Thanks -
The Ban-Bi doesn't really exist on my side of the pond, and doesn't have
the motorglider wings. In any case, I just finished a test flight in
N111EU and was very pleased to find that it's about 10dB quieter than a
C150/C172, with very little soundproofing. Kim Prout has a very clean
ship with a very well balanced prop, which assuredly contributes to it.
Incidentally, check out the CAFE website - their test report finally
came out. Noise levels are really quite good compared to other aircraft
in its class.
ss
----- Original Message -----
From: Jerry Davis
Subject: Re: New subscriber intro
A VP prop can drop cruise RPM by around 500rpm. Active noise headsets
may improve low end noise. Good passive headsets (we sell LYnx which
were made for microlights) may help. Have you tired a flight in an
MCR01. I think they are quieter than the Europa because the stiff carbon
structure has different resonance.
Jerry
lts@avnet.co.uk
http://www.avnet.co.uk/touchdown
----- Original Message -----
From: Shaun Simpkins
Subject: New subscriber intro
Hello, all-
I'm contemplating purchasing an Europa XS motorglider kit shortly.
I've been impressed by the basic kit and the finish quality of the
builder-completed planes that I've had opportunity
to view. I'll be test flying one in a few days.
One of my intentions for this project is to attempt some experiments
in cockpit noise reduction (I know what ANR headsets can do - earplugs
are actually better for certain
frequencies!) My initial measurements of sound levels outside and
inside the aircraft show a noticeable reduction vs. your typical Cessna
150/172. I'd be interested to know if anyone else has experimented with
noise reduction methods, including:
thicker windscreens
noise blocking/absorbing materials
vibration dampening mounting methods
cockpit ventilation ducting and intake positioning
intersection-induced noise sources
exhaust muffler systems
prop selection
Thanks!
Shaun Simpkins
shauns@hevanet.com
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