Voor jullie info
Project duurde 4 1/2 maand van idee tot lancering, lancering was op 6 O hybride motoren van Contrail, waarvan er 2 airstarts waren, daarnaast een groot aantal Cesaroni vaste brandstof motoren. Geheel woog 1400 kg. Hierbij wat verdere gegevens in het engels. In de toekomst hopen we meer van dit soort projecten in de lucht te krijgen, en o ja, de inslag was een 500 ponder die op het oefenterrein werdt afgestoken, dus dat was meer voor de special effects voor de media daar de robin helaas niet los kwam, maar er waren problemen hiermee en er was een deadline helaas dus kon dit niet goed worden opgelost.
groeten
Frank De Brouwer
www.rebelspace.eu
1/5th scale Space Shuttle.
As a direct replacement for the Orbiter a Reliant Robin was utilised.
From start to launch the project was 4.5 months.
Some technical specs.
_________
Propulsion:
_________
Total impulse well over 200,000 Ns (somewhere in R impulse).
The main propulsion was in 2 stages:
Stage 1: x4 O class hybrid motors + several CTI composites (to offset thrust
asymetry)
Stage 2: Post SRB jettison air start a cluster of x2 O class hybrid motors.
(Active separation utilised x2 pairs of composite motors in the nose of each
SRB)
_____________
Mass Distribution
_____________
Lift off mass: over 1400kg.
Robin mass: circa 250 kg. (of which 40 kg was ballast to provide correct CG/CP relationship when( although it didn't) the orbiter separated for a glide to earth.
SRBs: 102 kg each.
External tank: 951 kg (of which around 1/4 tonne was nose weight including main Ex tank parachute which was 50 kg) As you can imagine the flight dynamics CG, CP changed with the jettison of the SRBs so positioning of the 2nd cluster of O motors was important (also to generate a pitch down moment to assist in orbiter separation) _________________ Flight profile _________________
1. Launch.
2. SRB separation and recovery.
3. second stage boost.
4. Orbiter separation and powered glide to earth.
5. Ex tank recovery under a very large cargo parachute (that weighed 50 kg on its own!).
Items 4 and 5 did not happen. (we had a technical issues with this that we were all aware of prior to launch, but the show had to go on and decisions were made, the criteria for a successful telly programme are, remember, different from what a conventional rocket launch might be.) ________ Altitude ________
The programme advertised a peak altitude if 3000ft.
___________________
Dynamics and simulation
___________________
A whole world of real pain.
As you can imagine, the variables involved were all coupled.
Thrust asymmetry and aerodynamic asymmetry were real and significant factors.
All were, however measured and quantified.
To place this into context, the simulation package we developed was replicated exactly in the actual flight.
___________
Flight Control
___________
Under boost the vehicle was passively stable.
The vehicle utilized elevons on the orbiter (reliant robin) for glide recovery.
> etc. Did anything useable survive?
The SRBs recovered intact under x2 large x-form parachutes.
The O motors were recovered plus various bits of hardware.
The Robin (orbiter and Ex tank were mangled and below surface level)
Colin Rowe: Designer, builder and Chief Engineer of the Reliant Robin Space Shuttle.
James MacFarlane: Technical consultant, Reliant Robin conversion (car to
glider) specialist and the guy to ask when a REAL technical question comes up.
Chris Brown: Build supervisor, man of steel and resolve.
Kevin Timmins: Build engineer and chief composite material bloke.
George Thompson: Build Engineer and voice of common sense.
Richard Osborne: Electrical support, engineer, voice of reason, assembler of the 20 composite motors that supplemented the 6 O class main Contrail powerplants.
David Warman: Electrical implementer, gather of resource and support for James during assembly and launch.
Martin Sweeney: Assistant to Colin in hybrid motor assembly, general build engineer and support.
Tom Sanders: Designer and deliverer of the bespoke (though now standard and commercially available) O-6300 main powerplant in a very tight timescale.
In addition,
the project attracted the input of over 60 other companies and verging on perhaps 200 different individuals over and above the aforementioned.
We won't make mention of them here as you won't know them.
(Include the television production side of things...then the numbers inflate somewhat more.......I'd be guessing.)
These people worked to the tightest of deadlines, in sometimes
(understatement) difficult conditions without unwarranted whinge or complaint.
4.5 months from go ahead to flight is pretty impressive.
__________________________________
Although it was labeled as light entertainment (which it most certainly was)...
At over 27 metres cubed and over 1.4 metric Tonnes with peak thrust of over
8 metric tonnes,
Identify the complexity and enormity of what they have achieved.
It's the largest, most complicated affair that's been launched outside governmental coffers, in Europe, I think. (Others know more than me, I'll let them discuss this one!)
As an aside, the telly peeps understand this too and stand in awe.
Chief Tea maker, provider of Bacon sandwiches and ditherer,
Damian Hall
Great list of some of the people involved, but if it were not for the one person who had this great idea and had the balls to run with it and sell it to the BBC we would never had done it.
Projects like this need someone to pull lots of things together to make it work.
To smooth out the bumps and make things happen and not let other peple worry about it.
They take all the flak and protect the others from it.
In the end they do a lot of things to get the project finished, along the way making and losing fiends.
This is the most thankless, unrewarding task and also one of the most mis understood, and one I could not do.
So to this list I add..............
Mr Damian Hall: Mover and Shaker the one who kept the dream alive when most of us just wanted some sleep, greaser of wheels, Mr Motivator. Mr Meetings Jack of all trades, sliver tongue talker, and Friend.
Thanks to you for everything.
Colin Rowe
Seconded.
Damian plays down the fact that the reason such an asymmetric vehicle flew like it was on rails was down to the enormous amount of calculations and simulations that he had to perform before and during the construction of the vehicle. The fact that it flew so well was amazing. I was fairly convinced it would arc over after leaving the launch pad. How wrong was I?
That was just part of his technical contribution, I wouldn't start to venture at the size of the list of other things he had to do to make the project happen. It was a very, very big list.
It's the SRBs that get me. The way the separation motors fired, the clamps released and the SRBs peeled off like clockwork was stunning. A real testament to Colin, Damian and Chris's engineering and James Macfarlane's avionics.
Good to see what Rowe's Retainers Custom Engineering Services produces too
All the best,
Richard Osborne