Author Topic: Setup advice for my Electric Glider  (Read 10994 times)

error404

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Setup advice for my Electric Glider
« on: July 29, 2010, 09:56:26 AM »
I am setting up my electric Glider pictured here. 2mtr wingspan. No ailerons.



I am going to use a Race 700 Speed motor. (originally there was one in it, so will stick with the same).


Specifications:
Operating voltage range  7,2...9,6  V
Blockierstromaufnahme 90  A
Diameter 44,5  mm
Free shaft length 10,5  mm
Case length 66  mm
All-up weight, approx.  362  g
Maximum efficiency 69  %
No-load current drain (A)  3,3  A
Charging rate at max. efficiency 17,5  A
Permissible motor direction  R und L  
No-load speed 19000  U/min
Nominal voltage 9,6  V
Shaft diameter 5  mm

My question is what speed controller would be best and what battery also would you recommend?

Thanks

Anthony
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Happy Days

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Setup advice for my Electric Glider
« Reply #1 on: July 29, 2010, 15:42:56 PM »
Don’t know many Brushed motor speed controllers Anthony. They are rather ‘old technology’ and in-efficient compared to modern brushless motors.

Out of curiosity, is there any particular reason why you want to use that motor instead of a brushless equivalent?  

Keith
Try not to run out of airspeed, altitude and ideas....... all at the same time.

error404

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Setup advice for my Electric Glider
« Reply #2 on: July 29, 2010, 15:56:26 PM »
Keith,

I have one of these speed 700 motors new and still in the box. I want to use it as this was the original type of motor in the plane. Shame to leave it unused. I also have the folding prop for this aswell.

I have an 8 cell 1500NiMH battery which i am thinking of using.

What type of brushless motor would you think would suit this size of plane? Just out of curiosity.
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Happy Days

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Setup advice for my Electric Glider
« Reply #3 on: July 29, 2010, 18:53:58 PM »
Hey Anthony,
Without knowing the weight of your model I wouldn’t know what to suggest. There is no direct method (that I know of) to establish a brushless outrunner equivalent of your brushed motor. :!:

However,……………the manufacturer ‘AXI’ make very good outrunner brushless motors. (I can vouch for that.) http://www.modelmotors.cz/index.php?page=1 On the right hand side of the above link they have a calculator to establish which of their range would work best in your model. (Shown as "Fast AXI Setup")

Once you’ve established the brushless spec needed to fly your plane you could then look to other (cheaper) manufacturers for the same spec motors from their range. :wink:

As you probably already know, brushless motors use less current to produce the same amount of power at the prop than brushed motors, so you get longer flights from your batteries. :D

Might take you some work to modify the fuse though :(

Oh well, No Pain = No Gain!
K.
Try not to run out of airspeed, altitude and ideas....... all at the same time.

error404

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« Reply #4 on: July 29, 2010, 19:18:53 PM »
Modifying the fuse is definitely something I wanted to avoid.

Will have a look at the calculator once i way the model and see whats available.

Thanks
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JohnPearson

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« Reply #5 on: July 29, 2010, 21:41:53 PM »
Hi Anthony

I have a 400 brushed motor and speed controller lying in the workshop, I never use it anymore, therefore if you want it, let me know. It was used in a zagi wing, some years ago, still works, I think? e-mail your address and I will post it to you.

JohnP

IceWind

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Setup advice for my Electric Glider
« Reply #6 on: July 30, 2010, 00:35:18 AM »
Check on the speed control but if it's sized for the speed 400 it'll could be short for the 700.
The speed 400 can "eat" from 4 to 17A depending on the version. (4,8v, 6v or 7,2v)
This 700 is a Amp's eater it can go up to 65A still if you go direct with a ~10'' prop it should require ~35A.

I'm not sure if I got it here if so I can get you a JETI 35, it is also attached to a paperweight. (speed 400) :)
..Nando

error404

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« Reply #7 on: July 30, 2010, 09:19:29 AM »
John : Thanks for the offer. I have a speed 400 brushed motor with speed controller at the moment on another plane. This motor would not be powerful enough to pull this plane.

IceWind : Thanks also, I am doing some research on this and will find out what speed controller suits.

Thanks everyone for the advice, I am checking some things on the net which hopefully will give me the info i need, will post results later when/if i get a good solution.
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error404

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« Reply #8 on: July 30, 2010, 10:35:09 AM »
Update

A 60 amp brushed speed contoller is recommended but I have been told that since i am using a 10-6" folding prop that i would get away with a 45 amp brushed speed controller along with my 8 cell battery.

Will keep browsing the net, plenty of advise/tips out there once you dig a bit deeper.
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