How many swim noodles?

DAG

Yes, my balls tickled from that landing
Location
Charlotte, NC
@tor*p*do do you normally ride lakes? I personally feel it's better to have a sunk ski without foam that's not moving around the lake than something neutrally buoyant that's moving around underwater with the current. I feel divers will have a higher liklyhood for locating something thats not moving around. Floating at service level obviously the best solution but dont think it's likly with most small AM hulls. A retriever type system seems ideal.
 

bored&stroked

Urban redneck
Location
AZ
If foam didn't make sense, oem's wouldn't waste the money installing it from the factory. They do, so there is a reason. Foam the tray, shove pool noodles, whatever displaces water and the more the better your chances. Everything is a crap shoot in life.

That being said, comparing a totally unregulated ultralight aviation segment to jetskis is kinda comical, this coming from someone who went to A&P school, worked at the CAF, and has logged fixed and rotary wing hours flying.
 
Since we are all over the place here maybe we need to be more specific?
On a smaller hull like some AM you probably don't have enough space to add enough flotation to keep it above the water. And yes, even on a meticulously maintained and built ski things can and do go wrong.

On a full size ski like a Superjet, yes there is enough flotation to keep it on the surface and even with the stock foam they will stay above the water even with the hood off.
Here is an actual sinking test of a stock superjet and it stays on the surface.
 
My superjet sank wayyyyy quicker than that. It is however shortened with tray plugs and the tray has a decent leak in it. Landing upside down from failed back flip attempts is all it took
 
My superjet sank wayyyyy quicker than that. It is however shortened with tray plugs and the tray has a decent leak in it. Landing upside down from failed back flip attempts is all it took
Sounds reasonable. Judging by the video I think the only thing keeping it on the surface was dry factory foam in the tray.
 
Location
Stockton
Since we are all over the place here maybe we need to be more specific?
On a smaller hull like some AM you probably don't have enough space to add enough flotation to keep it above the water. And yes, even on a meticulously maintained and built ski things can and do go wrong.

On a full size ski like a Superjet, yes there is enough flotation to keep it on the surface and even with the stock foam they will stay above the water even with the hood off.
Here is an actual sinking test of a stock superjet and it stays on the surface.

At pismo a super jet went down, it was quick, tail up but only just at the sea surface level, it would disappear out of sight then reappear as the sea and wash went by. It went to the bottom in no time...

Even on my own aftermarket ski’s.. had almost sinking happen 3 times... was surprised how little water it took to start over coming my positive buoyancy
 

Big Kahuna

Administrator
Location
Tuscaloosa, AL
At pismo a super jet went down, it was quick, tail up but only just at the sea surface level, it would disappear out of sight then reappear as the sea and wash went by. It went to the bottom in no time...

Even on my own aftermarket ski’s.. had almost sinking happen 3 times... was surprised how little water it took to start over coming my positive buoyancy
Most likely that hulls foam was waterlogged really bad. I did a nose stab one day just effing around, was kinda frustrated. Ski was running bad, Had the hood off trying to see if it was an exhaust leak. Decided to do something really stupid. Like a Nose Stab!!!!!! It bobbed with no issues. But the hull was not waterlogged.
 
I sunk koes old superjet one time with only the plate showing. The boat cop towed me to shore. The ski was like a fishing lure and totally submerged but bobbed up when they stopped. I pulled it up on the rocks , got most of the water out and they towed me back to the ramp.
 

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Location
Stockton
Most likely that hulls foam was waterlogged really bad. I did a nose stab one day just effing around, was kinda frustrated. Ski was running bad, Had the hood off trying to see if it was an exhaust leak. Decided to do something really stupid. Like a Nose Stab!!!!!! It bobbed with no issues. But the hull was not waterlogged.

Yeah that’s good point, I bet your right...

The waves were about an 8 second interval apart and the ski was caught inside in the surf zone. It did bob some but kept getting washed over with white water, and incoming water, which made it worse and prolly made it look worse, plus I was neck deep in the surf trying to reach it, so terrible vantage point for me.....

That’s crazy you trying a stunt with no hood :)
 
Just a quick mention to add to my comment a while back. But when I was consulting the boat builder here whom was actually contracted to build many of the self righting coast guard boats around the world, Australia bought a few if I recall, he said that many if not most coast guard boats he had to work on for repair came with the sub-deck jam packed with pool noodles sealed in bags. His statement was that they are very buoyant if you can keep them dry. He also said if the proof is in the hulls he's had to work on, they must be that good for buoyancy otherwise why would the coast guard boats be filled with them? So there is that :)
 
Oh and not sure about in the U.S. or outside of where I live but we do have strict air regulations on ultralight aircraft. A friend of mine used to be a pilot for them and was considered one of Canada's premier builders for them. Not allowed to fly lower than 1000 feet near cities or populated areas, still need air space clearance if flying near an actual aerodrome, motors are not supposed to be modified and BRP seems to be the only ones making them in I think 503 and 570cc sizes. Don't hold me to this knowledge but it's what I seem to recall from when he was in it unless there has been a lot of changes since then or just a lot more than I realized. But that was the extent of my experience with it back in 2010ish
 
Were they literally pool noodles? Or at least noodle shape of pieces of foam? That is surprising to me I would have guessed that they'd use some other shape that more tightly fills the space. Kind of interesting if they do. I guess they have the advantage that they can be relatively easily removed if needed, and if they're in bags then all of the airspaces between noodles are kind of sealed off so they still provide floatation. , basically the bag and the air in the bag is really the floatation device, the pool noodle is just to keep it in shape and I guess it provides a secondary floatation if the bag is damaged.

Interesting idea.

The wise ass in me wants to say something like "I guess the coast guard has poop mechanics" but maybe there has been too much of that here.
 
He said regular ol pool noodles in sealed bags. He's a boat design engineer, he came up with the self righting coast guard and fire fighter boats currently in use all around the world. Who am I to discredit that? :)
 
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