AltimeterTwo is an instant flight analysis tool for model rocketry, no computer required. It is small enough to fit in most rockets, and it provides 10 key flight performance measures on its sunlight-readable screen for each flight, including max altitude, top speed, engine thrust duration, peak acceleration, ejection timing, and total flight time.
No batteries required. AltimeterTwo is rechargeable and includes a recharging cable that works in common USB ports.
Approved for National Association of Rocketry contests.
Will only work for model rockets.
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.)
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.)
Here’s a video by The Rocket N00b demonstrating AltimeterTwo. Great visuals, and Chute Release makes a guest appearance as well!
ENGLISH
METRIC
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
Step-by-Step Tour
Here’s a detailed walk through of how to operate the AltimeterTwo.
Press the button and release it quickly to turn the AltimeterTwo on and off.
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.
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”.
The AltimeterTwo will automatically display each of the flight analysis items for each flight.
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)
How to Use the AltimeterTwo (64G Edition)
How to Use the AltimeterTwo (24G, Version 4.X and below)
How to Use the AltimeterTwo (classic version)
Version 4.04> This version has a bug which prevents it from detecting launch> Please send to us to update to 4.041Version 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 levelVersion 5.01> Eliminates behavior where battery is initially incorrectly displayed if user holds button until display appearsVersion 5.03> Fixed ability to erase last remaining flight; fixed history when no flights present
