Discussion: Antenna position
#26
See post #2.
Glad that you did not lose your plane!
This is a link to a pretty good and relevant article. https://www.rchelicopterfun.com/rc-antenna.html
Key takeaways from article relative to this discussion ..
(I would have swapped the red and green to show the tip of the antenna as red, but you get the point.)
In short, our RF link will be:
Glad that you did not lose your plane!
This is a link to a pretty good and relevant article. https://www.rchelicopterfun.com/rc-antenna.html
Key takeaways from article relative to this discussion ..
(I would have swapped the red and green to show the tip of the antenna as red, but you get the point.)
In short, our RF link will be:
- Strongest when both the Radio & Receiver antennas are parallel to each other.
- Weaker when they are perpendicular to each other.
- Very weak when pointed ends on, directly at each other.
The Weatronics system was/is highly regarded for its robust Rf performance Using patches on the tx and later on receivers..Using the data recording facility, LQI, etc of the Weatronics I extensively tested one patch on a Gizmo rx with the other antenna just the monopole. The patch produced significantly better results. I have examined the recorded data of well over 1000 Turbine flights, never a single problem recorded or experienced, I know they work, empirical data confirms it.
Although I have the highest regards for Jeti ( which I would have bought jf Core had not arrived) arguably the current. state of the art radio is the PowerBox Core much of which is based on Weatronics , ( which company was bought by PPB after the death of the Wea owner) and which uses dual patch antennae.
So, I wonder, why Futaba etc have not switched to patches which clearly improve both range whilst removing that cone of silence as well as being physically more robust. the Core using the handle to house the patches
Last edited by David Gladwin; 06-27-2020 at 12:58 AM.
#27
My Feedback: (4)
Antennas next to fuel is bad. Another reason I don't run Futaba, only two receiver antennas(again, unless you want two receivers). Best to AT LEAST cover the X, Y, and Z axis. With Futaba you can only cover two, and you only have one TX antenna
Last edited by bodywerks; 06-27-2020 at 01:15 AM.
#29
My Feedback: (7)
Not sure how much impact fuel has on reception but it's always been one of the things I avoid. I wouldn't run that lead right between the tank and header like that. I'd suggest doing something like relocating the receiver slightly to one side and running 1 antenna as close to vertical as possible up that bulk head you have it zip ties to and the other (between the tanks) I would flip 180 degrees and lay it horizontal on the platform the rx is mounted on near the opposite edge near where the air connector is laying.. Of course this suggestion is based on just a photo of 1 small portion of the airplane so it may not be great either.
Things I avoid, fuel tanks, electronics, metal, carbon fiber. I simply try to get them 90 degrees apart and as far a part as possible. I also try to visualize the model from different angles and see if I think any of the things I mentions above can get into a position where they can get between the transmitter and both antennas. I find that keeping them as far a part as possible helps reduce the possibility of both antennas being shadowed by any single object in the airplane.
Things I avoid, fuel tanks, electronics, metal, carbon fiber. I simply try to get them 90 degrees apart and as far a part as possible. I also try to visualize the model from different angles and see if I think any of the things I mentions above can get into a position where they can get between the transmitter and both antennas. I find that keeping them as far a part as possible helps reduce the possibility of both antennas being shadowed by any single object in the airplane.
Last edited by wfield0455; 06-27-2020 at 05:00 AM.
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CraigG (06-28-2020)
#39
My Feedback: (3)
Excellent choice. There is suppose to be a Gen 2 of the DS-16 coming out soon so don’t know if you were aware of that or not.
Danny Melnik at AeroPanda is super friendly, very knowledgeable, and helpful. I would suggest giving him a call if you have not already purchased it.
Check out the videos that HarryC did on YouTube. Also very very helpful.
JS
Danny Melnik at AeroPanda is super friendly, very knowledgeable, and helpful. I would suggest giving him a call if you have not already purchased it.
Check out the videos that HarryC did on YouTube. Also very very helpful.
JS
#40
Thread Starter
My Feedback: (7)
Thanks, good to know, yeah! Raffy will stab me in the back if I buy another Futaba good thing is he flies Jeti, he can answer my questions regarding the programs, I will give Danny a call soon and will also watch the vids.
Flying my Boomer on Fri, this time with the antenna up.
Flying my Boomer on Fri, this time with the antenna up.
Last edited by CARS II; 06-28-2020 at 03:20 PM.
#41
My Feedback: (3)
Good luck...hope all goes well! Give us a flight report!
Always good to have a buddy with the same system to bounce ideas off of locally.
You’ll quickly love the Jeti system!
JS
Always good to have a buddy with the same system to bounce ideas off of locally.
You’ll quickly love the Jeti system!
JS
Thanks, good to know, yeah! Raffy will stab me in the back if I buy another Futaba good thing is he flies Jeti, he can answer my questions regarding the programs, I will give Danny a call soon and will also watch the vids.
Flying my Boomer on Fri, this time with the antenna up.
