Bristol Spaceplanes

Bristol Spaceplanes Ltd.
Private
Industry Aerospace
Founded 1991
Key people
 David Ashford (Managing Director)
Products Space Tourism, Spaceplanes
Website http://www.bristolspaceplanes.com/

Bristol Spaceplanes (BSP) is a British aerospace company based in Bristol, England, who have designed a number of spaceplanes with sub-orbital and orbital capabilities. The company's stated goal is "to realise low-cost access to space",[1] primarily through reusable launch vehicles, claiming the cost of human space travel has the potential to be reduced by a factor of 1,000.[2]

History

The company was founded in 1991 by David Ashford and has received three feasibility grants in 1993, 2003 and 2011 for the Ascender and Spacecab projects.[1] A scaled down radio-controlled version of the Ascender spaceplane was successfully flown in 1998.

In September 2014 the firm launched a crowdfunding campaign to aid in the development of Ascender, aiming to raise £150,000.[3][4]

In late 2014, the company was conducting bench testing of rocket engine designs for Ascender and is seeking funding to build a working model via crowdfunding.[5]

Throughout the lifetime of the company David Ashford has released a number of published books and papers based around the aerospace industry and the exploration of space.[6][7][8]

Conceptual vehicles and spacecraft

Ascender

Ascender is a proposed small two-seater suborbital horizontal-takeoff, horizontal-landing (HTHL), jet- and rocket- powered spaceplane concept which is designed to be able to achieve altitudes of up to 100 kilometres (62 mi) via a steep sub-orbital trajectory.[9]

This would allow it to be used for space tourism activity as well as microgravity research during the two minutes of weightlessness. The vehicle would take off from a typical runway using its two turbofan jet engines and climb to cruising altitudes. It would then switch to its hydrogen peroxide rocket engine and climb past 80 kilometres (50 mi) and then would reenter the atmosphere and glide back to the runway it took off from, using its jet engines to maneuver.

The majority of attention and energy of the company has been focused on the Ascender launcher due to its short term feasibility compared to the other projects. It has been designed to not require any new materials or unproven components.[9]

Spacecab

The Spacecab spaceplane design concept consists of a large crewed "carrier" aircraft with a smaller "orbiter" attached on top, both of which are derived from Ascender. The carrier would take off from an airstrip and use its turbofan engines to accelerate to mach 2 at which point it would switch over to its LOX/Kerosene rocket engines to accelerate to mach 4. The orbiter craft would then detach and accelerate to orbital speeds and altitudes using its LOX/LH2 rocket. It would be capable of delivering up to 750 kg to low earth orbit, and also transporting supplies and crew to the International Space Station, an increasingly important capability following the retirement of the Space Shuttle. Spacecab can be thought of as the intermediate next step in development between Ascender and Spacebus, and like Ascender it does not require any new technology or materials and has been the subject of a 1994 feasibility study confirming this claim.[10]

Spacebus

The Spacebus spaceplane concept is the largest, most ambitious, costly and difficult project proposed by the company. It has a similar, but scaled up design to Spacecab with a "carrier" craft accelerating up to mach 4 with Ramjet engines and then up to mach 6 with rocket engines. The smaller "orbiter" would then detach and accelerate into orbit with LOX/LH2 rocket engines with a payload of up to 5000Kg or 50 passengers. Despite requiring a new Ramjet design and significant developments with the heatshield, rocket engines, hydrogen fuel system and transparencies, Spacebus is still claimed to be considerably more feasible and cheaper than other ongoing spaceplane projects such as Skylon.[11]

See also

References

  1. 1 2 "Bristol Spaceplanes Company Information". Bristol Spaceplanes. 2014. Retrieved 11 September 2014.
  2. ↑ "Bristol Spaceplanes joins tourism race". The Financial Times. 2014. Retrieved 11 September 2014.
  3. ↑ "The Market For Bristol Spaceplanes". Bristol Spaceplanes. 2014. Retrieved 11 September 2014.
  4. ↑ Bristol firm enters commercial space race Daily Telegraph 23 February 2014
  5. ↑ "Bristol Spaceplanes Crowdfunder". Retrieved 19 December 2014.
  6. ↑ "Space Exploration- All that Matters". Bristol Spaceplanes. 2014. Retrieved 11 September 2014.
  7. ↑ "Spaceflight Revolution". Bristol Spaceplanes. 2014. Retrieved 11 September 2014.
  8. ↑ "Your Spaceflight Manual/". Bristol Spaceplanes. 2014. Retrieved 11 September 2014.
  9. 1 2 "Ascender Project Specifications/". Bristol Spaceplanes. 2014. Retrieved 11 September 2014.
  10. ↑ "Spacecab Project Specifications/". Bristol Spaceplanes. 2014. Retrieved 11 September 2014.
  11. ↑ "Spacebus Project Specifications/". Bristol Spaceplanes. 2014. Retrieved 11 September 2014.
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