2,020 Altitude Limit Contest

Entry Information

Entry Fee: $5 per flight (no limit on number of flights)

Make sure to declare your flight as “2,020 Contest” flight prior to launch.

Remember to record your flight’s altitude on your flight card.

Deposit your entry fees with the club’s Contest Director (Brad Morse).


Build and fly a model rocket that will reach as close to 2,020 feet AGL without going over.


Build Constraints

The rocket must be stable and constructed with materials approved by NAR or Tripoli, you may also use a kit.

Tie Breakers

  • Lowest motor impulse
  • Least number of attempted flights


Cash prizes for First and Second place will be a % of the entry fees collected.

First Place: 70% of entry fees.

Second Place: 30% of entry fees.

Launch Log System Update 2020

New launch log system updates are underway.  Here are some of the highlights.

Launch Logs

What’s New

Flights and Flyers

The number of unique flyers has been added to the by-month charts.

Speed Demon

The fastest flight.  This new leaderboard applies to flight data beginning in 2020.  Historical flight data did not record speed as a separate field, the chart is not available for events prior to 2020.

Powder Keg

Bonfire for Black Powder.  Total mass = sum(motor_weight) for Black Powder motors only. 


Chart Updates

Many of the charts have been updated to include additional information, such as the number of flights, or the number of motors that contributed to an individual rank on a given leaderboard.

Now you can see more detail, for example, in 2013 the bonfire was won with just 4 motors!


Behind the Scenes

A large amount of the work that went in to the site over the last month was to improve the flight card record entry screen(s).  These pages are only available to the club president and a handful of other individuals.

Flight Card Entry

A listing of all flights for a given launch are available to the administrator to provide a reference of what cards have already been entered.  This new feature also provides a delete option.
Flyer name selection from known-flyer database, or enter new flyer name, membership status and cert level.
Ability to update flyer information.
Rocket information and cert-flight detail.
Motor configuration for the flight includes single motor, clustered, and multi-staged flights.  The motor database is supported by Thrustcurve.org.
Recovery and flyer comment.
Flight data and launch notes.


2020-01 Atlas Launch

2019-06 Mile High Mayhem [North Site]

Flight Logs

At long last, the Flight Logs are back online. 

The new system introduces several new features including visual reports for each year, and for each launch event.

The Bonfire calculation leverages thrustcurve.org to obtain motor weight information to augment the flight records

Bonfire Leaderboard

Additional reporting includes the Mile High Club, and all-time altitude records.

2019 Contest – Classic Alphabet

Entry Information

$10 Entry Fee

$10 Re-Entrance Flyers may re-enter the contest for an additional $10 if they are disqualified.

Make sure to declare your flight as an “Alphabet Contest” flight prior to launch.

There will be a contest registration sign-up sheet at the flight table.

Deposit your entry fees with the club’s Contest Director.

Contest Rules

Fly and successfully recover a model rocket, using each motor class in succession: A, B, C, D, E, F, G, H, I, J, K, …

You may use a different rocket for each flight, or the same rocket for multiple flights as you desire.  Each flight must be declared prior to launch as a contest launch, and designated on your flight card.


Flyers who are disqualified, and buy-back-in, will start at the motor that they were disqualified at.  For example, if your E flight failed, you would continue the contest at an E impulse motor.


If you have a failure resulting in damage that prevents a second flight without repair, or you are unable to recover the rocket, then your last successful flight will be recorded as your final flight for the contest.


First Place: 60% of the collected entry fees.

Second Place: 30% of the collected entry fees.

Third Place: 10% of the collected entry fees.

Additional Considerations

Multiple Stages

Multiple stages may be used to accomplish multiple letters of the alphabet in a single flight.  You must recover all stages successfully.  Limit up to and including 3-stages.

Contestants must progress through the alphabet contest sequentially.

You cannot skip any letters of the alphabet, flights with multiple motors that are not sequential are allowed, but you can only achieve a single letter in the alphabet contest if your staged-motor configuration is not sequential.

Ignition sequence does not have to be alphabetical.  You may fly a staged rocket that has a C as the booster, and a B as the sustainer (assuming you have successfully completed your A impulse flight).


The total impulse of the cluster can be substituted for the impulse letter in the alphabet.  For example, a cluster of 6 (six) E motors @ 40ns each would have a total impulse of 240ns, which is equivalent to an H motor.

Impulse Thrust Range (ns)
1/4 A 0 to  0.625 ns
1/2 A 0.625 to  1.25 ns
A 1.25 to  2.5 ns
B 2.5 to  5 ns
C 5 to  10 ns
D 10 to  20 ns
E 20 to  40 ns
F 40 to  80 ns
G 80 to  160 ns
H 160 to  320 ns
I 320 to  640 ns
J 640 to  1,280 ns
K 1,280 to  2,560 ns
L 2,560 to  5,120 ns
M 5,120 to  10,240 ns
N 10,240 to  20,480 ns
O 20,480 to  40,960 ns
P 40,960 to  81,920 ns
Q 81,920 to  163,840 ns