This post is another in the 'Knowledge Base' series. The intent is to create an index to useful posts which would be of general interest.
Please share any useful links from other Forum posts on this thread, or write a post to cover a particular topic.
- Engine selection, transmission gearing, propeller selection and shaft layout diagrams are covered in great detail in Glen-L's book : Inboard Motor Installations by Glen L. Witt & Ken Hankinson
- Chapter 11 - Shaft angles & layouts is available online :
Inboard Motor Installation Chapter 11 : Shaft Angles & Layouts (WebLetter 12)
- Dave Lott has taken the time to document the shaft layout and shaft hole boring process :
Riviera Shaft Hole Boring by Dave Lott, Glen-L Riviera builder (MS Word document)
The following screenshot is a digital version of Dave's shaft layout method. We've expanded the spreadsheet to compute shaft angles for four engine displacements and two strut drops for each engine. It looks rather confusing but it saves having to rerun the spreadsheet with other data.
The first table contains engine dimensions and shaft layout data from scaled shaft layout diagrams. The four engines are installed at the same shaft angle. The second table calculates the shaft angles for each engine installed at a fixed distance from the transom.
If you're trying to install an engine in a tight space and wish to minimize the shaft angle, scan the Shaft Angle column to find the best fit. In this example, a flywheel-forward installation is the best fit. It's followed by the 4.3 V6. The other angles are too steep if your goal is to stay below the 15 degree maximum. Stretching the hull and running the numbers again will flatten out the shaft angle.
Here's a direct link to the shaft layout section : Shaft Angles & Layouts - Drilling the Shaft Hole
Kane Custom Boats Ltd.
Building the Glen-L Hot Rod : http://www.kanecustomboats.com
Glen-L Hot Rod build thread
Kane Custom Boats YouTube channel
Glen-L Boat Video Directory
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