Social Media Sidebar


Please sign up, comment on articles and bring your friends!

Current poll

PlanetTech is asking:

What do you think about our new web site?

Love it, indeed
Really good solution
Same as old one
The old one was better
This is a new option

Quote of the day

We are all now connected by the Internet, like neurons in a giant brain.


Stephen Hawking


Skylon spaceplane developers reveal the antifreeze method for the sabre hypersonic engine

Posted in Science on 11th Jul, 2015 11:44 PM by AlexMuller

Reaction Engines of the UK is developing the hypersonic Synergetic Air-Breathing Rocket Engine (Sabre). It is designed to power a vehicle from a standing start to Mach 5.5 in air-breathing mode, and from the edge of the atmosphere to orbit in rocket mode.


A fundamental enabler of the concept is a complex heat-exchanger system made up of miles of fine tubing that allows oxygen to be taken straight from the atmosphere for use as fuel.

The system chills incoming air from more than 1,000C to minus 150C in less than 1/100th of a second before passing the pre-cooled air through a turbo-compressor and into the rocket combustion chamber, where it is burned with sub-cooled liquid hydrogen. But until now the means by which the system does this without clogging up the pre-cooler with ice has remained a closely guarded company secret.
Reaction Engines uses methanol as an antifreeze. The methanol is used with the objective of minimizing the amount that is needed. They use chemical process industry tricks.
* inject the methanol at one of the coldest points 
* get the mix of water and methanol to flow forward in the matrix, against the direction of the airflow
* use multiple injection and extraction points in the matrix
* Eventually you end up with a situation where you have extracted all the water vapor as liquid from the airflow and that leaves you essentially with dry air below 215 Kelvin. The partial pressure of the water vapor at this point is so low that you can allow it to pass through the heat exchanger and it does not freeze
Reaction Engines decided to go public with the frost control technology because of pending patent applications. “The trigger for patenting was the awareness that to execute this program we are going to have to involve other companies,” says Mark Thomas, former chief engineer for technology and future programs at Rolls-Royce, who recently took the reins as managing director of Reaction Engines.
“You can’t keep trade secrets very long in that situation, so it is better to be protected formally and legally on the clever stuff.” Thomas adds that Reaction is close to “having those approved.”
The company is developing the Sabre engine principally for the Skylon single-stage-to-orbit spaceplane. But the propulsion system and its pre-cooler technology are attracting wider interest for potential aircraft and two-stage launch vehicle applications.

Tags: spacespaceplanesingle stage to orbitSkylonSABREhardware

Read original article » Back to category


Author: Guest
Posted: 2015-07-12
Indeed, new clever staff needs to be formally and legally protected by patents in engineering and otherwise... Reply


Recent headlines

  • Posted in Medicine on 2017-07-26 17:05:11
    Eye test could help diagnose more
    Posted in Science on 2017-07-26 16:55:24
    Cognitive cross-training enhances learning, study more
    Posted in Software on 2017-07-26 16:45:19
    AI Grant aims to fund the unfundable to advance AI more
    Posted in Medicine on 2017-07-25 15:53:01
    New blood test can check for 13 types of more
    Posted in Science on 2017-07-25 15:47:06
    The Moon Is Seriously Loaded With Water, More Than more
Posted in Business on 2013-10-10 01:33
China is working towards a manned lunar mission in more
Posted in Business on 2013-10-20 07:17
Spacex says China is their main competitor for more
Posted in Software on 2013-10-20 06:43
Pirate Bay Browser Clocks 1,000,000 more
Posted in Medicine on 2013-10-10 02:10
Google reportedly investing hundreds of millions into more
Posted in Medicine on 2013-10-14 03:13
Endothelial Cells Can Repair and Regenerate Organs, more
Posted in Science on 01.01.2010
Spacex says China is their main competitor for more
Posted in Science on 01.01.2010
Staring at Your Phone Could Be Making You Short more
Posted in Science on 01.01.2010
Oculus Rift virtual reality headset coming to mobile, more
Posted in Science on 01.01.2010
China is working towards a manned lunar mission in more
Posted in Science on 01.01.2010
Delivering drugs via nanoparticles to target more

Recent Blog Posts

  • Posted by AlexMuller
    Nanoparticle vaccine shows potential as immunotherapy to more
    Posted by AlexMuller
    Obesity is top cause of preventable life-years lost, study more
    Posted by AlexMuller
    Light can be utilized to control gene more
    Posted by AlexMuller
    Brain stimulation restores memory during lapses, research more
    Posted by AlexMuller
    Wax worm caterpillar will eat plastic shopping bags: more

Login to your Account

Login to your PlanetTech Account here

Remember me

Create a New Account

You just need username and password

The following errors occured:
Verify password:
Remember me