A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Soaring
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

'Problem' with Antares 20m?



 
 
Thread Tools Display Modes
  #1  
Old August 4th 06, 05:43 PM posted to rec.aviation.soaring
Ray Lovinggood
external usenet poster
 
Posts: 137
Default 'Problem' with Antares 20m?

From the following webpage:

http://www.aerokurier.rotor.com/akNachr/aeNewsE.htm


Antares too quiet
Lange Flugzeugbau faces an unusual hurdle with the
type certification of its electric glider, Antares.
The required noise level measurement according to Chapter
X was not possible. The noise emissions from the 20-meter
self-launching glider are so low that it can't be heard
above the ambient sound of the surrounding environment.
But the measurements are mandatory for the EASA certification.
Even a modified measuring process failed to produce
data that could be converted to values suitable for
compliance with Chapter X. It has simply never happened
befo An aircraft that is actually too quiet.



  #2  
Old August 4th 06, 06:18 PM posted to rec.aviation.soaring
Stefan
external usenet poster
 
Posts: 578
Default 'Problem' with Antares 20m?

You can read the full story he
http://www.lange-flugzeugbau.com/htm...asurement.html

BTW, the Antares has received EAS certification on the 14th of July.

Stefan
  #3  
Old August 4th 06, 06:35 PM posted to rec.aviation.soaring
Greg Arnold
external usenet poster
 
Posts: 251
Default 'Problem' with Antares 20m?

Ray Lovinggood wrote:
From the following webpage:

http://www.aerokurier.rotor.com/akNachr/aeNewsE.htm


Antares too quiet
Lange Flugzeugbau faces an unusual hurdle with the
type certification of its electric glider, Antares.
The required noise level measurement according to Chapter
X was not possible. The noise emissions from the 20-meter
self-launching glider are so low that it can't be heard
above the ambient sound of the surrounding environment.
But the measurements are mandatory for the EASA certification.
Even a modified measuring process failed to produce
data that could be converted to values suitable for
compliance with Chapter X. It has simply never happened
befo An aircraft that is actually too quiet.


I wonder if it makes enough noise for engine operation to be recorded by
the ENL function of a flight recorder.
  #4  
Old August 4th 06, 08:03 PM posted to rec.aviation.soaring
Andor Holtsmark
external usenet poster
 
Posts: 7
Default 'Problem' with Antares 20m?

The original story: http://lange-flugzeugbau.com/htm/english/news/
noise_measurement.html
(Note our brand new homepage. Much more info in it
now)

At 17:36 04 August 2006, Greg Arnold wrote:
I wonder if it makes enough noise for engine operation
to be recorded by
the ENL function of a flight recorder.


Due to the RPM of the engine, the LE42 propulsion system
produses most of its noise on exactly the same frequence
which flight recorders pick up. There is no problem
recognizing powered flight.

cheers,

Andor



 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Heater problem fixed! Jim Burns Owning 14 December 17th 04 11:38 PM
RF interference issue again (esp. for E Drucker and Jim Weir and other RF wizards) Snowbird Owning 77 December 3rd 03 10:10 PM
Help with serious Glider Registration Problem Soaring 5 November 12th 03 05:01 PM
EGT Problem Dennis O'Connor Owning 4 August 27th 03 04:25 PM
Problem: Ground Speed Estimate with Volkslogger and WinPilot RamyYanetz Soaring 3 August 26th 03 03:06 PM


All times are GMT +1. The time now is 12:21 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 AviationBanter.
The comments are property of their posters.