FjStix
Active Member
- Joined
- Nov 9, 2020
- Messages
- 25
- Reaction score
- 32
I am designing and building this rocket based off of the best simulation results I can get in RockSim. It is a 66mm Tube which is 48" L, A 29mm Motor Mount with either an Aerotech F20 or F67 Motor. My main questions are as follows:
1) What's the threshold for Longitudinal G-Forces leaving the rail? I understand this comes down to build quality at a certain point. I am hovering around 25 G's @ 70-75 Ft/s within the first 48". Any concerns or is this well within norminal?
2) What is a High Ft/S Descent rate at chute deployment? I am using a 24" Nylon Chute and with the Chute Release drag, I am within 80-100 Ft/S at Deployment. Too Fast? Again, I understand if the shock cord isn't installed adequately then bad things will happen.
3) Piggy-Backing on the previous question. What is the max Ft/s @ Chute Deployment you would recommend. I am a champion at losing rockets and want to get this down as close as I can before releasing the main. I am factoring in the drag of the folded chute/chute release which is deployed near Apogee of 1,500 Ft.
4) Final question - If there was one thing you would warn a new rocketeer about for their first flight above a few hundred ft, what would it be? I am thinking of doing a build thread to gather as much information and guidance as possible.
Thanks All!
1) What's the threshold for Longitudinal G-Forces leaving the rail? I understand this comes down to build quality at a certain point. I am hovering around 25 G's @ 70-75 Ft/s within the first 48". Any concerns or is this well within norminal?
2) What is a High Ft/S Descent rate at chute deployment? I am using a 24" Nylon Chute and with the Chute Release drag, I am within 80-100 Ft/S at Deployment. Too Fast? Again, I understand if the shock cord isn't installed adequately then bad things will happen.
3) Piggy-Backing on the previous question. What is the max Ft/s @ Chute Deployment you would recommend. I am a champion at losing rockets and want to get this down as close as I can before releasing the main. I am factoring in the drag of the folded chute/chute release which is deployed near Apogee of 1,500 Ft.
4) Final question - If there was one thing you would warn a new rocketeer about for their first flight above a few hundred ft, what would it be? I am thinking of doing a build thread to gather as much information and guidance as possible.
Thanks All!