Astro 020 power system - RC Groups
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Feb 08, 2001, 09:01 AM
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JohnM's Avatar

Astro 020 power system

Has anyone ran the Astro 020 pylon (6 turn) motor on 6 cells? I was thinking of getting a sensorless 6 turn 020 and running it on six 2000mah NiMh cells with the new Jeti18 controller with a MA 5.5x4.5 prop. Does anyone have any specs on this combo? If the average current was 15 amps, the run time would be 8 mins.
Power system weight would be about 12 oz:
Astro motor - 2.3 oz
6 cell pack of 2000mah NiMh - 9 oz
Jeti18 controller - .75 oz?
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May 14, 2001, 05:45 PM
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Thatīs interesting. Iīm really interested in the sensorless 6T 020 pylon as well and have thought about running 6 700AR cells (just got 32 700AR cells!) and 7 cells for racing.

May 14, 2001, 06:18 PM
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Lenny970's Avatar
I've got a 6 turn 020 running in my Twister. I'm running on 6x700AR's and 4.7 x 4.7 prop. This pulls about 17 amps right off the charger. Nice combination in this plane -- good power, adequate duration, and low weight.
May 14, 2001, 09:45 PM
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dave morris's Avatar
ditto, I use the 6t 020 on my Flea, 6 500ars or 600ae's. about 100 watts into a 13 oz plane really cooks. flight times about 4-5 minutes, I only use full power for short times as the flea would prob fold a wing, and always back off in down or turn. I think the rpm on a 4.75*4.75 was about 19000. Recently retired the 020 in favor of a 010 12t and a jeti, no fear of folding wing, but still pretty fast (70 watts 14K same prop), and avg 9-10 min flights on 500 or 600ae's.
May 17, 2001, 12:50 PM
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JohnM's Avatar
Originally posted by dave morris:
Recently retired the 020 in favor of a 010 12t and a jeti, no fear of folding wing, but still pretty fast (70 watts 14K same prop), and avg 9-10 min flights on 500 or 600ae's.
Have you had any overheating problems with your 010 setup? I recently had a 16 turn motor overheat since the weather turned warmer. I was running it on 9-600AE cells with the Jeti-06 controller. The motor was permanently damaged.
It was working fine at below 30 degrees F.
May 17, 2001, 08:02 PM
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dave morris's Avatar
not at all, and I have a bunch of flights on it. I fly in central florida often in 90+ heat. If you note my flight times of 10 minutes it becomes clear I am not using but about 4 amps avg during the flight, most of the time I flight at about 40-50% power. Only use full (10 amps) for short burst like on the up line of a loop. then back to low and maybe shut down for a little thermal hunting. I think this is the right way to set up a power system, if it can handle full power from start to finish with out straining then it is not being pushed hard enough (pylon racing excluded).
May 17, 2001, 08:34 PM
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[QUOTE]Originally posted by JohnM:
[B] Dave,
Have you had any overheating problems with your 010 setup? I recently had a 16 turn motor overheat since
hi John,

how many amps were you at on the bench.
I have an 010 with the Shultz (sp) and in tests I'm getting 6.6 amps ,sounds a little high to me.
May 18, 2001, 07:53 PM
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JohnM's Avatar
Just ran some tests:
8-600AE cells and a MA 5.5x4.5 prop
Stock Jeti-06 controller - about 7 amps
Astro software modified Jeti-06 controller - about 6.5 amps
Astro on/off controller - about 5.5 amps

