[Dean Bird]

I'm looking to get the 71" AJ Slick and wanted to get recommendations for motor, ESC, prop, and battery.

http://www.3dhobbyshop.com/71-AJ-Slick--Electric--Red_p_15801.html

Thanks!!

[TManiaci]

Is this a budget build? You looking for an economy (cheap) setup, or name-brand goodies?

[Dean Bird]

Originally Posted by TManiaci

Is this a budget build? You looking for an economy (cheap) setup, or name-brand goodies?

I guess the best criteria would be light weight, powerful, reliable, least maintenance.

The combo they offer includes a Hacker A50-12L. The guys at the field are saying they're burning up the Hacker motors and the Scorpion motors are throwing the magnets. I had an AXI in the AJ Extra 330 I had. I was told they were lighter and more efficient.

"You looking for an economy (cheap) setup or name-brand goodies?"

I'd be interested in seeing both, as long as the economy setup is up to the task.

Thanks!!

[Funboy]

Sad thing is- even the name brand stuff is probably made in the same place...

Glad you're getting a new plane Dean!

[doorguy1]

I must say that I love my Hacker setup ( unlimited power, 8-10 min flight times) with Thunder Power bats. I also have some 30c batteries I got from Valley Veiw RC that are great performers and were signifigantly cheaper. Time will tell though. I only have a small amount of time on them at this point. Oh, mine is only the 51" Slick but I still think the Hacker system is the bomb!

[TManiaci]

Well, I checked every motor that HobbyKing sells, and not a single one comes close to the necessary weight/power of the recommended Hacker A50-12L. That could be why the Hackers are not holding up, they pushed it too hard. All of the HK motors in the 2000-2500W range necessary to make this bird strong are near double the weight of the Hacker A50. That's probably not a good path.

I hate to say it, but your best selection for this bird is probably the AXi 5320/18, but it costs around $200 (without a mount). At least with the AXi you get a free lifetime replacement guarantee if it fails. That's worth a lot. It's a perfect match for this bird on 6S Lipo and APC-E 20x8. The AXi can easily be over-prop'ed 125% of rating to make well over 2000 watts. This is one of those situations where a China-cheap motor choice is probably not a good idea. You'll have a very heavy build to get the power you want.

[TManiaci]

Good set of choices for Battery Selection. You can go 6S1P or you can pair-up 3S1P cells and wire connect in series.

Rhino 3700mAh 3S1P 25C, $24.89 ea, 2x327=654g
Rhino 4900mAh 3S1P 20C, $32.83 ea, 2x352=704g
Rhino 4900mAh 3S1P 25C, $37.13 ea, 2x395=790g

Rhino 4900mAh 6S1P 25C, $68.47 ea, 730g
Rhino 3700mAh 6S1P 25C, $49.99 ea, 600g

These are all going to be lighter builds, but shorter flight times than the recommended 5000-5800mAH packs.

[TManiaci]

Some good low-cost choices on Servos too.

Recommended:

HS-7985MG, 172 in-oz, 0.13 s/60º, 68g, $100.00

HK Options:

Turnigy 620DMG+HS; $17.92, 10.6 cm-kg (147in-oz), 52g, 0.13 s/60º
Turnigy MG959; $23.53, 15.0 cm-kg (200in-oz), 75g, 0.20 s/60º
Turnigy MG958; $15.73, 15.0 cm-kg (200in-oz), 65g, 0.20 s/60º

[TManiaci]

Need 100 A ESC. You will be working in the 80-95 Amp range on this bird.

Recommended:

Castle ICE 100, $120
Castle Phoenix HV-85, $180
Hacker X75 OPTO, $140

HK Options:


HobbyKing Red Brick 100A ESC (5V/5A BEC) , 93g, $28.39
HobbyKing Red Brick 100A ESC (Opto), 83g, $24.37
Turnigy dlux 100A SBEC, (5.5V/3A BEC), 96g, $36.53

[TManiaci]

You'll need a good UBEC. Most don't recommend use of the built-in BEC on High voltage/amperage ESC's like this.

Recommended:

Castle BEC Pro, $47

HK Option:

TURNIGY 5-7.5A (8~42v) HV UBEC, 5V-6V/5A, 37g, $16.45