| Author |
Message |
    
rendo
Member
Username: rendo
Post Number: 23
Registered: 08-2006
| | Posted on Saturday, December 13, 2008 - 04:36 pm: | 
|
Hi, I need an education on what is available to fit and actuate a reversing blade propeller. The engine has a little mount on which a lever is to go, but nothing else. Thanks. |
Steve Fox
Visitor
| | Posted on Friday, January 09, 2009 - 08:07 pm: |
|
This would depend on whether this is an inboard or outboard engine. Judging from your signature photo, I would assume this is an inboard unit. The inboard reversing prop is very old and dates from the steam era. I do not have this but I do have many Caille outboards which also have feathering props. Basically each propellor blade is mobile and independently mounted. Each prop blade has a cam where it mounts on the shaft. The cams are set to move each blade in opposite directions when a lever is pulled. In the inboard configuration a long rod goes inside the the prop shaft. When the driver moves the rod there is an activator (usually a small bronze pin inside the prop hub that turns one blade clockwise and the other blade counterclockwise (and back again). Depending how you move the shift rod you can go forward, reverse or neutral. It would be helpful to know how much of your unit has survived. |
searcher
Senior Member
Username: searcher
Post Number: 270
Registered: 10-2004
| | Posted on Friday, January 09, 2009 - 08:56 pm: |
|
Rendo, I meant to respond when you originally posted your query but I have been taking on every bit of work I can while work is available. The world of the self employed land use consultant like myself has changed dramatically in the past three months. I don't expect to see a repeat of the good times of the past 15 years in the remainder of my lifetime.
The attached engraving is one version of an inboard reversing propeller. Steve Fox explained the basic mechanism quite well. There were several iterations of this device available in the late 1800's to roughly 1915 period. The reversing propeller was inexpensive and trouble free in comparison to a reverse gear of the time but it generally was relegated to low speed engines.
 |
rendo
Member
Username: rendo
Post Number: 24
Registered: 08-2006
| | Posted on Monday, January 12, 2009 - 10:35 pm: |
|
Steve and Searcher, thanks a lot for the info. The photo is worth a thousand or more words as it illustrates what to do. Are there things commercially available to enable the use of an ancient feathering prop as depicted in the excellent illustration? Thanks again.
John |
dijo
Member
Username: dijo
Post Number: 6
Registered: 10-2005
| | Posted on Thursday, January 29, 2009 - 10:12 pm: |
|
Lozier reversing propeller has driven inner shaft. Translating outer shaft changes pitch.   }} |
dijo
Member
Username: dijo
Post Number: 7
Registered: 10-2005
| | Posted on Thursday, January 29, 2009 - 10:18 pm: |
|
Propeller of rendo has driven outer shaft, actuation by inner shaft.  Does anybody have something better than the scheme below? |
