Madcow Twitch RockSim File Needed

Hey, everyone! I'm going to be getting a kit for a 3" Dual Deploy Twitch from Madcow Rocketry for my L2 cert. Here's a link for reference: https://www.madcowrocketry.com/3-thin-wall-fiberglass-dual-deploy-twitch/

Unfortunately, there is no RockSim file listed on their website for that particular kit. I was hoping to use the simulations to help me choose a motor for it. Does anyone know where I might find one, or one similar enough to approximate with? If not, any advice on choosing a good L2 motor for the design would be great as well.

Thanks!

-Josh

There is a Rocksim file for their shorter version (lower right on this page): https://www.madcowrocketry.com/3-thin-wall-fiberglass-twitch/

Should be easy enough to modify it for the dual deploy.

Doug

hi Josh,
Attached is my beginning of a Rocksim file for the MadCow 3" DD Twitch.
It is rough start.
Hope it helps.
Ken
View attachment fgtwitch30 -DD-wc-KBW08252016.rkt

Along these Rocksim lines, I have been searching to no avail, for information on the thin wall FG parts to add to Rocksim.
Can anyone assist?
Ken

For simple motor selection and delay calculation purposes just put the weight, diameter, and a guess of the Cd into thrustcurve.com.

Hi Josh.

I made my Twitch dual deploy before the official DD kit came out. You should be able to make any minor adjustments and be good to go. Ours flies great on 4 grain I's.

Don

View attachment fgtwitch30 DD mod through NC.rkt

Thanks for all the replies, everyone! I'll take a look at all my options and decide from there.