I sent an email to Hitec because the torque specs for the 5955TG servo seemed wrong.
The specs according to the Hitec website were:
333oz-in@ 6.0v and
416oz-in @7.5v
And the reply from Hitec was:
"It should read, 333 at 6.0 volts for the 5955 servo.
The 5955’s are not rated for 7.4 volt operation."
How would you get 7.5 volts, unless you used alkaline cells? And 7.4 volts isn’t possible with either alkaline or NiCad/NiMH.
Glen Merritt
It has nothing to do with what type of cells you use. To get 7.5 volts you use a 6 cell pack wired directly to the servo, people use to do this to the non digital servos. You can find wiring information here. http://www.hitecrcd.com/Support/Manuals/ServoManual.pdf though I wouldn’t advise this for a digital servo.
I couldn?t find anywhere on the Hitec website that listed the 5955 at 7.5 or 7.4 volts, where did you find these values?
According to the 5955 spec sheet, maximum supplied voltage should be no greater than 6 volts. Stall torque is listed at 333.29 oz/in and standing at 433.27 oz/in. At standing torque it might be possible that the servo draws 7.5 volts.
http://www.hitecrcd.com/Servos/spec_sheets/HS-5955TG.pdf
That is the first servo that I have ever seen rated for (7.4 or 7.5 volts whatever). How do you get 7.5 volts from a 6-cell pack ( which should be 7.2 volts) of NiCad/NiMH, unless you overcharge the cells, or get them straight off the charger. For the latter, that initial overcharge woudn’t last very long.
We used to do this for electric boats, for an initial extra burst of speed.
The 5955TG is not rated for 7.4 volts. Check the spec sheet.
[COLOR=purple]http://www.hitecrcd.com/Servos/spec_sheets/HS-5955TG.pdf[/COLOR]
Hitech claims the 5995TG can be ?operated on up to 7.4 volts?
[COLOR=purple]http://www.hitecrcd.com/Servos/hs5995TG.htm[/COLOR]
[COLOR=purple]http://www.hitecrcd.com/Servos/spec_sheets/HSR-5995TG.pdf[/COLOR]
this might interest to you [COLOR=purple]http://www.batteriesamerica.com/newpage1.htm[/COLOR]
?Q: My pack says 7.5 volts. Is that MORE voltage than 7.2 volts? OR, my pack says 10.8 volts. Will an 11.25 volt pack hurt my radio?
A: Short answer: 7.5 volts = 7.2 volts in performance. 10.8 volts = 11.25 volts in performance.
Long answer: Some manufacturers list a single rechargeable Ni-Cd or Ni-MH cell as 1.2 volts (Sanyo & Panasonic, for instance). Other manufacturers (Motorola, for instance) list a single cell voltage as 1.25 volts. In actuality, there is NO difference in the cell voltage. However, when a manufacturer declares the extra 5/100 of a volt per cell (it is certainly a permitted activity), it ADDS UP when you have a lot of cells in a battery pack. And the net result is a battery pack that APPEARS to have higher voltage than another. It looks impressive, and it is intended to. BUT, it is NOT actually a higher voltage.?