Aerodynamics of Dart Heads Because I Just Can, Bitches
Posted 19 February 2012 - 02:33 PM
Air Pressure Around a Glue Dome Stefan (Red is high pressure, blue is low)
Air Speed Around a Glue Doem (Red is faster, blue is slower)
Air Pressure Around Slug Dart
Air Speed Around Slug Dart
Air Pressure Around Theoretical Pointy Dart
Air Speed Around a Theoretical Pointy Dart
Feel free to comment things you want me to test, or maybe your observations.
Posted 19 February 2012 - 07:17 PM
Insan3 Crab, it's an iPad app.
Aeromech, because its drawing capabilities are very limited.
Posted 20 February 2012 - 06:35 AM
The iPad app is called Wind Tunnel.
Unfortunately, most CFD programs (like this) are inadequate for simulating Nerf dart trajectories. I'm assuming based on your photos that this program simulates incompressible 2D flow around objects without any turbulence models. Incompressible is okay, but 2D is not, especially without a turbulence model. Darts also can flap around, and a CFD model like this doesn't account for that. The drag in this case is probably very different from the drag in a real case.
Testing is the best way to determine the performance of Nerf darts. Get a chronometer, a measuring tape, and do some range tests (trying to avoid wind while you're at it). This'll tell you more.
Posted 20 February 2012 - 07:04 AM
A well made hotglue dome is aerodynamic enough for our purposes, but if you wnat something standardized, check out TaerKitty's NutHeads
This post has been edited by Exo: 20 February 2012 - 07:04 AM