|Jan 09, 2013, 11:01 AM|
Building a FPV QuadCopter -- Need help suggestions
Hello RCG and MultiRotor Gurus
I’ve just been getting into QuadCopters over the past couple months and I’m fully blown away at the capabilities of these flying contraptions. My first quadcopter was the Traxxas QR-1 and as soon as I got that in, I was hooked! I wanted to go bigger so I asked around the forum and did quite a bit of reading and decided on the Kickstarter kit from SkullCopter.com. The main reason I went with that quad was for a couple simple reasons. First being my buddy, here on base, suggested to get a quad with DJI arms as they are many, many kits out there and are pretty cheap to replace. The other reason is I got into contact with Matt from SkullCopter and we talked several times before I finally made my mind up. Not once did I feel like I was pressured to buy his kit but in the end, he was always ready to answer my questions regardless if it was his or another’s kit I was asking about. Anyway, I liked the MultiWii Pro 2.0 board it came with and so I went his route and have been loving every minute of it.
So, this brings me to the reason I’m posting this up. I’m ready to start checking out FPV and I really think my brain is about to explode with all the info I’ve been reading up on so I wanted to get some of you guys that have gobs of experience to chime in and see how I’m doing with my selections.
Here’s what I have on hand and what I’m planning to buy over the next couple months. Before I get started, let me tell you what my ultimate goal is and why.
I live in Tehachapi, Ca. It’s half way between the base that I’m stationed at, Edwards AFB, and Bakersfield, Ca. They call it the Land of Four Seasons and for good reason. It’s surrounded by lots of desert type area and around here, it’s considered a beautiful area and is nothing but mountains and hills! I want to be able to take out the FPV quadcopter and fly for about 5-10 miles into the mountains. I understand a lot of this is limited by the radio system and FPV equipment but that’s why I’m posting this thread, I want to get your thoughts and suggestions.
Here’s what I have on hand to start the build:
SkullCopter MultiWii Pro 2.0 (Thanks Matt)
Spare DJI arms
Bluetooth Module from BlueskyRC.com (Thanks David)
GoPro Hero 2
UBlox 6m GPS
Here’s what I’m thinking of getting and please, any suggestions or experience, please share:
FPV SpiderQuad with Gimbal from ValueHobby.com
900mhz 1000mW transmitter/rcvr combo from futurehobbies.com I’ve heard that 1000mW is overkill but I’ll be flying around hills and mountains and for $127, I’m thinking this should be okay. Any downsides????
900mhz antenna from Future Hobbies
EZUHF system from ReadymadeRC.com
I think that’s the bulk of the items I’m looking at getting. I’m looking for input on all the above items as well as suggestions for ESCs and motors. I’m thinking motors in the 850-900KV range as well as some SimonK 30A ESCs????
Thanks for all your help and I’ll update this thread as I make orders and start getting products in.
|Jan 09, 2013, 01:58 PM|
Joined Feb 2012
900mhz travels the farthest and penetrates objects the best hence its use in mobile phones. 1000mW could very well be too much, swamping the signals needed for RC control is the worry there . You have a transmitter and a receiver on the model the RC Control is receiving on the model and the video is transmitting on the model and if the video transmitter is putting out too much power your RC receiver may lose range. Your better off putting your efforts into the receiver end of things by looking into different types of antenna on the video receiver. 300-600mW for your video transmitter is plenty for most needs, for long range you need patch antennas or helical antennas and or antenna tracker systems like this one http://www.foxtechfpv.com/index.php?...index&cPath=54 Theres a ton of options for improving range on the video transmission without the brute force method of more power more power , this isn't "Tool Time"
|Jan 09, 2013, 02:12 PM|
Thank you for your input Steve! Seriously, I've been asking a few people and you are the first to point out some of the downsides to having a 1000mW video transmitter. Man, I'm so greatful for your input, it really clears a lot of things up for me and makes perfect sense.
So, I found on ReadymadeRC.com, the 500mW 900mhz transmitter and rcvr. Looks like I'll save a couple $$ if I stay around the 500-600mW range too.
The atenna I linked to above, are they pretty good to get me the range I'm looking for?
|Jan 10, 2013, 06:09 AM|
Hey sboti74, you wrote that you want to fly fpv for 5-10 miles, but that's not possible with the flight times of a multirotor, that is the first limitation, if you want to fly 5-10 miles you should go for a plane.
A fpv quadrocopters flight time is 20min at really maximum, and you can't do any 5 miles and come back in 15-20mins.
|Jan 10, 2013, 10:16 AM|
Crap..... How did that slip past my thinking process?? Alright, I'll be going back and editing my first post.... Let's say maximum 5 miles then. That could be feasable if I can get the electronics worked out correctly??? With the right motors, props ESCs, and around a 5000mah to 6000mah I might be able to get away with it you think?
So lets say I want to be able to carry a 6000mah 3S1P battery, I'm going to have to beef up my motors and ESCs to carry the extra weight right? So do you guys think 900ish KV motors with 10" props with 30A ESCs would be able to get the job done and give me around 20 minute flight times? I'm also planning to run a really small 600-800mah 3s with voltage regulator for the electronics and FPV equipement...
And thank you guys again for your inputs.
|Feb 24, 2013, 12:07 AM|
Joined Apr 2012
20 min flight time for quads is usually hover/ unloaded. like thats non fpv loaded, pushing it in fast forward flight to get the thing to cover all those miles you want todo, if you want distance id go with wing (i prefer mini wings since im in a urban area) or a slow flyer plane with a pusher in the back for clear view. realistically, your going to need your LR gear for planes and less likely for copters, due to your flight time, and it just isnt effiecient to cover distances, i use my copter for close stuff or stuff that changes motion (motorcycles, birds, downhill mountain bikers) and long distance like mountain or fast chase to the fixed wing fpvs, and i use my long range gear on the fixed wings and keep the simple 2.4 and 5.8 for my copters usually
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