Sound and heat insulation - Flight test update

Update June 16, 2012. I've managed a couple of flights since installing the sound insulation. The first flight was after some Bing carb adjustments and it seemed like the engine was running smoother. Later I realized it was the sound insulation, duh.

Just completed another flight and the Thermo-Tec Suppressor mat has reduced the engine and dual exhaust significantly.

Original post -----------------

I've been meaning to add a barrier under the cabin floor to deal with the noise and heat created by the dual exhaust on the Jabiru. Here is my solution, untested to date, waiting for the weather to clear.

Had some .016 aluminum sheet, 2'x4' (609mm x 1218 mm), used 2' as length and cut 2 pieces to match the fuselage bottom. Attached some Thermo-Tec Suppressor mat to the sheets of aluminum and then installed using stainless sheetmetal screws. The fiberglass wing root fairings held the outside edge and a few SS screws along the inside to keep in place.

The pilot side ready to be installed.

View from below, both panels installed.

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Comment by Jake Reyna on June 2, 2012 at 8:06am

Warren, I've been distracted by the honey do list and weather since adding the heat/sound panels. Hopefully get into the air this weekend and will post an update.

Comment by Warren L. Taylor on June 1, 2012 at 9:09pm

   Jake,that solution looks lite enough , Iis there a measureable noise reduction? and heat occulsion? if that is a good word.

Comment by Jake Reyna on May 23, 2012 at 12:35pm

Louie, I wasn't having any heat issues, but the combination seemed right under the cabin floor, problem was how to attach. This stuff is usually applied inside with the foil side up, sticky side down. Attaching to some thin aluminum seemed like a good solution underneath and using screws or nutplates makes it removable.

I'll wait to do some flying before applying on the inside cabin floor, but I would apply as designed, sticky side down and cover with carpet aft of the rudder pedals to the center spar. I do plan on using on the inside firewall.

Noise cancelling headsets take care of most of the noise, I don't want to add any more weight than necessary.

Still trying to keep it light and hope to keep it under 700 pounds empty :-)

Comment by Louis W. Ott on May 23, 2012 at 11:47am

Looks good to me, Jake, and should help a lot. Do you plan on using the same 0.016" Al and 'Cool It' material for the inside?

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