Futaba 9252 Digital Servo


This is the Futaba S9252 Digital High Torque, All-Purpose F3C Servo with High-Current Wire Lead and "J" Connectors. I'm using these new digital servo's in my new Miniature Aircraft "Fury". I have them on the 3 swashplate functions of the "ccpm" mixing ( roll, elevator, collective pitch ).
I was a bit leery of choosing digital servo's at first, but I figured that by now they had most of the bugs worked out of them. I guess I will see soon<G>.

I defiantly wanted "good" and fast servo's for the ccpm functions on the fury. They need to be precise and stay identical. So far these servo's are doing just that.

One thing before you start using digital servo's is that you must prepare for the extra current that they will draw. Unlike "standard" servo's digital servos draw a lot more power from your battery pack. You will also notice that they have a larger gage wire leads on them. This is for that extra current draw. You will or should run more of a heavy duty switch with the larger gage wires off it. If you need to use servo extension leads make sure that they are as short as possible and they too have the larger gage wire. You can find these from a variety of manufactures.

Now that you know that the servo's draw more power out of your battery pack, it should then be obvious that you won't be able to get as many flights out of it. Make sure you keep a good close watch on your battery pack. The people I have talked to say they recharge after about 2 flights with a helicopter that has 4 digital servo's on it. I was happy with the 3 flights before recharge but I don't think I would go any more. I was using the 1500ma pack that came with my futaba 9zhwc2.

Most of the people I have talked to are using the smaller sized 1700ma "AU" style cell pack. These are light weight and work fairly well.

One thing you will notice about digital servo's is that they will "buzz" pretty much constantly. This is normal, or as normal can be for digital servo's.

Here is a good ".pdf" file that has a very good explanation on digital servo's and how they work. I didn't want to get into that in this review but how they worked for me. So if your interested in more details on them, check this link out.

Futaba Technical Information

Provided by "Ripmax"

FEATURES: Digitally enhanced microprocessors cut about 1/2 of the response time from transmitter input to servo reaction. Coreless motor Dual ball bearings on the output shaft Plastic/nylon gear train Moderately high speed High current, high capacity wire lead with low resistance Case is made of black plastic Dust and water resistant.

INCLUDES: One Digital All Purpose Servo w/Small Round Horn Four Rectangle Grommets Four Brass Bushings Four Mounting Screws One Large Round Horn One Six Arm Horn

SPECS:

Speed: .14 sec/60 degrees (based on 4.8 volt rating)

Torque: 91.6 oz/in (6.6 kg-cm) (based on 4.8 volt rating)

Weight: 1.75 oz (50 g) Power Supply: 4.8 - 6.0 volts

Length: 1.5" (40mm) Width: 0.75" (20mm) _ Height: 1.4" (36.6mm)

HB


Helibuf
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Revised: 27 Aug 2003 20:33:31 -0700 .