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Old Mar 25, 2011, 12:53 AM
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R/C 2.4Ghz pushed to 20km

This is what a Maxi swift loaded with 10Ah and a lot of help from onboard electronics can do:

RVOSD5+FRsky+amplifier+patch, 20km (6 min 14 sec)
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Old Mar 25, 2011, 01:17 AM
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excellent, is that a world record for a 2.4ghz rc system?
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Old Mar 25, 2011, 01:24 AM
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How much power in the booster? What gain on the R/C Tx antenna?

ian
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Old Mar 25, 2011, 01:25 AM
It's pronounced Caveman...
Reno, NV
Joined Nov 2009
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Awesome. What patch antenna did you use? Was it
http://www.rangevideo.com/index.php?...1fdb96eb322964
?

Also, I'm curious as to how much you adjusted the antenna during flight. It seems like after 15km your RC went down pretty rapidly, but then at 18km your signal became stronger again. If it is indeed that sensitive to your direction, then I can only imagine how helpful having waypoints would be.
Also, when did you start getting alarms on the built-in telemetry alerts and have you adjusted them?
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Old Mar 25, 2011, 01:42 AM
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1Watt booster. I was testing a 10dBi home made antenna. However I tested the RV patch to 10Km with the booster and signal was still strong. Unfortunately I didn't had the signal quality indicator on that test.
Next time i go flying will test the limit of the RV patch. Note that I don't think that it is safe to go so far like I did in this video. Unless you have an autopilot on-board.
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Old Mar 25, 2011, 01:50 AM
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Quote:
Also, I'm curious as to how much you adjusted the antenna during flight. It seems like after 15km your RC went down pretty rapidly, but then at 18km your signal became stronger again. If it is indeed that sensitive to your direction, then I can only imagine how helpful having waypoints would be.
Also, when did you start getting alarms on the built-in telemetry alerts and have you adjusted them?
I was changing the antenna direction to get some understanding of the radiation lobe of the antenna. One interesting thing I found is that beyond 10km I had better signal if I point the antenna searching the reflection from ground and not pointing the antenna to the airplane.
The FRsky module I use has no telemetry.
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Old Mar 25, 2011, 04:03 AM
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Excellent flight, well done, the batteries were on their last legs at the end there, you could not have timed it better

Mark
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Old Mar 25, 2011, 04:13 AM
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Alex was always the best
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Old Mar 25, 2011, 06:08 AM
Questionable judgement
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I love to see the engineers get out and fly. Good job showing us how it's done.
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Old Mar 25, 2011, 06:41 AM
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Absolutely awesome Alex, you have to love the Maxi Swift for LR flights.
I love the Landing Gear Down indicator on the OSD is that available for us mortals?
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Old Mar 25, 2011, 06:48 AM
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Originally Posted by Tarro View Post
Absolutely awesome Alex, you have to love the Maxi Swift for LR flights.
I love the Landing Gear Down indicator on the OSD is that available for us mortals?
Yes this is a nice feature!!
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Old Mar 25, 2011, 07:11 AM
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Great video the whole way!

What is the vid setup?
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Old Mar 25, 2011, 08:07 AM
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Nice Job!
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Old Mar 25, 2011, 08:44 AM
BEOWULF
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cool video
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Old Mar 25, 2011, 09:36 AM
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Nice video.

what video TX are you using?
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