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View Full Version : Receiver pack on a Logo 14, what size and where you have it?

OICU812
12-08-2006, 01:27 AM
As title says... I always been running a UBEC, but been thinking of trying a 6V reg duralite and a lipo for the rx. I want to see how much better if at all it feels on 6V. I do not want to weigh it down much and still obviously be able to maintain a good cg. Right now my lipo is only about half an inch to inch forward from back so not alot of play room there for cg. I'd like to know what sizes people are running and how many flights and most importantly where they have their placed on the heli. Pics would be cool, thanks in advance. :mrgreen:
Lorents
12-08-2006, 06:02 PM
Wonder if its possible to achieve this by using a 6V UBEC in adition to the 5V one and only use that to power the cyclic servos while the 5V one powers the gyro and tail servo?

If you connect the black wires from the two UBECs together, cut off the red wire from the gyro and connect it to the red one from the 5V UBEC it should feed 5V's to the gyro...

Just came back home after having a couple beers with some frieds, so please get a second opinion on this one before you toast your 611 :oops:
OICU812
12-09-2006, 05:01 AM
No more beers for you, you are cut off young man! :cheers :woot
Klinger
12-09-2006, 06:28 AM
i'm running my 2S 1300mah under the ESC on the second shelf just in front of the motor with the bec strapped to it. Really not much weight there and cg is still pretty good. The bec is a 6V one from align and my 401 handles that ok with a 5V step down before the tail servo.

Just finnished charging it and it took 410 ma for the three flights i had this arvo, so its probably good for 5 flights or so before re-charging.
Lorents
12-09-2006, 03:39 PM
No more beers for you, you are cut off young man
LOL! Ok, wont do that any more :D

I still thing the dual UBEC thing would work though. Might try it out some day when I am out of projects... Just feels wrong to add extra weight to a heli :(
WillJames
12-10-2006, 06:33 AM
Hi Shawn,

I know you asked for this a long time ago, sorry to take so long. :oops:

I run a FlightPower EVO 20 1800 RX pack, and the heli weighs 7.1 pounds RTF with a 10s1p 3700 pack in it. Finless Bob built and setup this heli for me. Thank Bob!!
NolanManley
12-10-2006, 01:35 PM
Nice setup.

What Tango is that Will? Looks like the 200 T main gear. What pinion?

Oh, and is that the 3S 1800 pack to the duralite regulator?

Thanks
WillJames
12-10-2006, 05:55 PM
2s 1800 pack and Duralite 6V Regulator with tail servo stepdown to 5.3.

Tango 45-07 12T Pinion.

Thank you!!
NolanManley
12-10-2006, 06:16 PM
Cool Will, Thanks
LogoHeli
12-10-2006, 06:29 PM
could you do the same thing with the same pack (or similar), a 35V UBEC, and a switch of some sort?

what switch would i use? Or would you just get some deans, and plug the batt in wen u need it?

Cheers
WillJames
12-10-2006, 06:39 PM
You would probably want to use a 3s with a UBEC
mudbogger2
12-10-2006, 07:10 PM
could you do the same thing with the same pack (or similar), a 35V UBEC, and a switch of some sort?

what switch would i use? Or would you just get some deans, and plug the batt in wen u need it?

I have used a UBEC with good results on 3s. A small 900mah pack will give 4-5 flights while a 1500 will give 8-9 flights. I used a futaba switch and wired in deans connectors and jst type connectors to fit the battery I was using.
BobbySmith
12-10-2006, 07:17 PM
Shawn iam running 1800 rx Fp pack as well 6 volt regulator wiht 5.3 step down


Bobby
OICU812
12-10-2006, 09:14 PM
Interesting I didn't think you could add that much wieght there and get good cg. Guess I'll have to try myself. :), thanks for the info and the pics, I may go with a 1200 to drop a little weight and it sounds as if that would still safeyly give me 6 flights anyways.
LogoHeli
12-11-2006, 02:22 AM
Why 3S? A 35V UBEC has a minimum input Voltage of 5.5V-a 2S pack is still 7.4

Cheers :)
OICU812
12-11-2006, 02:58 AM
When you use a UBEC it is far more efficient with a higher cell count, a UBEC and a Duralite regulator are very different in electronic design. A duralite regulator is designed only for a max input of 8.0 ish volts, where as different UBECs have a range of up to 45 volts, if you goto either koolflight or medusa site it states the efficiency rating % goes up as cell count goes up.
mudbogger2
12-11-2006, 07:04 AM
Exactly.
Running a UBEC on 3s gives a flight with around 165 mah of drain on a 90 size ship and all digitals. same ship on 2s takes around 300mah for the same flight.
NolanManley
12-11-2006, 10:04 AM
The last two post just opened my eyes and saved me some money as I have a few TP3S 1320ma packs I can choose from to use with an ultimate BEC. :wink:

Really all the post are an education. :lol: