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Elec-Helicopters New or Limited Activity
E-Sky › extreme 10 tooth rear pulley and shaft
01-13-2010 06:16 PM  8 years agoPost 21
Melnic

rrElite Veteran

Columbia, MD,USA

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G401B does not like vibrations or temperature changes. If you have vibes, then the vibe RPM will reduce as the pack discharges. I have found the drifts on the 401B typically has to do with vibes. My HBK2 is not smooth at all with vibes. The G401B was nasty with it. I put a more forgiving cheap gyro on it (ColcoGY400) and it was better but still would small drifts. But it did not bother me till I tried to flip it and the tail shot out 90 degrees nearly.

The converted Futaba GY401 was awesome and I"ve got the stock tail mechanics and about 2800-3000 headspeed. My last flight, I pointed it to the back door, took off and hovered I think 3-4 minutes at least with zero drift and it was about 35F outside.

The best luck I had with a G401B was in an EXI 450 CF SE version that has very little slop in the tail and I put Zeal gell tape under the gyro. It drifted very little if I let the gyro temperature stabilize w/ the environment.

If your constantly moving the tail around in flight or your doing alot of forward flight, tail drift should not bother you. But if your hovering alot, it will be very noticable.

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01-14-2010 01:35 AM  8 years agoPost 22
brettman

rrApprentice

SOUTH DAYTONA FL.. u.s.a.

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hey meinic,I come with the same conclusions with the vibs,I've got them under control for now.changed tail and main shafts,made some blades out of t-rex ones cut at the root,man big difference ,sweet.hey gregor99 that battery (2500) just fit like you said. esc gets pretty hot though so I've been cutting the flights short or the same as if i had a 1500 pack,so i wouldn't recommend it either.o.k. i';; say it you guys were right on.lol.Is flying great right now i can let go of the sticks for about 3 seconds now.thanks for all the comebacks from ererybody,practice practice is the game right now brett

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01-14-2010 01:42 AM  8 years agoPost 23
tryan02

rrProfessor

Canton, Missouri

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mah dont make the battery hotter and should of not made your ESC get any hotter. You changed a lot of stuff so check forbinding.

Although!

The only other thing would be the heli is running harder to try and lift the much heavier battery getting the ESC hotter

No Really I am the club President!!!

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01-14-2010 02:36 AM  8 years agoPost 24
brettman

rrApprentice

SOUTH DAYTONA FL.. u.s.a.

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no mah dont make it hotter but almost doubling the time in the air does,at least thats what im figuring,i'll check for binding also thanx

hey tyran i did the t-rex blade mod works great definitely a difference,sweet

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01-14-2010 02:42 AM  8 years agoPost 25
tryan02

rrProfessor

Canton, Missouri

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but almost doubling the time in the air does
If you present the same voltage to the same motor load (hovering whole flight) the electronics warm up to a constant temp in just a couple minutes and stay there till your done flying.

Dont believe me zero the pitch and run the heli say half throttle for 5 min on the ground with both batteries.

No Really I am the club President!!!

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01-14-2010 04:04 AM  8 years agoPost 26
brettman

rrApprentice

SOUTH DAYTONA FL.. u.s.a.

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I beleive ya,i'll take my whole battery flight training and see what happens,this is the stock esky esc which i hear isn't that great any way

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01-14-2010 04:23 AM  8 years agoPost 27
Gregor99

rrElite Veteran

Western Wa

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It also could be due to the rock'n new G3 pack that is maintaining a much higher voltage under load than your old pack.

Revolectrix Beta Team

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01-14-2010 03:05 PM  8 years agoPost 28
tryan02

rrProfessor

Canton, Missouri

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It also could be due to the rock'n new G3 pack that is maintaining a much higher voltage under load than your old pack.
Wouldn't a high end battery maintain the 11.1 longer lessening the current draw needed to hover actually running cooler?

No Really I am the club President!!!

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01-14-2010 04:18 PM  8 years agoPost 29
tryan02

rrProfessor

Canton, Missouri

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My zippy packs get hot and swell and my PPRC stay close to ambient temp same size packs same flying style.

No Really I am the club President!!!

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01-14-2010 04:31 PM  8 years agoPost 30
brettman

rrApprentice

SOUTH DAYTONA FL.. u.s.a.

