Asuga Servo update

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madasuga25

madasuga25

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Thanks boys for all advice with servo, personally I think the 25kg is slightly underpowered for such a big rc but understandably, luckily to say that I pulled apart servo to find sand in the gears. Flushed them out and re greased and all is good. The only way I think of how sand gets in must be where the servo wires go in through the bottom where the rubber shroud is. Anyone else have thoughts on this?
 
madasuga25 said:
Thanks boys for all advice with servo, personally I think the 25kg is slightly underpowered for such a big rc but understandably, luckily to say that I pulled apart servo to find sand in the gears. Flushed them out and re greased and all is good. The only way I think of how sand gets in must be where the servo wires go in through the bottom where the rubber shroud is. Anyone else have thoughts on this?
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It will depend on quality of servo if debris/water will get inside them.but the likes of agfrc that is ip67 rated I’d hope that nothing would get in
 
Nelson.81 said:
It will depend on quality of servo if debris/water will get inside them.but the likes of agfrc that is ip67 rated I’d hope that nothing would get in
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Keen on that agf 50kg monster, a little more than I want to spend, but I'm stoked with the asuga, it's just crazy
 
madasuga25 said:
Thanks boys for all advice with servo, personally I think the 25kg is slightly underpowered for such a big rc but understandably, luckily to say that I pulled apart servo to find sand in the gears. Flushed them out and re greased and all is good. The only way I think of how sand gets in must be where the servo wires go in through the bottom where the rubber shroud is. Anyone else have thoughts on this?
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We used to happily use 13kg servos on the Savage! 😅

I use a 45kg servo in my XTR, but it's hardly a requirement.

That being said, until the servo saver spring is upgraded, there's no benefit from higher performance servos - the spring is the limiting factor.
 
I use the AG’s in some planes and my heli they make some great servos

IMG_8047.webp


IMG_7996.webp
 
Just an FYI AFRC servos are made by AGFRC, they might just be a brand name owned by AGFRC. The internals are identical right down to the version numbers and logo on the PCB silkscreen and brand imprint on the plastic lower gearbox. Either they are made in the same factory or someone spent a lot of unnecessary time counterfieting things that nobody would ever see. I did a teardown of their heli tail servo with pictures here: https://www.rcgroups.com/forums/showthread.php?4689835-AFRC-D3623HBH-S-tail-servo-teardown I ended up buying 3 of the 25kg-cm 0.04 sec servos for the cyclic in a 700 heli project as well.
 
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Atomic Skull said:
Just an FYI AFRC servos are made by AGFRC, they might just be a brand name owned by AGFRC. The internals are identical right down to the version numbers and logo on the PCB silkscreen and brand imprint on the plastic lower gearbox. Either they are made in the same factory or someone spent a lot of unnecessary time counterfieting things that nobody would ever see. I did a teardown of their heli tail servo with pictures here: https://www.rcgroups.com/forums/showthread.php?4689835-AFRC-D3623HBH-S-tail-servo-teardown I ended up buying 3 of the 25kg-cm 0.04 sec servos for the cyclic in a 700 heli project as well.
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Which Is the correct 50kg servo to buy, don't want to spend $130 to find out I bought the wrong one, thanks
 
madasuga25 said:
Which Is the correct 50kg servo to buy, don't want to spend $130 to find out I bought the wrong one, thanks
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PXL_20231228_154329017.webp

PXL_20231228_154349498.MP.webp
PXL_20231228_154404072.webp

You have 2 ways of obtaining these. Import them in directly from places like Bangood, Ali etc or buy them retail from your nearest stockists. In the UK, the 81BHMW is available for about £84 through SMD direct.

Besides torque, don't forget that response is important and the 81BHMW has lots of both.

  • A81BHMW
  • Operating Voltage: 4.8-8.4 V
  • Operating speed: 0.115sec/60° @ 6.0V
  • Operating speed: 0.100sec/60° @ 7.4V
  • Operating speed: 0.085sec/60° @ 8.4V
  • Stall Torque: 34 kg-cm (473 oz-in) @ 6.0V
  • Stall Torque: 39 kg-cm (542 oz-in) @ 7.4V
  • Stall Torque: 45 kg-cm (625 oz-in) @ 8.4V
  • Gear: Steel
For comparison:

Protek 170 SBL (£169)

1000033099.webp


I own a number of both types and as you can see, they're very similarly specced. At 6v volts, the Protek has a shade more speed and is 10g lighter, but the AGF has just a tad more torque.

However, the AGF is IP67 rated waterproof, can operate upto 8.4v and is 50% cheaper.

Mine work perfectly at 6.0v, so my XTR has plenty of responsive steering thanks to the Lee Spring, 34 kg of torque and 0.11s/60° speed. If I ever needed more, all I need to do is up my BEC voltage. This rig uses a FRsky TRF4 FASST receiver - now impossible to find - but in theory it can easily handle upto 10v.

However, on my Futaba R603FS receivers, they are rated for a maximum of 6v only. So most of my fleet will be running at 6v only.
 
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