What motor/setup would you use for an 87" Extra 260?

[ChopperUp]

I am building a Pilot-RC 87" Extra 260. I was planning on going with a Hacker A80. However, research shows me that most people seem to use the A60 in planes this size. The $300+ cost difference between the two makes the A60 look like a much more attractive option.

This is my first giant and I am trying to do very thorough research to avoid incurring the extra cost and frustration of replacing an inadequate setup. Do you experienced guys (or gals) think the A80 would be overkill? What about the AXi 5345?

Feel free to comment/suggest on the rest of my proposed setup below:
Motor: Hacker A80 or A60 or AXi 5345/14
ESC: CC 110HV
Receiver: AR9100 (Overkill? AR7000 might be fine for $110 less)
Rx Batt: A123 2300mAh (x2 if I use the AR9100)
Prop: 22x10 or 24x10
Servos: JR ds8611
Eng Battery: 12s 4000-5000mAh 20C/30C

[lazyboyflyer]

	Quote: Originally Posted by ChopperUp
	Feel free to comment/suggest on the rest of my proposed setup below: Motor: Hacker A80 or A60 or AXi 5345/14 ( Out of the three, Get the Hacker A60-18L ) ESC: CC 110HV ( The Hacker prefers the Jeti 99 spin ESC ) Receiver: AR9100 (Overkill? AR7000 might be fine for $110 less) ( Get the AR9000! ) Rx Batt: A123 2300mAh (x2 if I use the AR9100) ( Use only 1 A123 2300mah ) Prop: 22x10 or 24x10 ( Xoar or APC 24x12 ) Servos: JR ds8611 ( good ) Eng Battery: 12s 4000-5000mAh 20C/30C ( Get at the very lease, 5000mah packs )

Just my .02 worth

[3DHobbyShop]

I agree w/ lazy above.

Here's a little more info, we fly 50CC-sized electrics a lot:

I'd go Hacker A60-18L. Ignore the ratings on the Hacker website, nobody follows them, especially not the Hacker team pilots. We've got 1,000's of flights on many of these motors up to 4200W and we've never had a single failure. These motors are awesome. In order to really make use of the potential of the A80, you'll need the Spin 170 ESC anyway, and that's $$$.

I like the Castle 110HV for my stuff, but the Spin99 works well, too.

Batteries - this is the buget buster, here's the info we have to date -

We are perfectly satisfied w/ the Thunder Power packs, they're among the best in most cases, but for most people too $$$. I own a couple of set of the TP 12S 5000mah and yeah, they're great, but real-world pricing is usually $550-600 for the set. If you're made of money, go for those.

Alternately, we are have very good results with the cheapo Zippy packs from HobbyCity.com They are priced at about $78 for a 6S 5000mah and that's less than $160 for a full 12S 5000mah setup. That's not a misprint. Under $160 for 12S 5000mah. They're performing really well. Here's a video on those packs without any tricky flying, but it shows the pullout from hover. It's in one of our 87" Extras at 17 lbs on the A60L.

Here's another, $160 batteries. Right click here to save the video " title="Here's another, $160 batteries." target="_blank">Here's another, $160 batteries.

://young99.net/images/Videos/87SHP14.wmv That one is also Hacker A60L.

BTW, I think I've flown every single possible combination of Hacker, prop, and pack in 50CC planes. Assuming you are at about sea level upt o 2,000 ft. and your plane is reasonably light (gas-powered weight around 17.5 lbs. or so) then here's my favorite setup right now:

Hacker A60-18L
CC110HV ESC
APC 25x12.5 E prop
12S 5000mah lipo
ESC settings : Low timing, Acceleration 3 out of 10, no LVC. Timer is set on 8:30. Expect to put about 4,000mah back in.


Other than the motor, ESC, and batteries, the setup on an electric 50CC is the same as a gas-powered one, all the rest of the equipment is the same.

[ChopperUp]

Awesome feedback! Thanks lazyboy and 3dhs. Seems like you both generally agree on motor, lipo, and prop size so I will close the debate on those 3 items. I will go for the A60-18L with 25x12(or 12.5) prop and a 2x6s 5000mah. (These 6s batts will be awesome for using in my Trex500 heli too)

lazyboy:
• The Jeti is pricey but I must admit that the spinbox's features still make it an attractive option. I will consider it.
• Aside from 2 more channels (which I don't think I need since my Tx is a DX7), is there any other reason to use the AR9000 instead of the AR7000? If not, I will probably just save the $70 and go for the AR7000.

