Help! Bigger Motor for the C pack

Houndpup Rc

Elite member
Hi guys, So I want to upgrade my motor. The one that I have right now is the Goolsky Original SURPASS High Performance 2216 1120KV 14 Poles Brushless Motor off of Amazon. I want something for about $20-30 and that will work with 50a ESC. I want something that will make the Master series really move! I don't know weather in this case more watts or trust is more important. You guys have any ideas?
Thanks guys!
PS. I don't want anything off of ali express! :)
 

Tench745

Master member
Hi guys, So I want to upgrade my motor. The one that I have right now is the Goolsky Original SURPASS High Performance 2216 1120KV 14 Poles Brushless Motor off of Amazon. I want something for about $20-30 and that will work with 50a ESC. I want something that will make the Master series really move! I don't know weather in this case more watts or trust is more important. You guys have any ideas?
Thanks guys!
PS. I don't want anything off of ali express! :)
I don't know about the specific motors you reference, but can speak to one of your questions:
Wattage vs thrust.
Wattage is useful as a quick, rough guess of whether a motor is big enough for your plane. Typically you want a certain wattage per pound of airplane for it to fly well. General rules of thumb are as follows:
50 watts/pound: Trainers and slow flyers
75-100 watts/pound: Basic aero/sport flying
125 watts/pound: Precision aerobatics
150+watts/pound: Extreme 3D performance

Most people on the forums here shoot for a minimum of 100 watts per pound.

The motor and prop need to be sized to each other so that the prop can transfer all that energy from the motor into pulling the plane through the air. Different airframes tend to need different combinations of propeller and motor.

Big, draggy airplanes, planes that you want to accelerate quickly (like hand-launched planes), or planes that you want be able to climb vertically forever will need more thrust. You will typically want a lower kv motor and a large diameter prop without much pitch for these applications so that you can grab as much air as possible for the most thrust.
Other planes don't need as much acceleration or pulling power for and top-end speed is more important. These tend to be sleek, low drag planes you want to fly fast. These tend to have higher kv motors and small diameter props with a lot of pitch.

But its all a balancing act, you just need to match the power system with the plane and the way you want it to fly.
You mention this is for a master series, is it for your p-38, or something else?
 

Houndpup Rc

Elite member
I don't know about the specific motors you reference, but can speak to one of your questions:
Wattage vs thrust.
Wattage is useful as a quick, rough guess of whether a motor is big enough for your plane. Typically you want a certain wattage per pound of airplane for it to fly well. General rules of thumb are as follows:
50 watts/pound: Trainers and slow flyers
75-100 watts/pound: Basic aero/sport flying
125 watts/pound: Precision aerobatics
150+watts/pound: Extreme 3D performance

Most people on the forums here shoot for a minimum of 100 watts per pound.

The motor and prop need to be sized to each other so that the prop can transfer all that energy from the motor into pulling the plane through the air. Different airframes tend to need different combinations of propeller and motor.

Big, draggy airplanes, planes that you want to accelerate quickly (like hand-launched planes), or planes that you want be able to climb vertically forever will need more thrust. You will typically want a lower kv motor and a large diameter prop without much pitch for these applications so that you can grab as much air as possible for the most thrust.
Other planes don't need as much acceleration or pulling power for and top-end speed is more important. These tend to be sleek, low drag planes you want to fly fast. These tend to have higher kv motors and small diameter props with a lot of pitch.

But its all a balancing act, you just need to match the power system with the plane and the way you want it to fly.
You mention this is for a master series, is it for your p-38, or something else?
Thanks! I want it for a different Master series probably a Corsair, because my motor that I have right now will be tied up in the p-38 for a while (the P-38 is going to be my Show plane and not my daily wrecker).
 

Mr Man

Elite member
I don't know if anyone has ever tried one of these?
Nerdnic uses a similar motor in his full sized aircraft. You might want to check out his electronics page on his website.
 

Houndpup Rc

Elite member
Okay so I am thinking of trying one of these, I am trying to get something I can use on the FT master series as well as something to put on the NNspitfire 800 series and make it go 100mph+. What one do you guys think? Remember I have a 50a esc but I might go a couple amps over. I use 4s.
 
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Mr Man

Elite member
Okay so I am thinking of trying one of these, I am trying to get something I can use on the FT master series as well as something to put on the NNspitfire 800 series and make it go 100mph+. What one do you guys think? Remember I have a 50a esc but I might go a couple amps over. I use 4s.
2810 1150kv, 8x6 prop.
 

Houndpup Rc

Elite member
yeah....trying to find a 80a+ one cheap enough for my budget. Been looking at this motor. thinking of the 1250kv model and I could use a 8x8 prop on the nnspit and a 10x6 on the corsair!

 

Mr Man

Elite member
yeah....trying to find a 80a+ one cheap enough for my budget. Been looking at this motor. thinking of the 1250kv model and I could use a 8x8 prop on the nnspit and a 10x6 on the corsair!

I just noticed you can ask for a custom kv.
 

Houndpup Rc

Elite member
yeah....trying to find a 80a+ one cheap enough for my budget. Been looking at this motor. thinking of the 1250kv model and I could use a 8x8 prop on the nnspit and a 10x6 on the corsair!

So this motor doesn't go above 50a until you are doing 90% throttle, and a burst amps on a 50a esc go to 80a. I wonder if I could use my 50a esc being as my esc can do 80a for a little bit but just be careful not to do too much high throttle driving.
 

Mr Man

Elite member
So this motor doesn't go above 50a until you are doing 90% throttle, and a burst amps on a 50a esc go to 80a. I wonder if I could use my 50a esc being as my esc can do 80a for a little bit but just be careful not to do too much high throttle driving.
You could also have the heat sink outside the plane.