Simmer
Key Veteran
Location: Massachusetts
My Posts This: Topic Forum | JR
Check the specs, and guess which the pros fly?
Faster + more torque, no question JR is at the top.
The combination of hi speed (the highest) plus very high torque means its very hard to load up the JR servo.
30% faster right ? 30% more torque as well.
DS8717 Ultra Speed Cyclic Servo Specs
Size Category: Specialty
Type: Digital
Torque: 160 oz/in @ 4.8V; 196 oz/in @ 6V
Speed: .09 sec/60° @ 4.8V, .07 sec/60° @ 6V
Dimensions (WxLxH): .83" x 1.59" x 1.57"
Weight: 2.36 oz
Gear Type: Metal
BLS451
SPECS: Torque: 4.8V: 118 oz-in, 6V: 147 oz-in
Speed: 4.8V: .13 sec, 6V .10 sec
Dimensions: 1.6 x 0.8 x 1.4" (40.6 x 20.3 x 35mm)
Weight: 2.11oz (60g)
See the chart, under load the numbers will reveal JR is still fastest because of the hi torque rating
and as for power, I use less than 250mah per tank, rnu a 2400Lith-Ion battery and there are no power issues here. Seem that the hi torque is so hard to load that these servos dont use as much power as everyone thinks. Sure phisically stop a servo and the power will jump but these servo seem to just sip.
http://runryder.com/helicopter/t436040p1/
In the above example the average current was 1.15 amps, which
calculates to 153mAh per 8 minutes (typical flight length). It’s
recommended that only 60% of the available capacity be used to
ensure plenty of reserve battery capacity. In this example using
2000mAh batteries 2000 x 60% = 1200mAh (available usable
capacity) divided by the capacity used per 8 minute flight, 153mAh
would allow up to 7 flights of 8 minutes each. |
