Today's Message Index:
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1. 12:35 PM - Sensenich propellors (Fred Bauer Jr)
2. 03:09 PM - Re: Sensenich propellors (Johnny Johnson)
Message 1
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| Subject: | Sensenich propellors |
--> RV3-List message posted by: "Fred Bauer Jr" <fredbauerjr@cox.net>
On a recent post [JJ] describing an RV3 with a 160 HP Lycoming we notice that the
Sensenich propeller was a 69 dia X 83 pitch.
We do not see where Sensenich and Van's offers that combination propeller, the
RV3 propeller Van's recommends is the Sensenich 70 dia X 81 pitch.
If the 69X83 Sensenich is a cut down 74DM propeller or another cut down version
of the Sensenich
BE CAREFUL !!!!!!!!!!!!!
John Thorp, the T-18 designer, went through a very detailed and complete vibration
analysis
after several fatal accidents with his T-18 design which involved using the cut
down propellers.
His conclusion was that the cut down propellers will fail!
NOT IF,
THEY WILL FAIL
I have never had a propeller fail on me so I may not know what I am talking about
but I can read and I can understand what I have read.
Message 2
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| Subject: | Sensenich propellors |
--> RV3-List message posted by: "Johnny Johnson" <Johnny@wiktel.com>
It's the legal 70 x 81 cut off 1" and repitched 2", the work was done per
Sensenich guidelines by a prop shop in Boise, ID. 81" was not enough pitch,
and the engine was 150 hp then. 69 x 83 seems about right for 160 hp.
Thanks for pointing out about the perils--very real perils--of severely
repitched Piper/Cessna/et al props... that is a no-no of the most extreme
nature, it is true. I should have been more specific in the original post.
Johnny Johnson
-----Original Message-----
From: owner-rv3-list-server@matronics.com
[mailto:owner-rv3-list-server@matronics.com] On Behalf Of Fred Bauer Jr
Subject: RV3-List: Sensenich propellors
--> RV3-List message posted by: "Fred Bauer Jr" <fredbauerjr@cox.net>
On a recent post [JJ] describing an RV3 with a 160 HP Lycoming we notice
that the Sensenich propeller was a 69 dia X 83 pitch.
We do not see where Sensenich and Van's offers that combination propeller,
the RV3 propeller Van's recommends is the Sensenich 70 dia X 81 pitch.
If the 69X83 Sensenich is a cut down 74DM propeller or another cut down
version of the Sensenich
BE CAREFUL !!!!!!!!!!!!!
John Thorp, the T-18 designer, went through a very detailed and complete
vibration analysis
after several fatal accidents with his T-18 design which involved using the
cut down propellers.
His conclusion was that the cut down propellers will fail!
NOT IF,
THEY WILL FAIL
I have never had a propeller fail on me so I may not know what I am talking
about but I can read and I can understand what I have read.
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