outboard mounted inboard?

[billgillen]

I have heard that it is possible to mount an outboard inboard. Could anybody tell me if this is possible, and where I could find out more.

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[oldharry]

Not quite sure what you have heard, but a some designers incorprated an outboard well - basically a hole through the hull, htrough which the outboard leg passes, thus giving some of the advantages of an inboard engine. The main gains are that the engine is protected from knocks and the waves, as well as the light fingered brigade. Disadvantages are that such an installation takes up quite a lot of space in the typically smaller hulls they are fitted to, and unless care is taken to allow the engine to breath, the well can fill up with exhaust fumes and stop the engine! Fumes may also reach back into the cockpit - unpleasant and dangerous!

Retrofitting a well is sometimes possible, but care needs to be taken not to compromise the structural integrity of the hull.

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[snowleopard]

another problem is that it's often difficult or impossible to raise the engine so the prop stays in the water a better solution is to lift it out and put a plug in the hole to make the bottom flush.

sometimes wells place the engine alongside the hull rather than below, typically in trimarans. this doesn't work well as the prop pops out of the water if it's choppy.

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[Guest]

My Snapdragon 23 ..... I cut a hole through the after part of the cockpit hull and built a bulkhead in front to carry the engine. This also provided a watertight barrier to stop the cockpit filling.

The manoeuvrability was AMAZING ...... I made sure that I could have about 60-70 degrees side movement on the engine to allow thrusting ! Plus the rudder behind made it fantastic.

<hr width=100% size=1>Nigel ... and of course Yahoo groups :
http://groups.yahoo.com/group/gps-navigator/