hello everyone, i have a problem with a brain 2 bluetooth mounted on a trex 700 gasser. being a gasser helicopter the vibrations coming from the engine are high, (500/600 global vibration) the problem is that after a few flights the servo soldering in the electronic board breaks. is it a problem with my unit or has it already happened to someone?
This is configuration file, event file, flight record file.
non definito
If the flight controller reads vibrations greater than 200%, it means that you have not complied with the mandatory rules set out in the instructions for mounting the flight controller on the model:
From the configuration file you sent, we can see that the flight controller was activated in 2018, six years ago (it is therefore abundantly out of warranty), and that 345 flights have already been made with the flight controller mounted on the model incorrectly and resulting in a vibration level three times the maximum value (or, since it was not purchased from us, that the flight controller was purchased used and second-hand and therefore its actual history and the number of crashes suffered cannot be known).
After 345 flights with such high vibrations without taking appropriate measures to reduce the vibrations also transmitted to the receiver and servos, it is a miracle that the receiver and the 5 servos did not fail as well.
In order to give a more complete answer to the question, it would also be necessary to know the actual number of crashes suffered by the flight control unit during these six years.
Additional note: In addition to the Nitto and Sekisui double-sided tape, the latest double-sided tape type 9448A in 2mm thickness from 3M, which you can also easily find on Amazon, also gives good results in filtering model vibrations transmitted to the flight control units and receivers (For the servos, it is necessary to use the grommets supplied with the servos).
I am very happy with the brain, and I intend to buy it again, but I can't reduce the vibrations on this model (gasser engine). Can you give me some indications on where to act by looking at the log? It seems that they also come from the rotor, but I replaced everything a short time ago. Is the brain 2 HD unit more resistant?
The recorded log 3 sent is not sufficient to make an in-depth analysis (the engine is only used for 20 seconds and is probably not a log made in flight but a ground or bench test).
Apart from that, since the vibrations of petrol-engine models (Gasser) are higher than the vibrations of mixture-engine models (Nitro), it may be necessary to use two double-sided stickers on top of each other to reduce the vibrations transmitted to the control units and receivers so that they fall below the 200% threshold.
HD models are no stronger than standard models in terms of vibration resistance.
I try to put two 3m 9448A stickers (they are 3mm), I don't want to damage a new unit. Now I'm using a gel double-sided tape (align). I will do a long flight test and send you the log. The servo wiring is fixed to the frame with 3M adhesive pads, is that ok?
If, during the flight (of at least a couple of minutes), the ‘Global Vibrations’ read by the flight controller are ‘around’ (or better still below) 200%, the flight controller mounting is correct.