I didn't measure it again, but with the stock Jeti-06 controller and 9-600AE cells, the static current will be over 7 amps. What cells and prop were you using to get 6.6 amps?
May 18, 2001, 08:23 PM
Registered User
nine 720 nimh, but I was running the cam 4.7x4.7.
So you have already got your motor back and running again?
The 6.6 I had alarmed me enough to order a 5x3, though I am not sure what amps that will run at.Anyway, you feel you were over 7 amps when you cooked your motor? I did put my finger on the 010 and decided it was to hot for comfort.
May 19, 2001, 02:44 AM
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dave morris's Avatar
Hey guy's are you running these things at that setting (6-7 amps)for extended periods? I find it responds well to hi-currents as long as you back off a little in flight.
May 19, 2001, 10:16 AM
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JohnM's Avatar
When I damaged my 010 motor, I was running it with the stock Jeti-06 controller with 9-600AE cells and a Gunther prop (approx. 5x4) on my 010 powered Manx.
I had 2 packs fully charged. I flew the first pack at full throttle through the entire flight. The flight was between 5 and 6 minutes. I landed and after aprox. 5 minutes I started flying with the second 9-cell pack. The plane was noticibly slower during the beginning of the flight and as I was doing a low pass over the runway, the motor made an awful sound and quit. After landing, I inspected the motor and the rear cover of the motor case and the rear bearing had come off. I assume due to overheating. The motor was sent back to Astro and I paid $60.00 for a replacement.
I think the jeti controllers cause the motor to heat up much more than the stock on/off controller. I have heard that they over advance the motor. I will be now be using an on/off controller with 3 extra FETs stacked on the existing 3 FETs on my Manx. I found the on/off controller very suitable to the Manx as I found it difficult to keep it under full throttle with jeti controller anyway. The stock jeti controller is now on my 010 powered Lil Hornet and is doing well on that plane as the motor is installed in the open breeze for maximum cooling. I run it on 8-350mah nicads and 9-720mah nimhs with a gunther 5x4 prop. The motor doesn't get hot at all, even after 3 successive flight, with no cool down time in between flights.

I am charging up a 9 cell pack now and will post some results.

I have not tried it yet, but I am hoping to be able to run my Manx on 9-600AE cells again with the modified on/off controller.

Dave, how do you limit your full throttle flying? I find it too tempting to push the stick forward and leave it there I would always limit full throttle when I was using speed400 motors only to increase duration. With the 010, you can get great duration even at full throttle flights. I think you are correct, that the motor can easily handle high currents but only in short durations unless there is exceptional cooling. I had no problems with the motors when the temperature was below 30 degress, only problems with my fingers freezing.
May 19, 2001, 12:58 PM
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dave morris's Avatar
Maybe its the 12t, hotter wind gives me more than I need (10 amps) I got into the throttle managment mind set flying pattern and helo's. Pattern for constant speed in up and down lines and helos require as much throttle (collective really) control as any other control surface. I was wondering what could go wrong until you mentioned the back plate coming off. I had to dissassemble my 010 recently and found it was retained with a little glue and a not very tight fit. I can see how heat could soften the glue.

what are you flying, what kinda of weight, curious about how this motor is being used. I have mine in a DMA Flea, 7 600ae's, jeti 18bl, AUW about 13.5 oz
also use 500ar's and 1000 nimh, all 7 cell's. I like the 600ae's the best (cheap,light, good duration).
May 19, 2001, 07:38 PM
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JohnM's Avatar
Yes, the glue must have melted due to the high temperature. I don't know how the ball bearing is held in, but that came off too.
My 010 powered Garrison Aerodrome Manx weighs about 16 oz with the 8-cell 600AE pack.
I also use the 010 motor in a Speedy ARF, (about 15 oz) and a Lil Hornet (about 12 oz)
I too prefer the 600AE cells over the 720 nimhs.

I took some more current readings with a 9-cell pack of 600AEs and a Gunther 5x4 prop.

Stock Jeti-06 controller - about 8 amps
Astro software modified Jeti-06 controller - about 7 amps
Astor on/off controller with extra FETs - about 6.25 amps

Note that these were intial redings and the currents dropped about an amp in less than 30 seconds. The current with the on/off controller dropped to about 5.5 after about 30 seconds and dropped slowly from there.
I wish I had a tach to verify if the Jeti controller actual runs the motor that much faster to make up for the increased current.
May 19, 2001, 07:50 PM
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dave morris's Avatar
I did some tach testing between the jeti and schulze, very little diff between them at full power but the schulze was consistantly better at part thottle (same rpm at .5 amp less power. Greg S explained this was due to timing being fixed in the jeti, where as the schulze would adjust itself for optimum performance. Don't know if the price justifies the difference but might be depending on what you are after (I plan to use the schulze in my minx because I do fly at part throttle a lot).
May 20, 2001, 06:48 PM
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JohnM's Avatar
It sounds like the schulze controller is much more effficient than the jeti. Is it an 18 amp controller? Will the schulze run two 010 motors at the same time for a twin setup?
I flew the Manx with the 9-cell pack with the on/off controller this morning. No motor or controller meltdowns.

Is that the EDF minx? Are you running the 14 turn 010 in it? I was wondering if the 010 was capable of running in a ducted fan. Will the 16 turn work? I am hoping to try EDFs next year possibly. I would love to get a small f-16.

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