Skp
Well-Known Member
- Joined
- Mar 29, 2013
- Messages
- 227
- Reaction score
- 10
I have finished an Estes V2 with the exception of the nose wght.
I have cut the fins to scale and added the pods.
The livery is from Operation Backfire.
The string attached to the rocket is the CG while it is fully loaded with parachute, chute release, JL alt3 and an Aerotech F35-8W 24/60 reload(the largest motor I imagine ever using)
I am aware that openrocket does a very poor job of figuring the CP of a boattail rocket.
Rocksim uses an average bt dia that gives a closer approximation of the CP, but according to the Apogee Newsletter that I read, it is still conservative.
I did the swing test and when started pointed forward it remained forward. When it was started tail first, it tried to turn nose forward, but was not able to make the turn.
I understand that the swing test is also conservative, and that a rocket may fail the test and still fly stable.
I have rail buttons for longer guidance at liftoff.
I believe that it will fly stable as is.
I will also load with a D12-5 and string test it, as well as with a E9-6.
I have a launch on Sunday and would appreciate community input regarding experience with the V2 CG point.
I have cut the fins to scale and added the pods.
The livery is from Operation Backfire.
The string attached to the rocket is the CG while it is fully loaded with parachute, chute release, JL alt3 and an Aerotech F35-8W 24/60 reload(the largest motor I imagine ever using)
I am aware that openrocket does a very poor job of figuring the CP of a boattail rocket.
Rocksim uses an average bt dia that gives a closer approximation of the CP, but according to the Apogee Newsletter that I read, it is still conservative.
I did the swing test and when started pointed forward it remained forward. When it was started tail first, it tried to turn nose forward, but was not able to make the turn.
I understand that the swing test is also conservative, and that a rocket may fail the test and still fly stable.
I have rail buttons for longer guidance at liftoff.
I believe that it will fly stable as is.
I will also load with a D12-5 and string test it, as well as with a E9-6.
I have a launch on Sunday and would appreciate community input regarding experience with the V2 CG point.