Ralph Wu
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Ralph Wu's Groups

Ralph Wu's Discussions

Sending APM to near space and return?

Started this discussion. Last reply by Larry Grater Jan 1, 2014. 17 Replies

I am thinking sending APM power glider to near space by balloon and return home.  Anyone already made it?…Continue

 

Ralph Wu's Page

Latest Activity

Larry Grater replied to Ralph Wu's discussion Sending APM to near space and return?
"My release was servo activated and the servo was inside the insulated airframe (as was my elevator servo).  The servo was controlled with APM based on altitude, longitude, freefall and time constraints.  Some of that is probably not…"
Jan 1, 2014
Mhmoud Essalah replied to Ralph Wu's discussion Sending APM to near space and return?
"Thanks for sharing that Larry, and congratulations, I'm going to be frank and say that you will be heavily cited in our research. But I was hoping you could help me out here: I'm interested in your release mechanism, I've seen it…"
Jan 1, 2014
Larry Grater replied to Ralph Wu's discussion Sending APM to near space and return?
"North Texas Near Space 4 I had lost that link, thanks for posting.  It was interesting to review.   This was posted elsewhere, but thought you might like to see APM at altitude.  Minor SW issues have been corrected for a re-try…"
Jan 1, 2014
Mhmoud Essalah replied to Ralph Wu's discussion Sending APM to near space and return?
"These guys from BC, Canada did it, long before the RCexplorer guy. They may have been the first, even. But here is their website, they seem to have documented their adventures quite well. http://www.canuck-boffin.net/sonde/index.htm We are doing…"
Dec 31, 2013
Andrew Neushul replied to Ralph Wu's discussion Drones Parts from China
"Hi Ralph, I'm using common RC parts for our SwiftBot quadcopter.  This uses 30A SimonK ESCs, 750kV motors, 10x4.5 props, and APM 2.5/2.6, 'DJI' 450mm frame.  What's special about it is the 3D parts and enclosures…"
Nov 20, 2013

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Morli commented on Ralph Wu's blog post MultiWii Mini with DMS2 RX module
"DSM open source ?  Nope,  however Multiwii can use the spectrum RX serial o/p ( connect the spectrum  satellite  rx) directly to it ")"
Jun 5, 2013
Crasher commented on Ralph Wu's blog post MultiWii Mini with DMS2 RX module
"The link states 7.8g, 70g would be one big circuit board!! "
Jun 5, 2013
Ralph Wu posted blog posts
Jun 5, 2013
Sam commented on Ralph Wu's blog post Mini WMC with DMS2 RX module
"sorry newb question. what douse WMC stand for?"
Jun 4, 2013
Hyon Lim commented on Ralph Wu's blog post Mini WMC with DMS2 RX module
"Is the receiver for DSM open source?"
Jun 4, 2013
Steve commented on Ralph Wu's blog post Mini WMC with DMS2 RX module
"WMC? You mean MWC for multiwii?"
Jun 4, 2013
Nigel Cartwright commented on Ralph Wu's blog post Mini WMC with DMS2 RX module
"Interesting, but would be better of the huge pin array was left off, just give us solder holes!"
Jun 4, 2013
Yusuf Pirgali commented on Ralph Wu's blog post Mini WMC with DMS2 RX module
"Very nice, but like Monroe said could you give us more info and details please?"
Jun 4, 2013
RocketMan commented on Ralph Wu's blog post Mini WMC with DMS2 RX module
"Can you give some more details? Looks interesting! Not much detail in the link either."
Jun 4, 2013
Larry Grater replied to Ralph Wu's discussion Sending APM to near space and return?
"The video below link below is interesting because the RC Explorer guys talk about how hard this is and that it took 4 tries to get satisfactory results.  Well, they didn't even scratch the surface.  Here's a link to the post…"
Apr 15, 2013
Eric replied to Ralph Wu's discussion Sending APM to near space and return?
"nice!! any luck with the video?"
Apr 12, 2013

Profile Information

About Me:
I am hobbyist of high tech gadgets and IT professional.
Please tell us a bit about your UAV interest
Aerial photography and LiDAR.
Hometown:
Hong Kong

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Ralph Wu's Blog

MultiWii Mini with DMS2 RX module

Posted on June 4, 2013 at 12:30am 7 Comments

This is a tiny MultiWii FC integrated with 7-Channels DMS2 RX module. Weight is just 70g and it can fit into mini Quad or Hex copters

You can have more details at following link:…

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Quad X FPV Frame for APM 2.0/2.5 board

Posted on February 28, 2013 at 7:16am 2 Comments

A new quad X FPV frame for APM 2.0/2.5 board.…

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Low-price GPS with mount

Posted on January 31, 2013 at 12:00am 4 Comments

A nice low price uBlox GPS with case and mount for $34

http://www.droneasy.com/index.php/electronics/gps-2/ublox-g6010-gps-kit.html

Vortex radio waves could boost wireless capacity “infinitely”

Posted on December 13, 2012 at 4:00am 3 Comments

I am curious about and learning Vortex Maths of Marko Rodin and Double Torus Universe pattern and how they can apply to radio communications and I found someone already did.  Vortex radio waves could boost wireless capacity “infinitely”. Using this method to boost bandwidth of ground station and drone radio communication.

From…

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