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The JR-331 micro servo is on the left in the picture above. It is ideal for wing servos in small to medium size electric gliders; these are the ones I have used for ailerons on my Silent Dream 2.5m, and Phil Connolly used them for ailerons in his Omega 1.8m glider,and his Funstar 3D aerobatic aircraft. At 12mm thick, they will fit in most wings. They have the power needed for large and important flying surfaces. Where size is not so critical, I would recommend these servos for electric flight; they have a robust gear train that will take the strain, and the extra power always comes in handy.
Features are:
- Size: 29 x 28 x 12mm
- Weight: 18g
- Torque: 3.2kg/cm
- Speed: 0.24 seconds to 60 degrees
- Price: now $35
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The NEW JR-375 sub-micro servo is on the right in the picture above - it replaces the 371. It is the tiny one for applications where size and weight are critical. The new version has more power, and is much faster than the 371 - it is only marginally bigger (see specs below). I have seen these tiny servos used successfully in the wings of small gliders (up to 1.5m wingpsan) as aileron servos, and in the fuselage of all sorts of electric aircraft. The power is quite adequate for larger aircraft; also useful for park fliers. Major benefits are the tiny size and low weight - it only weighs 9g!
Features are:
- Size: 22 x 21.5 x 11.5mm
- Weight: 9g
- Torque: 2.0kg/cm
- Speed: 0.16 seconds to 60 degrees
- Price: still $35 each
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