This is a quick crib sheet to help you as you build model rockets. There is much more to be found on the Internet. If you find a helpful link please share it in the comments section below.

To Convert Inches (in) to Centimeters (cm): *(in) * 2.54 = (cm’s)*

**Example**: 5 in * 2.54 = 12.7 cm

To Convert Feet (ft) to Meters (m): *(ft) / 3.281 = (m)*

**Example**: 7 ft / 3.281 = 2.1335 m

To Convert Meters (m) to Feet (ft): * (m) * 3.281 = (ft)*

**Example**: 30 m * 3.281 = 98.43 ft

*Updated 7-20-16, some of the links below have changed the content and no longer include the simple altitude calculation so we have added it below.*

To calculate the height of a right triangle: *tan*(angle) * distance = height

*(yes, use a calculator to find the tangent)*

**Example:** *tan*(59°) * 100 feet = 166.43 feet

**Example**: Sandy is launching her rocket. Her cousin, Tim, is standing * 300 feet* away with a protractor when Sandy launches her rocket. The protractor angle reads

*when the rocket reaches its highest point, known as*

**127°***apogee*. Tim knows he needs to

*from the angle on the protractor to get the correct angle. How high did the rocket go?*

**subtract 90°***tan*(127° – 90°) * 300 feet = height

Simplify

*tan*(37°) * 300 feet = height

Simplify

~0.75355 * 300 feet = height

Simplify

~226.07 feet = height

Sandy’s rocket flew about 226.07 feet in the air. (We round off the extra digits after .07)

**Finding a side in a right-angled triangle**

https://www.mathsisfun.com/algebra/trig-finding-side-right-triangle.html

**How to measure model rocket altitude**

http://www.hobbizine.com/rocketaltitude.html

**Rocket Center of pressure calculator**

http://physics.gallaudet.edu/tools/rocketcop.html

**Rocket Altitude Calculator**

http://www.unm.edu/~tbeach/flashstuff/RocketAltitudeFixedSize.html

**Determine Maximum Altitude**

http://exploration.grc.nasa.gov/education/rocket/rkthowhi.html

**OpenRocket Model Rocket Simulator – Freeware**

http://openrocket.sourceforge.net/

**Altitude Tracking**

http://quest.arc.nasa.gov/space/teachers/rockets/act9.html

**Flight Simulator Programs (List of different software)**

http://www.thrustcurve.org/simulators.shtml

## 1 comment

Here is a cool and easy on-line calculator.

They don’t learn any math but it works slick when you need to calculate several and quickly at a group lauch.

https://www.pagetutor.com/trigcalc/trig.html