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lol yea im getting 15+ min. hovering landing and all,that stock pack was getting weaker after only 5-6 flights,the 1500 one

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01-14-2010 04:37 PM  8 years agoPost 31
Gregor99

rrElite Veteran

Western Wa

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Wouldn't a high end battery maintain the 11.1 longer lessening the current draw needed to hover actually running cooler?
Yes, that would be true, if the load was constant regardless of the input voltage. But that would require a govener or using a smaller pinion to compensate for the higher input voltage. If all you do is increase the input voltage, and change nothing else, a non-governed motor will increase in head speed which consumes more watts.

Revolectrix Beta Team

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01-14-2010 06:41 PM  8 years agoPost 32
Gregor99

rrElite Veteran

Western Wa

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esc gets pretty hot
One other thing. The stock ESC has a linear BEC. If the input voltage is higher with the G3 packs, the linear BEC will have more voltage to bleed off and will get hotter.

Revolectrix Beta Team

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01-14-2010 06:44 PM  8 years agoPost 33
DougsRC

rrProfessor

Mass.

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lol yea im getting 15+ min. hovering landing and all,that stock pack was getting weaker after only 5-6 flights,the 1500 one
brettman, You should limit your flight time a little, your batteries will last longer. 15 minutes is a long time for electric, I usually go for about 6 minutes, you could probably go 7 or 8 minutes just hovering around but if you push it the packs will be discharged too low , shortning thier lifespan.

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01-14-2010 08:17 PM  8 years agoPost 34
tryan02

rrProfessor

Canton, Missouri

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But that would require a govener or using a smaller pinion to compensate for the higher input voltage. If all you do is increase the input voltage, and change nothing else, a non-governed motor will increase in head speed which consumes more watts.
OK Riddle me this then, last I checked more headspeed also will create more pitch with a linear pitch curve normal mode. Which I assumed is what the poster is flying. He would back off the throttle lowering the headspeed to what the weaker battery was flying.

linear pitch and throttle curves greg!!

AKA left thumb governor

No Really I am the club President!!!

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01-14-2010 08:34 PM  8 years agoPost 35
Gregor99

rrElite Veteran

Western Wa

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linear pitch and throttle curves greg!!
Ah ha! Good one. Yes, the left thumb govener would reduce the throttle so the net wattage at the motor is probably only slightly higher than with the older pack. Didn't think of that.

But the linear throttle curve is probably another source of heat in the stock ESC. Since he has a linear curve, hovering is probably happening beteen 65% adn 70% throttle. Inexpensive ESCs run cooler above 85%.

Revolectrix Beta Team

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01-14-2010 10:35 PM  8 years agoPost 36
brettman

rrApprentice

SOUTH DAYTONA FL.. u.s.a.

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I'm guilty of playing with the pitch curve with the bigger pack on ,about or just below 1/4 turn it seems. Ive broken two belts,the second broke only after 5 flights and i do use silicone after every third flight.I put it together with stock plastic pulley I'm tempted to try this one with the metal 9t one to see if any change whats you guys thoughts on this pain in the ass problem

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01-14-2010 11:39 PM  8 years agoPost 37
Gregor99

rrElite Veteran

Western Wa

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I've broken a few belts on the King. It happened one time, because the belt was too tight. Another time,it was old. Yet another time because it was the Xtreme belt.

The sound of a belt about to shred is one of those common HBK2 sounds that I'm always listening for. It starts out as a bit of thwap thwap, thwap. Not loud, but different than normal.

I've kept flying past this sound before and the next thing I know the belt ejects out the back. Good thing I know my toolman piros as that's what came next. By now I'm getting used the HBK2's tail failing so I know the drill. Just hit throttle hold and try keep it flat on the way down. Flair at the end. So far I've been lucky, only damage has been the belt.

Revolectrix Beta Team

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01-14-2010 11:50 PM  8 years agoPost 38
brettman

rrApprentice

SOUTH DAYTONA FL.. u.s.a.

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yea i thought i heard a different sound also.after i change out the tail pulley,if that don't work ill do the front,i put silicone in the tube also maybe i'll run some steel wool down there for sharp edge .i guess i'll get it sooner or later please let it be sooner,it's a pia to keep changing belts besides getting expensive.

what you mean one time because it was a extreme belt,i thought they were better belts??

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