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› Anyone thought about going way up in MAH?
08-13-2012 01:54 AM  6 years agoPost 1
thenewguy

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Corvallis, Oregon Where there is liquid sunshine!

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So I was wondering if anyone has gone way up on MAH on a big electric 3D heli?

Here where my thought: After beating the snot out of my E7 today I want more flight time. My E7 is already fairly light with TP 5000 12S system.
I'm right around 11lb. I know of other 3D helis in the 13LB pound range and still perform quit well.

I'm running the Rail 696 blades and am waiting on the new 716 to try. I was think about going with a bigger disk and throwing a set of 11000 MAH Max Amps batteries in if they fit. This would be a 12S 11000MAH system making the heli weigh in at 13lbs. The bigger blades would help with the disk loading.

Lets hear your thoughts on this. Is there anyone out there that has tried this route?

Here are the batteries. http://www.maxamps.com/Lipo-11000-222-Pack.htm

Here are the specs:
Lifetime warranty
11,000mah capacity
6-cell 22.2 volts
True 40C rating
5C fast charge capable
100% waterproof
Built today with factory fresh cells
Built with genuine 12awg Deans Ultra wire
We add the connectors and balancing taps for you
158mm x 59mm x 60mm, 1235g

Here is what I'm running now:
12C
65C
130C
60A
325A
650A
804g
52 x 47 x 155

Was thinking it would be something fun to try.

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08-13-2012 02:07 AM  6 years agoPost 2
jesse

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Houston, TX.

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IMO It would be slugish, and remember your heli would consume more mah the heavier it gets. as far as weight I fly with 713's at 11 lbs 12 oz and I don't want another gram. The heivest I've heard a 700 so far is the new logo 700 at 12lbs 5 oz. he was flying 4 min

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08-13-2012 02:31 AM  6 years agoPost 3
thenewguy

rrElite Veteran

Corvallis, Oregon Where there is liquid sunshine!

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I understand the weight per flight time. Was just wondering if anyone has gone way over on MAH to combat that.

Just thought it might be interesting to try and was wondering if there is any information out there.

I'm also looking at it more in terms of how the new 8oo class helicopters are and thier performing for weight. Those are some big and heavy helicopter but yet they perform and maneuver very well.

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08-13-2012 02:38 AM  6 years agoPost 4
Rossi 19se

rrApprentice

   CA

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Logo 700 does not weigh 12.5 anymore. Its lighter and still is losing weight.

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08-15-2012 05:03 AM  6 years agoPost 5
Solmanbandit

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Tucson , AZ

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I think you would be killing yourself in performance. If you were doing a scale bird, I can possibly see it, but not for a 3D bird. There is a reason why you haven't been seeing other people do it because it wouldn't be worth it. Even the Mikado 800 is using 14s 5000 mah packs.

Trex 700E / Trex 500 ESP - Ikon/ HD 500 - Ikon 2/ Goblin 500 Ikon 2

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08-15-2012 06:33 AM  6 years agoPost 6
jesse

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Houston, TX.

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"Logo 700 does not weigh 12.5 anymore. Its lighter and still is losing weight"
Glad to hear that, I hopr it gets to 11 lbs, then it will be hanging from my wall. Although it did perform flawless I would really like to get to 6 min flight times.

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08-19-2012 02:20 AM  6 years agoPost 7
Greybird

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Davie, Florida

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I used to fly my first Century Swift on 4 cell 10,000mah packs. Not 3D, more scale type flying, and learning orientations. When new, they flew for 20 minutes each. I always flew 2 packs back to back, and the motor/ESC never got crazy hot.

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08-19-2012 02:57 AM  6 years agoPost 8
yannick

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South Korea

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If you fly 10 000mah, you will not get twice the flight time because of the extra weight to carry. But you will have twice the charge time.
So if you charge at the field, you will actually fly more with 2 5000 packs (let's say 2x5min) than with 1 10 000 pack (maybe 8 min?)
For the same charge time... Not to mention that for 3d you will fly a brick, and i would not like to crash with a 12s 10 000 pack in my bird!!!(something also to consider!)

Is it me or this time the ground was higher than last time??

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08-19-2012 02:57 AM  6 years agoPost 9
thenewguy

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Corvallis, Oregon Where there is liquid sunshine!

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That's the type of information I'm looking for.

Thanks,

Chris

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08-19-2012 07:29 PM  6 years agoPost 10
Gregor99

rrElite Veteran

Western Wa

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If you want to increase flight times, here a couple other things you many already be aware of.

1) If your governor has plenty of overhead, drop one tooth in your pinion. This will cause the governor to be pegged the last half to third of the flight. But it will also reduce the power robbing current spikes that happen when the governor is trying to recover from heavily loaded maneuvers. Yes, the headspeed will be less consistent, but that is the cost of reducing those large current spikes. Use of FBL based governor can also help reduce the spikes without lowering pinion size as the response is proactive requiring less effort by the power system.

2) Use a data logger (Eagletree, or Castle) to track the current drain for each maneuver you normally perform. For the higher drain maneuvers, work on finer degrees of collective management to reduce the current drawn for those maneuvers.

3) Lower your headspeed.

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