6V OK for GY401?

[jgunpilot]

I went to a 6V, 2,000 ma nicad for my Raptor .30 V2, mainly for longer flying between charges but also for faster servo transit speeds. Someone told me my Futaba GY401 might not like 6V, and it's recommended to use 4.8V. Isee no such warning in Futaba's instructions. Any ideas on this one?

[DavidH]

The 9254 servo might not like the 7.2 volts. Yes I know you said it was a 6 volt 2000 mah pack. But a good 5 cell nicad pack when fully charged will be 7.2 volts. It will be at 7 volts maybe a little less for the first couple of flights.

Here are the specs for the 9254


S9254 Heli High Torque/High Speed
FUTM0224
Volts Torque Speed
4.8V 47.2 oz-in. 0.06 sec/60°
6.0V n/a n/a

Dimensions Weight
1.6 x 0.8 x 1.4 in. 1.7 oz.


Notice there is no specs for 6 volts. That is because it is not recommended.

David

[rtrickyjr]

The 401 is fine with the 6V pack, but use a regulator between it and the futaba servo, or you'll let out the 'smoke' built into it :wink:

[BarracudaHockey]

Duralite sells a step down for the tail servo. Dont run that servo on 6v unregulated

[DavidH]

The Duralite Step Down only steps the voltage down 7/10 volts. If used with an unregulated 5 cell pack. The step down would still supply .7 less volts to the tail servo. So when the pack was fully charged and supplying 7 volts or better. The tail servo would still have 6.3 or more volts going to it.

David

[jgunpilot]

I'm using an S3151 on the tail, so far it's been OK. I was wondering about long term problems. In any event, I just bought some 4.8V 2,500Mah packs so I'll just use them.