Originally Posted by
1967brutus
I Use nowadays the X8R or XR8R (from memory, forgive me if the designations differ a bit from reality) receivers, with the in Europe compulsory "listen before talk" protocols and max 100 mW TX power, and I do not experience any issues.........
I am happy to read that report Bert.
However, my history with them has not been such a happy one. There was a historic firmware problem, which has been remedied via an update which is installed in new receivers for some time now.
However, some of the early release X8R, prior to this update, have been associated with catastrophic failures.
Two threads documenting some of these:
https://www.rcgroups.com/forums/show...eiver-failures
https://www.rcgroups.com/forums/show...is-Rx-lock-out
While this problem has been "fixed", my personal experience in FrSky receivers has been shaken severely due to this history I regret to say. I could most likely purchase a new X8R receiver, install it in a plane and never have a RF connection problem.
However, it comes down to a confidence and trust issue for me due to the above. I would tremble before flying with one installed on my valued craft.
Not totally logical?
No I agree, but that is my feeling around this at this moment in time.
............ But what IS important and has brought good progress both in developing this solenoid stuff, as well as solving tuning issues............. is the data-logging option, which allows to represent each flight in graphs.
............., once airborne idle won't come down for the following reason: A rich idle mixture on the ground forces the idle air opening to be larger in order to sustain, say, 1500 RPM. Unloading in the air causes the mixture to lean out however, and the larger air opening and now leaner mixture will easily keep the engine at 4, maybe even 5K and landing becomes a challenge.
............... I would not have known this without telemetry and datalogging............
All that is completely clear to me; you have explained it all very well!
I am beginning to realise that this project is not for me. Not just for the realities outlined by you above, but for other reasons that will make the last part of your explanation ("the tuning flights") simply impossible.
I have no access to a local, legal authorised flying field, and at this stage, it does not look like this will change.
I have been attending a flying event once per year, and otherwise just flying hand launched craft in a nearby paddock, probably breaking some law or other!
Here in my country, we are losing flying fields on a regular basis - the "squeeze" is on so to speak.
As a result, I will be unable to do multiple flight testing to evaluate and tune up the system, like you describe.
Quite despite this sober realisation, I will likely still go ahead and assemble a controller, set it up on a converted two stroke on the bench just for the exercise.
A bit crazy I know! But still will be a bit of fun.
Thanks again,
Jim.