Disappointed, looking forward to a Martin Mars!

So you don’t think it cool to fly to Mars…and in Mars ? :highly_amused:

current status

And in 50 minutes from Heathrow to Los Angeles…since the scramjet can be ignited at the end of the rail….after some time on the rockets.

:highly_amused:

Reality check here may be needed.

Corcorde trip NY-Paris-NY was already way back 10 000 usd….so if we take the passengers also to 60 km altitude to feel weightlesness too for a while…maybe 30 – 40 000 £ ticket is closer to the truth.

https://answers.yahoo.com/question/index?qid=20080704145008AAGT9g6

Elon Musk says we are nearly there; http://www.businessinsider.com/commercial-aircraft-in-2050-looks-brilliant-2014-11

You might be interested reading that interview with Ric Parker: Director of research and technology, Rolls Royce:

http://www.theengineer.co.uk/in-depth/interviews/ric-parker-director-of-research-and-technology-rolls-royce/1019368.article

There is an interesting part regarding new pusher prop engines being (re)envisioned for large airliners

Very nice reading !

There is also a firm named QinetiQ in the UK that has done outstanding work with solar powered remote controlled models.

Electric engines have one major advantage over jets and pistons….they produce less drag as they don’t breath air….and second….they can be placed where ever you want….since they are very lite in weight.

Here is the NASA Helios from 2004..it is the most remarkable aviation happening ( or phenomena even ) in the 21st centurys first decade; http://www.nasa.gov/centers/dryden/pdf/163836main_Helios_05_02.pdf

Its not a case of propeller aircraft being concieved as loud but in this case the fact that pusher props make an annoying noise…somtimes loud noises can be pleasant . Its not a volume issue although that tend to be more noisey than tractor props.

If you have nine meter dia props they don’t even have to turn very fast to reach the speed of sound…and at high where Baumgarter and Eustace broke the speed of sound without an aeroplane there won’t be much of the sound either the air is so thin.

Pic from here; http://mesoslaunch.blogspot.fi/

The unducted fan seemed to have fail due to the very high noise levels. There was a MD-80 and a Boeing 727 with one fitted…the MD-90 was originally going to be the -80 series with UDF.

The UDF was louder than the remaining jet engines. The UDF BN Islander was soon converted to conventional engines.

There was the Optica and that buzzed around like an angry bee

LZ129 also had pusher props.

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Discussion; https://uk.answers.yahoo.com/question/index?qid=20110605122812AAYKi7G

Also the FLYER !