#300x

Sticking with the Tôkaidô Shinkansen and the SCMaglev & Railway Park, this is the (highly abridged) story of the fastest conventional train in Japan.

Rihanna via Instagram Stories

1966 Chrysler 300X Concept

My tumblr blogs:

Hi all,

I've noticed that my Align T-Rex 300x has some play in the swash plate:

If I adjust the pitch to have 0º angle

Then I can move the blade to 1.3º just by slightly wiggling it, without any amount of force, and without the servo protesting.

See the photos below

This is my first normal size helicopter, so I don't know if this is normal:

Should I change the swash plate, or can I keep going?

Can I fly until I receive the new swash plate?

What is the normal / safe amount of play?

Also, if some play is acceptable, then should I take it into consideration when I level the swash plate? Like, I should measure the average angle between two extremities of the play (for example, 0º and 1.3º, the angle is 0.7º)?

Well, any hint will be helpful.

Have a nice weekend.

[EDIT]

The solution I’ve implemented so far is looking for a compromise where the servos are not very far from center, the servo links are within safe limits, and the swash plate is completely level: - Both aileron servo links: Fully screwed (no pun intended). - Elevator servo link: Fully screwed on both ends, and then unscrew 1 full turn the linkage rod. This is like unscrew 1x each ball link. -  Both DFC links (those attached to the rotor grip arms):  - Plastic ball link: fully screwed and CA glued.  - Metal-to-metal screw: unscrewed one full turn.

With this arrangement I managed to have: - Swash plate: leveled - Aileron servo arms: a tad lower than horizontal - Elevator servo arms: a tad higher than horizontal

When trimming the servos, I also achieved a “blue OK” light from the MicroBeastX, meaning that servo ranges are large enough.

Been flying 12 accumulators so far (a little above 1h), and this is my found no particular problem that I could relate to this issue: - The helicopter flies stable, - The only maneuver I dare to perform at full pitch is push ups and down, and the helicopter is stable also there. - But, when hovering, I can feel that it pull a little to the right and backwards.

I believe that the pulling is related to my lack of experience trimming the servos. I’ve ordered the official T-Rex 300x swash plate leveler to see if I can fix the pull.

Also, I feel that the elevator link rod is a bit on the scary side, so I’m not completely satisfied with the solution. I’m currently looking at other kits, see if I can find a suitable replacement part.

The T-Rex 300x has very little space in the canopy. If leads are too long, It’s going to be difficult to close the canopy. This is particularly true if you’re using a non official LiPo battery like the Tattu, which has a XT60 connector with AWG12 wires. Instead of preparing yourself and calm your mind, you’re going to struggle with the canopy while the wires are making all sorts of crazy loops in it’s belly.

To solve this problem, I cut the wires real short, and I let them go outside of the velcro loop. As they’re so short, there is no risk they bother the motor (being an outrunner, nothing should touch it)

Alternatively, there is this solution (look at minute 7:00)