Flopper stopper

[cagey]

Going to make a flopper stopper and I was planning on triangular bit of ply etc. Then I wondered if anyone had found another idea, searched the usual but nothing inspired me, perhaps someone here has a novel approach or has seen something worth giving a try.
Ta
K

 

[rotrax]

If a Jockstrap is a flopper stopper and a Bra is an upper decker wobble checker,

What is a punch drunk Japanese who's father has dysentry?








A slap happy Jap with a crap happy Pap!

Sorry-could not resist.................................................

 

[seaangler23]

I just made one out of a bit of 12mm hdpe, around 700mm Triangular with rounded corners and routed edges, plan is a bridle that I can attach easily so when not in use its just a flat piece of plastic that easily stowed, need to experiment with the weighting and make another

 

[macd]

Recent thread that might interest you, cagey: https://www.google.com/url?sa=t&rct...pper-Stopper&usg=AOvVaw0T0VURUS4gimaDMvHtvdHG

 

[Egbod]

I made a flopper stopper using a plastic chopping board with 50mm holes and strips of rubber acting as one way valves (held on with screws into strips of wood) It sank "flat" with a 4lb weight tied to all 4 corners. It sinks easily, the valves close quickly on the way up so it it effective for most of the up movement. I think a triangular flopper stopper wastes a lot of time tipping to sink and then flattening out again on the way up. I am currently has MK2 with smaller holes, but more of them to improve the efficiency.

 

[cagey]

Thanks everyone, searched for hints but didn’t see either of the google results.
Ta

 

[Phildorset]

Thanks everyone, searched for hints but didn’t see either of the google results.
Ta

Did you find this? It's prompted me to get in the shed and make one... convincing and easy to make

http://www.faymarine.com/Pauls Information Site/Flopper Stopper.htm

 

[vyv_cox]

Applying a bit of thought to how they work suggests that the length between the pivot and the opposite end determines how far the boat will roll on the downward stroke before it becomes effective again on the upward. So logically, this distance should be as short as possible, which in a single piece of ply or whatever conflicts with the requirement to have a reasonable surface area to be effective. One way to do this, although complex, is to have a number of parallel strips, something like a Venetian blind with the pivot along one edge of each. There is an American purpose made one that uses something like this design, prohibitively expensive of course. https://www.westmarine.com/buy/magm...500?pCode=490102&cm_sp=Onsite-Recs-_-DY-_-PDP but something similar could be made quite easily at far lower cost. It would also be more compact to stow.

 

[Elessar]

Going to make a flopper stopper and I was planning on triangular bit of ply etc. Then I wondered if anyone had found another idea, searched the usual but nothing inspired me, perhaps someone here has a novel approach or has seen something worth giving a try.
Ta
K

effectiveness improves hugely if you can increase the distance from the centreline.

This is how nordhavn do it. I used this system on a nordhavn quite a bit a while ago and it's effectiveness is astonishing. (not my video!)

edit - just found this one with someone using a jib pole clipped to a shroud.