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Power Systems Talk about motors, ESC speed controllers, gear drives, propellers, power system simulators and all power system related topics

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Old 11-07-2007, 02:55 PM   #1
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Default Mini-mag Power

I'm considering buying a Mini-Mag kit. It comes with a brushed motor.
Does anyone know if my 7.4 lipo would be enough power for it.
It's a none discript i.e. no name battery that came on a park flyer.
I don't know the c rating but it is 1800 mah

John
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Old 11-07-2007, 03:00 PM   #2
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I had a Mag, and as I recall, I used a Warp4, 4 turn or 5 turn with a two cell-if flew rather well. As to the brushed motor, it's a 6 volt one as I recall and so it should be more than enough! The problem as I see it is that the brushed motor is very, very marginal with this airframe.

Anyway, it's a wonderful airplane so have fun but be sure to make it with MAXIMUM elevator throw for better landings!
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Old 11-07-2007, 04:37 PM   #3
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Thnx Dave. Maybe I need to look for a brushless?
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Old 11-07-2007, 04:41 PM   #4
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Originally Posted by celticflyer View Post
Thnx Dave. Maybe I need to look for a brushless?
My unqualified answer is "YES!" The mini flies like a dream with a brushless power system. I recommend a 3s 2100 mah lipo and an inrunner of some kind-as I recall, my "best" power system included a 5 turn, Warp4 (now gone?). Using an inrunner avoids all the problems of modifying the airframe to take an outrunner-be sure it's a "drop in" speed 400 replacement, and many are available.

The mini is a wonderful airplane.

By the way, if you have not built it yet, ignore the Teutonic instructions which state that in assembling the fuse you put ca on one side and accelerator on the other! Maybe Germans can move that fast but I couldn't!
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Old 11-07-2007, 07:08 PM   #5
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Originally Posted by celticflyer View Post
Thnx Dave. Maybe I need to look for a brushless?
It would be worth your while to talk to David Skokan at www.lightflightrc.com - he has several 28mm inrunners which could be used with 2s - if we assume your pack can manage 15-18A (10C 2s 1800) then a 28-37-4 might be good, or a 28-47-3 (both of those might spin something like a 9x4.5 on 2s at ~17A).
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Old 11-07-2007, 07:15 PM   #6
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Use a 3s: you will NEVER regret it, and a 2100 pack fits neatly under the wing! 20-30 minute flights!
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Old 11-07-2007, 07:57 PM   #7
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Thanx Dr Kiwi and Dave. I'm really going to have to bite the bullet and invest in a couple of 3s as My 2s won't hover my NASTY. But I still need to find a use for my 2s, thats why the question. I need a plane to train my grandsons next year and the MiniMag really looks good.
John
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Old 11-08-2007, 02:39 AM   #8
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Even on 2s, and limited to say 15A by the pack, a 28-37-4 would provide much more power than the stock can motor.
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Old 11-08-2007, 02:50 AM   #9
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I did fly my Mini with a 2s, and, I think a Warp4 5 turn-I was using it as a trainer and had a blast, so it can be done, with fun!
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Old 11-08-2007, 04:52 AM   #10
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My buddy has a Park 450 outrunner in his and it is just way too much fun flying with a 10X8 prop. The outrunner wasn't very hard to mount.

CTD
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Old 11-08-2007, 05:16 AM   #11
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They aren't "hard" to mount, but why bother if a better solution exists?
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Old 11-08-2007, 06:20 PM   #12
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Originally Posted by Dave Matison View Post
Use a 3s: you will NEVER regret it, and a 2100 pack fits neatly under the wing! 20-30 minute flights!
I have some TP 2000 3s packs they are a little wider than the 2100's.

2100 dim's 3.94 L x 1.34 W x .79 T
2000 dim's 2.56 L x 1.97 W x .79 T

Do you think that there is enough width under the wing to fit these in?

I have a dremel and will modify.

