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Jul 21, 2002, 01:24 AM
Thread OP

would hs-300 servos work with eco 8?

im not to sure on this one thanks a lot
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Jul 21, 2002, 02:21 AM
Registered User
No, it won't work.

That's a full size servo, and you need a micro servo.

You can tell because the HS-300 has four mounting holes, two on each side

. A micro servo only has two mounting holes, one on each side.

Here are some servos that are commonly used:

Hitec HS-81
Hitec HS-85BB
Volz Micro-Maxx "X" or "XP"
Multiplex Micro BB Digi

Basically, you need something about 1.2" by 0.5" by 1.2" or smaller with at least 30 oz/in of torque.

The most popular choice seem to be HS-85BBs for the cyclic and an HS-81 for the tail.

Jul 21, 2002, 05:18 AM
Our Daddy and Heli Junkie
Fred Bronk's Avatar
Adding to Toshi's info, wieght is also critical for EP heli of the ECO size. In fact I doubt a 300 would fit in the frame if it had to.

A standard servo like the 300 wieghs about 1.6 oz. A 85 goes at like .6 oz, so it saves 4 oz!!

But not all micro servos have 2 mounting holes. The JR 368 has 4 and it the same size as the 85.
Jul 21, 2002, 06:19 AM
Registered User
Oh, never seen a micro with four mounting holes.

They must be awfully small, then!

Jul 22, 2002, 02:21 AM
Our Daddy and Heli Junkie
Fred Bronk's Avatar
Same size as the HS-85BB ! But 3 times the price

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