Newbie basic question about my first electric plane's flight pack.
03-09-2015 | 08:29 AM
#1
Newbie basic question about my first electric plane's flight pack.
Pardon if what I'm going to ask might sound silly, but sometimes the basics are taken forgranted so that often it doesn't get mentioned or shown clearly in a photo for a newbie like me.
I plan on using my old 72mhz JR8103 TX and 700rx for my first electric plane which will be something like a 45" to 50" mini-telemaster sized plane weighing 32oz to 40oz..
I will be using either a 2100mah 2s 7.4Lipo, or, a 3s 2100mah 11.1 Lipo depending on the finished weight of the plane.
What plugs into where? Does the lipo battery plugs into the ESC, and the ESC plugs into the "THRTL" socket in my old JR 700 receiver? My main question is will I still then need my old familiar 4.8 battery pack to power the servos? If so, I assume the 4.8V pack will plug into the "BAT" socket in the receiver, right? Do I understand it correctly that modern 2.4 receivers only require a single onboard lipo battery which powers everything so that a seperate 4.8v battery pack would not be necessary?
I plan on using my old 72mhz JR8103 TX and 700rx for my first electric plane which will be something like a 45" to 50" mini-telemaster sized plane weighing 32oz to 40oz..
I will be using either a 2100mah 2s 7.4Lipo, or, a 3s 2100mah 11.1 Lipo depending on the finished weight of the plane.
What plugs into where? Does the lipo battery plugs into the ESC, and the ESC plugs into the "THRTL" socket in my old JR 700 receiver? My main question is will I still then need my old familiar 4.8 battery pack to power the servos? If so, I assume the 4.8V pack will plug into the "BAT" socket in the receiver, right? Do I understand it correctly that modern 2.4 receivers only require a single onboard lipo battery which powers everything so that a seperate 4.8v battery pack would not be necessary?
03-09-2015 | 11:01 AM
#2
My Feedback: (1)
The Lipo plugs to the Electronic Speed Control via the batterys heavy wire lead (not the iight gauge balance lead, that's primarily used during charging).
If the motor and ESC are brushless types the three heavy wires from the ESC will be Plugged or hardwired directly to the motor (polarity does not matter if the motor goes the wrong direction just reverse any two of the three wires).
The light wire with the servo plug will be plugged directly to the throttle port of your receiver.
If your ESC has a Battery Eliminator Circuit (BEC) and it is activated then No you do not use your old 4.8 battery pack or any other packs of any kind at all. I think in practice BEC speed controls are used for smaller stuff like yours.
John
Here is just a thought from me, and that is For your first electrics if you are a glow flyer is to start with established packages and known Airplane/electronics/propeller combinations.
If the motor and ESC are brushless types the three heavy wires from the ESC will be Plugged or hardwired directly to the motor (polarity does not matter if the motor goes the wrong direction just reverse any two of the three wires).
The light wire with the servo plug will be plugged directly to the throttle port of your receiver.
If your ESC has a Battery Eliminator Circuit (BEC) and it is activated then No you do not use your old 4.8 battery pack or any other packs of any kind at all. I think in practice BEC speed controls are used for smaller stuff like yours.
John
Here is just a thought from me, and that is For your first electrics if you are a glow flyer is to start with established packages and known Airplane/electronics/propeller combinations.
Last edited by JohnBuckner; 03-09-2015 at 11:09 AM.
03-09-2015 | 03:32 PM
#3
The Lipo plugs to the Electronic Speed Control via the batterys heavy wire lead (not the iight gauge balance lead, that's primarily used during charging).
If the motor and ESC are brushless types the three heavy wires from the ESC will be Plugged or hardwired directly to the motor (polarity does not matter if the motor goes the wrong direction just reverse any two of the three wires).
The light wire with the servo plug will be plugged directly to the throttle port of your receiver.
If your ESC has a Battery Eliminator Circuit (BEC) and it is activated then No you do not use your old 4.8 battery pack or any other packs of any kind at all. I think in practice BEC speed controls are used for smaller stuff like yours.
John
Here is just a thought from me, and that is For your first electrics if you are a glow flyer is to start with established packages and known Airplane/electronics/propeller combinations.
If the motor and ESC are brushless types the three heavy wires from the ESC will be Plugged or hardwired directly to the motor (polarity does not matter if the motor goes the wrong direction just reverse any two of the three wires).
The light wire with the servo plug will be plugged directly to the throttle port of your receiver.
If your ESC has a Battery Eliminator Circuit (BEC) and it is activated then No you do not use your old 4.8 battery pack or any other packs of any kind at all. I think in practice BEC speed controls are used for smaller stuff like yours.
John
Here is just a thought from me, and that is For your first electrics if you are a glow flyer is to start with established packages and known Airplane/electronics/propeller combinations.
John,
That's a relief to hear that I will not have to add a seperate 4.8v battery to operate the rx and servos. That would have added substantially to the weight of a light plane.
As for the combination this newbie may choose; I will very much be following the consensus in dozens of threads I've googled for this size plane which would be targeting a 480- 1020kv motor with either a 7.4v 2100 2s battery, or a 2100 3s battery 11.4v . It will have a 30-40 amp esc...... turning a 9.5" to 12" prop. The final choice of the forementioned will depend on what weight between 28 to 35 ounces that this high-wing 50" plane will finish up at. Yep, in all my hours of studies, I never saw it mentioned if all of this stuff will work on just one Lipo battery in my old JR700 rx! LOL
Thanks for the help.
Last edited by rustyrivet; 03-09-2015 at 03:37 PM.
