AltimeterTwo

Product Description

Description

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A rechargeable digital altimeter (for model rockets only) that analyzes flight altitude, acceleration, top speed, flight duration and 6 other important flight statistics.

The AltimeterTwo retains the rugged design, easily-readable LCD, small size, and rechargeability of the AltimeterOne. With the addition of a 3-axis accelerometer and a 4X speed increase in processing speed, it can provide a full suite of important flight statistics that can help you analyze and improve your rocket’s performance.

AltimeterTwo has been approved by the National Association of Rocketry for use in rocketry competitions.

(Click the image for a larger view.)

Features

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• NEW 64g Edition
• 3-axis, 64g accelerometer can detect launch, acceleration, speed, ejection, and landing
• Accurate 19-bit barometric pressure sensor sensitive to altitude changes of less than one foot
• Daylight-readable LCD display clearly displays all flight statistics−no computer needed
• History feature stores last 500 flights (Version 5.0 and higher)
• Rechargeable Lithium Polymer battery lasts for hundreds of launches, no batteries to buy
• Recharges in less than 2 hours from any standard USB port (cable included)
• Samples pressure 25 times/second, and acceleration over 250 times/second
• Power button turns device ON/OFF and RESETs the display between flights
• Automatically powers down after 2 hours to conserve power
• Handy tether point allows secure attachment
• Rugged ABS construction to survive crashes
• Approved for use in official contests
• Displays results in either English or metric units

Here is a handy Microsoft Excel spreadsheet you can use as an AltimeterTwo flight log
(If you think of any improvements, email them to us at support@jollylogic.com.)

 

AltimeterTwo in Action

Here’s a video by The Rocket N00b demonstrating AltimeterTwo. Great visuals, and Chute Release makes a guest appearance as well!

 

Size and Weight

	English	Metric
Size	0.57″ x 0.71″ x 1.93″	14.5mm x 18mm x 49mm
Weight	0.36 ounces	9.9 grams

 

Range and Precision

 

Simple Instructions

Just want the basics? Here’s how to use the AltimeterTwo, in as brief a form as possible:

1. Press and release the button quickly to turn the AltimeterTwo on or off.

2. Clear and reset for the next flight by holding the button down and releasing it when “Launch” appears.

3. Recharge by plugging it into a USB port on a computer. Make sure a red light appears when you plug it in; take it out after the green light appears.

AltimeterTwo User Guide

AltimeterTwo User Guide

Step-by-Step Tour

Here’s a detailed walk through of how to operate the AltimeterTwo.

Turning It On and Off

Press the button and release it quickly to turn the AltimeterTwo on and off.

Accessing the Menu

If you press the button and continue to hold it down, you will see Menu and then be presented with a series of scrolling choices on the screen, one after another, which you can select by letting go of the button.

Resetting for the Next Flight

If you hold down the button and let go when you see “Launch”, AltimeterTwo will create a new flight record and be ready for the next flight. On the screen, you will now see “Ready”.

After the Flight

The AltimeterTwo will automatically display each of the flight analysis items for each flight.

Flight History

To see the last 500 flights, hold down the button until you see “History,” then release. The last 100 flights will be shown, most recent first. To exit the list, press the button quickly.

Here are the flight aspects analyzed by AltimeterTwo:

	Statistic	Screen	What It Means
1	Maximum Altitude		The highest altitude achieved in flight
2	Top Speed		The top speed of the rocket, measured at the end of the engine thrust phase (in MPH or m/s)
3	Thrust Time		The length of time (in hundredths of seconds) that the engine produces thrust
4	Peak Acceleration		The maximum rocket acceleration sustained for at least 1/60th of a second during engine burn (in Gs)
5	Average Acceleration		The average acceleration from ignition until motor burnout (in Gs)
6	Coast to Apogee Time		The delay between motor burnout and the moment of highest flight (in seconds)
7	Apogee to Ejection Time		The time between the peak of flight and parachute ejection; can be negative if ejection is on the way up (in seconds)
8	Ejection Altitude		The altititude at which the parachute is ejected (in feet or meters)
9	Descent Rate		The average vertical speed from ejection to landing (in MPH or m/s)
10	Duration		Time of flight from ignition to landing (in seconds)

 

AltimeterTwo User Guide 64G Edition

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  How to Use the AltimeterTwo (64G Edition)

AltimeterTwo User Guide

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  How to Use the AltimeterTwo (24G, Version 4.X and below)

AltimeterTwo User Guide (Pre-2014 version)

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  How to Use the AltimeterTwo (classic version)

Recent Version Summary

Version 4.04
> This version has a bug which prevents it from detecting launch
> Please send to us to update to 4.041
Version 4.041
> Latest firmware for non-64g models (cannot be updated to 5.0 for hardware reasons)
Version 5.0
> Initial release for 64g Edition
> 500 flight storage
> Memory can now be completely erased
> Less jittery battery gauge
> Slight odd behavior in 5.0 shows incorrectly low battery level if user holds button until display appears
> Fix: quick click to turn on will show correct level
Version 5.01
> Eliminates behavior where battery is initially incorrectly displayed if user holds button until display appears
Version 5.03
> Fixed ability to erase last remaining flight; fixed history when no flights present