About

Gender

Male


Location

Cheltenham, Gloucestershire County


About Me:

Just retired after 38 years in the European defence industry - in antenna research/design and development. Last 10 years with emphasis on research into airborne DSP (digital signal processing) hardware & UWB's (ultra wideband antennas). Final projects prior to retirement: design and development of antennas for the EADS Typhoon and A400M projects. Knowledge of UAV's - limited to negligable I'm afraid, other than for research into antennas for data links. The DIY DRONES website is a great database for homespun & open-source UAV projects and UAV design/development and control - however, when it comes to antenna's, there appears to be a big gap. I'd like to see myself been able to contribute significantly to that side of things. Anyone have any question/s about antenna's - would be happy to comment and share my experience and ideas.


Please tell us a bit about your UAV interest

Have always had an interest in R/C models and model building - but never had much time to pursue the interest. Now have the time to get involved and starting off by getting up to date with the current "state of play" regards R/C & FPV technology.


Hometown:

Cheltenham


Activity Feed

Patrick Hammer replied to Patrick Hammer's discussion ONBOARD AVOIDANCE RADAR - NOW POSSIBLE?
"Marine Radar and 7.4 kg, not for UAV usage - issues regards certification?
That will be an obstacle to be overcome and I haven't a clue what would need to be satisfied. I doubt NAVICO would support "hacking" their product for such an application so…"
Nov 14, 2010
Patrick Hammer posted a discussion
A long standing issue flying RC/UAV models in so-called “commercial airspace” has been the issue of safety associated with “situational awareness” i.e the ability of an  RC/UAV model to unilaterally institute an “avoidance procedure”. Till that…
Nov 14, 2010
Patrick Hammer commented on Earl's blog post The perfect anti-vibration foam
"I don't think it was ever decided 100% one way or the other what "killed Columbia" i.e. foam, or foam & ice, or just ice, or a heat resitant tile. The jury is still out. In any event it wasn't Sorbathane - there is none on the outside of the…"
Oct 6, 2010
Patrick Hammer replied to Gerard Lavoie's discussion Sub meter accuracy for the Arducopter GPS?
"Gerard

If you read the notes at the end of all the marketing blurb - and it becomes clear that the sub-meter accuracy referred to is subject to certain conditions - as it is with most modern day GPS modules with half decent firmware and onboard…"
Oct 6, 2010
Patrick Hammer commented on Earl's blog post The perfect anti-vibration foam
"As others have already said - Sorbathan: used tons of the stuff at work over the years.

Good enough for Nasa cameras on the shuttle, should be good enough for RC models."
Oct 6, 2010
Patrick Hammer commented on Mario's blog post I was already crazy...DIYDRONES made it worst ! The story...part 2
"Mario

Brilliant - you not a little worried about the gear noise (?) - what material have you hobb'd the gears out of??

Meldin 5000 (engineering plastic) - great for small gears"
Oct 1, 2010
Patrick Hammer replied to Roberto Hawkowski's discussion High definition FPV
"For those interested - a hack for live video output (read “live” to mean “low latency” in reality) for the HD HERO already exists – done by my son and a university collegue of his - via a USB.2 extension cable/adaptor plugged into the SD card…"
Sep 25, 2010
Patrick Hammer posted a discussion
A note regards IR cameras .........IR cams are not cheap pieces of hardware – usually beyond the budget of DIY’ers and hobby flyers – or, need they be?Most IR cams are sold through resellers i.e. companies that have nothing to do with the production…
Sep 12, 2010
Patrick Hammer commented on Taylor Cox's blog post Gopro.com>>> Full HD super widescreen camera that is mountable just about anywhere
"Ray

The clue is in the bold underlined writing at the bottom of the posting, just above yours - got it????"
Sep 10, 2010
Patrick Hammer commented on Chris Anderson's blog post Apple bans iPhone drones
"Apple is stopping the Apple store from been used as a distrabution hub for certain kinds of apps - but there is nothing to stop "Apps that use location-based APIs for automatic or autonomous control of vehicles, aircraft, or other devices" been…"
Sep 10, 2010
Patrick Hammer commented on Taylor Cox's blog post Gopro.com>>> Full HD super widescreen camera that is mountable just about anywhere
"Pauli

The USB port is certainly fast enough, and in theory yes I guess it could be used, but it would have to be a braver man than me to undertake all the hardware surgery involved in connecting up the internal SD wiring to the USB port. Anyhow,…"
Sep 10, 2010
Patrick Hammer commented on Chris Anderson's blog post DIYDrones at 11,000 members
"Lets be under no illusion just how much time is involved in setting up and then maintaining a website such as this - well done, Chris"
Sep 10, 2010
Patrick Hammer commented on Taylor Cox's blog post Gopro.com>>> Full HD super widescreen camera that is mountable just about anywhere
"Oh - foirgot to add: at what cost?

Well, the Hero video camera comes with H.264 encoding - all you got to do is modulate the signal and transmit it - which is exactly what you have to do with an analog signal as well."
Sep 8, 2010
Patrick Hammer commented on Taylor Cox's blog post Gopro.com>>> Full HD super widescreen camera that is mountable just about anywhere
""we use analog...."


Hang on sec, Jani - you asked me a tech question i.e. why use H.264?

By all means use analoge, but for what it worth you'll get a better picture over a greater distance for the same Tx power and with less bandwidth useage (and…"
Sep 8, 2010
Patrick Hammer commented on Taylor Cox's blog post Gopro.com>>> Full HD super widescreen camera that is mountable just about anywhere
"Jani

Why H.264?

A live H.264 encoded video stream requires siginifcantly less bandwidth when transmitted from a model plane down to a ground station than will the same video at the same resolution encoded with MPEG2.

In short: that means better…"
Sep 8, 2010
Patrick Hammer commented on Taylor Cox's blog post Gopro.com>>> Full HD super widescreen camera that is mountable just about anywhere
"For what if worth - eyeofmine.com (0n the webpage noted below) have played quite a bit with this HD Naked and have developed a number of add-on options to include live video output and wireless kits, as well as a few correctional filter kits…"
Sep 8, 2010
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