Flight Log - 2023-04-02 - David Frey's Maximus Periculum

Modified with Vander Burn fins/centering rings

Added 1/2" Shock Cord secured with an anchor to inner firewall

 

Update:  After first flight, the parachute was upgraded to a top-flight 18".  The stock parachute was detached due to excessive speed post-apogee

Flight Date: 2023-04-02
Rocket Name: Maximus Periculum
Kit Name: Estes - Der Big Red Max {Kit} (9721) [2021-]
Flyer's Name: David Frey
Motors: G74-9
Expected Altitude: 1,108 Feet
Wind Speed: 10.00 mph
Launch Site: CRASH Launch Site
Actual Altitude: 1,077 Feet

 This flight was to test the Eggtimer Rocketry Quantum altimeter.  It ran it in passive mode (no deployment charges) and performed flawlessly.  See the output below in Results.

Modifications:

  • Added Eggtimer Quantum and 2S 300MaH battery
  • Aerotech G76-8M motor
  • Duck cloth canvas pouch

 

Observations and Results:

  • I only had time for one flight on this rocket today, but it was really cool.  The roar of the motor gets everyone's attention. #AdultDiaper
  • I was not able to see the deployment.  It pulled an Icurus and went right into the sun.  I still have to review the video.
  • The rocket was only short by < 32 feet of the projected apogee.  I believe this rocket is definitely Level 1 certification doable since the H55W is only 76N-s more impulse.  However, if I were constructing this with L1 in mind, I would have used epoxy for the fin can for peace of mind :: Cue the glue holy war ::
  • I may give a G80 a go at some point but the G74 was really what I wanted to get out of this rocket and at $20 a launch, that's about the ceiling for ad-hoc, sport flying.
  • Eggtimer Quantum altimeter was wrapped in a duck cloth canvas bag with the battery to secure it since there's not much room for an av-bay.
    • It performed pretty well.  There were some interesting metrics with the velocities that I believe are attributed to no vent holes and being wrapped up like a burrito.  Still, the altitude curve matches the OpenRocket sim almost verbatim.
    • Since this is a single-deploy, simple rocket configuration, I will probably not drill vent holes unless I come up with another configuration ::Note to self:  Start another build for testing::

 


 

Quantum_D57C86        1.09C

Flight Summary

Flight No.:  3
Mode:.........Deployment
Flight Status:  Landed

Apogee:.........1077
  Time to Apogee.....7.70

Max Velocity.....350
  Time to MaxVeloc.....0.95

Avg Accel(G).....11.44

LDA Alt.........218
  Time to LDA.....0.80

Low V Alt.......1047
  Time to LowV.....6.80

Nose_Over Alt...1034
  Time to Nose-Over.....8.70


Flight Time.....52.20

ASL Alt.........5311
Temp. F.........123.1

Settings
LDA Alt.........200
Launch Samp./sec...20
Nose-Over Samp./sec...2
Drogue: OFF

Main: OFF

FailSafe Velocity...100
FailSafe Time...1000

StageMotor(s)
1Aerotech G74W-9

 

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