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Logo 600 › Help with Logo 600 14s a123 motor
01-17-2009 05:30 AM  9 years agoPost 1
doug101

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Camillus NY, USA

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I'm thinking of acquiring a vBar Logo 600. I already have a Logo 500 vBar. I use 12s a123 on the 500 and get 6.5 minute flights using a Neu 1910 1.5y. I plan on 14s on the 600.

I am mainly looking for suggestions for a motor. I fly mainly large manuvers with mild 3d.

Planned Setup:
Logo 600 3d Vbar,
BLS451 cyclic
9256 rudder
Jive 80HV
14s a123 - use 42v
600 main blades

So I am looking for a motor to give reasonable power without eating my batteries. I am familiar with the Scorpion choices, but feel they may be a bit amp hungry.

Suggestion/comments welcome

Doug

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01-17-2009 08:19 AM  9 years agoPost 2
fergus

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Ireland

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I would say a kontronik tango. I used to run a 45-08 with 10s A123 and get 5minutes in my logo500. They are said to be very efficient. The 45-06 would give you the right Kv (630). I have no direct experience with that model though. Check the max current and operating rpm. You should see 40volts under load on the 14s A123 pack (2.9v per cell). 14tooth would put you around 2300rpm. Allowing for the governor you should acheive 2250rpm. Go 13tooth if that headspeed is too high.

The lower Kv motors (500ish)tend to be more suited to 12s lipo setups. They are often heavier and I think they may be a bit more power hungry for this application. They would give you more gearing options for lower headspeeds though but I think flight time would suffer.

There are some guys running 14s in there logos. Try a search and see what they run.

Regards

Fergus

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01-17-2009 06:23 PM  9 years agoPost 3
Skeysl

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Brno, Czech Republic

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Hi,
I'm using 45-06 in my Logo 600 Vbar but with 13s A123 because of Jazz55 input voltage limit. Flies really great but sometime I can hear HS drop during high rotor load. I guess that with 14s and same motor and pinion it would fly even better.

There's my setup:
- 45-06/Jazz55/13s A123
- 15 or 16 tooth pinion (Uuuups, I can't remember right now. I'll check as soon as I'm home)
- Bls 451/251
- WRH BEC 5A
- Radix 600/105
- AUW 3.3Kg

What charger are you going to use to charge 14s A123? Is there a charger capable of charger them as single pack?

Logo 600 vbar, Logo 400 vbar, Trex450

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01-17-2009 07:28 PM  9 years agoPost 4
fergus

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Ireland

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you could get a Mastech 5020 and charge in 15mins. Check my gallery.

Regards

Fergus

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01-17-2009 07:39 PM  9 years agoPost 5
doug101

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Camillus NY, USA

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I was thinking of the Tango 45-06 and it sounds like that might make a good choice.

skeys: what length of flights are you getting and what type of flying?

I use the Mastech 5020 as suggested by fergus. This is a great a123 charger and can do a 14s pack (just a tiny bit over spec, but gets it done). 15 minutes and ready to go. For higher voltages the dual Mastechs can be used and I think I saw they have a 60v model.

Doug

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01-17-2009 08:06 PM  9 years agoPost 6
Skeysl

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Brno, Czech Republic

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fergus,doug101:
Thanks for suggestion. I've got Mastech 5020 on my shopping list for quite some time but I didn't realize that It can be used to charge 14s. 60V version would be even better.

doug101:
My timer is set to 4:50 and while landing after timer beeps the pack is usually dry. I'm trying to fly as smooth as possible with lots of loops/rolls/flips/inverted/backwards. But no 3D and except few tic-tocs no stick-banging.

Logo 600 vbar, Logo 400 vbar, Trex450

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01-17-2009 08:38 PM  9 years agoPost 7
fergus

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Ireland

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the Mastech rating is 50volts but I found mine can reach 51.8. You need 51.1 for 14s

Regards

Fergus

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01-18-2009 05:38 AM  9 years agoPost 8
doug101

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Camillus NY, USA

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I have to 5020 also but wish I had gotten the 3010e-3. That one can do dual 8s packs at 10a OR 8s at 20a OR 16s at 10a.

