H-king Turning Trix MX2 1920mm EP 3D build thread

I am not sure what I should do with this CG / rudder issue.
I see 3 option:
- ignore it and see at the end how much extra weight is needed.
- make my own pull-pull rudder control with the rudder servo near the CG
- enlarge the battery tray to the front by 80mm (instead of installing the small motor at 80mm bolts)-> this will give me more flexibility for adjusting the CG

I will just go on building and see if this is going to be a problem...

For the servos, I decided to use the HK15298: (digital HV metal gear)



They are strong, precise, cheap and fast enough.
(and its orange color fits exactly the eye blinding style of the Trix!)


Graupner DES CFK-Heavy-duty servo arms fit well (also Futaba 25T 5.9mm)

For the control-horns, I folowed the Sebart manual:
I removed the film (slots in the control surface are allready prepared) and glued the horns with thick cyano:



The slots in the plates are too thin and need some rework.
To have a good alignment of the holes, I preassembled the linkages.

btw: the linkage screws are mixed: some of them (for the elavator) are metric (M3) and others (for the rudder) are inch.

The 15298 Servos are a bit too tall for the wings; I have added a piece of 1.5mm plywood to prevent buckles of the topside sheeting:



There are two types of ball-links; the wider ones are for the control arms (for the ailerons, additional washers are needed):

The negative throw of the ailerons is limited by the Control arm to 42 degrees (positive throw is around 50 deg.):



Ailerons are finished; connectors are green Multiplex:

Thats my intended power-train:



10s 4500 Nanotech 35C
Turnigy Helidrive 120A HV (now: YEP 120 HV)
a C6364 KV270 Motor (similar to the G160 Motor, but with 10mm shaft)

A first benchtest with 20x10 (for the MX2 I will go with a 20x8):
~80A
2700W
7300rpm
from Drivecalculator:
around 12kg trust
eta around 84%
pitchspeed 111km/h

should be ok!

I like more the woodprops, like the nice Vox props, but my local Vox dealer (Braeckman) does not have the bigger onces.

The motor was originally planned for the big Hobbyking Gee Bee R3; thats the reason for the bigger KV.
But once I get the engine, the Gee Bee gets out of stock...