Installing a MT Prop on the RV-10.

[Phil]

I know this is simple and I'm making it way more complex than I should, but I'd like to get some other opinions before I do something dumb.

I have the standard MT prop that Vans sells for the IO-540 and one of two things are going on.

1) The installation documentation isn't that detailed; or
2) It's very detailed and I just can't read German well enough to tell.

On my engine, I have 4 male lugs and 2 female lugs. On my prop, I have 5 female lugs and 1 male lug.

I get the whole concept the male/female and proper clocking of the prop.

In the case of these two photos, the lug at 9 o'clock position would have an air gap around the bolt because the engine lug is female and so is the prop hub. It seems to me that I should have a male lug on the engine to fit into that recess on the prop hub.

1) Is that normal?

2) Best I can tell from the documentation, these should be torqued 63-66 ft/lbs. Is that also right?


Thanks,
Phil

Here's a photo of the engine:

 

[9GT]

You can clock the blades 180*. We had to do this on the Cozy MKIV we built to help reduce exhaust soot build up on the blades which had a 3 blade MT.

 

[Phil]

That's what I was thinking. So I guess the air gap is acceptable.

63-66 ft/lbs..... Anyone?

 

[Bill.Peyton]

I would not assume the gap is acceptable. I believe that you can purchase bushings to install over the studs. I would check with the propeller mfg. or Lycoming first.....