Post
by cfwahl » 20 Jun 2004, 17:41
I haven't used one of these, but I do know a bit about servos. The HS 815 is, on paper, more powerful than the digital 5735. It weighs a bit more, rotates about a third as fast, and costs (only) about $20US less than the 5735. Digital servos have two distinct advantages: 1) their accuracy at repeating a position -- for airplane fliers, centering, and for us, the close-hauled stop particularly -- is better. 2) They also have much greater "holding power" at a fixed position. This comes at the price of greater current consumption.
The HS 815 comes with 140 degree rotation, and, so far as I know, does not have endpoint adjustment, like the Futaba 5801 or the RMG. So unless your transmitter has adjustable travel volume on the winch channel, you'd have to live with that. (ATV and exponential on the winch and rudder are very nice features to have, but the action of an arm winch provides exponential [or sine-wave] action in and of itself.) The HS 5735 can be programmed to any rotation up to 180, I believe. The programmer is ridiculously expensive, but most places that sell them (Kbits in England, ServoCity here, I believe) will program them for a fee.
If I were looking to buy an arm winch, it would be no contest: I'd choose the 5735.
Charles Wahl