cover plate, or not?

[jgerard]

When using a metal prop on a tapered flange crank with prop hub, should you use the metal front cover plate that is ALWAYS used with a wood prop? or just washers under the prop bolt nuts and no plate. I was told that using the cover plate would cause corrosion on the prop.

Jason
N43643

[Acroeric]

Re: cover plate, or not?

Jason- the plate you are speaking of is called a crush plate- it is used to distribute the compression load evenly on the wood props. It is not needed on the metal props- the bolt and washer works fine.

[crispy critter]

Re: cover plate, or not?

Jason,
Eric and your other source are both correct.The crush plate against the aluminum prop will hold moisture and cause corrosion between the two surfaces.

[jgerard]

Re: cover plate, or not?

thanks for confirming the info boys!!

Jason
N43643