Hi there. I was reading about noise reduction. I thought I could
help with this idea for noise reduction problems people might
1. First thing you have to do is but a cheap squirty tube of silicone
sealant from B&Q.
Right now you need a flat surface e.g. the glass from a picture
frame is ideal. Cut up a plastic bag so it covers the glass with
an inch spare all round so that you can tape the bag to the glass
with NO wrinkles this will prevent the silicone from sticking
to the glass.
Then get your engine mount an apply a nice thick layer of silicone
on the back and place on the plastic bag. ( Be very careful not
to press to hard an squeeze out all the silicone)
Get some more glass and coat it in plastic bag now squirt more
silicone into the centre of the glass so you get one big blob
in the middle, place 2 pieces of 3 mil balsa strip at each side
of the glass then push another piece of plastic covered glass
onto the silicone until you meet the 3 mil balsa strip so you
get a uniform sheet of 3 mil thick silicone.
Go to bed an come back next day! by this time it will be dry.
Now peel off the sticky tape holding the plastic to the glass
on the motor mount and silicone sheet and trim the plastic though
the edge of the motor mount and silicone sheet. Now with the engine
mount drill out the silicone where the bolt passes through. With
the silicone sheet you have to cut loads of washers. To help make
the wasters use an old TX aerial tube sharpened at one end to
cut the centre of the washer.
Now assemble the engine mount onto the airframe placing three
silicone washers at the head end and three washers at the bolt
end of all 4 bolts holding the engine mount to the model when
tightening the bolts be careful not to over tighten the bolts!
method should combined with large diameter and fine pitch of smaller
diameter coarser pitch props should significantly reduce noise,
and if you are on a tight budget like me its much cheaper that
buying rubber grommets for your motor mount or fancy motor mounts
with rubber bits on because you can noise proof many many models
for roughly 3 quid! I hope this helps.
If this method works for any one in your club or you decide to
incorporate it in your web page please contact me on FlyinPhilj@aol.com
All the best
Manx Model Flyers