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Messages - IceWind

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FPV / Tcoptor

« on: June 14, 2011, 14:08:29 PM »

Well that is usually the problem.
Better gear cost more and on these machines is always x3 or x4 or even more.

I have a firiend using CC ESC's and Axi motors (deluxe gear)

He had some issues initially to set the ESC's throttle range but after exchanging some tips he's now flying it perfectly.
I believe it was due to the CC ESC's feature that syncs up the throtle range.

If you have that gear available definetly use it with the MWC (wii board).
That one can handle 400hz update rates and should make the motors run really smooth. Unfortunalty you're not close if not I'd let you have a go on my MWC so you could feel the difference.

Regarding the ESC's most like me use the Turnigy Plush ESC's because over tests those were the ones that performed better in regards to response and smoothness of the throtle range.
But I'd go for CC as well if it wasn't so pricey.

FPV / Tcoptor

« on: June 14, 2011, 00:21:06 AM »

oh yeah. These babies end up eating alot of mah's.
I'm using 1200kv with a total avg consumption of 24-32A's.
It is quite common when the LiPo starts to be discharged that the copter stops to respond properly. Usually noticeable when one or more motors need to rev up to compensate some sudden movement and they simply don't. I've let mine go doewn
a few times due to that. Now I time the usage in 6 -7min for the 2200mah packs.

Back on the prop size, it is interesting because new theories show up all the time.
I've read both, an in all cases they always provide some benefits.
For example bigger props, require less rotation for the same amount of lift and so it produces less vibrations.

In my opinion in this "game" of trying and getting better response from the motors there is a clear winner and that is the i2c ESC's. Much faster updates and better throttle resolution..
But those are expensive and for just playing around the normal ones work perfectly fine.
I recall some tests comparing motors response times and the big factor was the ESC and how fast it would react to changes in control.

FPV / Tcoptor

« on: June 10, 2011, 23:07:53 PM »

I'd say you're already progressing.
Nice flying you already mastered it.

Sorry then, I didn't knew you plan was to do FPV with a plane.

I use goggles, I've been working to hack the MultiWii code to feed sensor data into my OSD to show a Virtual Horizon. That will help to identify the tricopter flying attitude.

Btw, for the owners of the PhoenixRC simulator and that want to try to fly a quadrocopter that is already possible. The last update adds the Gaui 330x.

FPV / Tcoptor

« on: June 09, 2011, 15:15:22 PM »

Hi Richard,

Correct me If I'm wrong but you seem to be using a controller board based on the KKapteinKuk's design on that t-copter.
Despite it may be a interesting board for normal flying and some acrobatics it may be a bot tricky for FPV.
The reason is that you'll want (at least on the beginning) some auto-level features and for that it needs accelerometers.

Almost all of the people I know doing FPV with multicopters are using the Multiwii board because of that. I also use it and the tests I've been doing with FPV when perfectly fine (even when inside a car park) due to the high stability of the board and auto-level features.

As for Sony Vegas I'd start with the requirements specs and at least double them:

Vegas Pro 10 system requirements

Microsoft® Windows® XP 32-bit SP3, Windows Vista® 32-bit or 64-bit SP2, or Windows 7 32-bit or 64-bit
2 GHz processor (multicore or multiprocessor CPU recommended for HD or stereoscopic 3D)
400 MB hard-disk space for program installation
1 GB RAM (2 GB recommended)

You'll want lots of RAM. I can't even understand why they say 1GB.... with that unless is XP, not even Windows will runs fine.

FPV / Re: Radio and video sending

« on: May 19, 2011, 10:57:58 AM »

Quote from: "zg3409"

Hi,

I have read with interest the messages so far. I have an amateur radio licence and I have been involved in sending TV pictures for 10 years.

From a techical point of view

1249Mhz transmitters are illegal in Ireland and we use 1240 -1300 (and received up to 1320) in Ireland so you will interfere with us! We report interference and can track down messers. We have already has to report and remove illegal commercial security cameras from our allocation.

MPT1349 (probably comreg typo) is actually on 1394Mhz and it seems to be exempt up to 500mW (this is a lot of power for a model aircraft)

See:
http://www.sourcesecurity.com/docs/fullspec/ACFA94.pdf

and
http://www.icecom.is/gogn/18931003.pdf

Generally I would not really advise it for your use as there may be high power users in every city which could cause interference. Generally the 5.8GHz stuff is better but is more expensive. A good camera is very important also.

We have a website with info (not 100% up to date)
http://www.iatc.ie

and there are people involved in Dublin, Cavan, Waterford and Cork. We mainly have equipment at the top of mountains which listens for a TV signal, then re-broadcasts this on a different channel.

For your use I would also suggest using directional receive aerials on the ground end as these are perfectly legal and can help the signal. The down side is someone needs to point the thing.

I am available to offer advice, give help and demo gear if needed. There is lots of good and bad gear out there so ask somone for advice. I aI (along with others) are working on text overlay on the video so you can ddiaply things like altidue, position (from GPS) and time/date etx. We are also conidering auutomous flight in the future (pilotless) I live in Bray Co Wicklow, so we can meet.

We have very high power transmitters and very, very sensitive receivers. I am also working on digital TV transmitters. These would be more useful for semi professional use or from a full size glider to ground. We can use them "aeronautical mobile" and you will hear a hot air balloon on our frequencies from time to time. The legal aspect is to stop interference with other users and your own aircrafts equipment.

Regarding cost we normally build our own stuff, or modify off the shelf gear. It's only a hobby after all.

Dan 087-7731120
Bray, Co Wicklow

Hi Dan,

Great to see more people involved in these projects in IE.

One question, have you considered "inejecting" the "text" into the video stream but using the method used by the broadcast teletext? (vertical blanking interval )

I've been trying to find other ways to have telemetry without using a extra downlink or by extracting data from the video overlay.

Nando

Slope Soaring / /!\ PLEASE READ IF YOU ARE A TOPMODEL CUSTOMER

« on: May 09, 2011, 00:53:34 AM »

Thanks for que warning Fred.
I'm not a custommer from TopModel (at least recently, last time was years ago) but I've spread the word to Portugal.

As for CC refunds, and unfortunatly I know this, with banks in Portugal they ask to fill a claim form for every transation made and after they'll refund you but takes some time.

FPV / FPV video

« on: April 20, 2011, 20:27:19 PM »

You;re using a Youtube URL formated for mobile.
Use this one instead: http://www.youtube.com/watch?v=Esdkwz4u31M

[youtube]http://www.youtube.com/v/Esdkwz4u31M[/youtube]