Prop SAE type?

[Mynor M B]

hello every body, can any one explain me the difference between the SAE type 1 and the SAE type 2 wood propellers for Lycoming O-235 engine? I'm in the process of looking for a propeller and even if have a document that tells me that my O-235-C2C require a SAE type 1 hub propeller, I will like to know if there is some other difference besides the 4 3/8(type 1) and 4 3/4(type 2) inches bolt cyrcle.

Thanks.

[rpellicciotti]

As you have already discovered, there are two sizes for prop flanges. SAE 1 is used for smaller engines like O-200's and SAE 2 is used for larger engines like a O-320 or O-360. The larger flange is stronger and therefor able to handle larger loads imposed by a larger prop needed for higher power.

 

Your O-235 is different. Lycoming offered the O-235 with either prop flange. So, if you were an operator that had been running O-200 powered aircraft (SAE 1) and you wanted to be able to have interchangable props, you could do it. Cessna 150 to 152 transition for example. Other O-235's were built with SAE 2 flanges that were the same as all other Lycoming engines.

 

So, when you go to order a prop for your O-235, the prop maker needs to know which hub your particular engine has since it could be either one. Otherwise, there is really no operational difference.

[Mynor M B]

Thanks for your answer RPILLIOCCIOTTI, that clear it up for me, so in my particular case, I need a SAE 1 flange propeller. Do you know which are the propeller brands approved for my airplane and engine? cause I have found taht sensenich have the W64HKL-68 but it exceed the 58 inches diameter recomended by Rutan, and the manufactures recomended originally by Rutan, are hard to locate, So I will like to know if you know which TWO BLADE WOOD PROP can I buy for my O-235-C2C Eng Long-EZ?. Once again tanks for your help.

Regards.