Mini Pulse ?
 

I have a quick question, I'm using a 2200mAh 3S LiPo on my mini pulse xt which has a 450 brushless outrunner motor on it, and a 25amp pro brushless esc. The sport flyer setup calls for a 2100mAh Lipo, but I couldn't find one at my LHS so I grabbed the 2200mAh pack. Now I'm just wondering if this pack will do fine and if it would increase flight time. Thanks

RE: Mini Pulse ?
 

Your talking a 100 mah, you won't notice a difference. Any increased flight time will not be worth mentioning.

RE: Mini Pulse ?
 

I figured, but just wanted to be sure. Thanks!

RE: Mini Pulse ?
 

An easy way to look at batteries is to consider the mAh size of the battery like a fuel tank. The larger the mAh the larger the fuel tank so the longer you can fly.

Now if you increase the voltage you'll increase the kV or RPM's per volt (in the case of Lipo's is 7.4v for a 2S, 11.1v for a 3S, 14.8v for a 4S, etc - 3.7v per cell). With a voltage change you are dealing with the power output, measured in watts, and the amount or current, or Amps drawn, etc. Change your voltage and you change the watts of power output, thus the amount of current, or amps the motor sees has changed. The guys in the electric form are the ones who are the experts on this stuff. Your motor manufacturer should have provided documentation with your motor, or have available the information as to what amperage the motor will pull using specific props at a specific voltage.

An increase from 2100 mAh to 2200 mAh, or even to 2500 mAh, won't have any effect except to lengthen the flight time just a tad and add a hair more weight due to the increase battery capacity. But with 2100 to 2200 you probably wont notice the difference.

Hogflyer

RE: Mini Pulse ?
 

And elaborating on what Hogflyer stated...

If you increase the voltage you may get more power out of the motor, but you run the risk or overheating the motor, or ruining the ESC.

On SOME planes this is a "cheap" power upgrade, if the electronics can handle it... but you have to be sure that they can first.

RE: Mini Pulse ?
 

Hi RockEnRoller,

I put a meter on my Mini Pulse last weekend - hadn't got around to it before. Setup is a Park 450, 40A ESC, an APC 10 X 7E and I'm using 3S 2200s as well. In a static test it draws a little over 15A at full throttle and only 5A at half throttle. This explained why I could cruise around the sky at half throttle for ages and not really stress the battery. It balances nicely with the mid point of the 2200 pack just under the hatch magnet.
I think you'll be happy with the flight times from your setup.

Cheers,
Paul.

RE: Mini Pulse ?
 

I just flown my mini pulse xt pnp,yesterday..I i landed it a few times and was fine..On my last flight i was landing it and i had a really soft landing and the landing gear came off,and it took the whole underside with it.I heard a few people who had the same problem with this plane...So i am ordering the mini pulse xt ARF.Does anyone know how i should beef up the landing gear i dont know if epoxy on the inside will really help...Thanks alot,
Danny

RE: Mini Pulse ?
 

just wondering on my mini pulse if i put a eflite 480,there is 2 one is a 910kv,and the other is 1020.will i get more torque with the 910kv,and more speed with the 1020kv.
Thanks ,
Danny

RE: Mini Pulse ?
 

A lot of ARF’s have this issue it seems. I always beef up the area with triangle stock and epoxy on my planes. But on something of this size, you may find access to the area difficult (I don’t have the Mini Pulse to look at).


You are correct in theory…. These two are so close together I don’t think you would notice a huge difference. The main thing you would notice is that flight times with the 1020kv motor will be less as it has a little higher idle current. The motors are the same size and weight and have the same prop range. Using the larger for the 910 kv and the smaller for the 1020 kv motor you will see a fairly significant increase in speed, but using the same prop on both you really won’t notice much.

1020kv @ 11.1v 11322 RPM
910kv @ 11.1v 10101 RPM

RE: Mini Pulse ?
 

Ok one more question...I have the eflite 450,will the efilte 480 910kv,have more speed and torque then the 450...Thank you very much for all the help...
Danny

RE: Mini Pulse ?
 

I do.

Beefing up the gear area is fairly easy. Add a few strips of light ply to widen the load carrying area.

The best thing to do however is to MAKE a "break away" area, so a landing gear collapse does not take a big part of the fuselage with it.

Nylon bolts help with this.

I broke the gear on a small Reactor 3D last weekend where I had purposely not re-inforced the area after a prior gear pullout.

Instead I made the area able to break cleanly off.

During a hard landing, this is exactly what it did, preserving the plane, wing and fuse.

The repair was trivial. Re-insert broken break-away block with epoxy, wait 30 minutes, re-attach gear, fly the next day.

I've flown both motors on a Brio 10.

The 910kv produce anemic performance on the heavier Brio, while the 1020kv produced adecuate but not stellar performance... both motors came out...

I transferred the 910kv to the Mini-Pulse, and found it to be absolutely PERFECT for this plane.

You get plenty of speed, and LOONG flight times with a 1800-2200mAh LiPo pack, while not overloading even a 15-18c pack.

RE: Mini Pulse ?
 

Yes as long as you prop the motor properly.

The 480 can sustain higher current draw w/o building up heat. You have to prop the motor to get the right power input.

Were you to use the prop for the 450 on the 480, and the KV rating is the same, you would find that the performance would be identical.

However the 480 can tolerate a bigger and/or higher pitch prop, producing more wattage...