About

Gender

Male


Please tell us a bit about your UAV interest

Not have a UAV,.... yet.


Hometown:

Hong Kong


Activity Feed

Johnny Yu replied to Eric Kut's discussion airspeed sensor vs rain/mist/cloud
"That's why we have pilots. "
Nov 20, 2013
Johnny Yu replied to Earl's discussion Quad to a Tri ??
"No. 

A Tri-copter need a tilt-rotor mechanism."
Apr 17, 2013
Johnny Yu replied to Austin Chapman's discussion List of tested/working transmitters with Arducopter
"My Devo 10 works perfectly with APM 2. "
Oct 9, 2012
Johnny Yu commented on lot's blog post Quad copter flying for 4-8 hours
"I think 4-8hrs should be possible in future, there are some very exciting battery technology in development. Lithium-Sulphur battery have double the energy per weight of the current LIPOs. Given that the current record of flight time is around one…"
Sep 3, 2012
Johnny Yu replied to Eyeindasky's discussion Anyone ever though of a rx base autopilot
"But u lose a lot flexibility."
Aug 13, 2012
Johnny Yu commented on Alexander LeBrun's blog post ArduPilot Purple + Skywalker X8 + FPV = Summer Loving
"Anyone tried enlarging the control surface?"
Aug 12, 2012
Johnny Yu commented on Chris Anderson's blog post Walkera Ladybird nanocopter clone for $49 with RC!
"oic, but it seems that some sellers on that site just call it "APM" or "APM 2". Is that ok?"
Aug 10, 2012
Johnny Yu commented on Chris Anderson's blog post Walkera Ladybird nanocopter clone for $49 with RC!
"@Rana
www.taobao.com (currency in RMB)
Actually all RC part are very cheap selling on this site. I guess it is most probably the cheapest in the world. Actually you can find 3dr Radio, ESCs, Sonars, uBlox GPS etc.... in very very good price.
For the…"
Aug 10, 2012
Johnny Yu commented on Chris Anderson's blog post Walkera Ladybird nanocopter clone for $49 with RC!
"Actually APM 2 clone is selling at ~US$80 in China."
Aug 9, 2012
Johnny Yu replied to Olivier Fontaine's discussion Hight altitude (between 2000m and 4000m ??? Thrust, lift force, witch motor, battery and propeller ??? in ArduCopter User Group
"Have your tried using a bigger prop like 14"? 

Anyway, this calc might help:
http://www.ecalc.ch/xcoptercalc_e.htm"
Jul 17, 2012