Might sell my 5020 so that I could go with 16s in the L600.
Doug

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01-18-2009 07:49 AM  9 years agoPost 9
fergus

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Ireland

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You could still charge 16s in 15minites on the 5020. Just make two 8s packs. Connect in series for flying and parallel for charging. Then charge at EDIT: 20amps.

Were you considering charging 8s1p at 20amps. I don't think they would last too long at that rate. That is almost 10C charging

Regards

Fergus

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01-18-2009 10:45 AM  9 years agoPost 10
Skeysl

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Brno, Czech Republic

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16s A123 in Logo 600 would be really interesting to see. What ECS would you use? Is there any other ECS except Kontronik PJ which can handle 16s?

Logo 600 vbar, Logo 400 vbar, Trex450

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01-18-2009 02:04 PM  9 years agoPost 11
Talron

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Winnipeg, Manitoba - Canada

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I could try 16S on my PJ but I really don't see the point of it. on 14S with a Scorpion HK4035-630 the power is insane. I can't bog it.Unless you want to run 2700 headspeed to suck more power out of it, there really is no point to it.

Ron

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01-18-2009 05:46 PM  9 years agoPost 12
doug101

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Camillus NY, USA

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Talron: What times are you getting with 14s on the scorpion?

Fergus: I charge at 10a currently. I agree, 20a is more than needed and probably not good for the batteries.

The PJ would probably be the best choice for > 14s.

Doug

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01-19-2009 06:07 PM  9 years agoPost 13
Talron

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Winnipeg, Manitoba - Canada

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Im' running 2150 headspeed and getting 3:40. However I put between 1900-2100mAh back in. That allows me 10-20 Secs easy before it drops off. This year I will work on Autos and fly till they die.

Ron

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03-17-2009 06:31 PM  9 years agoPost 14
VicRC

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Burbank,CA

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This is good reading! Will try 14s on my Logo 600. Has anyone use 14sA123 on a CCHV110? It should see it as 10cell lipos correct?

Also what is the exact weight of your 14sA123 packs?

Last night I waited 2 hours for my 10s5000 lipos to charge.

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03-17-2009 11:11 PM  9 years agoPost 15
Talron

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Winnipeg, Manitoba - Canada

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I've used mine on a HV85 so the HV110 will be more than adequate.

I can't recall the exact weight. It's a little over 2 lbs if I recall correctly.

Ron

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03-17-2009 11:40 PM  9 years agoPost 16
knasbollen

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sweden

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I am running 16S A123 in my logo600DX with a PJ and Century 650A 565kv motor. Need to change the pinion from 17T to 14-15T though (used to run 14S).

The motor was hot after 5 min of mixed sport and full pitch climbs etc. Think I need to tach it..

Charging the two 8S packs in about 40 min with a Bantam 902.

3830 grams ready to fly (8.5 lbs).
16S A123 solderless tubes is 1250 grams (2.75 lbs).

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03-17-2009 11:49 PM  9 years agoPost 17
VicRC

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Burbank,CA

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My 10s5000 pack weighs in at 1332grams. I really want a pack around 1000-1100g, which is comparible to 10s3300 or 10s3700. I have a Hacker A50-12L 640kv and it appears I will need 14tooth pinion for 2100 head speed for a 14SA123. Just wondering if you guys notice the large drop of voltage RPM after 1-2 minutes?

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03-18-2009 12:18 AM  9 years agoPost 18
knasbollen

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sweden

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With those values, 640kv 14S and 14T you get this from

http://www.readyheli.com/Online_Hea...ulator_s/81.htm

-----------------------------------------
Result:
Voltage for this calculation (min):2,376/cell with a total of 33,264
Nominal voltage: Spoolup RPM 100% throttle no governor (46,2v): 2706
Avg RPM you will see with 100% throttle and no governor: 2366

Max normal bogging applied you will see RPM at: 1656
(this number should be the minimum if your motor & battery is up for the challenge)
----------------------------------------

You can also do the math with gov enabled...

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