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May 30, 2004, 10:35 PM
Registered User
meteor's Avatar

Video: Wattage Mig-15 + Mega 16/7/7 @ 80W!


Here it is, the Wattage Mig-15 powered by a Mega 16/7/7 pulling 8A on an E-Tec 1200HP 3S1P pack (3 cells).

At 8A, the E-Tec HP's are barely warm after a 100% full-throttle 10+ minute run. (they're actually closer to 1400 mAh at that rate)

This power system offers nearly identical RPM at the fan as the stock set-up, the performance gains are strictly from weight loss, not more "power".



Due to having to re-build the tail, and the poor elevator servo placement, I needed to add 35g. of lead to the very-front inlet area to balance the aircraft, but it still flies pretty nice!

Adding lead is really wasteful, I guess you could go for a softer wind and add a cell, instead of the useless dead-weight of the lead... (even longer flight times, with the same performance!)

All-up weight is 461g (about 16. oz), the stock set-up and 10xKAN 950's would weigh 173g. more (6 oz., or 40% more AUW!)


Here's the link:
http://204.101.251.229/brianu/mig-15_edit.wmv



Fun!
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May 30, 2004, 11:13 PM
Master of Nothing!!!
ginsu1797's Avatar
Nice!!! I have one waiting to be built. I've been informally on the look out for the ideal power set up. Did you use the stock Wattage fan w/the 16/7? I like the idea of making it lighter.
May 31, 2004, 01:33 AM
Registered User
demetrius's Avatar
hey if thats how it runs with the stock setup thats great! and whats ten bucks for a new 400!


Quote:
Originally Posted by meteor
Here it is, the Wattage Mig-15 powered by a Mega 16/7/7 pulling 8A on an E-Tec 1200HP 3S1P pack (3 cells).

At 8A, the E-Tec HP's are barely warm after a 100% full-throttle 10+ minute run. (they're actually closer to 1400 mAh at that rate)

This power system offers nearly identical RPM at the fan as the stock set-up, the performance gains are strictly from weight loss, not more "power".



Due to having to re-build the tail, and the poor elevator servo placement, I needed to add 35g. of lead to the very-front inlet area to balance the aircraft, but it still flies pretty nice!

Adding lead is really wasteful, I guess you could go for a softer wind and add a cell, instead of the useless dead-weight of the lead... (even longer flight times, with the same performance!)

All-up weight is 461g (about 16. oz), the stock set-up and 10xKAN 950's would weigh 173g. more (6 oz., or 40% more AUW!)


Here's the link:
http://204.101.251.229/brianu/mig-15_edit.wmv



Fun!
May 31, 2004, 03:48 AM
wizard of OZ
james_28's Avatar
that is good to hear and watch as i have a 16/7/6 that i want to put in my f-86 with 3s 1500 kokams
impressive power in the video
May 31, 2004, 09:07 AM
Birds do it, bees do it
ParkJeff's Avatar
Oh darn, now I'll have to get a 16/7 for the Mig I have waiting for me back in Aus . Good reason to get another brushless.

Congratulations on a great combo and thanks for sharing.

Jeff
May 31, 2004, 12:32 PM
Registered User
meteor's Avatar

Stock rotor...


Yup, it's the stock Wattage "PowerFan" rotor.

But, I suspect a slightly cut-down MiniFan 480 rotor would be more efficient, and you might trade some thrust for speed, which would be fine in the "lightweight" version.


The 16/7/6 might be a bit too hot a wind for the Wattage rotor and the Kokam 1500's, but I don't have one to test.



demetrius, don't forget that the stock Speed 400 motor almost weighs twice as much as the 16/7/x, and is far less efficient...



Good Fun!
Last edited by meteor; May 31, 2004 at 12:34 PM. Reason: additions
May 31, 2004, 10:29 PM
Registered User
Super cool! I always thought that these motors are great for this low draw use in ducted fans under 60mm - the Kv is just right and they got 6 pole rotors which means that they actually spin the fan, not just heat up the exhaust Much better than Hacker B20 IMHO. Very glad to see it fly so well.
Jun 01, 2004, 12:59 AM
Master of Nothing!!!
ginsu1797's Avatar
Quote:
Originally Posted by meteor
Yup, it's the stock Wattage "PowerFan" rotor.

