Assuming there are no legal restrictions, what frequency is best for long distance flight (80km)?
So, I live in a country without much legal restriction on radio frequencies and am planning to run 80-100km surveillance flights.
Looking at a this plane http://www.fpvflying.com/products/Mugin-2600-UAV-FPV-platform.html with a gas engine. APM 2.5.
So, what's the best frequency to use?
And for that distance, what type of antenna/transmitter/receiver would be needed?
Replies
Interesting thought there Joe, but I'm not sure how many elephants there would be in Syria - taking his location on face value.
I'm not one for playing guessing games about what someone's intentions or why they're asking questions. It is an interesting question however and I was wondering about this myself seeing Australia is so large and mobile phone coverage doesn't exist throughout the outback. There have been a few suggestions put forward so it's probably about time to wrap this thread up.
Suav, I ask that you please close this thread. If you have any concerns with that, please request me as a friend and we can have a chat.
This thread will be heavily moderated until closed.
sounds very suspicious, very much like something a poacher would be looking for
mmm... i was thinking besides a longer range, can we get better image quality
Drop me a pm?
Unless you are planning to FPV for some challenge once or twice , then by all means use what ever you have found so far. All these are hobby grade stuff when lost ,not much to cry about. But for professional grade performance and consistency , you need every component to be bullet proof and that translates to $$$. Think of satellite link. For quality surveillance video you need to fly low , else very high grade video equipments are in order. Other complexities are not mentioned here.
Now coming back to +100k.m FPV, most of such adventure are done with mountain being point of launch( Home)or sea shore. This is to over come the hurdle of LOS ( which is approx 30 Miles from surface to surface on earth). If not then you choose 1:10 ratio which means 1k.m =33k" altitude for 100k.m ( which If I am not wrong then you are going into aviation altitudes which your local regulations has not much to say). You have interface with local aviation authorities for NOTAM every time you take off.
Now coming back to Comm freq choices, lower freq offers you non-LOS capabilities. Think about it. Trust me almost every one of us here fantasies atleast once( if not more) to do such flights. Mugin is my choice of airframe too to keep $ cost low.
This guy made more than 130km with standard Dragon Link LRS (433mhz) with some yagi antenna for the radio TX, and a 1.2ghz 1.5w chinese video tx with home made antennas on the TX and RX side (and some DirectTV spare parts!).
http://www.foro-aeromodelismo.com/viewtopic.php?f=93&t=24552#p2...
He designed the plane, is equiped with a gas engine and he used around 1/2 galon of fuel for the round trip.
hello
read this thread http://www.rangevideo.com/forum/showthread.php?2547-The-QueenBee-an...
for exact specification for solid video link to upto 80 - 120km range. this person did it using electric wing.
https://www.youtube.com/watch?v=TfDfkjGNWSQ
Might be worth contacting the guys at RF Designs in Australia. They do custom jobs and are really good at what they do. I'm sure they would like to help.
http://www.rfdesign.com.au/
I have a feeling you are going to have to be more specific about your actually goals and your experience level with RC planes if you want people to help you out. The need to fly 80-100km is a little odd and pretending to look for elephants doesn't exactly instill trust. I'm not trying to be rude or judging, but I started to write some suggestions and then I started to wonder... what is this guy really trying to do??
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