Need Help ID of Old Motor

[ChristopherM]

I have an Astro Challenger Cobalt geared motor that I cannot find any info on. The box is marked Cobart 05 geared system stock no 6505G the date of testing on the box reads January 1993. Does anyone know what voltage this motor requires or prop size or anything about it. It is brand new but I have no paper work. I called Astro Flight but they could not help me.

Thanks
Chris

[CrimzonRider]

does it look like this?

http://compare.ebay.com/future/18107...sort=BestMatch

cr


http://solorcenginespartsaccs.info/cobalt/

same post time...lol....think slipstick links are better!

[slipstick]

Try http://loke.as.arizona.edu/~ckulesa/propulsion.html

IIRC the 6505G is the standard Astro Cobalt 05G with the 2.38:1 gearbox. We used to use them on 6 or 7 cells (NiCd) at around 25-30A.

Steve

[Wildflyer]

The Astro Cobalt 05 in it's time was a very powerful motor, well above the standard silver can 550 brushed motor.
It was available in a straight drive, side geared reduction, and planetary geared reduction. From what I could find out it was supposed to max out at about 235 watts.

I had the 05 side geared motor in a Goldberg Electra.
I believe I ran a 11/8 prop on 7 cells.
With a normal nicad pack it climed out very well at about 45 degrees.
With a Koyosho 7 cell matched low resistance racing battery pack, it went like a dang rocket, almost straight up.
All I had was a servo operated switch, no speed control.

It's a good motor, that has been passed up by new technology.
Now a 250 watt motor weighs so much less, plus the same battery power weighs so little, and a speed control is 1/4 of what I had, that when I restored the Electra I took 12 oz out of it.

[ChristopherM]

[ATTACH][/ATTACH]This is it,sorry for the bad pictures.

[kyleservicetech]

Originally Posted by ChristopherM

I have an Astro Challenger Cobalt geared motor that I cannot find any info on. The box is marked Cobart 05 geared system stock no 6505G the date of testing on the box reads January 1993. Does anyone know what voltage this motor requires or prop size or anything about it. It is brand new but I have no paper work. I called Astro Flight but they could not help me.

Thanks
Chris

Yeah, back in the mid 1980's I had three of these motors (Plus an Astro 15, 25, several 40's and a 90). With the gearbox, they were pretty much designed for 7-8 NICAD cells. I did really hop one up for 10 cells, putting a whole slew of aluminum radiator type fins on the motor shell to keep it from melting. In it's day, these motors were really expensive. And, they really went through the special expensive brushes. The last Geared 40 I had used a brass motor pinion, and an aluminum driven gear. Those things wore out in about 50 or 75 flights, even when I sealed them up in high speed grease.

But nowdays, even a cheap China motor and ESC would cost a fraction of these Cobalt geared motors, and would out perform them perhaps 4 to one.

[Azarr]

FWIW, when they say cells, in this case it means nicads or nmhd, not lipos.

Azarr

[kyleservicetech]

Originally Posted by Azarr

FWIW, when they say cells, in this case it means nicads or nmhd, not lipos.

Azarr

Good point!

Putting an 8 Cell LiPo on an Astroflight 05 Geared motor would instantly wipe it out, even with a little prop on it! (The commutator will arc all around itself. That arc over will result in a dead short between the brushes. Don't ask how I know)

[choenny]

Saying thanks will not just be enough, for the wonderful clarity in your writing. I will immediately grab to stay abreast of any updates.