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Breakdown

• S22 & Prior Flight Tests

  • todo add ones hereMarch 7, 2022

    • Did Not Crash

  • April 10, 2022

    • Crashed

    • control system failure

    • loose motor mount

    • mechancial failure

  • Flight Test - April 8, 2017

    • Did Not Crash

  • 2022-05-18 CV Flight Test

    • Unknown

  • 4/8/2018 Flight Test

    • Did Not Crash

  • 4/8/2018 Flight Test Summary

    • Did Not Crash

  • Flight Test - April 2, 2017

    • Did Not Crash

• 2022 - 2023 Flight Tests

  • todo add ones here

  • Nov 13, 2022 Flight Test

    • Crashed

    • Crashed Phoenix Nov 13, 2022 - Phoenix RCA electronic failure, unknown cause, my guess:

      • transient on bus from ESC regen => HS FET damage, stuck on => melt PDB IC and downstream load (minipix).

    • Crash Judie Nov 13, 2022 - JUDIE RCA pilot error in controller configuration

  • Nov 27 , 2022 Flight Test

    • Crashed

    • Nov 27, 2022 - Phoenix RCA

    • Phoenix crash → Weather and controller setup

  • Dec 4, 2022 Flight Test

    • Did not crash

  • Dec 13, 2022 - Battery Incident RCA

    • not a flight test

  • Jan 22, 2023 Flight Test

    • Crashed

    • poor soldering on ESC (confirmed)

  • Feb 11 2022 Flight Test

    • Crashed

    • mechanical failure (motor mount snapped, possible cause is use of heat gun)

  • Feb 18/19, 2023 Recording Landing Pad For Training

    • Did Not Crash

  • February 19, 2023 Frosted Flakes Validation

    • Crashed

    • 2023-02-19 - RCA for Frosted Flakes Crash Feb 19th

    • lots of damage here

    • poor airframe control authority mechanically

    • battery voltage sag ← going to call this a secondary cause, we were already crashing before this occurred?

  • Mar 04, 2023 RFD Range testing and ZP Testing

    • Crashed

    • 2023-03-04 - RCA for Houston Failsafe-Disarm Crash

    • crashed houston

    • pilot error

  • Mar 11, 2023 Cornflakes Validation

    • Did Not Crash

  • Mar 18, 2023 Flight Test

    • Did Not Crash

  • https://uwarg-docs.atlassian.net/wiki/spaces/FT/pages/2207383694/Apr+02+2023+Flight+Test+WRESTRC

    • Did Not Crash

  • Apr 09, 2023 Flight Test

    • Crashed

    • prop destroyed

    • highly likely to be poor solderring 2023-04-09 - RCA for Signal Integrity

  • April 22-23 Ground Test Sequence

    • Unknown

  • Apr 30, 2023 Flight Test

    • Did Not Crash

  • https://uwarg-docs.atlassian.net/wiki/spaces/FT/pages/2231500801/May+05+-+Practice+Flight

    • Unknown

  • May 6th, 2023, Icarus as a Quad

    • Unknown

  • May 6th, 2023, Task #1

    • Unknown

• S23 Flight Tests

  • May 31, 2023 Houston Flight Test

    • SuccessDid Not Crash

  • June 11, 2023 Flight Test

    • SuccessDid Not Crash

  • June 25, 2023 Flight Test

    • SuccessDid Not Crash

  • July 9 - Vanny for CV Auto Landings

    • SuccessDid Not Crash

  • July 16, 2023 Flight Test

    • Unknown

  • July 23, 2023 Flight Test

    • SuccessDid Not Crash

  • July 28, 2023 Flight Test

    • SuccessDid Not Crash

  • Aug 20, 2023 Flight Test

    • SuccessDid Not Crash

    • Poor tune caused concern.

• F23 Flight Tests

  • 2023-12-02 Flight Tests

    • Landing gear stuck in mud after landing and attempt to take off again

    • Caused prop damage (maybe motor damage)

  • 2023-11-26 Flight Tests

    • SuccessDid Not Crash

  • 2023-11-19 Flight Tests

    • SuccessDid Not Crash

    • location questionable

  • 2023-11-18 Flight Tests

    • SuccessDid Not Crash

    • questionable landing

  • 2023-11-12 Flight Tests

    • Unknown

  • 2023-11-11 Flight Tests

    • Houston controller config was poor

    • we didnt crash pegasus but connector concern

    • SuccessDid Not Crash?

  • 2023-11-04 Flight Tests

    • SuccessDid Not Crash

  • 2023-10-28 Flight Test

    • SuccessDid Not Crash

  • 2023-10-21 Flight Tests

    • killed some hardware on the ground

    • SuccessDid Not Crash

  • 2023-10-14: Pegasus Hover, ZP3.5 M1, & Pilot Trainning

    • Failure

    • Motor Order in software for pegasus

    • Tubie due to airframe structure

  • 2023-10-07 Houston Missions

    • Unknown

  • 2023-10-07 PEGASUS spin-up

    • SuccessDid Not Crash

  • 2023-09-23 Houston Dry Flight

    • SuccessDid Not Crash

  • 2023-09-30 Pathing Script Flight Test

    • SuccessDid Not Crash

• W24 Flight Tests

  • todo add ones here

Sums

• TODO

Conclusions

• TODO

  • 2024-04-06 Pegasus CS2

    • Did Not Crash

    • good control

    • poor video

  • 2024-03-30 Pegasus E2E

    • Did Not Crash

  • 2024-03-23 Comp Sim #1

    • Crashed

    • Pilot error in landing

    • broken landing gear

  • 2024-03-16 Pegasus VTX + Houston Auto Flight Test

    • Did Not Crash

  • 2024-03-10 NO-GO Pegasus VTX Flight Test

    • Cancelled

  • 2024-02-10 Pegasus + Houston Flight Test

    • Crashed

    • Weather caused tipping on landings

  • 2024-02-03 Pegasus Efficiency Flight Test

    • Did Not Crash

  • 2024-01-27 Pegasus + Houston Flight Test

    • Did Not Crash

    • battery failsafe saved us from crashing on an over discharge

  • 2024-01-20 Pegasus 4v6 battery Flight Test

    • Did Not Crash

    • risk of no loss of comms failsafe

Conclusions

• Causes of every crash (including duplicates):

  • Weather caused tipping on landings (environmental )

  • Misjudged landing (controls pilot)

  • Motor Order (controls software)

  • Wingspare mechanical integrity (mechanical)

  • Aircraft stuck in mud (environmental)

  • Signal wire soldering (electrical)

  • Accidental disarm (controls pilot)

  • Mechanical Control Authority (mechanical)

  • Motor Mount Broke (mechanical)

  • Signal wire soldering (electrical)

  • Weather caused lack of control (environmental)

  • Controller configuration (controls software)

  • Electronic component failure (electrical)

  • Loose Motor Mount (mechanical)

• Categorizing Even More (removing duplicates):

  • Environmental (3)

  • Controls (4)

  • Mechanical (4)

  • Electrical (3)

  • Total (14)

  • Fairly even split here I guess lol

• We should be careful about a few cognitive biases when reviewing this data

  • sampling bias

    • we don’t have a lot of data here.

    • differences in airframe have a large impact on likely failure modes.

  • survivorship bias

    • Just because something doesn’t appear in the list doesn't mean it’s not a concern.

    • In my opinion we’ve had so many close calls because of motor order and poor soldering concerns, however, these are underrepresented in the failure modes observed