Design Problem: Pressure Rocket + Bike Pump

  • Thread starter Thread starter bskramer
  • Start date Start date
  • Tags Tags
    Design
AI Thread Summary
The discussion centers on designing a pressure rocket using a 2-liter Coke bottle, water, and a bike pump. The creator faces a challenge with the rubber stopper, which dislodges at around 1.5 atm pressure. Suggestions are sought for a reliable release mechanism to safely manage pressure without losing the stopper. A link to a relevant resource is provided for additional guidance. Effective solutions could enhance the rocket's performance and safety.
bskramer
Messages
8
Reaction score
0
im working on a simple pressure rocket for fun, and am running into a problem. my basic design is using a 2 liter coke bottle partially filled with water and pressurizing it by using a rubber stopper with a tire valve in it and pumping it with a bike pump. The problem is that i can only get about 1.5 atm in the bottle before the stopper flys off. if someone could suggest a way to make a release mechanism I would be very appreciative.
 
Engineering news on Phys.org

Thread 'Query on Isentropic relationships (such as PV^gamma = constant)'

Hi all, I have a question. So from the derivation of the Isentropic process relationship PV^gamma = constant, there is a step dW = PdV, which can only be said for quasi-equilibrium (or reversible) processes. As such I believe PV^gamma = constant (and the family of equations) should not be applicable to just adiabatic processes? Ie, it should be applicable only for adiabatic + reversible = isentropic processes? However, I've seen couple of online notes/books, and...
View full post »

Thread 'Dry sump pump issue'

I have an engine that uses a dry sump oiling system. The oil collection pan has three AN fittings to use for scavenging. Two of the fittings are approximately on the same level, the third is about 1/2 to 3/4 inch higher than the other two. The system ran for years with no problem using a three stage pump (one pressure and two scavenge stages). The two scavenge stages were connected at times to any two of the three AN fittings on the tank. Recently I tried an upgrade to a four stage pump...
View full post »

Similar threads

In Search of: Cheap/common pressure switch
Replies
17
Views
3K
High school project -- Finding mass flow rate, air velocity
Replies
18
Views
3K
Pump Head & Suction (leaky closed system) PF Newbie
Replies
4
Views
2K
Siphon problem with above ground water tank/pump
Replies
4
Views
2K
Solving the Problem of Capillary Action in Tiny Peristaltic Pumps
Replies
9
Views
2K
Can a Glass Pressure Vessel Demonstrate Crush Depth with a Bike Pump?
Replies
6
Views
2K
Column of water, vacuum pressure and a one-way valve problem
Replies
5
Views
8K
High capacity pneumatic positive displacement pump
Replies
8
Views
4K
Calculating output from an air displacement pump
Replies
2
Views
6K
Calculating Pressure Threshold for Passive Solar Pressure Pump Design
Replies
1
Views
3K

Hot Threads

Recent Insights

Back
Top