Electric Power Setup for EF Yak 54 74"?

[Hemoglobin]

Will a hacker A60-20s or 22s work?

What's the diff between the two? Also just need to know what ESC, Rx pack (if needed) and prop (not APC).

I know there are threads on this, but I dont want a C50 motor for $700+. A60 series is what I would like to stick with. Going with 10s (2x5s zippy 5000).

[FlopGun]

Will a hacker A60-20s or 22s work?

What's the diff between the two? Also just need to know what ESC, Rx pack (if needed) and prop (not APC).

I know there are threads on this, but I dont want a C50 motor for $700+. A60 series is what I would like to stick with. Going with 10s (2x5s zippy 5000).

Hemo, maybe someone with more experience can chime in, but I think this is too high a KV (235) to swing a prop needed for good 3D.

For that 12 lb Yak maybe a A60-20M (170) makes more sense.

Is there an electric conversion thread for that Yak somewhere?

[2lo]

Thinking about this myself. set up E/F Yak.. then swapp everthing over when their
Extra comes out. The A60-20s is 245kv which is darn neer the same as
Extreme Flights 250kv which they are getting ready to relese for their Yak and their soon to be released Extra. I'm going to try a couple of HVbec in parrallel to eliminate the weight of a rx pack. I have no experience with this set up. So I too hope someone with experience elaborates.

[Hemoglobin]

HVbec in parrallel to eliminate the weight of a rx pack

Why can't you just run Motor -> Esc -> Batt - Rx like a park flyer?

[FlopGun]

Hemo, it's amost as simple. You just run a separate pack (not with the main batteries) into the receiver.

Now, depending on who you talk to, you may run a whole bunch of complicated setups to get or go from there, but the simple way is just plug a one or two rx packs into your receiver and fly.

For some entertaining threads do a search over at RCU on 'Power Expander'....

[Warbirds Rule]

For the Extra I'm thinking of going with the AR9100 receiver and two small 2 cell lipos direct without a regulator. The only thing is, I can only do that if I use the new Hitec or JR servos setup to handle 7.4V and I don't know if they are the drop-in fit servo for the Extra or Yak? I refuse to go with anything but drop-in fit servos anymore. It's just too much of a hassle sizing servo mounts.

Regarding the motor, I would definitely wait for the new Torque/Airboss combo. I've got the Torque Revolution/Airboss 80A in two of my 5S planes and they've been absolutely bullet proof. I can't see paying Hacker prices when the Torque setup is just as good and costs less (assuming EF gives the usual 20% discount for buying a motor and ESC combo).

Sean


Hemo, it's amost as simple. You just run a separate pack (not with the main batteries) into the receiver.

Now, depending on who you talk to, you may run a whole bunch of complicated setups to get or go from there, but the simple way is just plug a one or two rx packs into your receiver and fly.

For some entertaining threads do a search over at RCU on 'Power Expander'....

[FlopGun]

I have to agree with Warbirds on everything he said.

If you go with the latest Hitec 7955TGs which can take 7.4v then you can just use 2S lipos directly into your spektrum/jr rx. If not, you can use a 2 cel 2200mah A123. Easy as that.

Like Warbirds, I have the Torque/Airboss in my 58" Extra and yes absolutely zero problems and killer performance.

[Hemoglobin]

Thanks for the info, but I still need to know exactly how to set this up. I would love to go with the Torque combo, but who knows how long that will be before it arrives.

So...

Will this work?

Motor -> 110HV Esc -> 2x5s 4000/5000mah -> AR7000 -> Servos and Nimh 5cell 2000mah

[bigbobed]

I have this plane with an AXI 5320/28, 8s, HV85 esc, 5 cell rcvr pack swings a 19x12w prop. Has plenty of power for me but I don't fly 3d. Could got to 10s with an 18x10 prop for more punch.

[2lo]

HEMOWhy can't you just run Motor -> Esc -> Batt - Rx like a park flyer?
The speed controllers of this size (higher voltage with a 10s) do not have the ability to power the reciever and servos. It takes extra components in the ESC to drop the voltage to operate rx and servos. so either you run a rx pack like glow and or gas planes. Or run a BEC thats capable running off of your batterys and reduce the voltage that will operate the rec. and servos.
I'm thinking of running a BEC to reduce weight.
http://www.western-robotics.com/hercules-BEC-HC_plane.html

there are other manf. like Dimension Engineering and Castle

I've followed a couple of 3D helicopter threads that run a 10s system and really work their servos. Alot of them have switched to western robitcs with good performance and reliability. And no brown outs with the rec.

