Twin barrel Water Rocket Launcher
Posted: Mon Dec 01, 2014 9:48 pm
Twin barrel Water Rocket Launcher for advance water Rocket
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Does it fire both rockets at the same time so you can have a race to the top?mahboob wrote:Twin barrel Water Rocket Launcher for advance water Rocket
Oh I'd love to see that!mahboob wrote:Once a launcher I have made same like your design. and control with pneumatic control and air pressure control with FRL device. also use with DRO for reading flight simulation with my special designed radar system every rocket data like achieve hight, flight duration quickly on my computer screen I upload pics very soon.
We developed a system to allow the staggered launch of multiple rockets. We inverted our one-way valve in each launch tube and use a slow fill rate when pressurizing. The slow fill does not produce enough pressure differential to activate the one way valve, so the rockets all fill normally. When launched, the one way valve in each launch tube will activate and prevent the pressure from escaping through any launched rockets launch tube.bugwubber wrote:Gotta love the multi rocket launchers. My launcher releases them all at the same instant because they are all held in place by one steel bar that pivots out of the way. What is fascinating is how just changing the weight or amount of water has a large impact on acceleration as seen in below. For individual pull multi launchers, it is important to isolate the air line on each tube or a slight delay will vent all the pressure from one rocket. My launcher is normally left in the open position at each tube so there is no isolation but because they launch together, I rarely have problems with mislaunches. Those are normally caused by dirt getting in the rocket nozzle or launch tube.
Interesting, so installed that way, it doesn't prevent emergency venting. Would you fill water through the line too or just air?U.S. Water Rockets wrote:We developed a system to allow the staggered launch of multiple rockets. We inverted our one-way valve in each launch tube and use a slow fill rate when pressurizing. The slow fill does not produce enough pressure differential to activate the one way valve, so the rockets all fill normally. When launched, the one way valve in each launch tube will activate and prevent the pressure from escaping through any launched rockets launch tube.bugwubber wrote:Gotta love the multi rocket launchers. My launcher releases them all at the same instant because they are all held in place by one steel bar that pivots out of the way. What is fascinating is how just changing the weight or amount of water has a large impact on acceleration as seen in below. For individual pull multi launchers, it is important to isolate the air line on each tube or a slight delay will vent all the pressure from one rocket. My launcher is normally left in the open position at each tube so there is no isolation but because they launch together, I rarely have problems with mislaunches. Those are normally caused by dirt getting in the rocket nozzle or launch tube.
All of our 1-way valves have a USWR invention we call the "safety bypass bleed". It takes different forms depending on the design of the one way valve. The simplest form is one or more narrow grooves cut into the valve seat that prevents a 100% perfect seal. This allows the pressure to leak out slowly if the system must be depressurized for safety reasons. If the valve is part of a multiple stage rocket, the valve does leak but in the 5 or 10 seconds it needs to prevent air escaping during flight, the amount of pressure leaked is negligible. Well worth it to have the safety pressure drain feature it provides.bugwubber wrote:Interesting, so installed that way, it doesn't prevent emergency venting. Would you fill water through the line too or just air?U.S. Water Rockets wrote:We developed a system to allow the staggered launch of multiple rockets. We inverted our one-way valve in each launch tube and use a slow fill rate when pressurizing. The slow fill does not produce enough pressure differential to activate the one way valve, so the rockets all fill normally. When launched, the one way valve in each launch tube will activate and prevent the pressure from escaping through any launched rockets launch tube.bugwubber wrote:Gotta love the multi rocket launchers. My launcher releases them all at the same instant because they are all held in place by one steel bar that pivots out of the way. What is fascinating is how just changing the weight or amount of water has a large impact on acceleration as seen in below. For individual pull multi launchers, it is important to isolate the air line on each tube or a slight delay will vent all the pressure from one rocket. My launcher is normally left in the open position at each tube so there is no isolation but because they launch together, I rarely have problems with mislaunches. Those are normally caused by dirt getting in the rocket nozzle or launch tube.
RaketfuedRockets wrote:That looks cool!
You should definitely try to launch two water rockets nearly at the same time, so that one rocket can film the launch of the other rocket from the air.