What's the difference between a rubber pad at -60 degrees and a bit of aluminium at -60? I would guess not a lot, therefore I question what the rubber is going to achieve?
There's some lively debate going on down at the Reg forums LOHAN mosh pit regarding whether using a metal rod launch system for our Vulture 2 spaceplane really is the way to go. Click here for a bigger version of the LOHAN graphic We're delighted that you lot have taken the time to do a bit of head-scratching on what is one …
Monday 23rd April 2012 12:46 GMT Andus McCoatover
If the rod was heated somewhat before release..
Surely some kind of ASBO (Assisted Stratospherically Barometrically Operated) heating system would put the worries to rest.
Just thinking about a couple of iMac lap-warming batteries, strategiatrlly placed, and shorted out when the ASBO comes into force, might see off the ice before release of LOHAN...?
Monday 23rd April 2012 12:48 GMT Doug 14
Monday 23rd April 2012 13:23 GMT Ralph B
Re: How about this ?
That deals with rocket blowing the truss backwards, but increases the risk of LOHAN sticking - since she's now being penetrated by two rods rather than one. (snarf.)
I think LOHAN sticking is as big a potential problem as LOHAN pushing the truss backwards. If she sticks she'll pull the truss forwards and launch directly at the balloon, or even spin round and round like a high-altitude catherine-wheel.
Monday 23rd April 2012 13:14 GMT StillNoCouch
Pack the her rod with waming goodness ?
If you're modifications include switching from a Titanium "rod" (solid) to a Titanium "tube" (hollow), one could consider filling the tube with the contents of those disposable hand warmers (iron powder, salt, activated charcoal & vermiculite).
Although this requires air to work, if the tube could be ventilated with small pin-sized holes along it's top, that should provide sufficient air to enter with the holes being too small to leak the granular substance (possibly strain or sift first to remove the finest particles, but this would require a test to ensure you didn't sift out too much of the active ingredients).
I imagine that icing only occurs at 'relatively low' altitudes, so the tube would only have to be warmed for the first stages of ascent ... probably not the whole way up ( but I have patently NO understanding of the physics and conditions here and I'm likely illustrating my dire need of additional IQ points )
To counter the "reaction affect" of the engine on the aluminum plate, consider using a wire screen of some sort .. would provide you with ample surface area while allowing the thrust of the engine to pass through the 'barrier' with little-to-no resistance.
Monday 23rd April 2012 13:46 GMT Francis Boyle
Monday 23rd April 2012 17:47 GMT Bigpatc
Monday 23rd April 2012 18:15 GMT Anonymous Coward
What does the truss actually do?
Suspend the avionics under balloon (on a short stiff rod if you want to reduce swing) with the launch guide projecting up & away...from the lowest point to keep the rocket exhaust clear...
O balloon (not to scale)
[ ]/ avionics with launch rod
(hope it dosnt strip spaces)