Acoustic Apogee Detector

Water Rockets NSW

Moderator: Moderators

air.command
Astronaut
Astronaut
Posts: 1855
Joined: Mon May 14, 2007 11:18 am
Location: Sydney, Australia
Contact:

Acoustic Apogee Detector

Postby air.command » Sat Mar 11, 2017 1:20 pm

Last year we did an experiment where we tried to see if we could detect apogee (for parachute deployment) using only the sound of air rushing past the rocket. Here are the results of those tests:



Realistically I don't think you would use this in practice as barometric or acceleration based sensors are much better at doing that. Still it was fun to see that it is possible.
Crop Circles: ... just a bunch of guys looking for their rockets ....

User avatar
SpaceManMat
Astronaut
Astronaut
Posts: 1599
Joined: Mon Dec 15, 2008 9:56 pm
Location: Brisbane

Re: Acoustic Apogee Detector

Postby SpaceManMat » Sat Mar 11, 2017 2:21 pm

Nice experiment George

Be interesting to do side by side comparison with baro and accelerometer data over the flight.
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 10,849 feet
Largest Motor: CTI 1115J530 IM
Current Project: X Wing

User avatar
CATO
Mr Smiley
Mr Smiley
Posts: 1717
Joined: Thu Dec 24, 2009 6:20 pm
Location: Sydney, NSW
Contact:

Re: Acoustic Apogee Detector

Postby CATO » Sat Mar 11, 2017 3:45 pm

Well down George (and family), as always, just awesome...
"In thrust we trust"

AMRS L3
AMRS Technical Advisory Group - CO

Impulse:
2017: 00,000 Ns (00.00% A)
Ns 16: 34,558; 15: 35,955; 14: 6,016; 13: 10,208
PB - Gorilla N2717WC, H: 10,260', S: 1.14M

air.command
Astronaut
Astronaut
Posts: 1855
Joined: Mon May 14, 2007 11:18 am
Location: Sydney, Australia
Contact:

Re: Acoustic Apogee Detector

Postby air.command » Sat Mar 11, 2017 7:18 pm

Thanks David and SpaceMan,
SpaceManMat wrote:Be interesting to do side by side comparison with baro and accelerometer data over the flight.

That's a good idea, I should have flown the logging altimeter on those flights to see how it compares. I do want to fly it again, but want to refine the algorithm a bit first. I recently bought one of those OpenLog loggers, so I will hook that up too so I can record what data the micro is working with.
Crop Circles: ... just a bunch of guys looking for their rockets ....


Return to “Air Command Water Rockets”

Who is online

Users browsing this forum: No registered users and 1 guest