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I have the materials and am ready to begin the installation process; I've read the instructions. Seems pretty straightforward, do any of you guys who've done it have any "pearls of wisdom" for installing Sound Down on my engine boxes? Searched the sandbox and found plenty of info about what to use, little discussion about the process. Any advice will be greatly appreciated. Thanks!

I epoxied the nail things to the engine boxes in whatever spacing Soundown advised. As I remember, you push the Soundownl over the nail things, then the retainers over the nail things. You then cut off the ends of the nail things and push the round caps over the nail things. My tip--be careful when you cut the ends off the nail things, so that you cut them to the right length. I you leave them to long, the nail things will poke right through the round protecter caps, defeating the purpose of the caps, and will go right into your hand if you're aren't paying attention during the install. Not that this happened to me or anything...

John F. wrote: I you leave them to long, the nail things will poke right through the round protecter caps, defeating the purpose of the caps, and will go right into your hand if you're aren't paying attention during the install. Not that this happened to me or anything...

LOL...pearls of wisdom right there!

If in doubt whether you have enough nail things to hold overhead panels...add two more for every one your not sure of.
Aside from that, watch out about leaving gaps in insulation...even the smallest openings allow lots of noise to spill out.

I didn't have epoxy on hand when I did mine, but I did have poly resin and fiberglass. from the re-build.

I cut squares of 1708 (probably 4-5" on a side), stuck the nail thing through and positioned them in place.

I then went to each one with a chip brush and wetout the glass. I do not think I will have any issues with them coming loose.

Of course, proper surface preperation is a must.

Ian.

Because of my language barrier it is easier for me to show in a drawing what I saw in one of Puerto Rico's 31's.



As you may appreciate, the Sound Down material rests on grooves made under the engine box out of fiberglass and a 2 inches wide piece of aluminum in the center if it sags.

Thanks for the tips, I'll report on how it went.