Hello,
         i would like to know the actual difference between a digital and analog servo ?

i need steering servo for a gasoline powered 1/4th scale truggy .. aprox 22kgs weight of the truggy.. not sure which servo to use.. below are the links which i was able to find ..  any help would be appreciated

http://www.jackshobbies.in/products_big.aspx?imgid=870

http://rotor.co.in/show-detail.asp?prodid={A1B4FFC7-39D8-4676-84FF-8BAAB8CAEDB2}&pn=1

http://rotor.co.in/show-detail.asp?prodid={2878A46D-B1A8-4B2B-96DC-231689462317}&pn=1
         
            Im not sure about how the servo kgs/ratio is calculated ... any light on that would help.. and the links above given are few which i was able to find.. again not sure which one to choosr .. i even thot of using 2 standard size servo`s for the steering.. 


regards,
Asif

Which model is this? 22kgs is the weight of the car?? For steering , you would need at least 25kgs at 6.0V. Use a 1/4 scale servo for this purpose.

Hitec has some extremely good value for money servos. Rotor is one of cheapest places to buy Hitec servos.

Thanks for the response .. Model 1/4 Fg hummer .. Streached into truggy with on road tires Which are little bigger than the baja 5t tires . . 22kgs is the weight if thetruggy .. Rotor has hitec servos however there is a list of choice which is hard to zero out on one ..fact is I cannot calculate the ratio of servo ineed to use on the truggy..
         Ive added links on what I possibly think fits my requirements..pls suggest the best.. And also put some light on the differences between digi and analog servo ..

Regards ,
asif 

bump

hi there asif,

you have an FG hummer? its really amazing. plz post some pics.

and about digital and analogue servos, check this link. the guy really knows his stuff and the expanation is very clear

http://www.rchelicopterfun.com/rc-servos.html

hope it helps.

cheers.