3D Hobby Shop 71" AJ Slick - Build & Fly thread - Page 1788 - RC Groups
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Dec 16, 2012, 08:28 AM
OOPS
Manta1's Avatar
Quote:
Originally Posted by Park_aviator
What should give more power? The A60-6XS, or a motrolfly motor? Planning 6s 5000mah.
ummm,these motors can be propped,powered,and kv'd to put out the same watts/ grunt.
Motrolfly is generally (read all the time) more efficient.Will give you the same power with less heat. Hackers are good motors and hold up well too. For me,I will always run a motrolfly as long as Ken will let me.
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Dec 16, 2012, 10:28 AM
Barefoot Birkinsomething
rcbirk21's Avatar
Quote:
Originally Posted by TimmyC
What is so magical about 842 degrees?
....pretty much arbitrary. haha gotta love science!
Dec 16, 2012, 12:42 PM
Sippin the Koolaid!
losifanatic's Avatar
Ok the 300kv 5320 out powers the 4330 310kv. The 5320 300kv pulls 3000watts and pushes the 19x8 cf 110gram prop 7850rpms. The 4330 310kv pulls 2740watts and pushes the same prop to 7540rpms. So ken tested the 4430 and said it was 310.58 kv.

So is both of my 5320s l had a higher kv than the 300?

Yeah the 4330 is going to have to have a 20x8 prop to have the same power as the 5320. I asked for higher kv than the 5320 as a were looking for more power???
Dec 16, 2012, 12:55 PM
bryansifsof44's Avatar
With those numbers it appears like your wind of the 5320 is around 330kv.
Dec 16, 2012, 12:57 PM
Sippin the Koolaid!
losifanatic's Avatar
That's what lm thinking too
Dec 16, 2012, 01:02 PM
bryansifsof44's Avatar
When you do the math and convert my 12s setup to 8s it amounts 324kv... Which numbers wise is about what your getting with the 5320. However my rpm reading are higher.
Dec 16, 2012, 01:06 PM
Sippin the Koolaid!
losifanatic's Avatar
My tach is a little off. It was a cheapy one. I tached a dle35 and got 7760 while his on board tack that came with the motor said 8050
Dec 16, 2012, 01:09 PM
Sippin the Koolaid!
losifanatic's Avatar
It is consistent though. So reading numbers all with the same tach it works. I need to get a better more accurate one
Dec 16, 2012, 01:19 PM
bryansifsof44's Avatar
That makes sense...

Well if you go with the 20x8 here's what performance gains you may get:
APC 20x8E
Weight 112g
Peak: 8167 RPM, 3123 watts, 69.8 amps, 44.8 volts
Settled in: 7990 RPM, 2749 amps, 63.1 amps 43.6 volts

Xoar 19x8 PJN
Weight 54g
Peak: 8330 RPM, 2855 watts, 63.8 amps, 44.8 volts
Settled in: 8124 RPM, 2518 watts, 57.8 amps, 43.5 volts

Xoar 20x8 PJN
Weight 61g
Peak: 8102 RPM, 3180 watts, 71.3 amps, 44.6 volts
Settled in: 7947 RPM, 2863 amps, 65.5 amps, 43.7 volts

Looks like close to 325-350 watts more, should will make it slightly more powerful then the 5320 on the 19x8.
Dec 16, 2012, 01:21 PM
bryansifsof44's Avatar
Quote:
Originally Posted by losifanatic
It is consistent though. So reading numbers all with the same tach it works. I need to get a better more accurate one
Ya thats the main thing when comparing your own systems
Dec 16, 2012, 03:34 PM
I fly, therefore, I crash!!!
SteveT.'s Avatar
Quote:
Originally Posted by Park_aviator
What should give more power? The A60-6XS, or a motrolfly motor? Planning 6s 5000mah.
I have only flown the A60-6XS, but I really like it....

SteveT
Latest blog entry: My hangar...
Dec 16, 2012, 04:06 PM
bryansifsof44's Avatar
Steve
I know you said you can't compare numbers... Do you have any rpm readings.
Dec 16, 2012, 04:10 PM
I fly, therefore, I crash!!!
SteveT.'s Avatar
I'm sorry, I don't. The system that is in my 71" Slick is the same system that I took out of my 70" Slick when I sold it, and that was set up when the A60-6XS motors became available (I got the first one that went out to a customer), and that was a while back, and I didn't have a tach then...

SteveT
Latest blog entry: My hangar...
Dec 16, 2012, 04:59 PM
FlyGuy
ldhflyguy's Avatar
Quote:
Originally Posted by SteveT.
I'm sorry, I don't. The system that is in my 71" Slick is the same system that I took out of my 70" Slick when I sold it, and that was set up when the A60-6XS motors became available (I got the first one that went out to a customer), and that was a while back, and I didn't have a tach then...

SteveT
Pilots with the A60-6S:
I've just had three test flights on my 71 Slick with an APC 20x13E on my A60-6S on GensAce 60C 6S 2300s On the ground the current is 100 amps at full throttle. I like the hover pullout performance much better than that of an Xoar 21x10 or a Xoar 20x10. I also like the lower price and durability of the APC.
The motor temp was fine, although the outside temp was 40 deg.
Dec 16, 2012, 05:15 PM
I fly, therefore, I crash!!!
SteveT.'s Avatar
I assume you mean the A60-6XS, as, to the best of my knowledge Hacker doesn't make an A60-6S, That said, I was told by Mike Donovan at Aero-Model that the A60-6XS would swing up to a 22" prop, (but I would think that a 22" prop on a 71" Slick might be a bit too much torque) so a 20X13 should be no problem at all.

SteveT
Latest blog entry: My hangar...


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