In Cockpit Noise - How to reduce?

[skippydiesel]

Just this morning a saw some interesting potential firewall insulation in SCA Aerospace

 

Aluminized Cool It Mat 24"X48" Noise & Heat Insulator

Details

https://www.supercheapauto.com.au/p/thermotec-aluminized-cool-it-mat-24x48-noise-and-heat-insulator/SPO5044178.html

$117.99

 

Aeroflow Heat Barrier - 20" X 12" Sheet, AF91-6000

Details

https://www.supercheapauto.com.au/p/aeroflow-20-x-12-aluminised-heat-barr/SPO3822703.html

$64.99

Car Builders Heat Shield - Light Face, Thermal Insulation, PS_HSL_L_x1

Details

https://www.supercheapauto.com.au/p/car-builders-peel-and-stick-heat-shield-light-face-600-x-1060mm/SPO7481118.html

$122.00

 

Most seem to be available in different sizes

[M61A1]

  skippydiesel said:

Just this morning a saw some interesting potential firewall insulation in SCA Aerospace

 

Aluminized Cool It Mat 24"X48" Noise & Heat Insulator

Details

https://www.supercheapauto.com.au/p/thermotec-aluminized-cool-it-mat-24x48-noise-and-heat-insulator/SPO5044178.html

$117.99

 

Aeroflow Heat Barrier - 20" X 12" Sheet, AF91-6000

Details

https://www.supercheapauto.com.au/p/aeroflow-20-x-12-aluminised-heat-barr/SPO3822703.html

$64.99

Car Builders Heat Shield - Light Face, Thermal Insulation, PS_HSL_L_x1

Details

https://www.supercheapauto.com.au/p/car-builders-peel-and-stick-heat-shield-light-face-600-x-1060mm/SPO7481118.html

$122.00

 

Most seem to be available in different sizes

In the aft fuselage I have used something similar. It's a very lightweight stickyback aluminium coated foam to help reduce drumming on the flat panels. i have used a lightweight fibreglass stuff quilted between some other stuff to do the cockpit as it's more flame resistant. It has made significant improvement.

I still get drumming from the horizontal stab and wings because I'm not de-riveting to install insulation and wind noise is still the loudest thing. I'd have to build a less draggy airframe to fix that.

[Geoff13]

Take your hearing aids out :)

 

But seriously I turn my hearing aids right down and use EQ1 Noise Cancelling Headset.

In my case it is a case of having enough noise to hear the engine.

I hope to hear a problem before the gauges can tell me that I have one.

[Kyle Communications]

Take up gliding

[kgwilson]

I insulated the entire fuselage including the firewall, top, sides & floor to the back of the baggage area behind me with that lightweight closed cell foam which has aluminium foil on one side. Of course I couldn't do anything about the bubble canopy other than good sealing. Then I put in some lightweight carpet & upholstery in the cockpit I got from Spotlight. I only have Rec Flying basic PNR headsets and don't have any problem with noise at all. I can hear the engine note and can detect any irregularity which is good. After a 3 hour flight I still feel fine. All I need is a pee.

[M61A1]

  Kyle Communications said:

Take up gliding

I refer you to post #25

[Kyle Communications]

Need one of these :)

[Kyle Communications]

Mick some gliders are even worse..we have a couple of self launching ones at YCAB....man are they angry bees

[facthunter]

Without an engine (in a glider), you can hear all the airframe noises. Creaks and groans and cables flapping. In the early Cessnas and Cherokees you had a speaker and hand held mike. They must have had adequate sound deadening then. Nev

[SSCBD]

  Kyle Communications said:

Take up gliding

Or turn the engine off.

I know airframe noise.

[Yenn]

Those old Cessnas which didn't have modern radio had sound deadening, maybe. I flew them for twenty years without headphones and now I have deafness. We could hear the loudspeaker OK, but I doubt I would hear it now and certainly wouldn't try.