This is a to scale drawing of the cross section of our rocket. As we've said before our rocket has 3 fins, even though only 2 are pictured in the cross-sectional drawing. Around the middle of the body is the center of pressure, the point that the drag force is applied.
ROCKET PART AREA, A (CM^2) HEIGHT FROM THE Axh
BOTTOM OF THE ROCKET
TO THE MIDDLE OF EACH
SHAPE, h (CM)
Nose Cone 8.7 23.3 204.0
Body 25.0 10.0 250.0
Fin 18.8 3.8 70.3
Fin 18.8 3.8 70.3
CP= summation Axh/ summation A CP=594.7/71.3 CP=8.3 cm
ROCKET PART AREA, A (CM^2) HEIGHT FROM THE Axh
BOTTOM OF THE ROCKET
TO THE MIDDLE OF EACH
SHAPE, h (CM)
Nose Cone 8.7 23.3 204.0
Body 25.0 10.0 250.0
Fin 18.8 3.8 70.3
Fin 18.8 3.8 70.3
CP= summation Axh/ summation A CP=594.7/71.3 CP=8.3 cm
Using kinematic and dynamic equations we calculated the estimated maximum height. We used the equations to find variables such as weight force, acceleration, and final velocity, which ultimately helped us calculate the maximum height. Stage 2 is when the rocket reaches its maximum height, but we must use stage 1 in calculations to help fill in needed unknown variables. We estimated the maximum height to be 32.4m.
Triangulation is process of finding unknown quantities using known values on a triangle. We knew there was 50m from the launch sight to the point measuring the angle when Stage 3 began. We also measured that angle, making it a known. By using trigonometric functions, specifically tangent, we concluded that the real maximum height was 42.0 m.
Percent error calculations is essentially finding how accurate you were with your estimation. To find a percent simply divide the part by the whole and multiply it by 100. In this case the whole is equal to the maximum height found by triangulation and the part is equal to the estimated height minus the triangulated height.