PDA

View Full Version : Hacker A20-20L On a slowstick?


skid_68
10-04-2005, 04:41 AM
Thought I would post this here also, since RCU recommends this place. :)

Hello, Im looking to pep up my slow stick, and after reading lots of reviews. I think Im decided on the hacker A20-20L. My slowstick with the stock 400 motor on it is 18.5 oz, and this motor says its good up to 18 oz. I would get the combo deal with the X-20 esc. So my esc would be covered, but apparently I need to get a new receiver also? Already planning on getting a 3s 11 v lipo (http://www.rcuniverse.com/buynow/keywordclick.cfm?bid_id=2455), but I have a 7.4v 2200 mah lipo already. Would this batt work with this motor?

What kind of a performance increase will I see with this motor? I know its a slow stick, but I still want more power for it. Will it be able to hover? As you can see, I dont know much about Brushless (http://www.rcuniverse.com/buynow/keywordclick.cfm?bid_id=1904) motors, so thats why Im asking you kind folks for help. Another question. Will I need a gearbox, or should I just mount the prop straight to the motor? Why does the SS motor have a gearbox anyway, and not just come straight off the motor shaft? What motor mount do you recommend for a slow stick mount? On that site it recommends a 10X4.7 prop for 3D flying, I have some 10X6 props, would that increase the amp draw too much? Sorry a million questions, hope some one can help. Here is the link to the motor.

http://www.stevensaero.com/cart/cart.php?target=product&product_id=573&category_id=71 (http://www.stevensaero.com/cart/cart.php?target=product&product_id=573&category_id=71)

For easier answering, Ill make a list of questions. http://www.rcuniverse.com/forum/image/s45.gif

1. Is the Hacker A20-20L a good motor to speed up, and hover my slowstick?
2. What receiver will I need for this motor?
3. Will my 7.4v 2200 lipo be enough for this motor, or will I definetely need a 3s 11v lipo?
4. Will I need a gearbox for this motor on my slowstick? And what is the advantage of having a gearbox vs a prop right on the motor shaft?
5. What stick motor mount do you recommend for this motor?
6. The site recommends a 10X4.7 prop, I have 10X6 props, will this increase the amp draw much?

Thanks guys. http://www.rcuniverse.com/forum/image/s45.gif

Dr Kiwi
10-04-2005, 04:58 AM
1. Is the Hacker A20-20L a good motor to speed up, and hover my slowstick? Yes
2. What receiver will I need for this motor? Bergs are great
3. Will my 7.4v 2200 lipo be enough for this motor, or will I definetely need a 3s 11v lipo? Not ideal, but OK if you run a large enough prop
4. Will I need a gearbox for this motor on my slowstick? And what is the advantage of having a gearbox vs a prop right on the motor shaft? No gearbox - the Hacker is an outrunner
5. What stick motor mount do you recommend for this motor? Try Top Creations - they have AXI mounts which work fine, or a Hacker mount if you use the radial attachment
6. The site recommends a 10X4.7 prop, I have 10X6 props, will this increase the amp draw much? You probably need at least an 11x4.7 APC SF/11x7 APC SF or better an 11x7 GWS HD/12x8 GWS HD, to get the most out of your system and yet not exceed the max limit of the motor (17A/19A). NB. If you go to 3s, a 10x4.7 APC SF is really too much (>20A) - a 10x6 GWS HD would be close to the limit, but probably okay.

Cheers, Phil

nova801428
10-04-2005, 05:38 AM
what would you need to get a new receiver for?

flyranger
10-04-2005, 12:53 PM
:p My slow stick has an E-flite Park 370 brushless driving an E-flite 5:33:1 gearbox and a APC 10x4.7 prop. On my 1150 Nimh 7 cell pack, all up weight is 16oz. Takeoff at half-throttle in about 5 feet. Flight duration about 20 minutes.

skid_68
10-04-2005, 11:55 PM
So I dont need a new receiver then right? I have this one from GWS.
http://www.gwsus.com/english/product/receiver/r4p.htm

So what size prop would you guy recommend for a 2s 7.4v 2200 Lipo?
Thanks for the mount info. Found one for $5.50 on rcworldofplanes.com
So the smaller the prop the faster the motor spins, and the more amps it pulls? Or the bigger the prop, the harder the motor works to turn it, and thus more amp pulled? Another quick question, is the Pheonix 25amp esc, enough esc for this motor? Or should I go with the 35amp, if I get say a batt that pulls a 27amp burst? I see the Phx25 can handle a 40amp surge, but is that pushing it?

skid_68
10-05-2005, 12:05 AM
Actually, wich is better?

