R2 buffer pack

[Thestructured]

Anyone running one of these? I've thought of adding them to buffer voltage under load but I'm not sure where they'd fit.

I have only been able to find one photo of the pack on a goblin of unknown size and it looked huge.

If anyone is running this thing, could you please post a photo of it in your heli so I can more accurately judge the size and what to expect?

Thanks

[cycled]

Yeah, they're not that small (especially the 50F version), but very light (the caps weigh almost nothing).

I managed to find room inside the chasis of my Compass helis (BECs, ESCs and receivers are mounted on the outside).

The 50F version would probably give a minute or more of normal usage on my 600, far more than enough to cover a disconnected pack, though not a BEC dying at the start of the flight (telemetry can warn about that — voltage drops).

https://www.helifreak.com/attachment...1&d=1463167611
https://www.helifreak.com/attachment...1&d=1463167860

The 25F version is the same width, just shorter caps.

[curmudgeon]

Installed on a Logo 550

[jmackey]

In my Goblin 700.

[Doom Buggy]

The pic here: http://www.rchelination.com/r2-prototyping-buffer-unit/

Shows it in a Goblin 570, I have one in mine as well. It's stuck to the cf back plate by 3m tape, fills the space, but fits.

[atomic84]

Hi all

On the pictures, are these 50F caps? Thanks,
ato

[mqowen]

Glad to see the comments. I was contemplating getting one of these myself. Anyone have any save stories?

[trillian]

I just got one (the 50F) after having it highly recommended as a buffer pack with a Jive 120. So the goal was mainly as a buffer but it will provide just enough power to land in the event of a BEC failure.

I have not flown with it yet but will do soon, just need to get the optimum settings for the RX voltage alarm in order to have the best early warning but not have false alarms.

I have it mounted so that I can reach the button that turns it off.

[AndrewJHawes]

I supply these in Australia.









Very good units, reasonably priced. Will fit most slightly larger helis easily, maybe not 450's.
The 3 x 25F pack is slightly more squat than the 3 x 50F shown, capacitors are just a bit less tall.
There are V3 units still available, but these V4 units are a little more capable these days in terms of circuitry.

The following is a description:

Version V4

Feature Overview:

- 32 bit, 48MHz MCU controlled operation
- Adaptive charging
- Current sensing
- Output for external Alarm*

Operation Range:

- Backup Battery for electric Helicopters for safe emergency landing
- Buffer surge currents on high power model airplanes and helicopters
- Effective buffering of servo reverse current
- Automatic setup**

Maximum Ratings:

- Maximum Voltage (INPUT) 10V
- Maximum buffer Voltage (OUTPUT at full charge) 8.5V
- Surge current 25 Amp

CONNECTIONS, LEDs and BUTTON:

AUX: 3-pin solder port for auxiliary connections*
BUTTON: shutdown system after use
FULL: (green) indicate full charge
60%: (green) indicate 60%-80% charge
20%: (yellow) indicate charging active (blinking) or 20%-60% charge (solid)
PWR: (red) indicate system standby (solid) or setup (blinking after startup) or buffer active (blinking during normal operation)

OPERATION:

10) Connection: Install buffer to a free port on your FBL or Receiver
11) Power on your Model
12) The buffer unit detects operating conditions automatically (red LED is flashing)
13) Charging will start when setup is complete (yellow LED is flashing)
14) Green LEDs indicate charging state
15) When charging is complete, yellow LED is constant on
16) Whey system is supplying current (buffering surges, servo reverse current or emergency supply) red LED is flashing
17) After flight, first power down model
18) Press button to shut down system

[Freeskiken]

Put them on all my Helis. You can get them from AeroPanda.com

[AndrewJHawes]

Here is the 3 x 25F version:

[shua]

I am working to convert my models from Optipower to R2.

Anyone know the big difference between the 25F and 50F?
I imagine it is discharge time?

[JWeber]

It's really discharge time vs size. Bigger size equals more holding power.

Even the big one weighs very little. You can use that down to a 550 size comfortably. Below that, the 25F starts to make more sense.

If all you're trying to do is even out current spikes, then it's a lot easier to mount a simple capacitor in your power system.

Something similar to this. https://www.amainhobbies.com/lrp-bec...p80135/p148201

I've gotten them included with a couple of Hobbywing ESCs that I've bought.

[shua]

Thanks JW

I use the HW caps with my builds now with the Optipower backup gaurds. But I am looking to move over to R2, no more extra lipo to manage and you make another great point I had not thought of yet! No more HW cap necessary!!

So I preorded a few R2s. I will be putting the 50F in 500 size and up, and I picked up a 25F for my G420 Sport.

[Magneto]

There the best I use 25F on all my helis .

Sent from my SM-G900P using Tapatalk

[etherbatxx]

Originally Posted by Magneto

There the best I use 25F on all my helis

that’s a pretty small size for most. you use those even on the large models?

how long does that last?

[Magneto]

At least 30 to 45 seconds depending on the servos brushless tend to consume less juice,The two incedences I have had were under 5 seconds and I saved both, One was a pack disconnection and the other a failed motor the ESC went into hardcutoff shutting down the bec too.The 50F is great for if you want longer power duration but these emergencies happen very fast and in most cases the heli will be on the ground in under 10 seconds, The R2 buffer has been in production since 2010 and has gone thru a few revisions ,See here V1 https://www.rc-heli.de/board/showthr...ght=green+caps V3 https://www.rc-heli.de/board/showthr...ght=green+caps V4 https://www.rc-heli.de/board/showthr...ghlight=buffer V4 manual https://www.mhm-modellbau.de/downloa..._Anleitung.pdf

[Freeskiken]

I put the 50F on all mine. They are not that small but they will fit. On some I have them on the side near the bottom. This is on a Synergy 516. Depends on the BEC Voltage 30-35 seconds usually

[Martinshelis]

Highly recommended. Already saved my heli once due to the esc shutting down.

https://www.aeropanda.com/collection...cts/r2-buf-350

[tonys-heli]

Originally Posted by Martinshelis

Highly recommended. Already saved my heli once due to the esc shutting down.

https://www.aeropanda.com/collection...cts/r2-buf-350

were you using a tribunus when it shut down?