Fin

The rudder is pre hinged with a full length wire pin running through 3 pre-fitted lugs glued into the rudder, all moves freely without slop.

The servo location is inside the base of the fin rather than a hatch on the side, looks neater but slightly more fiddly to get the servo in. I'm using JR8511's on most surfaces and the pre-cut hole in the plate glued in the fin to accept the rudder servo was a perfect fit with no extra work needed, even the pilot holes for the servo screws lined up too.

I had to open out the opening in the base of the fin a little to get the 8511 in but this was a 10 minute job using my Permagrit files which if you have not heard of these tools do a Google search as they are invaluable to any model builder (big plug!).

I have not yet worked out the best servo arm lenght to get the desired throws (rudder 38mm from base line at rudder base) but have a 25mm and a 30mm arm on order to see which is best.

Rudder horns are supplied and are nicely made items cnc cut from 3mm carbon fibre plate, slots are pre made in the rudder so most of the work is done but they need opening out and preparing to accept the horns. Picture shows them in place but not glued, I will Hysol later today.

Rudder fixing to fuselage is via two aluminium rods (solid) which are well secured inside the fin and locate into the very strong formers fitted inside the rear section (picture in earlier post). Fin is secured to fuselage via two M3 bolts.



marcs