Re: cobra 5 build log
I too are finishing up a first RG65 and about to make a McRig for it. Mine is quick and dirty from a found heavy glass hull so I am trying to keep weight down to meet hull displacement at around 800gms, and that rig will help this. Failing other postings, just remember to keep the head of the sail over the pivot point, giving around 25% area ahead of the pivot. I'll try a 3/3.3mm - (1/8th inch) Z wire, but may have to be more for a full rig or higher winds.
Because the rig is balanced a lower power servo should do. I've got a 20gm GWS Park 4.2kg/cm here to use with a Stollery power lever servo arm which I will run with a 2s lipo and 6v BEC AM receiver. Classic rigs typically use a 30gm GWS Micro 2 MG BB 5.4kg/cm @ 4.8v. and a standard servo arm. I will be sailing in moderate wind conditions at worst and pretty simple 2 purchase sheeting without a lot of friction. Classic standard servos of some age can be 40 gms and 3kg/cm!
Using a 8 gm rudder servo with whipstaff connections ar la vane steering.
George Little: Maybe we should go home.
Mr. Little: Why?
George Little: I'm not wearing my lucky underwear.
Mr. Little: You don't have lucky underwear.
George Little: Well, maybe we should get some, and then come back for another race.