I really don't want to buy new cells for this plane, so I hesitate to even order the plane until I have a pretty good idea that I am going to be able to squeeze the 2000's in.
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Old 11-08-2007, 06:51 PM   #13
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I used, primarily, a Hyperion 3s and I'm measuring the dimensions, now, as, 22 mm wide, 36 mm high and 100 mm long.

From what I recall, you can park a car in there!
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Old 11-12-2007, 03:18 PM   #14
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Thanks Dave, I will put the Minimag at the top of my Christmas wish list.
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Old 11-18-2007, 07:01 PM   #15
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Default Minimag Power ????

Hi everyone,

I'm glad to subscribe to this nice forum.

I'm going to buy a Minimag kit in my local rc shop and get the electronics from Internet.

I read lots of stuff about the minimag especially on adding power from the stock version.

Assuming that I have the kit, the receiver/transmitter & 3S 2200mAH 25C (240g) lipos.

1/ Can I get the TowerPro SG-90 Micro Servo instead of the Hitec HS55?
http://www.himodel.com/radios/TowerP...cro_Servo.html

2/ Which esc/motor combo to buy ? I found this which seems to be a great buy for the quality/price :

ESC (30$) : HiModel Balancer Series 25A / 35A Brushless ESC Type BALANCER-25A
http://www.himodel.com/electric/HiMo...ANCER-25A.html

Motor (30$) : HiModel 1260KV Outrunner Brushless Motors W/ Prop saver Type Max-BL2215/20
http://www.himodel.com/electric/HiMo...BL2215_20.html


3/ Do I need something more ? like propellers or else ?

4/ Would you propose me a better setup ?

If you wanna help me, I'd like to thanks you for your time.

CÚdric
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Old 11-18-2007, 07:03 PM   #16
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Where are you located?

Your whereabouts will affect my recommendation regarding power systems and sellers.

Though I like 55's, I have had fantastic success with HobbyCity 9 gram servos and usually order 20 at a time-though they have rather short leads.
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Old 11-18-2007, 07:07 PM   #17
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Hi Dave,

Thanks a lot for your feedback. I'm in south France. I wanna get the electronic on Internet because of the $ value compared to the euro.

I'm used to buy stuff for my rc heli (been into helis for 2 years, quite nice level).

I prefer to pay via paypal. I'll order with EMS shipping so I get the stuff really fast.

After looking a while I found that the Himodel are really maybe the best setup for the minimag. For the motor this one rocks also but more expensive :

http://www.quietrcflying.com/Product...id=HP-Z2213-20

The Himodel combo seems polyvalent and not expensive.

CÚdric
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Old 11-18-2007, 07:17 PM   #18
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Pity you have to live in such a beautiful place! Say, that new President is a pistol!

Well, I highly recommend the HobbyCity/United Hobby 9 gram servos, and I fly them in some rather expensive planes-just be sure to get servo extensions because the Mini will need them.

The Mini is a wonderful airplane!

I recommend a Warp4, 6 turn INRUNNER, which is apparently out of production but still around. Try nesail.com, which I think has them for $30, or basicially free to someone using Euros! (thanks, Bush, for all your help!)

I used a Warp4, 6 turn because it required NO modification of the mount (it's a speed 400 "drop in"), and it gave me great thrust and efficiency-I think I used an 8/6 apc slo fly prop and 3s, 2100 lipo, with a castle creations 25 amp esc. But, Hobby City has some very nice esc's for almost nothing-get the little usb programing device.

Have you assembled the Mag, yet? If not, ignore the Teutonic instructions which provide for CA on one side of the fuse and accelerator on the other, UNLESS you are faster than corn through a goose! (you know, the foie gras thing).

You picked a great flyer and be SURE to have full elevator (pitch) control available because it makes the landings less embarassing!

Regards, Dave in Sunny Seattle

(P.S.: I didn't realize the dollar had an value. Well, I hope your Fearless Leader is better than ours!)

(Second P.S.: I found the Mag flew better with more than 150 watts at the prop-the Himodel "looks" to be less, so I move up, and, again, an inrunner of the right size just "drops in!")
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Old 11-18-2007, 07:26 PM   #19
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hehe Dave, I agree about the pistol

I'm gonna mail the guy at nesail.com about the Warp4. But do you think it's a best buy and better than the Himodel ? I don't really care about doing modifications in fact, just wanna get HUGE amount of power on this plane.

