Estes Big Daddy Stress Test Challenge - modded BD monsters!

At Sod Blaster 2019, the Tri-Cities Rocketeers held a Big Daddy Stress Test Challenge contest. The goal of the challenge was to build an Estes Big Daddy and fly it successfully on as big of a motor as you dare.
Scoring was determined by multiplying the motor's average thrust (N) by its total impulse (Ns). Altitude was not a scoring consideration, but the rocket must be flown and recovered successfully.
There were two divisions: Mod Stock and Unlimited. In Mod Stock, competitors were allowed to increase the motor mount size to 29mm, and upgrade the standard elastic shock cord to something more heavy duty. Rail buttons were also allowed. Otherwise, the rockets must remain in stock form, including using the supplied body tube and balsa fins.
The Unlimited category, on the other hand, only required competitors to maintain the original dimensions of the Big Daddy, and use the nose cone supplied in the kit. All other mods from the original kit were allowed.
This video is a compilation of the entries flown at Sod Blaster 2019. Enjoy!

[@mindofwij7443]

This is one of the coolest videos based on one of the coolest rocket designs! Well done!

[@seancarroll8103]

Great video! Great rockets! I hope you Rocketeers do this contest again.

[@polakrocketing171]

0:35 Beautiful sound! Loved the vid as always! :) 🚀

[@michaelc6817]

Great contest. If only we had such a nice launch site in SoCal.

[@rocketsbyodin5499]

Very cool! Thank you for sharing!

[@thefreewayoctopus]

Scores: Not in contest: N/A (H97) Mod stock: DNF (G78) DNF (F51) 2,871 (F63) 11,450 (G100) 7,923 (G77) 16,000 (G125) 201(D12) DNF (G150) 20,300 (G145) (mod stock winner) Unlimited: 52,920 (I161) 63,630 (J90) 240,345 (J315) (flyfalcons' rocket) (Unlimited winner)

[@flyfalcons]

Dang, thanks for putting that together!

[@thefreewayoctopus]

Not that hard for me, I have a good memory for numbers. Just watch the video , type as much as I remember, and then watch it again to fill any gaps. And watching it twice is no problem, rockets are awesome! Your channel is the best rocketry channel I've seen.

[@edccrocketryclub3880]

This is awesome!

[@normrubio]

That's awesome!

[@andrewmitchell5807]

This is so cool, I feel dumb asking this, but what is a drag separation?

[@flyfalcons]

This may sound counterintuitive, but while a rocket is coasting, there is more aerodynamic drag on the booster/fin section than on the nose cone. Especially with rockets that have a heavy nose cone (like adding weight to a Big Daddy cone.....), the nose cone may carry more momentum after motor burnout than the booster section. If there is not enough friction between the nose cone and booster section, the two parts can actually separate after the motor burns out. This is known as a drag separation.

[@andrewmitchell5807]

@@flyfalcons wow, I've never thought of that possibility. Thanks for the explanation!

[@judet2992]

@@andrewmitchell5807 Who needs ejection charges when you are *UNSTABLE?*

[@doublediamondrailroad5949]

Just Wow! 😮

[@bingusbobby5012]

You are lucky you have a permanent place to launch big rockets my launch site closed down because we were on a navy air field and a rocket landed on a power line

[@flyfalcons]

We are very fortunate to have a good site, though nothing is ever truly permanent. We hope to continue our good relation with our land owner for a long time.

[@FounderOf4]

Great video... could someone explain the scoring calculations to me?

[@judet2992]

Specific impulse is weird. Look it up, and that will be a much better explanation than we can give you.

[@FounderOf4]

@@judet2992 it's been a long 2 years and thank you for the reply. I appreciate your time and will be looking into that tonight!

[@judet2992]

@@FounderOf4 lol no problem.