3dhs:
• Someone else recommended I try the Zippy batts too (only for my heli). They said basically the same thing you did which was that for the money they are hard to beat and the difference in performance was minimal if any. I'm sold.
The only thing is that the $78 dollar ones at hobby city are only 15C-25C. I thought I needed 20C-30C which are $134 (still a great savings over a name brand tho). Does that matter? I see someone posted a positive review of the 15C batts with the same setup (A60-18L/CC 110HV/87" Extra) on the HC website so I assume not.
• The video was cool. Thx. It seems like that setup has all of the power I will need.

Thanks again guys. Anyone else want to chime in?

[3DHobbyShop]

Chopper - For these setups, if you properly choose the prop, etc, you're only using about 18-19C max peak current. So, so far, 15-25c is holding up fine. We don't know how many cycles the Zippy's will last compared to the the 300 or so we get with TP, but if you need a cheap option, I think it's the way to go.

[bsipro]

ChopperUp
the Hacker A60-18L with the CC110 is a great setup for this plane. I would try to get 25c lipos you will see better performance. the A80 is overkill. I tried a A60-18L in my 33% H9 Suhkoi it had good power at 20lb. l also had it in a H9 Carden Yak and I was real Happy with It.
I just finished the 97" Pilot RC 260 with a A80 /spin 200 and it came in at 21.5lb. w/lipo's. your 87" should come in light.

[The STIG]

!

[zoomer260]

	Quote: Originally Posted by The STIG
	!

Okie Dokie ! ???? THE ZOOMER !

[ChopperUp]

Thanks for all of the good advice (well...except for TheStig's). I found a good deal on the CC110HV ($179) so I pulled the trigger on that today.

I was looking at batteries and I see that 4000mah 6s 20-30C batts at hobbycity are about half the price of 5000mah 6s 20-30C batts. It seems to me I would get more total flight time per dollar buying twice as many 4000mah batts. Is that right or am I missing something?

Also, the 4000mah are about 185g lighter which makes a pair of them lighter by about 13oz.

[ChopperUp]

OK. I have bought most of what I need. There are just a few more items left but I need more advice:

1. Where can I get a 24x12 (or 25x12.5) wood or CF prop? I would prefer CF but doesn't really matter much. All I can find are the APC plastic ones.

2. How much servo thrust do I really NEED? I like the JR 8611 and 8711 servos but would rather not plunk down $700 for servos if that much thrust is just going to be overkill.

3. With this much invested in this plane, I am convinced redundent Rx power supply is a good idea (using a AR9100 Rx) . Any suggestions for the lightest way to do this would be appreciated. A123's, NiMH's, etc? Exact batt specs would be nice since I am not 100% clear on Rx power systems.

[bsipro]

ChopperUp

Call Ben @ 3DHobbyShop.com he has Xoar Props they work great.

servo's I would go with the JR 8711 you will be able to use them in your next plane when you move up in size.
the main thing is that you don't want to loose a plane because of servo failure what you saved in servos may cost you a plane.

I use 1-AR7000 RX with 2- 2's 2300mAH A123 (1 in the Batt channel and 1 in a open channel) use HD switchs for each battery. the setup works great and it is light I use about 600mAH per battery for 6 flights and you can charge them fast.
here are some links that have pictures of my setup
I hope It helps
http://www.flyinggiants.com/forums/f...er-a100-4.html
http://www.flyinggiants.com/forums/f...a80-8-a-3.html
http://www.flyinggiants.com/forums/f...r-a60-18l.html

[3D1]

save your money and buy hitec 7955tg servos. they are 89.99 at Troy built models. not to mention wont get that jr slop in the gears. I wish i did I have 8611's . also for a power system having a redundant system in a 30% plane is not really needed, but call fromeco they will be happy to answer any questions.

[3D1]

I tell how much thrust a servo needs to have by the weight of the plane. 16 lb plane is 256 oz. therefore you need a servo that has a minimum of 256 oz of torque for 3D.

[Surly_Schmidt]

	Quote: Originally Posted by 3D1
	I tell how much thrust a servo needs to have by the weight of the plane. 16 lb plane is 256 oz. therefore you need a servo that has a minimum of 256 oz of torque for 3D.

Not exactly. Show me a pilot that can squat 1500lb

[BoneDoc]

If your LG won't let you swing a 25" prop, then go for the 16L. With GOOD throttle management, it'll do well with 24x10. My zippy 15c works well with that setup as well, but then again, I know how to control my left thumb .