Flying my Boomer on Fri, this time with the antenna up.
#42
Senior Member
Carlos/Dom, this is the antenna position I've been flying with my 18MZ for the past eight years and never had a FS in the air. Now ground range with Futaba is another story. If you go long on takeoff or landing, you may have a FS.
#43
My Feedback: (3)
I guess that can happen with any system.
I like to position an antenna as high as possible in my jets to try and avoid this as well as to provide good antenna diversity/orientation to the Tx. In the pic below you can see my primary Rx antennas are on a mast that extends to the highest point of the canopy.
JS
I like to position an antenna as high as possible in my jets to try and avoid this as well as to provide good antenna diversity/orientation to the Tx. In the pic below you can see my primary Rx antennas are on a mast that extends to the highest point of the canopy.
JS
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bodywerks (06-28-2020)
#44
My Feedback: (2)
Just curious what's other peoples thoughts on the Spektrum AR12 and AR20310T receivers with 3 remote receivers?, while I think Spektrum are going down the road of "gimmicky features" that personally don't use or see a need, but I've yet to run into any big issues with losing signal with them. There in my 3 Bandits, BVM Rafale and when I get my Ultra Bandit Evo I will also have installed. I like the remote receivers, I have them placed within the various sections of the airframe away from servo leads or any carbon, I've used them with the iX12 and now the iX20 and yet to have an issue.
#45
My Feedback: (3)
In my opinion, regardless of brand path diversity is a good thing.
You can then use the data for each Rx during range check and initial flights to confirm each Rx position is optimized.
JS
You can then use the data for each Rx during range check and initial flights to confirm each Rx position is optimized.
JS
Just curious what's other peoples thoughts on the Spektrum AR12 and AR20310T receivers with 3 remote receivers?, while I think Spektrum are going down the road of "gimmicky features" that personally don't use or see a need, but I've yet to run into any big issues with losing signal with them. There in my 3 Bandits, BVM Rafale and when I get my Ultra Bandit Evo I will also have installed. I like the remote receivers, I have them placed within the various sections of the airframe away from servo leads or any carbon, I've used them with the iX12 and now the iX20 and yet to have an issue.
#46
My Feedback: (4)
Just curious what's other peoples thoughts on the Spektrum AR12 and AR20310T receivers with 3 remote receivers?, while I think Spektrum are going down the road of "gimmicky features" that personally don't use or see a need, but I've yet to run into any big issues with losing signal with them. There in my 3 Bandits, BVM Rafale and when I get my Ultra Bandit Evo I will also have installed. I like the remote receivers, I have them placed within the various sections of the airframe away from servo leads or any carbon, I've used them with the iX12 and now the iX20 and yet to have an issue.
#47
My Feedback: (2)
Sorry I should of been more clear I was referring more to the Android OS features for the iX12/20 radios, nearly all my jets have the AS3000 which I find as simple as it can get but very effective and useful and which huge plus. I will try the cortex pro gyro very soon and I have always wondered how it compares to the AS3000 for simple gyro functions. As for telemetry, I'm focused on watching my jet than looking down at a screen that's glared out due the sun lol .. yes you do have a voice option but I don't really use it.
#48
Thread Starter
My Feedback: (7)
I had a chance to play and learn a DX18QQ with a AR12310T, lots if nice fixtures on this receiver and radio that I could use that my Futaba doesn't have, it was installed on a King Cat I refurbish some 6 months ago, the remote antennas were located around the fuselage to have a complete signal coverage plus the two receiver antennas, no way that receiver can miss a signal from the radio, after I was done with the install I decided that I liked the 18X way better than my Futaba but I had used Spectrum before and decided not to use it again, the Jeti brand had been in my mind for some time now, Raffy was the little push I needed to make up my mind to get one.
Last edited by CARS II; 06-28-2020 at 08:50 PM.
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bodywerks (06-29-2020)
#50
My Feedback: (4)
Sorry I should of been more clear I was referring more to the Android OS features for the iX12/20 radios, nearly all my jets have the AS3000 which I find as simple as it can get but very effective and useful and which huge plus. I will try the cortex pro gyro very soon and I have always wondered how it compares to the AS3000 for simple gyro functions. As for telemetry, I'm focused on watching my jet than looking down at a screen that's glared out due the sun lol .. yes you do have a voice option but I don't really use it.
Voice telemetry has saved me twice in just a couple months! Once when I had a flameout in flight at a noisy field(other aircraft noise so I couldn't really hear my jet). When I heard "LOW RPM" I immediately pulled vertical to gain altitude and set up for landing, and would have been able to land safely due to the ample warning, but luckily auto-restart kicked in as well. The other time, I had just taken off and only been flying for a minute when telemetry yelled "ECU battery 9.8 volts, ECU battery 9.7 volts, ECU battery 9.1 volts...". I landed uneventfully and, sure enough, the ECU battery had a cell go bad. I'll never not run voice telemetry again.