hi brian have you got a six volt battery fitted to the radio system ? the s3010 servo has 6.5kg pull the s3801 servo has 14kg pull and costs about £54 both futaba or the hi-tec hs765hb has 14.5 kg pull at £24 .i use the last one and it works fine on six volts.ps they are a bit bigger than normal servos so check it will fit in your model .regards sammyk
Edited By sammyk on 30/06/2010 22:57:51
Edited By sammyk on 30/06/2010 23:01:59