|09-11-2007, 08:33 PM||#1|
RCC Master Contributor
I am: Andy
Join Date: Mar 2007
Location: temiskaming shores,Ontario
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OFF THE MARKET
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JR Servo NES-4721 in good working condition
asking $60.00 shipping included anywhere in Canada...Dual Ball Bearings
The same physical size as the 4131 competition coreless servo, the 4721's performance borders on incredible. Using the most powerful, fastest coreless motor available, the engineers at JR designed a new gear train configuration for the 4721 that would boost the torque 30% beyond that of the 4131, while retaining the same speed.
Delivering nearly 120 oz-in of torque, the 4721 has 4 times the output of servos of a decade ago. Some people call it a "mini quarter scale" servo because it has more torque than some quarter scale servos on the market now that are several times the 4721's size.
Because the 4721 has so much torque and speed, it is ideal for any flight surface of any plane that is .60 size and larger. If you were looking to try a 4721, it would be especially well suited to the rudder of large planes, wide-chord aileron applications, or collective pitch on helicopters.
In the surface market, the 4721 will be a top choice for 1/8 scale gas cars, monster trucks, gas boats — they are all great prospects for 4721 use. The 4721 incorporates O-ring seals to resist water and fuel encountered with surface use.
If you're looking for a servo that is likely to meet performance requirements for a long period of time, the 4721 is for you. It is nearly as precise as the 4131, and as engines continue to improve power-to-weight ratios, airplanes will continue to get either larger or faster. That will increase output requirements from servos — which is where the 4721 shines.
Suitable for .60 to 2.5 size planes, pattern, large rudder, boat steering, truck steering and .60 size helis.
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