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35% radio/servo/battery setup question

Old 06-13-2011, 08:35 AM
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flyerdave
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Default 35% radio/servo/battery setup question

100cc Aeroworks Extra 300. DA100 engine, hitec 7955's on elevators and ailerons, (2) futaba 9152's for rudder standard servo on throttle. (2) 2300ma A123 batteries for Rx and (1)2300ma NiMH for ignition.
Radio is a futaba 9CAP PCM with 149DP receiver with redundant batteries coming off (2) seperate switches.

My question is: Would a Smart-fly power expander be of any benefit to the above setup, or will it work just fine without one?

Thanks
Old 06-13-2011, 10:18 AM
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JoeAirPort
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Default RE: 35% radio/servo/battery setup question

A 9C only has 8 proportional channels. So you'll need some help for all those servo connections (9), not including an ignition kill. Plus (2) battery connections. Also to gang the two rudder servos on one channel you'll need some synchronizer since they are not programmable. I'd suggest a power expander. If you can get one that has a servo synch that will help with ganged servos on the ailerons and rudder. You could use the Hitec programmer for the ailerons, but not the Futaba rudder servos. I went with 2 Futaba 8 CH receivers on my 10C on a 35% Yak. Only one rudder servo....all Hitec programmables. You could do that if you had all programmable servos.

The PE Pro is really slick but desn't have the synch servo outputs. It has a safe switch that turns on both batteries that plug into Deans Ultra ports (sort of like JR Smart safe receiver). I'm not familar enough with SmartFly to know if they have something with that option. Call the guy. He's great to deal with.
Old 06-13-2011, 02:30 PM
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BarracudaHockey
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Default RE: 35% radio/servo/battery setup question

7 servos and two power inputs will be fine.

If that reciever doesn't have a dedicated power input you will have to Y harness one of them to something, I'd go with the optical kill or throttle servo.

That radio will drive you nuts with the lag on the dual elevators.
Old 06-15-2011, 02:38 AM
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flyerdave
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Default RE: 35% radio/servo/battery setup question

What guage wire should the servo extensions be? I will have (2) 12" and (4) 24" and I know that the current draw will be much more than I'm used to with the 50cc planes. Thanks
Old 06-15-2011, 03:47 AM
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BuschBarber
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Default RE: 35% radio/servo/battery setup question


ORIGINAL: flyerdave

What guage wire should the servo extensions be? I will have (2) 12'' and (4) 24'' and I know that the current draw will be much more than I'm used to with the 50cc planes. Thanks
I like to use 20ga wire for servo extensions.
Old 06-15-2011, 05:07 AM
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JoeAirPort
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Default RE: 35% radio/servo/battery setup question

I used 22 gauge on my 35% Yak. I used #16 wire for the A123 batteries going to Deans Ultra connectors to the switches.
Old 06-21-2011, 05:52 AM
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Michael lazzaro
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Default RE: 35% radio/servo/battery setup question

I agree with Barracudahockey, go simple! On my 35% Pilot RC Yak I'm have 5 Hitec 7950 (1 on each surface) and 1 Hitec standard throttle servo into a JR922 receiver that has dual in and out for batteries which I'm using two Fromeco 7.4V 5200mah regulated down to 6.5V with a fiber optic kill switch.
Old 06-22-2011, 01:38 AM
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jill52nabi
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Default RE: 35% radio/servo/battery setup question

Nice and informative post. Thanks for sharing.


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Old 06-24-2011, 07:40 AM
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flyerdave
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Default RE: 35% radio/servo/battery setup question

Can you give me some good suppliers of 20 or 22 guage extensions? I must not be looking in the right places.

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