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France, Nord-Pas-de-Calais, Croix
Joined Jul 2011
142 Posts
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Hi to you, happy owners of the minimag,
i have the motor set from multiplex with the permax 2830-1100 motor, and i would like to upgrade it with this one that seems to have tyhe same diameter : IBM 2217 1120 Kv : - KV: 1120 KV (rpm/V) - Power : 336W - Alim: 2-4 Li-Po - Courant max: 23.2A - Diamètre axe: 4mm - Dimensions: diam 28mm, Long 36mm - Poids: 70g It has more watts, so i guess more power than the permax. Will my minimag fly faster ? Thx to you |
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Still, I wouldn't do it. That is not what the MM is about. And all that speed would only worsen the wing incident issue. Perhaps better get a FunJet? |
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France, Nord-Pas-de-Calais, Croix
Joined Jul 2011
142 Posts
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Quote:
I tried my fpv with the permax motor and it cant take off from grass... a hand launch is needed and it seems to have trouble to climb. |
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Hamilton Ontario
Joined Oct 2005
628 Posts
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Watts is power. To get more power from your new motor, you would need to prop up. Since you can't get off the ground, more thrust for you would be beneficial. Thrust is dictated generally by the prop diameter. Try a bunch of props. Move up in diameter one size while keeping the pitch the same.
You may also try this on the stock motor. Try it on the bench first in order to make certain motor temps are in the correct range. You most likely only need extra power for take off, which would just be a burst amount. |
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Hamilton Ontario
Joined Oct 2005
628 Posts
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More power can give you what ever you choose. More Diameter provides more thrust which is what you will need to get off the ground.
More prop pitch will provide you with more speed. More speed will not necessarily get you off the ground. Pitch Speed Calculator. In the above pitch speed calculator you can experiment with the props pitch speed by changing KV and prop pitch. This would be the speed of the wind passing through the propeller. Actual plane speed must be lower than this as it will never be 100% efficient in level flight. |
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BUT, a motor rated for more watts means it can HANDLE more power... meaning you can prop up further without overheating the motor. Of course, thats going to pull more amps, so make sure your battery and ESC can handle it.... So basicaly, if your setup now pulls 15 amps, and you install the new motor with the same prop, its still going to pull about 15 amps. But that new motor can handle 23 amps, so you can prop up to get either more thrust or more speed. To get more thrust, increase the diameter, to get more speed increase the pitch. Either will increase amp draw. |
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France, Nord-Pas-de-Calais, Croix
Joined Jul 2011
142 Posts
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Quote:
Ok, thx, that's what i thought. I need more thrust to put all my fpv in the air with the minimag. I will put à bigger prop with the same pitch, and change the ESC for a bigger one. |
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France, Nord-Pas-de-Calais, Croix
Joined Jul 2011
142 Posts
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Thx to you, a nice calculator ! |
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