Why do some PB2Y Coronados have three and four blade propellers?

Can anyone comment on why this PB2Y Coronado would have both four and three bladed propellers? Was that normal for the Coronado, and other multi-engined planes? I’ve never seen a pic until now of it not flying.

Not to answer my own question, but here’s one with a little more symmetry.

…ooooh… there it goes changing props on me again.[:D]

Looks like an availablity issue and making due with what one has in the depot.

or…

It was a scheme to make the enemy think it was a different type of plane because of the sound

Nevermind. I found the answer. I guess I just like sharing learning experiences though. Follow the link below for the answer.

http://www.aerospaceweb.org/question/planes/q0039a.shtml

This is interesting, I remember a year or two back, FSM had an article from a fellow showing how to built vac form kits and he used Execuform’s Coronado kit for his article and gave it the two different types of prop.

As I recall, there was a short sidebar of the type’s history with the article and the explanation there was that the four blade props came into use on the Coronados that were converted to transports. I don’t recall exactly what it said, but I suppose if the transport variant needed a bit extra pull an extra blade on each wing might help.

Weird, but very interesting.

Karl

Wow, you do learn something new everyday in here. I would knew that the later cornado had two different set of blades on them. Tiger33

I visited the USNaval Aviation Museum in Pensacola several years ago and noticed the PB2Y with the different propellers. I was very puzzeled at the time as to the reason for this. The only I could think of at the time was that the museum people couldn’t find all matching props and put the 2 different types on it with the something was better than nothing. The explanation on the web site listed above does make a lot more sense.

Darwin, O.F. [alien]