Original URL: http://www.theregister.co.uk/2012/02/20/lohan_truss/
LOHAN flashes fantastical flying truss
Experimental Vulture 2 launch platform
It's taken us a while, and a not inconsiderable amount of head-scratching, but we've finally come up with a design for the Low Orbit Helium Assisted Navigator (LOHAN) launch platform.
Those of you who've been following LOHAN will recall the invitation to our beloved readers to present their best ballocket launch concepts, which attracted some top-notch ideas on the best way to carry our Vulture 2 vehicle aloft.
We took all these suggestions on board, and found further inspiration here, following a tip-off from a reader who reckoned a triangular truss suspended between two balloons offered the best solution.
We were inclined to agree, and in the best garden shed boffinry tradition, set about putting together a model of a LOHAN flying truss. Cue some 6mm balsa wood dowels, and the Paper Aircraft Released Into Space (PARIS) jig methodology deployed on the construction of our Guinness World Record Vulture 1 aircraft:
Here's one face of the truss progressing nicely. We used Super Glue to speed up the build, but reinforced the joints after assembly with PVA wood glue...
A sheet of balsa provides a platform for mounting test equipment...
...as you can see here on one finished face of the truss (two metres long, in case you were wondering):
Then it was just a matter of forming the triangular section...
...and sticking in the diagonal braces...
...before applying a coat of high-vis paint and handing the structure to apprentice boffin Katarina for the official roll-out photo:
We're just waiting on a bottle of helium and some balloons, and once they turn up we'll see if the thing flies with a camera attached.
Note that our cunning plan involves using the truss "upside down", but we're pretty sure it's strong enough in this configuration, which has the clear advantage of offering a substantial level launch platform and plenty of horizontal area to mount other kit, as you can see in our new LOHAN mission summary (click on image for a bigger version):
So, next up is a test flight for our model structure, and if it does the job we'll get to building a full-size version from carbon fibre tubes. Expect dramatic video footage of the fantastical LOHAN flying truss in due course...®
Further LOHAN resources:
- New to LOHAN? Try this mission summary for enlightenment.
- You can find full LOHAN coverage right here.
- 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 tweeting, as you can see here.