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12-13-2013 01:06 PM
Fuzzydog
Re: Tracking a missing plane

the BigRedBee trackers seem like they would work really well - thanks for posting up that link. Initial cost is somewhat high but when I add up the cost of everything on my plane.....it would be cheap insurance.
12-13-2013 12:37 PM
martinic
Re: Tracking a missing plane

A lost model alarm is, I think, the cheapest option and one I use on all my aircraft. I use a passive one so that it woks with failsafe receivers. This is the one that I use (10 minute option).

From experience (Here's my story, see post 93 for all sorts of links), I don't use just one method, but rather multiple ones. I also make sure at least one of the methods on each aircraft is standalone powered, in case the flight pack ejects or becomes disconnected.

If flying FPV, your video system is your first (no additional cost) option. If it survives intact and is operable post-crash, then you can shield the antenna from a portable ground station using your body while yoyu slowly turn. When there is a blip on the signal, the bearing to the aircraft is directly behind you (your body blocks the signal). This works well if your video system is functioning, but that is often not the case.

I mainly rely on an OSD with GPS and a groundstation recorder (DVR). As long as I remember to start the recording, the video signal showing the GPS coordinates is recorded.

I currently use:
The video system
Lost model alarm
Loc8tor (self-powered)
FMKit UHF Tracker (self-powered). Requires a compatible receiver and possibly a directional, high gain antenna.
High intensity strobes (Strobon, from Flytron hobbies).

Note that the Loc8tor can be used with a parabolic reflector to work at fairly long ranges. Here`s a nice video showing comparing the performance of the Loc8tor and the FMKit UHF tracker using good antennae.

Here are some other good systems that others have tested and used with success.
Marco Polo
The Plane Locator

There are many, many ways to locate lost airplanes/multicopters, but they have different capabilities and limitations, some are harder to setup and use than others, and the cost varies quite a bit.
12-13-2013 11:37 AM
CF105
Re: Tracking a missing plane

But rugged. I've seen one of the 70cm units free-fall from over a mile and remain functional. More than I can say for the rocket that put it up there...
12-13-2013 05:43 AM
davidmc36
Re: Tracking a missing plane

Quote:
Originally Posted by Pauld View Post
Can't find the. Damn email though......

PaulD
Not Italian, but expensive.

http://www.bigredbee.com/zc139/
12-12-2013 11:54 PM
Pauld
Re: Tracking a missing plane

A couple of months ago I got an email from I believe an Italian company that was introducing a new range/direction finder system for r/c aircraft. Seem to recall it cost about 300 bucks for a tx/rcvr set and then another 80 bucks for additional transmitters. The Tx's looked about the size of a r/c reciever and had phenomenal range.

Can't find the. Damn email though......

PaulD
12-12-2013 09:19 PM
bcsaltchucker
Re: Tracking a missing plane

If you put FPV on the aircraft, and if the power stays on to the FPV, then you can use your FPV ground kit to locate downed craft. A directional antenna will do it, or even an omni using your body to block the signal from certain angles. I have done this many times, usually using the all-in-one goggles with the built in receiver to find where I landed my quad. Just turn my head to see which way the signal is blocked and which way the signal is clear.

other kinds of telemetry can be used. On some of my aircraft, the GPS coords are transmitted and recorded all the time on the ground station DVR. Also also on a dedicated GPS coord display. If the plane goes down, I just review the video, or look at the coord display which keeps the last known coords. Have never needed to use this however I am mortal and expect I will need it some day.

Can add a parabolic reflector to te Loc8tor and make it work for many km range
12-12-2013 05:36 PM
CF105
Re: Tracking a missing plane

For finding wayward rockets, I've been using GPS units made by Big Red Bee. They have three versions of their "Beeline" transmitters, two require a ham radio license (70cm and 2m bands) but there is also one that does not (operates in the 900 MHz range). No reason they wouldn't work for this purpose.
12-12-2013 04:09 PM
Carlisler
Re: Tracking a missing plane

......
12-12-2013 03:59 PM
Carlisler
Re: Tracking a missing plane

Quote:
Originally Posted by dashpuppy View Post
Oh a quad that might be heavy / big. ... whatcha think ?
yeah probably a bit big for a small regular field quad.

for an fpv plane, or that monster multi-copter I saw the other day (6 or , I would think it would be good insurance.
12-12-2013 03:35 PM
dashpuppy
Re: Tracking a missing plane

Quote:
Originally Posted by Carlisler View Post
Judging by the size of the referenced 'hockey puck's, not really. same same
Oh a quad that might be heavy / big. But on a snowmobile or in your snow suit might not be... whatcha think ?
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