12S power systems ideas and options
- Thread starter Ohio AV8TOR
- Start date
Manta
70cc twin V2
3DeltaFly
50cc
Manta, nice 5335-189kv fitted 89 Slick power demonstration video
I'm curious to know what kind of RPM you're getting with the 24x12?
Addendum: OK, found some of your posted info. in another forum for the 189kv wind:
Zoar 24x12 prop (I assume the e-version, PJN)
12s, Glacier packs
110 amps at the most with 4800 watts.
RPM?
[video=youtube;KojeXoA2Ksw]http://www.youtube.com/watch?v=KojeXoA2Ksw[/video]
I'm curious to know what kind of RPM you're getting with the 24x12?Addendum: OK, found some of your posted info. in another forum for the 189kv wind:
Zoar 24x12 prop (I assume the e-version, PJN)
12s, Glacier packs
110 amps at the most with 4800 watts.
RPM?
[video=youtube;KojeXoA2Ksw]http://www.youtube.com/watch?v=KojeXoA2Ksw[/video]
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Aeroplayin
70cc twin V2
[MENTION=81]Ken Man[/MENTION]... I see two new motors on the subsonicplanes.com site and was wondering, again, about the prop and voltage restrictions, as well as Kv options
First, are there other lower Kv options available for bigger props on the DM5320?
Second, are these listed volt and prop restrictions just about heat, or are they also about precession? It seems like the DM5320 is good to 103A from the volts and Watts listed in the suggestions, and I was wondering if it would be safe to try prop and voltage combinations as long as I remain under 103A and maybe 155 degrees F? I guess the main issue is angular momentum. For example, I can hypothetically use a 12S setup on the DM5320 with a 21x10 prop to only 90A if a 210Kv was available, but I'm not sure the motor can structurally handle a 21 inch prop to the potential 7750 RPMs in hard 3D, even if I can keep the temps down under 160 degrees.
Finally, the DM5335 says "For hard 3D flying keep the prop to 19" on 8s and 20" on 6s". But a 24x10 on 12S is probably the smallest prop needed to get anything close to 4800+ Watts on a 189Kv motor.
Thanks for any info you can provide to help clear this up.
First, are there other lower Kv options available for bigger props on the DM5320?
Second, are these listed volt and prop restrictions just about heat, or are they also about precession? It seems like the DM5320 is good to 103A from the volts and Watts listed in the suggestions, and I was wondering if it would be safe to try prop and voltage combinations as long as I remain under 103A and maybe 155 degrees F? I guess the main issue is angular momentum. For example, I can hypothetically use a 12S setup on the DM5320 with a 21x10 prop to only 90A if a 210Kv was available, but I'm not sure the motor can structurally handle a 21 inch prop to the potential 7750 RPMs in hard 3D, even if I can keep the temps down under 160 degrees.
Finally, the DM5335 says "For hard 3D flying keep the prop to 19" on 8s and 20" on 6s". But a 24x10 on 12S is probably the smallest prop needed to get anything close to 4800+ Watts on a 189Kv motor.
Thanks for any info you can provide to help clear this up.
3dmike
640cc Uber Pimp
Hey Aeroplayin... this article by ken might help answer some of your questions. http://3drcforums.com/content.php?275-DM-5335-(50cc-size-Electric)-made-by-Subsonic-Planes
Aeroplayin
70cc twin V2
Thanks... yes, that helps for the DM5335... go with the 24x10 and 24x12 props and I think the edit to the website has already been made. Any other info about the 5320 would be appreciated.
zmonster97
Member
That 5335 looks awesome! I hope to have one in my 87 soon!
Aeroplayin
70cc twin V2
Ok, thanks. I have a DM4330 here on my desk right now with a custom 206Kv and am going to test the 21x8 on 12S. I think the temps should be borderline at 3100W and 71A. If it's not acceptable, I'll send it back to Ken for a rewind:
216Kv with the 20x8 should do 2940W and 67A on 12S
185Kv with the 22x8 should do 2745W and 62A
195Kv with the 21x8 should do 2660W and 60A
I prefer the 21 prop on 74 inch planes, and have a 21x10 on a 74 Edge right now. A nice blend of torque and speed.
The 5335 will go in the 50cc Extra 300 that had a Q80-7M on 10S with a 24x10TH Mejzlik. Ken's motor should bring it in at 18.5 pounds with 2x 6S 40C 5200 Revos and a ZTW. That's down from 19.03 pounds with the Q80 and 2x 5S 40C 5000 Skys and an Ice2 HV160. I just need to hear a little more about how the ZTW performs on the motor because ESC's have been the soft spot in the line-up. I'm loving the Jeti-Mezon right now, just not the price. I liked the Ice2 a lot, but had problems with the Edge.
The only thing I'm waiting to hear more about is the Amps in static testing. I have a lot of experience with the 24x12 PJN and that 7200 RPMs and 112A is definitely in-flight data because that prop will do 112A on the ground at about 6235 RPMs on 12S. My concern is that we may see closer to 130A on 12S at about 6760 RPMs at zero airspeed. This is all at about 8 meters ASL and about 20 degrees C. I know a few guys that have already ordered the motor so we should know more soon.