70cc FLEX Ultimate assembly thread.
- Thread starter Snoopy1
- Start date
Snoopy1
640cc Uber Pimp
This is a JR thing, when you bind your receiver you can set it up in XBUS OR pwm. When set your receiver in XBus mode all the channels on the receiver in in Xbus. The Ibec from AJ is pwm device and cannot read XBus. So JR sells a device that translates XBus into pwm so that you can run other devices as required, hope that makes Sens. The rubber servo going into the plane is a MKS777 and it works on Pwm therefore I needs a pwm converter to make the servo to work. Using the servo had it left over and did not want to buy another expensive servo.
Snoopy1
640cc Uber Pimp
It very difficult to explain XBus allows you to tune the servos before they are installed into the plane, second there is no And I mean absolutely no delay from one servo to another servo on the same channel in XBus the signal is sent in one command, not like when you mix channels. You can honestly feel the difference and also if you have several servos on one aileron they all move the same time. This is one thing that JR has done extremely well which is not very well known. The one important part on this plane is that I have 4 servos and four ailerons this extremely easy to setup on this plane. Just to explain when in XBus mode every channel can be set to have 4 sub channel. This means I can plug all 4 channels in the aileron channel in the receiver.
if I am not making it clear please Let me know and ask more questions.
Snoopy1
640cc Uber Pimp
Just something I use to get the motor washers to lay flat on the firewall. Once trying to install the DA the bolt holes are very close to the triangle wood gussets on the firewall. I made this tool to sand down the gussets close the motor mounting bolt washers. It is made from a 1/4 bolt and 1 inch diameter aluminum rod Cut to 1/2 long. Then glue 80 grit sandpaper to the aluminum Part. Push the bolt through the hole connect a drill to the rod. Turn the drill on and then pull on it , it sand the bevel away in no time.
TonyHallo
150cc
Where have I heard that before?
Snoopy1
640cc Uber Pimp
I know it sounds phoney but I have played around with it, changed back a fourth from Pwm to XBus. In the same plane and with in hour. Also did see drop in battery consumption in a 10 minute flight. Not much but it was consistent.
Snoopy1
640cc Uber Pimp
Well installing the bottom wings did not go well. The wing tube fit was good but the rest not so much. G10 fibber plates that hold the wing in did not line up. The left wing needed a bunch of filing to get the wing bolt in. The right wing I needed to make a new G10 plate the holes were just to far off to fix, so spent a few hours making a new one. It all fits now, the only 2 things that are going to a pain and hopefully I can come up with a solution for both. The aileron wire trying to feed them into the fuselage is painful and needs a solution because I will be cursing that every time I assembly the plane. Second is the G10 plate that locks the wing is difficult to line up with the wing and you cannot see the slot for the plate so not easy to slip into the wing into the fuselage.
TonyHallo
150cc
Yes but isn't the transmitter still broadcasting the multiplexed string of channels over some time frame? On some radios one can select a shorter time frame when using less channels. Or is JR doing something different? With OpenTX I will assign the ailerons to channels 1 & 2, elevators to 3 & 4, etc. To be honest the planes I'm flying and the rates I use 10 ms would not make a difference on any control, heck I have 1 second slow on the throttle opening to eliminate hesitation..