Differentiate between Steel and Aluminum props (decor Question)

[itawad]

Hello

I'm looking into buying an out of service aluminum prop and finish into gloss finish for decor display. I have few offers to buy but need to check that I'm not buying a steel one (Lack of experience !).

ANy tips to know if its an aluminum rather than steel when buying?
I have Macqualy and sensenich metal props available to buy

THank you
Imad

 

[pbehn]

Hello

I'm looking into buying an out of service aluminum prop and finish into gloss finish for decor display. I have few offers to buy but need to check that I'm not buying a steel one (Lack of experience !).

ANy tips to know if its an aluminum rather than steel when buying?
I have Macqualy and sensenich metal props available to buy

THank you
Imad

A magnet?

 

[Wurger]

A note though .. trading isn't allowed on the forum even with or without the magnet.

 

[itawad]

A note though .. trading isn't allowed on the forum even with or without the magnet.

No trading. Just seeking feedback and opinions. Thank you

 

[MIflyer]

Read the manufacturer name and the model number on the prop and then research it.

 

[MiTasol]

If it is a Curtiss prop it is about 50/50 steel or alloy and a magnet will answer
If it is a very large Aeroprop it may be steel
If it is Rotol or Hoover it may be Jablo but mainly alloy
Virtually everything else is alloy or wood

 

[gumbyk]

Macauley or Sensenich will most likely be aluminium. I'm not aware that Sensenich have ever made a steel prop, but have a feeling the Macauley may have in the distant past.

But, yeah, go along and view with a magnet in hand.
Or use the model numbers to have a look at the FAA Type Certificate Data Sheet database if they're civilian props.

 

[Tom Fey]

Besise the magnet test, the WWII steel props are hollow, will "bong" instead of "tink" when you rap it hard with your knuckle.

 

[itawad]

Besise the magnet test, the WWII steel props are hollow, will "bong" instead of "tink" when you rap it hard with your knuckle.

great point, thank you