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Ian Shilling
(@ianshilling)
New Member

Just bought some of these for my more expensive models and have a query re its use with a ESC that incorporates BEC.   

Specifically the instruction manual indicates that power supplies must not be connected to CH1-8, however the FRSKY video shows the esc and hence power supply being successfully connected to CH3.

Is it a case of confusing instructions?

Quote
Posted : 30/06/2020 5:46 pm
Chris Marshall
(@chrismmarshall)
New Member

 You need to disconnect the power feed from the ESC. I have an RB10 working in just that configuration. Two separate receiver batteries on the power inputs. It may be possible to feed the power from the Bec to  one of the input connections, i.e. only connect the signal wire to the output, and the red and black wires to one power input. You would still need a battery on the other input as a backup otherwise there's not much point in having the RB10 unless it's just for the radio link redundancy. For the BEC to be the preferred source of power it would need to have higher voltage set than the battery. You could do this using  a LiFe battery, with the BEC set at 7. 2V. I have considered using  this configuration for a large motor glider but I haven't tried it yet. I have two models using it conventionally with a couple of Lithium Ion batteries each. Not Lipos they are not so reliable as good LiIo cells. As more expensive models tend to be larger the weight penalty is insignificant. There is the added bonus that there is less dissipation in the ESC which will mean it runs slightly cooler.

Note that I am not a distributor or dealer this is just based on my own experience. I am a professional electronics engineer though.

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Posted : 01/07/2020 2:53 pm
Ian Shilling
(@ianshilling)
New Member

@chrismmarshall

Thanks for the info it is much appreciated.   It made it clear that I need to disable the esc bec and power servos via 2 separate rx batteries.   As you say, the small additional  weight  will not be an issue.

ReplyQuote
Posted : 07/08/2020 9:41 pm
Chris Marshall
(@chrismmarshall)
New Member

@ianshilling glad it helped. Frsky kit is mostly very good but their documentation sometimes leaves something to be desired!

ReplyQuote
Posted : 07/08/2020 10:37 pm
Pete
 Pete
(@pete)
Active Member
Posted by: @chrismmarshall

@ianshilling glad it helped. Frsky kit is mostly very good but their documentation sometimes leaves something to be desired!

Learn to love Github: 

https://github.com/opentx/opentx

Doesn't always solve problems in lowest levels (ACCESS-radio-Rx) but a font of knowledge on higher levels. 

For lower levels, learn to love RCGroups eg Important Firmware Update - ACCESS 2.1.x and New FrSky RX's - RX4R, RX6R, G-RX6

ReplyQuote
Posted : 08/08/2020 8:53 am
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