Hacker X-20

Or

Pheonix 25

Dr Kiwi
10-05-2005, 01:19 AM
So I dont need a new receiver then right? I have this one from GWS.
http://www.gwsus.com/english/product/receiver/r4p.htm

So what size prop would you guy recommend for a 2s 7.4v 2200 Lipo?
Thanks for the mount info. Found one for $5.50 on rcworldofplanes.com
So the smaller the prop the faster the motor spins, and the more amps it pulls? Or the bigger the prop, the harder the motor works to turn it, and thus more amp pulled? Another quick question, is the Pheonix 25amp esc, enough esc for this motor? Or should I go with the 35amp, if I get say a batt that pulls a 27amp burst? I see the Phx25 can handle a 40amp surge, but is that pushing it?

(1) for the same input voltage a smaller prop will spin faster, with lower amp draw - you may get higher pitch speed, but lower thrust. Put on a bigger prop, the motor will work harder and draw more amps - you may get more thrust but at lower pitch speed.

(2) the battery supplies the current a motor demands of it, it doesn't pull current - the motor does that. If your Hacker 20 or 22 is rated at 16A max, then it doesn't matter whether your pack could supply 100A - you need to prop for 16A max. Thus a PH 25 is more than adequate - a Hacker X20 is probably much the same as a PH25 in terms of performance at <20A. A PH 25 might cope with an instantaneous surge of 40A but it is designed to deal with only 25A continuous.

Cheers, Phil

skid_68
10-05-2005, 04:56 AM
Thanks Phil, much appreciated. I just put in an order at Espirit.com For a Hacker A20-20L, X-20 esc, radial stick mount, and a TP 3s 2100 battery. :) Now just have to find what charger to get, I wish there was one I could just plug into the damn wall, instead of having to buy a seperate Power Supply. :(

hoppy
10-05-2005, 02:00 PM
Hi Phil

--------------------------------------------------------------------------------

Skid 68,
Couple of comments-
1. Your present Rx is okay.
2. The Hacker has a low LVC which I wouldn't use as it could harm the batteries. They say no, but I don't buy it.
3. If you buy the Castle PH25, make sure you get the "new" model (came out in Sept 05). The old model had problems with certain motors.
4. There have been good reports on the CoolRunning ESC's. http://www.coolrunningusa.com/
5. The A20-20L is a great motor.

Dr Kiwi
10-05-2005, 06:56 PM
Hi Phil

--------------------------------------------------------------------------------

Skid 68,
Couple of comments-
1. Your present Rx is okay.
2. The Hacker has a low LVC which I wouldn't use as it could harm the batteries. They say no, but I don't buy it.
3. If you buy the Castle PH25, make sure you get the "new" model (came out in Sept 05). The old model had problems with certain motors.
4. There have been good reports on the CoolRunning ESC's. http://www.coolrunningusa.com/
5. The A20-20L is a great motor.

Hi Hoppy,

Can one upgrade an older PH 25 just using software downloads via the PhX link, or does one send the older PH 25s back to CC for upgrading (hardware/firmware?).

I've done just one test with a CoolRunning A12 - performed perfectly but no differently than did the PH10 - further testing might reveal the touted lower amps/more performance/cooler running motors, but we will have to see.

Azarr
10-06-2005, 01:26 AM
Hi Hoppy,

Can one upgrade an older PH 25 just using software downloads via the PhX link, or does one send the older PH 25s back to CC for upgrading (hardware/firmware?).

I've done just one test with a CoolRunning A12 - performed perfectly but no differently than did the PH10 - further testing might reveal the touted lower amps/more performance/cooler running motors, but we will have to see.

You can't upgrade it using the Castle Link (just a name change for the Phoenix link since they added the Thunderbird line). The new PH 25 has been upgraded with a 3A BEC, so it's a hardware change. I also haven't heard anything about an upgrade program. I can't speak for castle, but If I remember right, most of the other upgrades were just a software upgrade and could easily be done although they did have to be returned to CC before the introduction of the Castle Link. I'd be amazed and pleasantly surprised if they offered an upgrade for the older 25's.

