My wing warrior eZipper is pretty quiet most of the time, but when I fly full throttle it gets kind of noisy. I have heard that if you move the motor further away from the back of the wing the noise is reduced.
However, I can't move the motor further back than it is because my wing is already a bit tail heavy, so can I cut out some of the foam that is behind the prop to lessen the noise. Thanks.

Yes, that does help. I cut out a half-circle, about 4" wide on either side of the motor mount on my zagnutz and it reduced the noise dramatically.

Thanks for confirming my idea. I am going to try it as soon as my battery charges.

I did the same cut out on my Zagi. Made a big difference.

My charger lost the race against the sun.
But I made the cut outs and did some bench tests. The noise has significantly decreased.

I would be interested in seeing a photo if you have one handy.

Thanks

Here are some pics.

Cool idea. D Zipper, are the prop savers holding under all those RPM's??

Yes, the prop saver works great.
My dad had the same motor and the prop got caught in the grass when landing. The bell of the motor was bent slightly, so now I use a prop saver. I have only had the rubberbands break once after a rather hard landing.

I managed to do a flight test at lunch time.
The plane, which I used to be able to hear quite loudly 200 ft away, now is almost inaudible doing WOT 200 ft away. This experiment is a complete success.

Thanks for the photo. I can clearly see what I have to do to my zagnutz.

dont forget to put fiber back over where you cut , i trimed mine (cuth through the fiber tape) and it split about 3 inches during a crash.

No problem DOM.

Tgmtgm I didn't have any fiber tape in that particular spot and have crashed often so I think I'll be fine.

Is this setup quieter than a tractor setup?

Jay

It's about as quite as my slowstick with a gearbox, and that's the only tractor I have.