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Model Forum / Radio Controlled / Water Models / June 2004Sail Servo etc
I am finding difficulty in getting information about sail servos. How powerful must they be What movement should they have ( standard ones don't seen to move much) Are rotary servos best Is there a site which can relate information in layman's terms? QW refer to http://homepages.ihug.co.nz/~atong/ scroll down to Boats, Yachts, Submarines, Warship Combat and Nautical reviews sub section = "Reviews, Plans, FAQ & Tips, Jet drive". and check links & downloads amongst which are = "Servo 180 and 360 degree mods + Fit servos to yachts & boats. " *** "How to Sail fast_ Rig tuning by Bob Sterne " "RC Sailboat FAQ " see also much further down many other good tips under "Radio Systems, Accessories, Alterations and FAQ" sub section = "Servo & TX alterations, calculators, clonepacs, make an ESC or winch, FAQ." if all else fails, email me direct for specific info. regards Alan T. Alan's Hobby, Model & RC Web Links http://homepages.ihug.co.nz/~atong > I am finding difficulty in getting information about sail servos. > How powerful must they be [quoted text clipped - 3 lines] > > QW From the Allan's Hobby reply, it would appear that sail servos can cost more than a boat!!!! What do they use in Kit yachts - they seem adequate In layman's terms please QW > refer to > http://homepages.ihug.co.nz/~atong/ [quoted text clipped - 26 lines] > > > > QW Standard Kitset yachts generally quote the following guides (one sometimes see a label advising model will sail with standard radio set = standard yacht set as below, not a standard cheap car set with two low cost servos. = 30cm ( 12" Footy class) Hitec HS225BB compact high strength expensive servo. 31cm to 60cm = standard Hitec HS322 servo with swing arm. English Metric Torque 4.8/6.0v : 42 / 51 oz 3.0 / 3.7 kg. refer = http://www.hitecrcd.com/Servos/hs322hd.htm 60 - 85 cm length usually a heavy duty servo with at least English Metric Torque 4.8/6.0v : 69/83 oz. 5.5 / 6 kg replacing the old HS605BB is the new = http://www.hitecrcd.com/Servos/hs635HB.htm 85cm to 130cm = specialty sailarm servo English Metric Torque 4.8/6.0v : 161 / 201 oz. 11.6 / 14.5 kg. http://www.hitecrcd.com/Servos/hs715.htm (or see the more expensive lower powered Futaba S3802 sail servo.) If racing a Seawind, Yamaha, Odyssey or similar 1M class, many locals now use a Hitec HS422BB on rudder to achieve higher performance, and the dual oilite bearings whilst preventing slop, do not rust. Hitec winch servo = English Metric Torque 4.8/6.0v : 161 / 201 oz. 11.6 / 14.5 g. http://www.hitecrcd.com/Servos/hs725.htm or again the more expensive lower powered Futaba S5801 winch Other specialty winch servos whose web sites will give you the comparisons for their winches to the above HS 725BB = http://www.users.bigpond.com/rmgsw/ http://www.whirlwindwinches.co.uk/ No free lunches if you want your boat to come home under RC guidance. regards Alan T. Alan's Hobby, Model & RC Web Links http://homepages.ihug.co.nz/~atong > From the Allan's Hobby reply, it would appear that sail servos can cost more > than a boat!!!! [quoted text clipped - 34 lines] > > > > > > QW |
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