Best Prop?

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henry_koering
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Best Prop?

Post by henry_koering »

Hello, This is Henry I own a 1946 7ac with a cont 0-200.
I was wondering what the best climb prop would be?
I currently am using a 74in with a 44 pitch.
any suggestions would help, thanks.
WWhunter
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Re: Best Prop?

Post by WWhunter »

Henry,
Not sure what STC your engine has been installed with, but if it is with the Wagner STC, it lists the eligible props on the STC. My Champ has an O-235 and I think the prop is a 42 pitch. I may be wrong though since I am not near it to look in the logs. It was build specifically for float flying so it is not the speedeist Champ in the air. LOL
WW
MikeB
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Re: Best Prop?

Post by MikeB »

Henry,
If you have a Buzz Wagner STC, there are no approved props that long, although I'm sure it might work just fine. The usual prop for climb is a McCauley 69x48 and 69 x50 for cruise. I always felt a longer prop would work better, like 74 x43 but wasn't approved under the spirit of the STC. Kind of funny a page or so after he lists the approved props for the STC he has the statement " A customer reports that in using the 0200 on his seaplane, the seaplane prop used on a Cessna 150/G worked well. It was a McCauley 1A90/CF 75" long and the pitch was adjusted to run 2700 redline and 25/2600 rpm static". Go figure :wink: .

MikeB
henry_koering
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Re: Best Prop?

Post by henry_koering »

Thanks for everyone for your suggestions it seems I just have to find the prop that works best. I have a static rpm of 2300 right now so I know I need to go with a flatter prop.
If anyone has a prop that is 74 inches long with about a 40 pitch please let me know.
Plus I wanted to put a picture on here but could not figure it out. Any suggestions?
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joea
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Re: Best Prop?

Post by joea »

henry_koering wrote: Plus I wanted to put a picture on here but could not figure it out. Any suggestions?
Henry,

Look here for photo posting.

http://www.joea.com/phpBB2/viewtopic.php?f=1&t=1800

Joe A
akchamp
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Re: Best Prop?

Post by akchamp »

Henry, I have a McCauley CM 71/42 on my Champ that might work better for yours. Maybe we could work out a trade.
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Holcombe
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Re: Best Prop?

Post by Holcombe »

50 rpm per inch of pitch changed.
Prop shop can do about anything you want, and you get it back looking brand new with fresh paint.
Tail winds are a "Good Thing"
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