On Mar 26, 4:28 am, "Ian Strachan" wrote:
On Mar 25, 12:33 pm, wrote:

On Mar 25, 6:16 am, "Ian Strachan" wrote:

...there is no problem with the cockpit
noise signatures of MGs powered by internal combustion engines
whether they be four-stroke, two-stroke or Wankel (rotary).

That is, other than hearing-loss ;-)

True. Myself, I (almost) always wear a headset when running a Motor
Glider engine in the air.

In the UK Air Force there was a syndrome called "Shackleton Ear" which
was permanent deafness on certain frequencies. The Shack had four
Griffon piston engines (a sort of "double Merlin") and flew maritime
patrol sorties many hours long. People who got "the ear" were
generally those who took off their headsets for long periods of time.

Ian Strachan
Lasham Gliding Centre, UK

Right, many motor-gliders have noise levels in the cockpit
high enough to cause hearing damage. Getting the headset
on prior to an air-restart while getting low is always fun...

Antares 20E comes with a light-weight headset as they want to
be sure you hear any system warnings (audio messages, fed
through the radio side-tone). But its not a hearing-damage issue !

Best Regards, Dave