Nike - Hercules

Took a stab at designing a Nike - Hercules. It ain't to scale... it's Hell-For-Stout... and it sure is cool. 

It's a 2 stage rocket with a single 24mm rear eject sustainer motor and up to (4) 24mm booster motors.

Sustainer is a BT-55

 

 2024-11-22 Cad Model / Outline Drawing

2024-11-23 

Worked on the CAD Model today, added the Spool to the Sustainer and added the Staging Vent, Screw Eyes and Motors to the Booster. Need to add a Launch Lug. Also created Sheet 2 of the drawing package.

 

 2024-11-25

 

Here's the sim and a CAD Drawing of the Nike Hercules with rear eject Booster and Sustainer. Flies on 24mm motors: Booster and Sustainer.

It's got great "off the rail" speed,​

The booster rear eject provides a better chance of deployment before ground hit and places the transition ahead of the fins for durability. Although it remains to be seen if the booster will indeed be stable after staging.​

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There's a lot going on here....​

 

 

 

Astron Sprite Upscale

Here's an Estes Astron Scout upscaled to a BT-80H.

29mm Power

Rear Eject

I used Bruce Levinson's Ring Fin Haack with Open Rocket to check stability.

Looks like a fun build!

 2024-11-10 CAD Model and Drawings, Rev 00

 

2024-11-14: Dog Dish Ring Fin

Spent some time perusing the isles of the local Tractor Supply today and found a dog dish to make the Ring Fin from.​

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Chucked it up in the lathe and parted the side of the bowl.​

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It's a conical shape:​

7-7/16" O.D. Front x 0.128 thick​

6-3/4" O.D. Rear x 0.113 thick​

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Of course that conical shape will be aero draggy... but no worries, it's an exhibition, not a competition.​

 

Also... updated the Open Rocket Model.

 

 

 2024-11-16  Altimeter

 

The altimeter... created a pod and placed it at the base of the rocket. Also rotated the launch lug and hid it in plain sight up against the fin.

 

Greenback.... A Helicopter Recovery

This one has went through 7 different revisions to get to this point.

The rear fin can ejects and floats back to the ground on a chute, while the upper portion deploys (3) blades and spins back.

My only issue is how fast the helicopter blades will bring it down? They generate lift, so it has to be more than a quick area calculation of the blades compared to an equivalent area of a parachute.

I n any event I can't find a calculation for the decent. If you happen to know of one... hook me up.

 2024-11-12  I'd still like a calculation to determine lift and the resultant decent rate? 

I think this rocket is on hold, pending further data.​