Rainwater Harvesting Model
A cross-section model showing rooftop collection, first-flush diversion, filtration and groundwater recharge.
- Suitable for
- School
- Technology
- Cross-section fabrication
Beginner4–6 days
Science Model · Physics & Mechanics
Hydraulic Bridge Model
A lifting bridge raised and lowered by water-filled syringes, demonstrating hydraulic force transmission.
- Difficulty
- Beginner
- Typical time
- 3–4 days
- Suitable for
- School
Price
Contact for price
Cost depends on components, complexity and which deliverables you need, so we quote after understanding your requirement.
Technologies
- Hydraulic force transmission
- Pascal's principle
- Mechanical linkage
Project overview
Paired syringes connected by tubing form a closed hydraulic circuit. Pressing the master syringe transmits pressure through the water and drives the slave syringe, which lifts the bridge deck. There is no electronics at all, which is exactly why it works so well for younger classes.
Because the fluid is effectively incompressible, force applied at one end appears at the other — Pascal's principle made visible. Using syringes of different diameters lets you demonstrate mechanical advantage: a larger slave cylinder lifts more with the same input force but moves a shorter distance.
It is reliable, it survives being carried, and there is nothing to fail on the day. For Class 6 to 8 it is one of the most dependable exhibition choices available.
Features
- Fully mechanical — no batteries or electronics to fail
- Smooth, repeatable lifting action
- Coloured fluid so the hydraulic path is visible
- Optional second syringe pair to demonstrate mechanical advantage
- Robust enough to be operated repeatedly by visitors
How it works
- 1The syringes and tubing are filled with coloured water and purged of air.
- 2Pushing the master syringe plunger raises the pressure in the closed circuit.
- 3Because the water cannot compress, the pressure appears at the slave syringe.
- 4The slave plunger extends and pushes the lifting arms attached to the bridge deck.
- 5Releasing the master plunger lets the deck's weight return the fluid and lower the bridge.
Components used
- Paired syringes with connecting tubing
- Hinged bridge deck with lifting arms
- Wooden or acrylic bridge structure
- Base board with roadway approaches
- Coloured water for visibility
- Printed labels
Questions about this project
Why does it have to be water and not air?
Air compresses, so a pneumatic version feels spongy and the lift lags the input. Water is effectively incompressible, which is the whole point of the demonstration — and a good question to be ready for.
What if air gets into the tubing?
The action becomes soft. Purging the air is a two-minute procedure and we show you how to do it, since it is the only maintenance this model needs.
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Need the Hydraulic Bridge Model in Surat?
Send your class or course and your submission date and we'll confirm what's achievable, what it includes and what it costs — before you commit.