29-08-2017, 03:15 PM
Positioning of receiver antennas is very important, it's quite easy do reduce your reception by less than optimal receive antenna placement!! Antennas in close proximity to wires or carbon frames are not going to be optimal.
Also there are some reliability issues with orange receivers. I know they are economical and many of them work very well but I must say I have had radio issues with more than one of them. I haven't had a so much as a glitch with an original spectrum receiver. I've had two issues with FRsky both of which had been adequately explained one was a firmware problem with an early RX which locked up then returned to normal after reboot. The other was a total failure of an RF board of an early Taranis Transmitter.
Neither of these were intermittent glitches. These were instances where control was lost with out warning and stayed lost.
I think it's a good idea to use an ESC with at least a 5A BEC tho' 3A should be enough. The trouble with some ESC's is that the BEC is mounted on the same heat sink as the main switching FETs and once the ESC gets hot from driving the motor the capacity of the BEC can become greatly reduced.
It's a very good idea to make sure that an ESC has adequate cooling and/or is moderately larger than what is required. It's not good to have the ESC as the weakest link in the power system. It's much better to have a bigger than needed ESC.
A separate BEC is a great way to go As Dirk pointed out in his post.
The BEC on a multi rotor should not have to work very hard at all and there should be plenty of cooling so I would be looking at antenna placement as a possible issue there. Is it an orange receiver? How many times has it been subject to harsh impacts. Multi rotors seem to handle a lot more abuse than fixed wing airframes so their radio gear can have suffered quite a hard life.
The bottom line is that If I suspect a receiver of not working properly I fix it with a big hammer and make sure it never causes problems again. It's is simply not worth having a dodgy or unreliable RX in a flying RC model.
Please bare in mind that our field is in a rather dirty Radio environment, it's on the edge of an industrial area where there are all sorts of noise sources. There are Mobile towers and there are also domestic noise sources like Wifi and microwaves. There are high tension lines and who knows what else. At times I marvel at how well our radio links hang in there. It really does pay to do everything to give your gear the best possible chance of working correctly. If something is dodgy please do your level best to find out why!! Do proper range checks and have a good hard look at your electrical and radio set up.
Also there are some reliability issues with orange receivers. I know they are economical and many of them work very well but I must say I have had radio issues with more than one of them. I haven't had a so much as a glitch with an original spectrum receiver. I've had two issues with FRsky both of which had been adequately explained one was a firmware problem with an early RX which locked up then returned to normal after reboot. The other was a total failure of an RF board of an early Taranis Transmitter.
Neither of these were intermittent glitches. These were instances where control was lost with out warning and stayed lost.
I think it's a good idea to use an ESC with at least a 5A BEC tho' 3A should be enough. The trouble with some ESC's is that the BEC is mounted on the same heat sink as the main switching FETs and once the ESC gets hot from driving the motor the capacity of the BEC can become greatly reduced.
It's a very good idea to make sure that an ESC has adequate cooling and/or is moderately larger than what is required. It's not good to have the ESC as the weakest link in the power system. It's much better to have a bigger than needed ESC.
A separate BEC is a great way to go As Dirk pointed out in his post.
The BEC on a multi rotor should not have to work very hard at all and there should be plenty of cooling so I would be looking at antenna placement as a possible issue there. Is it an orange receiver? How many times has it been subject to harsh impacts. Multi rotors seem to handle a lot more abuse than fixed wing airframes so their radio gear can have suffered quite a hard life.
The bottom line is that If I suspect a receiver of not working properly I fix it with a big hammer and make sure it never causes problems again. It's is simply not worth having a dodgy or unreliable RX in a flying RC model.
Please bare in mind that our field is in a rather dirty Radio environment, it's on the edge of an industrial area where there are all sorts of noise sources. There are Mobile towers and there are also domestic noise sources like Wifi and microwaves. There are high tension lines and who knows what else. At times I marvel at how well our radio links hang in there. It really does pay to do everything to give your gear the best possible chance of working correctly. If something is dodgy please do your level best to find out why!! Do proper range checks and have a good hard look at your electrical and radio set up.
“The knack of flying is learning how to throw your machine at the ground and miss.”
"When once you have tasted flight, you will forever walk the earth with your thoughts turned skyward, for there you have been, and there you will always long to return." ~Leonardo Da Vinci