Re: rooster tail
Need to get all these forces balanced to make something like this work. that small nozzle is going to react quite a load from that water being shot up. In other words there will be a huge force directed 180 from the exiting water. In this diagram, there is nothing to react that force. It will most likely push the leading edge up out of the water.
You have many forces which would need to be balanced here:
1) Force of exiting water
2) Pressure at inlet
3) Force of the string
4) Drag on the exterior of the fixture
5) Drag on the interior of the fixture
6) Buoyancy (negligible)
Not that it can't be done, just that the dimensions need to be correct.
One thing to consider may be having the rooster nozzle off of a reduction tee to try to stabilize the flow. That is have maybe a 3 inch pipe reduce to 2 1/2 at the same location that the 3/4 or 1" nozzle comes out the top. Since the primary flow is so much larger, it may be easier to balance out the rooster flow.
Ok im really bored atm heres a diagram, im sure it would be much heavier than a tin can depending on how you made it, man i need to get out and try it myself haha!
12-24" of 3" Pvc, 3" to 1" pvc reducer 2" of 1" pvc, pvc 45 degree coupling, 6" of 1" pvc
If you make the thing big enough it you should be able to cut it down if need be. Anyone remember building potato cannons? It should funnel the water into the 3" section, compress the crap out of it then send it flying out the 1" end at high pressure.
*Note* Seems like tossing something out the back with boat already at speed would cause a major jerk on the string or whatever was attached to the can/tube. If it did grab and the string wasnt strong enough it could just break off :\
Need to get all these forces balanced to make something like this work. that small nozzle is going to react quite a load from that water being shot up. In other words there will be a huge force directed 180 from the exiting water. In this diagram, there is nothing to react that force. It will most likely push the leading edge up out of the water.
You have many forces which would need to be balanced here:
1) Force of exiting water
2) Pressure at inlet
3) Force of the string
4) Drag on the exterior of the fixture
5) Drag on the interior of the fixture
6) Buoyancy (negligible)
Not that it can't be done, just that the dimensions need to be correct.
One thing to consider may be having the rooster nozzle off of a reduction tee to try to stabilize the flow. That is have maybe a 3 inch pipe reduce to 2 1/2 at the same location that the 3/4 or 1" nozzle comes out the top. Since the primary flow is so much larger, it may be easier to balance out the rooster flow.
