Forge and Boom
Where the forge meets the boom

Bigger show. Better fans.
Be the hero.

Free software for designing DIY fireworks mortar racks. Calculate angles. Simulate the show. Download cut lists and 3D-printable parts.

Design My Mortar Rack → See how it works
Free to start. No credit card. Built in Tennessee.
What it is

A workshop for the show in your head.

Design

Place your tubes, fan your angles, pick your fuse order. Live 2D and 3D preview.

Simulate

Watch the show before you light it. Physics-accurate trajectories, real burst timing.

Build

Cut lists for lumber, STL files for 3D-printed collars and base blocks. Print, build, fire.

Why it matters

Backyard shows deserve real engineering.

Stop guessing at angles.

Eyeballing a fan looks fine on the ground and ugly in the sky. Get the geometry right before the first tube goes in.

Safety isn't a vibe.

Spacing, tilt, and fuse timing are math, not intuition. The app does the math so you can focus on the show.

An investment, not a one-night build.

Your saved design opens next year, and the year after that. Same rack, new show — or tweak a row, reprint a part, and run it again.

How it works

Five steps from idea to ignition.

01
App screenshot

Configure your rack.

02
App screenshot

Set angles and fuse order.

03
App screenshot

Watch the simulated show.

04
App screenshot

Download STLs and a DIY cut plan.

05
App screenshot

Build it. Fire it. Repeat.

3D plate viewer / aerial spread
Show the work

Engineering you can actually trust.

Every output is buildable. Every number is defensible. No black boxes, no guesswork.

  • Physics-accurate ballistics with real burst timing.
  • Watertight CSG-generated STLs ready for the slicer.
  • Bambu P1S-calibrated print estimates.
  • Cut plans optimized for standard lumber.
12.09
min/in · P1S calibrated
0.20
mm layer · watertight
±1°
angle precision
Season Pass

Free to design. Pass unlocks the build.

Free
$0
  • Design unlimited racks
  • 2D and 3D preview
  • Sky preview animation
Start Designing →
No account required to try.
Season Pass · One-time
$29
  • Everything in Free
  • STL downloads
  • DIY cut list
  • Printable build guide
Get the Pass →
Founding-100 lifetime tier — first 100 buyers.
Build a rack that earns the boom.
Design My Mortar Rack →