of the article, you can just see the starboard canard obeying the MAV_CMD_NAV_ASCEND_WAIT command. We had to disconnect the port canard and rudder servos for reasons we'll explain in a bit.

Try a couple of graphs, then, showing Pixhawk GPS speed, and airspeed sensor data overlaid:

Graph showing GPS speed during the test run

GPS and airspeed indicator speed during the test

Pretty good. Everything else worked a treat on the run, except the compass, which was evidently disturbed by the van's metal bulk. We've still got plenty of data to plough through, including the results from the accelerometers, so that'll keep us off the highway for a while.

Providing a secure and efficient Helpdesk

More from The Register

next story
SECRET U.S. 'SPACE WARPLANE' set to return from SPY MISSION
Robot minishuttle X-37B returns after almost 2 years in orbit
No sail: NASA spikes Sunjammer
'Solar sail' demonstrator project binned
LOHAN crash lands on CNN
Overflies Die Welt en route to lively US news vid
You can crunch it all you like, but the answer is NOT always in the data
Hear that, 'data journalists'? Our analytics prof holds forth
Experts brand LOHAN's squeaky-clean box
Phytosanitary treatment renders Vulture 2 crate fit for export
Carry On Cosmonaut: Willful Child is a poor taste Star Trek parody
Cringeworthy, crude and crass jokes abound in Steven Erikson’s sci-fi debut
Origins of SEXUAL INTERCOURSE fished out of SCOTTISH LAKE
Fossil find proves it first happened 385 million years ago
America's super-secret X-37B plane returns to Earth after nearly TWO YEARS aloft
674 days in space for US Air Force's mystery orbital vehicle
prev story

Whitepapers

Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Cloud and hybrid-cloud data protection for VMware
Learn how quick and easy it is to configure backups and perform restores for VMware environments.
Three 1TB solid state scorchers up for grabs
Big SSDs can be expensive but think big and think free because you could be the lucky winner of one of three 1TB Samsung SSD 840 EVO drives that we’re giving away worth over £300 apiece.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.