I haven't used it yet, but it's a lot lighter than a rec. pack.
as soon as tax ref. is back, pressin the go button.. :D

[Tyler P]

Turnigy SK 63-64 3150w/230kv should work in your plane. I'm using it in my 78" Extra 330L with a 20x12 prop. Mine won't likely do good 3D because of the weight, but that motor should be perfect in the 74" Yak.

I'm also using the Turnigy Sentilon 100A HV ESC and twin Zippy FlightMax 5000 5s 20C packs.

[Hemoglobin]

Thank you 2lo, that explains it well.

I think I am going to go with this...

Hacker A60-18m + CC 85 HV + 10s + AR7000 + 6v Nimh 2000 mAh and possibly a voltage reg

[foamieking]

Would a cc85 be enough to handle the Hyperion 5025-22?

[FlopGun]

I think that hv85 can handle it, but I am going to use the Turnigy Sentilon HV100. Many have had success with this ESC and they are only $100. Also if later you want to go 12S in a 85" plane, you may want the extra amp capacity.

2lo, I had not thought of using a BEC, that sounds like a light solution. Would the amp draw be OK? I think you could also use two of them. This has the advantage of working in any RX.

An advantage to a separate rx pack is that you can test and tweak your servos/controls without the need for the big main packs. I kind of like the idea of having the two systems separate for simplicity sake but at the same time you can save 4 or 5 ounces with the BEC.

Oh the decisions!

From what I've read, if you are running a 2s lipo into your rx, you need a spektrum or JR like the 9100 or 921, and of course servos that can handle 7.4 like the 7955tgs.

Not sure about Futaba 2.4 rx or 72 hz receivers but I want to say they can't handle that much juice.

[foamieking]

i have heard some conflicting things about the Sentilion see this thread for an acute description of problems using it in conjunction with the 5025-22:

http://www.rcgroups.com/forums/showthread.php?t=804236

[Tyler P]

Sounds like they might be talking about the older version of the Sentilon. I just ordered the v4 of the Sentilon 100HV. I'll let you know if it's any good on 10s when I bench test everything.

[2lo]

HEMO I think I am going to go with this...
Hacker A60-18m + CC 85 HV + 10s + AR7000 + 6v Nimh 2000 mAh and possibly a voltage reg

Just to make sure I'm not misleading.. you can only use either a reciever pack
or a BEC but not both at the same time.

However.. you can run two BEC's in parrallel to the reciever.
for a little added insurance.

[2lo]

I had not thought of using a BEC, that sounds like a light solution. Would the amp draw be OK? I think you could also use two of them. This has the advantage of working in any RX.

I honestly don't know what the amp draw would be from the servos.
I'm sure it could get close to ten amps in a violent maneuver with full deflection. That would be another reason to run two BEC's in parallel.

I am going to run 2s rec pk first just to see how much is used for each flight.
see if its really worth the weight savings versus how many flights before recharging.

[2lo]

I did find some info on servo amp draw.
http://duralitebatteries.com/flight/tech-acc.php
seems to me with a 102" yak and 6 control surface servos not going past 6 amps during typical 3D flight. A 5amp continous to 10 spike should be good to go :D

[michaelrc]

Will a hacker A60-20s or 22s work?

What's the diff between the two? Also just need to know what ESC, Rx pack (if needed) and prop (not APC).

I know there are threads on this, but I dont want a C50 motor for $700+. A60 series is what I would like to stick with. Going with 10s (2x5s zippy 5000).

I run (ran - I hit a tree) a Hacker A60-18M and 16M in my EF 74" Yak. 20X12 prop on the 16M. 22 X 12 on the 18M. 10 cell 4100 on each. I had to run a bigger prop on the 18 to get the power I wanted so I recommend the 16M or 22S.

(edited to say 22 X 12, not 10 and 20 X 12)

[Hemoglobin]

Thank you Michael.

What ESC for 22s and 20x10 + 10s?

[michaelrc]

Thank you Michael.

What ESC for 22s and 20x10 + 10s?


With the A60-16M, I ran a 20 X 12 Mejlik with a Castle 85HV on 10S 4100. 2400 watts. It flew great - lots of power. Weight was about 12lbs. I plan on using the same system in the 78" Extra (if it comes out).

For what it's worth, I also tried to run a 12S 2300 A123 pack. Could never really prop it enough to get the watts I wanted. Plus duration was poor. Too much weight to run a 12S2P pack. Lipo was the way to go.

[Hemoglobin]

Thank you for the help. I ordered a 22s last night. Will APC work? Also, what servos do you recommend?