8S SETUP ? ON TREX 600ESP - HeliFreak
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Old 08-06-2009, 07:40 PM   #1 (permalink)
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Default 8S SETUP ? ON TREX 600ESP

I'm looking for advice on an 8s setup using a scorpion HK4025 890kv, castle 85hv, and 2 4s 25c 3300mah or 4000mah in series for approx 5 min flight time at 80% battery drain. My question is will 3300mah get it done or do i need to go with 4000mah. Also what pinion gear would i run to achieve about 2200 RPM Head speed.
I would appreciate any advice I could get on this subject or even a setup you would recommend.
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Old 08-06-2009, 07:48 PM   #2 (permalink)
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Quote:
Originally Posted by cactusqt View Post
I'm looking for advice on an 8s setup using a scorpion HK4025 890kv, castle 85hv, and 2 4s 25c 3300mah or 4000mah in series for approx 5 min flight time at 80% battery drain. My question is will 3300mah get it done or do i need to go with 4000mah. Also what pinion gear would i run to achieve about 2200 RPM Head speed.
I would appreciate any advice I could get on this subject or even a setup you would recommend.
for what its worth I'm running a 4025-890 0n 10S with a 12T pinion and squeezing 2150 but keep I keep it @ 2000
your looking at a 16T pinion with a 170 main gear @ 90% EFF with 3.65 cell voltage you should hit 2200 HS
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Old 08-06-2009, 08:15 PM   #3 (permalink)
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Yes, 3300 packs will work if you land within 5 mins. However, you will need high discharge packs and you will be pushing packs pretty hard. Better go with 4000 option.
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Old 08-06-2009, 11:55 PM   #4 (permalink)
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i ran 4000mah packs with a 4025-1100 and ran around 4:30 runs at 2100-2200 HS and would charge back anywhere from 2800-3200 mah. i dont always fly the same routines so discharge varies
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Old 08-07-2009, 06:12 AM   #5 (permalink)
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If you are going for a 8s setup, you should consider castle's new ICE ESC.
it is smaller in size, and logs head speed, throtle stick input, temp., voltage, amp...
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Old 08-07-2009, 11:54 AM   #6 (permalink)
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I'm also running the 890 and just switched to a 14T pinion which gives me just under 2000 headspeed. I use the 3300 35c packs from hyperion and get just over 5 min flight with some 3d, but mostly sport flying and put around 80% back in on charge. the 4000 packs are about 120g heaver for both, but there should be plenty of power to offset if you want longer run times.
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Old 08-07-2009, 07:39 PM   #7 (permalink)
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Night, are you talking about what you get on 10S? How would 8S compare? I have the Neu 1515 2Y, bought it by accident.Anyway, it is 1100Kv, the Neu website recommends 10S, everyone with the scorion 1100Kv is running 8S? I see you running 10S with 890kv. I am trying to decide to keep the motor and go 8S or 10S. I have been told with 10S, my pinion would be too small. Any one have any advice.
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Old 08-07-2009, 08:44 PM   #8 (permalink)
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Originally Posted by poboy62 View Post
Night, are you talking about what you get on 10S? How would 8S compare? I have the Neu 1515 2Y, bought it by accident.Anyway, it is 1100Kv, the Neu website recommends 10S, everyone with the scorion 1100Kv is running 8S? I see you running 10S with 890kv. I am trying to decide to keep the motor and go 8S or 10S. I have been told with 10S, my pinion would be too small. Any one have any advice.
With that kv you would @ 8S need
a 13 T pinion for a HS of about 2100
a 14T ~ 2270
@ 10S, a 10T would give you a HS of almost 2050
a 11T would get you up to 2250
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Old 08-08-2009, 12:12 AM   #9 (permalink)
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Originally Posted by nightflyr View Post
With that kv you would @ 8S need
a 13 T pinion for a HS of about 2100
a 14T ~ 2270
@ 10S, a 10T would give you a HS of almost 2050
a 11T would get you up to 2250
8S it bees then.
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