Bret1

I have been told that a Mega 16/15/3 will work good on Combat Wings XE2 flying wing with 25 amp esc and Thunder Power 3-cell 2100 Li-Polys. Does anyone suggest a different motor manufacturer that will give me a better output? I am also wondering if I would be better off going with a 35 amp esc. Thanks,

NMPhi767

Mega Motors are pretty awesome. The 15/16/3 has some pretty high RPMS and I don't know of other brushless motors that will give you the kind of RPMs you need for around 80 bucks. If you want a smaller can, a Himax 2025-5300 has a 20 mm diameter. It puts out 5300 rpms for every volt in the battery (w/o a prop of course). It should give you thr rpms you need for this wing and it is slightly cheaper. Getting a higher amp ESC is only necessary if you can draw out more amps from your battery. A TP 2100 will not draw more than 25 amps, I think that they are rated at 6C so you can only get 12.6 amps. You would have to run 2 of them in parallel to max out the esc.

I think that TP has some 10C batteries hitting the market. In this instance, a 2100 mah battery will give you 21 amps. Tanic also has 10C 3 cell 2200 mah li-po's (22 amps) and 10C 3 cell 2600 mah lipos (26 amps) but good luck finding them.

Matt Kirsch

My Feedback: (21)

The Mega has a Kv of 3000 RPM/Volt versus the Himaxx's 5300 RPM/Volt. On the same prop, you'll get more R's out of the Himaxx, but it will also consume more Amps. In fact, the Himaxx really isn't suitable for direct drive with such a high Kv; it probably won't turn more than a 3" prop without drawing more Amps than it's designed for. It's meant for deep gearing, like in the 6:1 range as you'd find with GWS gearboxes.

With electric motors, there are no porting tricks that manufacturers can use to give their motor an edge over everyone else's like you see with glow engines. There aren't nearly as many variables, so what you see is pretty much what you're going to get. One manufacturer's 3000 RPM/Volt motor will spin at nearly the exact same RPM as another manufacturer's 3000 RPM/Volt motor, will draw nearly the exact same amount of current, AND will produce nearly the exact same amount of power, using the same prop, ESC, and battery. That's just the nature of electric motors. The only reasons for picking one brand of motor over another are:

1. the suitability of the motor for the application
2. quality
3. price

If you can find a Himaxx with a Kv of around 3000 RPM/Volt that can handle 10 cells (aka 3S LiPoly) and about 30 Amps, then you can compare it to the Mega 16/15/3.

Bret1

Thanks for the advise. I'm sure I will end up going with the Mega. I have only heard very good things about them. However, since the new Li-Poly's should become more available very soon, I will probably wait for them. So that brings me back to the esc. If the Li-Poly's are capable of 10c nominal and 15c burst...

2100 mah = 21 amp nominal, with 31.5 amp bursts
2200 mah = 22 amp nominal, with 33 amp bursts
2600 mah = 26 amp nominal, with 39 amp bursts

I will probably want the 2600 mah if I can get them. I know I won't be flying WOT all the time, but will the 25 amp esc still be able to handle these without problems?

NMPhi767

The Phoenix 25, which is a great ESC can handle 25 amps continuious and 40 amps surge. The Phoenix 35 which is about 25 dollars more can handle 35 amps continuous and 50 amps surge. I highly recommend these ESC's by Castle Creations. They give a full range of throttle and are fully programmable.

TheJester

I've got the Mega you're talking about and the Hacker a20-6xl. The Hacker has just a tad LESS rpm, but has more torque and I'm able to use a 6x5.5 prop with a 45 amp ESC. It saps my 3000mah pretty fast if I use it hard, but MAN does it move.

SS2P

Check out Warp 4 motors. Probably a 3 or 4 turn. They are available at NSP and they are more affordable. You should also check mega 16/15/4 for XE2. With the 16/15/3 you should go with 4.75 x 4.75 for ultimate speed and 5 x 5 ( I'm not sure) that should do.
Another alternative is E-flite six seriers inrunners.

Paul