Which ESC would you buy if you were me (url? cause there's so much stuff in hobbycity!!) ? I wish I could buy everything from the same shop. That's why I posted the Himodel urls ...!

Which servo too, it seems the 9g are out of stock (again url? cause there's so much stuff in hobbycity!!)

But maybe I could get the warp from nesail and the esc + servos @ hobbycity - ?

Thanks a lot Dave,

CÚdric
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Old 11-18-2007, 07:47 PM   #20
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The Warp4, 6 turn is capable of more than 200 watts! I have one just waiting for a new home! As for huge, try lightflightrc.com (california)-they will gladly design a power system for your specifications!

Since you are spending real money, why not go for "the best."

As for servos, try servocity.com for the Hitecs.

NEVER "backorder" from HobbyCity.

Take my word for it, 200 watts on the Mini Mag will (1) allow you to keep a 35 hour work week, (2) go vertical, and (3) fly any rational maneuver.

For more alternatives, and I hate to send you there, go to rcgroups.com and search for "mini mag." There are many, many inrunner and outrunner systems already proven for you! But, as far as I'm concerned, you best cross yourself before going! (look for the sign "666" as you enter!)

If you have any further questions, feel free to send e mail to dmatison@msn.com to avoid this interface.

Man, that guy had a good-looking wife-what was that all about?

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Old 11-18-2007, 07:58 PM   #21
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Thanks dave,

I add ya to my msn, it will be faster.

I'm gonna get this Warp4 6 turns If I can find it somewhere

If I get the servos from servocity, I'm gonna get also the ESC .. That will be OK for shipping

http://www.servocity.com/html/c-25_speed_control.html

is that OK for the Warp4 ?

CÚdric

PS: http://lightflightrc.com/ Damn Nice website.
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Old 11-18-2007, 08:25 PM   #22
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Dave I thought this forum was about electric, not degrading our leader!
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Old 11-18-2007, 08:25 PM   #23
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Originally Posted by okayplayer View Post
Thanks dave,

I add ya to my msn, it will be faster.

I'm gonna get this Warp4 6 turns If I can find it somewhere

If I get the servos from servocity, I'm gonna get also the ESC .. That will be OK for shipping

http://www.servocity.com/html/c-25_speed_control.html

is that OK for the Warp4 ?

CÚdric

PS: http://lightflightrc.com/ Damn Nice website.
http://www.nesail.com/detail.php?productID=3405 for Warp Specs! That esc is o.k. and will work-I suggest a Castle Creations Thunderbird 18 or 36, or Phoenix 25 or 35-these are programmable (the easy way, with a cord) and outstanding products. If you need a "best price" source for cc, let me know.

If you need help getting the Warp 4, let me know-I'll be glad to help, but I suspect Northeast sailplanes exports, too! I have one of their Viking models-man, what a ship!

Anyway, you will love the Maggie.

Regards, Dave
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Old 11-18-2007, 08:27 PM   #24
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Originally Posted by celticflyer View Post
Dave I thought this forum was about electric, not degrading our leader!
You are right, of course. As if he needed my help! He has done a fine job all by himself.

Hey, logical relevance is anything which tends to make more or less probable the existence of the fact in issue, right?

Gee, I come here not to praise Caesar....
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Old 11-19-2007, 08:46 AM   #25
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Hi Dave,

Wouldn't the warp 4-5 kv1430 be a better choice than the warp 4-6 kv 1190 ?

Thanks for the information,

I still have no reply from nesail anyway I'll buy everything @ http://www.aircraft-world.com ; they have a great service & email support.

for the esc, I heard this one was good :

http://aircraft-world.com/shopexd.asp?id=4370

http://aircraft-world.com/shopexd.asp?id=4368

and also I should get that http://aircraft-world.com/shopexd.asp?id=4264

CÚdric
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