BASE Jumping with Accelerometers

by Nate  |  
October 3, 2008  |  

http://www.sparkfun.com/tutorial/news/BaseJump1-M.jpg
Well, that's one way to get back down the mountain.

Michael Cooper sent us these amazing photos and data plots:
"I thought you guys might get a kick out of this. I wrote my own firmware for the WiTilt, which gives 250 Hz of accelerometer data with 16x oversampling. The data is sent via Bluetooth® connection to my Palm Tungsten, which takes care of logging."

http://www.sparkfun.com/tutorial/news/BaseJump4.jpg
Jump Plot

"A couple of weeks ago, I took it for a BASE jump from my favourite 1200-foot cliff. I’ve attached data from the freefall portion of the jump and the first few seconds of canopy flight. The grid is 1 second on the x-axis, and 1 G on the y-axis. The black line shows total acceleration, while the coloured lines show each axis (after calibration). In the 'jump' plot, you can see clearly where I jump, at the 1 second mark, and where the canopy opens, at the 9.75 second mark, after 8.75 seconds of freefall. You can also see the point, at about 3 seconds, where wind resistance becomes significant, after which I appear to be resting on my belly on a cushion of air."

http://www.sparkfun.com/tutorial/news/BaseJump2-M.jpg
Whooooooooooaaaaaa! That's awesome!

http://www.sparkfun.com/tutorial/news/BaseJump3.jpg
Canopy Plot

"Opening shocks, visibly mostly in the 'canopy' plot, are a bit of a jumble of actual opening shock (which is quite a blow), and oscillations which show me being kicked out under the open parachute... I've often compared the opening of a BASE parachute to a car wreck. Of
course, we like our parachutes to open fast, but I will often feel symptoms
of whiplash after a weekend of jumping. "

Thank you so much Michael! Those pictures send chills down my spine. Keep jumping, and stay safe!

Now for slightly less adrenaline pumping photos - new products!



New USB eval board for our RFID readers. This simple board allows you to plug in the RFID module of your choice. Bring a card near the reader and you'll get a serial stream containing the unique ID of the card. Nice and simple. We've also posted the Eagle files to help out the SparkFun interweb of users.



GS406 is a powerful GPS receiver with a Sarantel Helical Antenna and a uBlox 4HZ engine. Now you can get solid GPS coordinates 4 times a second!



We brought back our WiFi category just for this new module. The WiFly is right up our alley: It's a simple to use, small, low-cost module, and this time it's for WiFi wireless. Now you can connect your embedded project over 802.11b with just a serial connection.



We've updated the pictures for our Button Pad breakout. We've also posted the Eagle files for this board!



Yay! The way KinetaMap was supposed to look - now with a label!

 

Comments

6 comments


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BricoGeek's rank:
+2.9
|   October  3, 2008 at 10:33 AM
Comment rating:
0
whooaaaahhh!!! hahaha
by
bau's rank:
+3.2
|   October  3, 2008 at 12:04 AM
Comment rating:
0
Very nice :) What is terminal velocity in your human configuration?
by
crwper's rank:
+16
|   October  3, 2008 at 12:25 AM
Comment rating:
+0.15
About 120 mph. It takes about 12 seconds to get there, but by 9 seconds, you're already going more than 110 mph. You can see the z acceleration levels out significantly at about 7 seconds on the plot, after which the plot looks pretty much like someone lying on their stomach (with a lot of wind noise).
macoklein's rank:
+1.6
|   October  3, 2008 at 6:58 PM
Comment rating:
0
where was that picture taken?
by
crwper's rank:
+16
|   October  4, 2008 at 12:02 AM
Comment rating:
0
The jump is in the Canadian Rockies.
jesseluna's rank:
+1
|   October  9, 2008 at 9:38 AM
Comment rating:
0
Sweet! I shared this link on Twitter.
@jesseluna

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