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Saturday 7/7/18

2018-07-07, 21:07 by Gary M Jones

I was at the field today between 14:00 & 15:00 all on my own , good flying too. There is a dead sheep along the fence line towards the gate from the pits, I saw the farmer so reported this to her. I hope no one had plans for a BBQ Smile .

Farmer …

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Post by andy-kaz on 2014-05-02, 13:33

Anybody have a 4.8v 1000mah receiver pack battery for sale pleeeeease???  Very Happy 
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Post by Mark Barnes on 2014-05-02, 13:58

For reference you want a 6v if using spectrum 4.8 ok but if the pack is low you can get problems.




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Post by Rich on 2014-05-02, 14:33

Mark Barnes wrote:For reference you want a 6v if using spectrum 4.8 ok but if the pack is low you can get problems.




Never heard that before, but if that's what it takes then that's what you want.

Make sure the pack is kept charged

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Post by Allan Patrick on 2014-05-02, 16:32

Personally I would recommend 5 cells (Nimh Andy. Not lipo!! ie 6 volts rather than 4.8.) for all 2.4 GHz gear. One of the drawbacks of 2.4 generally is that the microcontrollers in them are is much less forgiving of brown out than 35 MHz. Having said that, small light models such as gliders that have a low current demand are fine on 4 cells
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Post by Rich on 2014-05-02, 20:07

So do Spektrum supply 5 cells batteries with their radio packages now or do they leave a little post it note in the case recommending you should not use 4 cell.

I know Futaba don't and I run a 4 cell pack in my Sbach running digital servos.

Spektrum lives in a strange world neither here nor there.

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Post by Allan Patrick on 2014-05-02, 21:11

I think when I got both my DX7 & DX8 package they came with 4 cell packs but couldn't swear on it

Its just that, personally, I much prefer something in reserve so put 5 cell in anything with more than a few servos. I also happily fly all year round and sometimes the temperature is below freezing which doesn't help battery pack voltage under load

I prefer to guard against 'that moment' when your servos are heavily loaded, you've had a few flights, the air temperature is low, the switch contacts are a bit dirty and the ground a bit close...

Just to make it horribly murky, digging out a brand new Speccie rx (AR610 which is a full range rx but probably more suited to mid range models) in the specifications it states voltage input range 3.5 - 9.6 volts

Afaik I've never had a brown out in flight (grab handfulls of wood rapidly!)

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Post by Mark Barnes on 2014-05-02, 21:21

I use lipo so not really arsed, was just advising

For the extra couple of quid why would you not put 6v in?

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Post by Rich on 2014-05-02, 21:25

Like I said Spektrum neither here nor there.

Wasn't it the first Spektrum receivers that had a long reboot time when voltage got close to the limit (brown out) never heard of that in radio control terms until Spektrum came a long.

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Post by Rich on 2014-05-02, 21:28

The money wasn't mentioned.

I was concerned for those using the inferior Spektrum receivers in case the flight couldn't be made safely using a 4 cell pack.

Some of the older servos didn't like 6v

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Post by Brian Colclough on 2014-05-02, 21:32

12V lead acid is the future Wink Spektrum invented the "brown out" to test the strength of the users underwear hence the name  Idea 

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Post by Allan Patrick on 2014-05-02, 21:48

As the leaders in the new technology they were also the first to find the problems... Still, not as bad as Futaba's lethality!

But, yes, the difference in price makes it a no contest. And just because I've never had a brown out doesn't mean I don't need to use 5 cells

Lol! I sometimes use recyled lead in my models and acid in the mouth when this lead dents the ground...
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Post by Rich on 2014-05-02, 22:24

Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy

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