Ok--Here goes--These are both Bee readys and Driftmasters--Also have extra bases for both so I can move them around if conditions call for that, and both move easily.The bee ready transport rod holders in the right of the pic are great, really like them.
I am about to buy a couple of used 24 feet long aluminium pontoon boats at a great price and I thought of modifying one of them. I was thinking of designing a central log, big enough to accommodate the diesel engine (a 3-4 cylinder 50-60 hp). Can you say if the presence of the other two logs will influence the prop performance by pushing air underneath the central log? Location: Milwaukee, WI Simple as possible would be the motor in a well that doesn't touch the water and a long enough shaft held by a V strut and the aft end. I was thinking about that but I am not sure that is going to work as the diesel engine is twice as heavy as the gas one and there will be float-ability problems plus the prop is not protected.
I forgot to mention that the boat will travel most of the time at max capacity 12-15 persons so the central log will be needed to compensate the weight of the engine. Location: Milwaukee, WI You don't want the simple, low maintenance options and call them fantasies. Location: NW Washington State USA I'd consider shaping the aft end of the ctr hull a bit like the 1st photo and a bit like an axe bow.
Originally Posted by Easy Rider I'd consider shaping the aft end of the ctr hull a bit like the 1st photo and a bit like an axe bow. I thought about this too just like a submarine propulsion but I am not sure if the prop being so close to the surface will ventilated and cavitation will be bad.
The tunnel Gonzo suggested is not a bad idea and actually the Rescue Minor its a tunnel prop design.

Originally Posted by gonzo With a tunnel, the shaft can be almost horizontal Do you have any example of such tunnel on such a narrow hull? Location: Milwaukee, WI The tunnel is the same dimension regardless of the hull.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Spending extended periods of time on our lakes and rivers without spending a fortune is now possible with the HRV (Hybrid Recreational Vessel) Liberty. Following the trend in the living room furniture, the latest fashion in pontoon furniture design is modular. Quite as the Majesty and the Mistral, it could be equipped with a removable front seating module to complete a full "U" shaped seating area. Very reasonably priced, the Horizon is a good choice for the average budget and comes with basic equipment. The platform of the commercial pontoon boat enables the user to install almost any kind of equipment that we find on other types of boats.
We need the kind to mount on the rail, so my bro can get his guide service started he's got everything and almost done getting all the legal stuff the rod holders is all we lack.
The idea is to fit it with a diesel inboard and a normal shaft but keep the low draft of the sterndrive or outboard engine. Shape of the log - and here I was thinking of designing a log somehow looking like the Rescue Minor boat - I found a smaller model here - How to design an outboard on an Atkin Seabright Skiff??? Position of the log - I thought of moving the log further back exceeding the transom but the question is how does a shorter log influence the general handling of the pontoon?

What would be the max prop size for such design considering the shallow draft of the pontoon?
The HRV is a unique new concept developed by Southland a Canadian manufacturer of high quality pontoon boats.
This pontoon boat has been designed with very high standards featuring meticulously chosen furniture. She's the indisputable motive to setting foot in the comforting charms of our pontoon boats with no worry about their price.
It is built with premium-quality materials and is backed by Southland’s long-standing renown for high quality workmanship.
Freed form its sun shade, relying on its 24” diameter tubes and equipped with a back exit along with two 24" access hatches. Cut off the high and low ends of the pinch to make a narrow horizontal surface top and bottom.
Choose a prop dia and run the shaft log through the pinch as low as possible (probably a bit below center) w acceptable prop clearance to a shoe attached to the bottom of the pinch filling the hole and reinforce this area. Vivamus vehicula, dolor ut aliquam tincidunt, ipsum sem scelerisque arcu, ut porttitor lectus dolor nec ligula.

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