Do you think it broke mach?

[rockets]

[video=youtube;dbjV2kEfYyw]https://www.youtube.com/watch?v=dbjV2kEfYyw[/video]
This is my first MD flight from over a year ago. It was 20 inches tall, 24mm diameter, and flew on a Eliis G37-10. Lost the nose cone with altimeter.
SKIP TO 3:52 FOR LAUNCH I'm not sure if it went mach, and I know it's tough to tell by video, but I just want some guesses & thoughts.

Thanks,

 

[dhbarr]

What was the total weight?

 

[rockets]

About 4 OZ WITHOUT the motor.
Thanks,

 

[OverTheTop]

What do your simulations show, based on actual launch mass?

 

[Flyfalcons]

A quickie on Thrustcurve shows 1,137 feet per second, which is right at Mach 1. So tough to tell for sure without altimeter data. Based on the spin on the way up though, I don't think that speed was realized.

 

[rockets]

What do your simulations show, based on actual launch mass?

Don't have a simulater. YES, I know that OP is free, but I couldn't download it: (It's a long story.)

Thanks,

 

[tim cubbedge]

Try downloading RocSim. They have a 30 day free trial. Also have you used ThrustCurve? That will give you a better ballpark than watching video.
https://www.thrustcurve.org


Sent from my iPhone using Rocketry Forum

 

[rockets]

Try downloading RocSim. They have a 30 day free trial. Also have you used ThrustCurve? That will give you a better ballpark than watching video.
https://www.thrustcurve.org


Sent from my iPhone using Rocketry Forum

Have used up my trial, and and have used thrust curve.
Thanks,

 

[tim cubbedge]

Have used up my trial, and and have used thrust curve.
Thanks,

What did ThrustCurve say? That’s always pretty close to OR and OR is usually a bit aggressive.

 

[rockets]

A quickie on Thrustcurve shows 1,137 feet per second, which is right at Mach 1. So tough to tell for sure without altimeter data. Based on the spin on the way up though, I don't think that speed was realized.

Thanks,

 

[tim cubbedge]

So more than likely you did not bust Mach.


Sent from my iPhone using Rocketry Forum

 

[rockets]

So more than likely you did not bust Mach.


Sent from my iPhone using Rocketry Forum

Just did the sim again, and it came to about 795 MPH, but that does include the canted fins.
But, hey, that old Ellis G37 was still sweet to fly, even though I lost the rocket.
Thanks,

 

[tim cubbedge]

Just did the sim again, and it came to about 795 MPH, but that does include the canted fins.
But, hey, that old Ellis G37 was still sweet to fly, even though I lost the rocket.
Thanks,

What are you using to sim it?

 

[rockets]

What are you using to sim it?

Thrust Curve.
Thanks,

 

[tim cubbedge]

Thrust Curve.
Thanks,

Thanks,