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12-28-2008 08:15 AM  8 years agoPost 1
jmc67

rrApprentice

Dutchess County, NY

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I just got the JGF 400DH 4400KV Brushless Outrunner motor to replace the esky 3800kv on the king2. This motor has a sound to something like a low tone high sound (small gas engine??) compared to the esky 3800kv somewhat quieter medium to high pitch sound. Is this the way this 400dh motor should sound? There is no high pitch sound coming from the main gear so that is ok. Those that are running this motor, can you let me know?

Thanks

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12-28-2008 01:42 PM  8 years agoPost 2
Melnic

rrElite Veteran

Columbia, MD,USA

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I don't know the answer but did you use the same pinion or a smaller one?

Did you set your gear mesh correctly?

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12-28-2008 02:52 PM  8 years agoPost 3
jmc67

rrApprentice

Dutchess County, NY

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Same pinion (9t) and mesh is perfect.

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12-28-2008 05:01 PM  8 years agoPost 4
jmc67

rrApprentice

Dutchess County, NY

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I think I found what the problem is but am not sure until further tests. Looks like its the xtreme belt pulley. The tail seem to be spinning too fast for this motor causing the low high sound. All adjustments have been made to the tail - no vibrations, using the trex bat tail. Anyone here running this mod with the motor in question?

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12-28-2008 06:07 PM  8 years agoPost 5
tryan02

rrProfessor

Canton, Missouri

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Not really but I am running bigger motor with batwings but haven't got more than a few test hovers on it. They have a different sound than the king blades thats for sure. I believe its due to the flimsiness of the king tailblades.

Bigger motor gonna give you more headspeed and tailspeed by ratio. Plastic or CNC tailbox? May be about all the plastic could handle also kind of sounds like a bearing failure. Bearings growl when they get worn oil the crap out of it and see if it goes away. But if its the bearing growling will return when the oil thins.

No Really I am the club President!!!

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12-28-2008 06:12 PM  8 years agoPost 6
tryan02

rrProfessor

Canton, Missouri

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wait a minute here what are you flyin? the airwolf fuse?

It will make different sounds.

No Really I am the club President!!!

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12-28-2008 06:29 PM  8 years agoPost 7
jmc67

rrApprentice

Dutchess County, NY

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I removed the fuse in order to change the motor. So right now the fuse is not installed. I'm testing the heli without the fuse installed.

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12-28-2008 06:47 PM  8 years agoPost 8
zaw

rrKey Veteran

Lebanon, NH - USA

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I have the same motor 400DH, it is louder sound then Esky3800 and more powerful then esky.

I use curve setting of 0-70-90-100-100 seem to work best. Just have to get use to spinning it up! I had it set to 0-25-50-75-100 and motor and ESC get too warm and there seem be huge diff in rpm between 50 and 100% that tail won't hold and cause tail to kick too much on punch outs etc.

ಠ_ಠ HBK2 built with inexpensive parts! ٩๏̯͡๏)۶ Gaui425

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12-28-2008 07:02 PM  8 years agoPost 9
jmc67

rrApprentice

Dutchess County, NY

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Is that curve for throttle? It is definitely more powerfull. I had to lower my throttle curve. However, the motor gets hotter than the esky and battery. This did not happen with my previous setup. My pitch range is -9/+9 and the current throttle curve for testing this motor is 0-60-75-75-80,

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12-28-2008 08:50 PM  8 years agoPost 10
zaw

rrKey Veteran

Lebanon, NH - USA

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It like to be feed with 25C+ battery with 40W ESC

ಠ_ಠ HBK2 built with inexpensive parts! ٩๏̯͡๏)۶ Gaui425

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