Problem Statement:
A model rocket company contracted your team to design a new rocket model to achieve a maximum altitude using parts available within the company’s product portfolio.
Constraints:
- Altitude: maximize
- Body
- Body tube length: between 7 and 18 inches inclusive
- Outer diameter: 0.976 in.
- Inner diameter: 0.950 in.
- Wall thickness: 0.013 in.
- Component Material: Printer paper (0.474 oz/in.3)
- Component finish: Polished (0.079 mil)
- Inner tube
- Outer diameter: 0.748 in.
- Inner diameter: 0.709 in.
- Wall thickness: 0.02 in.
- Length: 2.756 in.
- Component Material: Cardboard (0.393 oz/in3)
- Engine hook: as shown in the template
- Centering Ring 1
- Outer diameter: 0.938 in.
- Inner diameter: 0.748 in.
- Thickness: 0.25 in.
- Bottom of the parent component: –0.625 in.
- Component Material: Cardboard (0.393 oz/in.3)
- Centering Ring 2
- Outer diameter: 0.938 in.
- Inner diameter: 0.748 in.
- Thickness: 0.25 in.
- Top of the parent component: +0.625 in.
- Component Material: Cardboard (0.393 oz/in.3)
- Parachute
- Canopy
- Diameter: 12 in.
- Material: Polyethylene (heavy) (0.131 oz/ft2)
- Position relative to: Top of the parent component
- Plus: 1.26 in.
- Packed length: 1.654 in.
- Packed diameter: 0.709 in.
- Shroud lines
- Number of lines: 6
- Line length: 12 in.
- Material: Thread (heavy duty) (0.003 oz/ft)
- Canopy
- Shock Cord
- Shock Cord length: 18.000 in.
- Shock cord material: Elastic cord (flat 12 mm, 1/2 in.) (0.086 oz/ft)
- Position relative to: Top of the parent component
- Plus: 0.787 in.
- Packed length: 2.047 in.
- Packed diameter: 0.472 in.
- Fins
- Trapezoidal or Elliptical: All choices available
- Component material: Balsa PLTW 3/32" (0.062 oz/in.3). Enter into OpenRocket as a Custom Material and save to the OpenRocket database.
- Thickness: 0.094 in. (3/32 in.)
- Component finish: Polished (0.079 mil)
- Trapezoidal or Elliptical: All choices available
- Motors & Configuration
- C6-5 for design to ensure stability for all engine sizes
- B6-4 and A8-3 for final design
- Nose Cone
- Use sizes A through E.
Final Simulations:
Side View:
3D View
Picture of Finished Rocket:
Testing My Rocket:
Finding the center of gravity on my rocket went as follows:
- Tie a slip loop on the end of 10 feet of string.
- Place the rocket into the loop.
- Slide the loop along the rocket until it remains balanced with no support other than the string.
- Mark this rocket center point with a Center of Gravity (“CG”) label.
Estimation:
My estimate is that my rocket in the real world will not reach the height listed in the computer simulation. i say this because, the simulation doesn't take into account things like; air pressure, air density, temperature, amount of glue holding rocket components together,
Data Plot of Rocket With "A" Engine:
Things I need
- tests for stability
- What my experience was like
- how well i expect the rocket to perform in comparison with simulation