Hall effect in free air

[John]

Hi.
I need to find a way to enable a parachute deployment timer on a model
rocket, and was wondering what the free air and higher (1-10) G effects
would be on a normal hall effect sensor.
Thanks.

 

[CFoley1064]

Subject: Hall effect in free air
From: "John" Reeferjon@msn.com
Date: 11/28/2004 4:02 AM Central Standard Time
Message-id: <7nhqd.39470$F7.333@fe1.news.blueyonder.co.uk

Hi.
I need to find a way to enable a parachute deployment timer on a model
rocket, and was wondering what the free air and higher (1-10) G effects
would be on a normal hall effect sensor.
Thanks.

Hi, John. Hall effect sensors are used extensively in automotive and other
environments where moderate shock/vibration requirements are a consideration.
You shouldn't have any problem with this.

Good luck
Chris

 

[Gary Lecomte]

"John" <Reeferjon@msn.com> wrote in message news:<7nhqd.39470$F7.333@fe1.news.blueyonder.co.uk>...

Hi.
I need to find a way to enable a parachute deployment timer on a model
rocket, and was wondering what the free air and higher (1-10) G effects
would be on a normal hall effect sensor.
Thanks.

If you are meaning any changes to Magnetic Effects, I really doubt any.

 

[John]

Thanks Chris.
I guess the only way is to load it as a payload for test and see what the
effects will be before I commit it to actual work.
John.

"CFoley1064" <cfoley1064@aol.com> wrote in message
news:20041128101458.21787.00001139@mb-m12.aol.com...

Subject: Hall effect in free air
From: "John" Reeferjon@msn.com
Date: 11/28/2004 4:02 AM Central Standard Time
Message-id: <7nhqd.39470$F7.333@fe1.news.blueyonder.co.uk

Hi.
I need to find a way to enable a parachute deployment timer on a model
rocket, and was wondering what the free air and higher (1-10) G effects
would be on a normal hall effect sensor.
Thanks.

Hi, John. Hall effect sensors are used extensively in automotive and
other
environments where moderate shock/vibration requirements are a
consideration.
You shouldn't have any problem with this.

Good luck
Chris

 

[Rich Grise]

On Sun, 28 Nov 2004 10:02:43 +0000, John wrote:

Hi.
I need to find a way to enable a parachute deployment timer on a model
rocket, and was wondering what the free air and higher (1-10) G effects
would be on a normal hall effect sensor. Thanks.

If you're expecting to time your parachute deployment based on G effects,
I suggest you go to the library and look up a book on model rocketry.

Do you expect your rocket to coast to any appreciable experimental
altitude before deploying the chute?

Then you're going to wind up with a timer, no matter what kind of G sensor
you use, because as soon as the motor is done firing, the whole rocket is
in zero-G. This is also known as "free-fall."

And putting some kind of sensor to electronically determine when the
rocket motor is done firing is kind of dumb, considering you can get
rocket motors with a timed "after-charge", designed for doing stuff like
deploying parachutes.

Good Luck!
Rich