Mounting a Spinner
Before you mount the spinner, you must ensure that the propeller(s) you
intend to use with it do not touch the cut-outs in the spinner. Contact
with the cut-out can cause catastrophic failure of the propeller and
possibly the spinner. Better manufacturers will cut your spinner
properly for the propeller for a small fee.
In my mind, it is worth it
for two reasons: First, it will probably be done right. They
have the equipment and the know-how. Second, it makes them liable if
you use the product properly and it fails due to a defect in the cut-out.
If you choose to make the cut-outs yourself, then try to keep them as
symmetrical as possible so that you do not take the spinner out of balance.
There are a lot of ways to make the cut-outs, but this page does not discuss
them. Seek assistance from an experienced modeler before you start
hacking away at your spinner.
After the cut-outs are properly made, you can mount the spinner and
propeller to the engine.
All two piece spinners have a separate back
plate that is held in place by the propeller and prop nut.
An adapter nut is used in addition to or
instead of the prop nut.
The bolt shown here holds the cone in place.
The spinner cone goes in place before the bolt though.
The spinner cone in place. Do not
over-tighten the cone retaining bolt. You can crack the spinner or stress it to
the point where it could crack in use sending shards of metal flying in