But, I suspect a slightly cut-down MiniFan 480 rotor would be more efficient, and you might trade some thrust for speed, which would be fine in the "lightweight" version.

Good Fun!
Cool, thanks for sharing! My Mig just got bumped up a few notches on my "To build list" I really dig your power setup. What are your thoughts on Thunder Power 2100s for this set up? I have a few just sitting around. I have to compare pack weights. I'm wondering how much weight I can gain and still have it fly as nice as yours.
Jun 01, 2004, 01:20 AM
Vault-Tech Approved
Racebelly's Avatar
demetrius,

My stock Mig 15 didn't fly anywhere near that good. The weight savings of the motor & batteries obviously makes a huge difference.

-Mark
Jun 01, 2004, 02:06 AM
The blade numbers go up to 11
stumax's Avatar
That's awsome performance from 80W! I wonder how it would go with a Vasa55/ Hacker B2012L? How much thrust do you think you have? I got the idea this plane was supposed to be a dog? (except Herbs!) Looks like it may be good for an easily handlaunched plane to fly at my local park (shame the Panther has nowhere to hold on to for launching!).

Stu.
Jun 01, 2004, 10:51 AM
Registered User
demetrius's Avatar
Quote:
Originally Posted by stumax
That's awsome performance from 80W! I wonder how it would go with a Vasa55/ Hacker B2012L? How much thrust do you think you have? I got the idea this plane was supposed to be a dog? (except Herbs!) Looks like it may be good for an easily handlaunched plane to fly at my local park (shame the Panther has nowhere to hold on to for launching!).

Stu.

Stu what does herb has in his plane? and how does it comepare to this one. Oh and meteor, dude that was awsome! Great job! i might build mine with that setup.
Jun 01, 2004, 11:48 AM
Watts your motivation
roccobro's Avatar
I ALMOST bougth a 16/7/7 last night after showing my wife the video. She really liked the launch as she could never get it going that good for me

I wonder what a new chilipepper motor rated the same as the 16/7/7, that has a supposed 87% eff do in the plane? 12 minute flights and a little more power??

*foaming at the mouth* gotta build my second F-86 NOW *foaming at the mouth*

Justin
Jun 01, 2004, 01:30 PM
Registered User
meteor's Avatar

Weight...


Stu, I'm not sure that a Vasa 55 would really make that much of a difference. (actually, you'd use the Vasa 64, not the 55)

The Vasa shroud would save you a few grams (about 10), but the Vasa rotor is just as heavy as a MiniFan 480, nowhere near as efficient, and prone to exploding.


Also, the Hacker B20-12L is quite heavy, so you might as well go for a Mega 16/15/x. But, what's the point? You're just going in the vicious circle of weight gain/power gain...


My guess for best performance would be a turned-down MiniFan 480 rotor (about 2.5mm), and a Mega 16/7/6 (or 5) and a 3S 1500-2000mAh Li-Po pack pulling about 150W.

This power level would be optimal for max motor efficiency, and the larger cells would eliminate the need for the lead in the nose.

So, it's win-win, as you stay at the same AUW, gain efficiency from the rotor, and have a lot more power and efflux velocity to boot!



I -will- be doing this as I have new F-86 and Mig-15 kits on my shelf, and a spare MiniFan 480 rotor/spinner!



Yahoo!


P.S. The Mig in this video was a "crashed" one I got from Kyril via the For-Sale group!
Jun 01, 2004, 03:26 PM
Watts your motivation
roccobro's Avatar
How much can the Mega ACn 16/7/7 handle? How about another Lipo cell to up the voltage, or sligthly larger pack to make up the lead weight difference and provide a little more current? Would the motor survive with more V or A, or is 80W a walk in the park for it, or is this just the motors "sweet spot" and we should kiss Meteors feet for finding it?

Thanks,
Justin
Jun 10, 2004, 01:57 PM
Enjoying the good life!
Aobid's Avatar
That's awesome!