I have often thought why don’t they put dual props onstraight inboards. It would seem as though the craft would be more efficientwith them The pocket drives on Sea Ray would seem to be a perfect candidate the thought is it would work almost a like a jet jet drive.
Navigation
Install the app
How to install the app on iOS
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature currently requires accessing the site using the built-in Safari browser.
More options
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
Dual props
- Thread starter DougLas
- Start date
I have often thought why don’t they put dual props onstraight inboards. It would seem as though the craft would be more efficientwith them The pocket drives on Sea Ray would seem to be a perfect candidate the thought is it would work almost a like a jet jet drive.
David Paul
New Member
Dual props require a shaft within a shaft. It is one thing to accomplish this on a shaft that is short as an outdrive but I doubt it would be easy to do this on a shaft that is several feet long that you find on an inboard.
Lord Farringdon
New Member
- Feb 19, 2010
- 515
- Boat Info
- 2005 Sea Ray AJ, Raymarine C80.
- Engines
- 285 HP, DP-G Duo Prop Stern Drive
Dual props require a shaft within a shaft. It is one thing to accomplish this on a shaft that is short as an outdrive but I doubt it would be easy to do this on a shaft that is several feet long that you find on an inboard.
And they are contra rotating which adds a gearing complexity to the issue. In some ways the question 'let's put duo props on a shaft drive' has already been asked and answered by the leading manufacturers. 'We will have to shorten the drive shaft...and add a gearbox...." They call it IPS and Zeus.
Terry