Float pods , hinged

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richg99
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Float pods , hinged

Post by richg99 »

As far as set back and prop height, the rule around here is for every two inches of setback, you can raise the engine one inch.
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Sparky508
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Float pods , hinged

Post by Sparky508 »

richg99 wrote:
10 Nov 2019, 17:34
As far as set back and prop height, the rule around here is for every two inches of setback, you can raise the engine one inch.
So if I'm already low, I can go up a country mile right?

Sparky508
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Float pods , hinged

Post by Sparky508 »

So my first attempt to deal with this is going be that gutter foam filter stuff. It would squish between the pod and boat when the gap closes.
gutterstuff-gutter-guards-strainers-gs-k5-span-64_1000.jpg
I reckon it will arrest the splash, but I wonder, will it have any affect on the drag? Its porosity would allow it to catch water I guess, but enough to hurt, or not enough so as it would help???

Looking at the video, it appears to be mostly coming from the outside edge, and spraying up, between transom and back of the pod.

I suppose that a shield of sorts on the side would perhaps work, but would need to be pretty tight to the hull, lest or it would get ripped off pretty quickly.

This is gonna drive me nuts!
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Churak
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Float pods , hinged

Post by Churak »

Evening Sparky, have loved following this thread and watching the project progress so far!

I had a few minutes to rough mockkup what you've got so far with some added artistic liberty (hope you like green and orange metal flake paint :lol:) in the spirit of just throwing ideas and burning time towards resolving the splashing issue. I saw mentioned already a side skirt for the pod which I think would be the way to go, and seeing as though you're not too afraid of some light fabrication I figured I would doodle some stuff up.

I think you can make use of your existing hinge mount point and the actuator mount point to create a structure that won't tear off, and build off of that.

Not everything is captured in the little model below, but I find it's helpful to explain my own garbled intent through pictures rather than words. The skirts would pull into the side of the pods and use that for support so they don't collapse inward and the bottom of the skirt extends down into the water a bit. Making the bit that sits vertical in the water stable enough is probably going to be a matter of the material thickness of the skirts without some clever reinforcement. Some unintended benefit might include better tracking and handling of the boat, heh. Hope this provides at least a conversation starter, looking forward to seeing how you move forward!
PodAssy-SideView.PNG
PodAssy-SideView_wSkirt.PNG
PodAssy-BotView_wSkirt.PNG
PodAssy-TopView_wSkirt.PNG
section-view.PNG
PodAssy-IsolatedSkirt.PNG
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Current Build Project [2019-2020]: '83 Lund WS16 Rebuild

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richg99
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Float pods , hinged

Post by richg99 »

Those drawings certainly look like that approach should work.
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LDUBS
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Float pods , hinged

Post by LDUBS »

richg99 wrote:
12 Nov 2019, 23:02
Those drawings certainly look like that approach should work.
X2. And, if I understand, the "skirts" would use the same fasteners that hold the hinges to the hull, so no need for any additional holes.

I wonder if you could get a rough test (with emphasis on rough) of the concept by clamping a piece of angle or something to the transom that extended down to just the outboard bottom side of the pod.
Have Rod - Will Fish

Sparky508
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Float pods , hinged

Post by Sparky508 »

Churak wrote:
12 Nov 2019, 22:45
Evening Sparky, have loved following this thread and watching the project progress so far!
Thank you sir!

That is a brilliant solution, I think I may have those materials, or enough around to crank that up!!

Sparky508
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Float pods , hinged

Post by Sparky508 »

I got to test the pods finally with a little power!

At about 1/2 throttle, when pods are level vs up, I gain 2-4 mph, haven't been able to really test at WOT yet..... I do get a bit of spray still from the gap in between the transom and gap in the pods, despite being sandwiched with foam. I'll worry about that later. (Prop ventilation, need some adjustments to motor, maybe more set back)
20200424_192417.jpg
Hopefully not caused by the pods as it would seem they would funnel water to the prop? Perhaps to turbulent to help though? Did seem to decrease slightly as they were lowered, but not enough to make a definitive conclusion. Hard to tell yet any gain or loss from level vs raised. Need to get that ventilation problem fixed first. (Always has to be something!)

They are really helpful with keeping the front mounted trolling motor buried in the water when wakes from other boats come around or when I'm flailing around in the boat! Can get the stern up pretty good when I put them down a bit beyond level. Pods completely submerged. When launching, boat floats up off of the trailer very early on the ramp, wich is nice.
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richg99
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Float pods , hinged

Post by richg99 »

Sounds great. Keep experimenting and post the results
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eeshaw
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Float pods , hinged

Post by eeshaw »

I'll give you my take on this. The reason you're gaining mph with the pods level is because you've increased the planing area. You're getting spray because the void between the pod and transom is creating a low pressure area. It can syphon water and expel it along the edge with the least resistance. Usually when pods are attached to the transom they are kicked up so that when the bottom of the hull is level they are "kicked up" about 3/4 of an inch to an inch for every foot of length. So if they're 18 inches long the tip at the end farthest from the transom should be about 1 and 1/8 inches to 1 and 1/2 inches. Are they set so they are level side to side with the sides of the transom? They should also be raised up some from the bottom of the hull also when installed. This will help with the hull trying to squat on takeoff.

Sparky508
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Float pods , hinged

Post by Sparky508 »

Equal with the sides, little bit lower then I'd like, flush with the hull. Going to re.edy the height by putting a uhmw wedge behind the angle. That should raise them a bit.