Azarr
www.ecubedrc.com (http://www.ecubedrc.com)

Dr Kiwi
10-06-2005, 03:19 AM
I'd be amazed and pleasantly surprised if they offered an upgrade for the older 25's.

Azarr
www.ecubedrc.com (http://www.ecubedrc.com)

So would I, but one can always hope for miracles! I now have four Pixies (2x7P, 2x20P) and five Phoenixes (2x10, 2x25, 1x45) and they are probably all obsolete!

Cheers, Phil

P.S. I trust Bob Vincent contacted you for some APC props - we were very pleased to see that you stocked the new 4.75x5.5 E, 5.25x6.25 E and 7x6 SF - none of which seem to be in the Landing Products prop list.

skid_68
10-09-2005, 10:50 PM
UPDATE: Ohhhhh baby! Power beyond power. Who wants to go for a ride to the moon? Cause this motor will take you there. Unlimited vertical, crazy power. Only flown once, but man o man is it fun.


Also update on props. I bouth an E-Flight Wattmeter today, and heres what i found out on props.

Hacker A20-20L
TP 3s 2100 11.1v
X-20

APC SF 11X7 = 26 amps
APC SF 10X4.7 = 20 amps
EPC 1060 10X6 = 17amps

Im glad I used my 1060 for my first flight, or I might have burnt up my motor. Its perfect for this setup. As the A20-20L has a 6-15amp constant, and 19amp max(15sec) wich I only WOT for less than that anyway. So Im good to go. SF props are too much for this motor, at least the sizes I tried. Thanks for all the info guys. Happy flying. :D

Also, getting 190 watts out of this thing at WOT.

skid_68
10-11-2005, 06:35 AM
Heres a vid of the slowstick with the A20. :)

http://www.zippyvideos.com/9923395871637516/speedstick/

Azarr
10-11-2005, 11:59 AM
So would I, but one can always hope for miracles! I now have four Pixies (2x7P, 2x20P) and five Phoenixes (2x10, 2x25, 1x45) and they are probably all obsolete!

Cheers, Phil

P.S. I trust Bob Vincent contacted you for some APC props - we were very pleased to see that you stocked the new 4.75x5.5 E, 5.25x6.25 E and 7x6 SF - none of which seem to be in the Landing Products prop list.

I'm surprised, the 7 x 6 SF have been on the market for over 2 years and the other two over a year, they were developed for the F5D guys at last years worlds. I have a standing order for any new props so I usually do get a head up on them. They seem to be concentrating on the "Wide" series in the larger (18" up) props at the moment.

Azarr
www.ecubedrc.com (http://www.ecubedrc.com)

hoppy
10-11-2005, 01:41 PM
Phil,
Like Azarr said, the CC25 is an all new design using the same design one of their larger ESC's uses. . There is an upgrade program, cost depends on how old your 25's are. If they are within warranty, I think it is free but you'll have to check with them on that.

Another point. Older CC25's (we don't know how much older) work fine with the high KV outrunners, so it's not an absolute must to change. I have two that are in the 1-2year old range that don't heat up. The problem was with high kv outrunners...the ESC would literally melt down in a few minutes at partial trottle. If yours don't get hot at partial throttle you don't have a problem. Check the CC forum at you know where.:) I'll PM you the thread.

littlephoenix
02-19-2011, 12:29 AM
the A20 20L is a great motor with lots of power, for the slowstick, i would not use a 2200mAh lipo its to heavy, use a 1500 or a 1300mAh, she will fly much better ;)

skid_68
03-04-2011, 07:03 PM
the A20 20L is a great motor with lots of power, for the slowstick, i would not use a 2200mAh lipo its to heavy, use a 1500 or a 1300mAh, she will fly much better ;)


Whoa, it's been awhile since I posted this.

Yes the A20-20L is an excellent motor for the slowstick. Tons of power for just flying around, and for AP. I've always used my TP 3s 2100mah battery, and it flies great. I even use a similar size battery on my other slow stick with a BP-21 I believe, and it carries the weight with no problems. Gotta love the slow stick. :D