RunRyder - Esky 3100 vs 3900 Brushless Motor, HB King?

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e-E-Sky Honey Bee- Lama- Belt CP- E-Smart > Esky 3100 vs 3900 Brushless Motor, HB King?

vortechZ230
Elite Veteran
Location: Michigan, U.S.A.

Im currently running a Esky 3100 with a 11 tooth pinion, Thunder power 1320 lipo, What can be expected if I change to a Esky 3900, 10 tooth pinion, Thunder power 1320 lipo?, will performance be better?,can I use a 2100 lipo?,for more power and longer flight time?, Thanks for your replies and help!....

01-27-2008 04:18 PM

HOMEPAGE

tryan02
rrProfessor
Location: Canton, Missouri

I dont own the 3900. But I read on here the 3800 has more power. I use a 300hdx3800 and 10t pinion thats a lot of headspeed makes the heli really come alive. I started with an 8t and it was very stable easy to fly I would assume that would be around the same headspeed of the 3100 and 11t. And I just got a 2100mah cellpro revolution battery its hard to fit it in the canopy but it will and I get 10min hovers with room to spare and not discharging the pack too low.

Canton MO backyard flying club
Club President
Team No funds left.

01-27-2008 04:25 PM

HOMEPAGE

thrstrmech
Veteran
Location: CA, USA

haven't you heard of the low speed problems with the 3100, mine chatters and hesitates to run up 'til half throttle, dumping mine

i suck at this, but having the time of my life with it!

01-27-2008 04:44 PM

Sgt Heli
Veteran
Location: Remlap, Al USA

Im running the 3800. Real happy with it. All the power you could want. I went straight from that oem brushed garbage to this motor so I dont know about the others. This motor required a little dremel work on the mount but getting that done was not a problem.

01-27-2008 04:52 PM

vortechZ230
Elite Veteran
Location: Michigan, U.S.A.

My 3100 is a older motor, no low speed problems at all... Dremeling the frame to get the 3800 to fit weakens the the hell out of it!, your just asking for frame failure when your flying!

01-27-2008 04:55 PM

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DougsRC
Elite Veteran
Location: MA

http://www.youtube.com/watch?v=Nuq8G1ojc6c Vortech, That wouldn't happen !

01-27-2008 05:09 PM

vortechZ230
Elite Veteran
Location: Michigan, U.S.A.

Dougsrc, OUCH!!!!

01-27-2008 05:11 PM

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ragtop
Senior Heliman
Location: salt lake city, utah, usa

i had a hdx 3800 for about a year and a half, and a bearing went out so i swapped in a 3100 i bought from jag. in contrast its about 40% less powerful and it needed a 10tooth pinion even to fly for me. the lower head speed forces me to be more aware of the tail when im out side. heres the up side for me, my 10c 1000mha bats that used to get super hot and last like five min. now get barely warm and i get like 8 min of flights. im gonna keep it in till spring and i can fly outside. i replaced my bad hdx3800 with a hdx 4500 its slightly shorter and it has a fan this time.

I wish I was good at this

01-27-2008 05:20 PM

Sgt Heli
Veteran
Location: Remlap, Al USA

Quote
Dremeling the frame to get the 3800 to fit weakens the the hell out of it!,

Oh please, have you done it? The amount removed would hardly fill a thimble for a gnat!

Anyway, if your concerned about it just add the spacer other folks are using, then no mods required.

01-27-2008 05:25 PM

vortechZ230
Elite Veteran
Location: Michigan, U.S.A.

Where do you get the spacer? can you post a link?, Thanks!!!

01-27-2008 05:28 PM

HOMEPAGE

DougsRC
Elite Veteran
Location: MA

A thimble for a gnat

Your right Sarge !! My frame break was a direct result of gluing the motor mount back on the frame after a crash, NOT from the small amount dremeled ! ( I am saluting you sarge

)

01-27-2008 05:39 PM

thrstrmech
Veteran
Location: CA, USA

morning dougsrc, was 'bout to send the troops out to look for you, MIA, for a bit, did wally show you the way home

i suck at this, but having the time of my life with it!

01-27-2008 05:43 PM

DougsRC
Elite Veteran
Location: MA

Yes, I was lost in the woods, but I followed the sweet sounds of Wallys voice calling to me, I followed said voice and found my way home, Wallys a Good Boy !

01-27-2008 05:48 PM

Sgt Heli
Veteran
Location: Remlap, Al USA

Check out this thread and read JMCs post.
http://www.runryder.com/helicopter/t400746p1/

01-27-2008 05:51 PM

Burlyman38
Veteran
Location: Troy,IL

I currently have the 3900kv motor with a 9T pinion. While i am just learning to fly, i get in the air at half throttle in normal mode and woodies. I also bought the 3800 with a 10T but do not have it up and running yet. using darkhorse the 3900/9t comes out to 2400rpm and the 3800/10T is about 2560rpm.

TripleB
Flying by the street light.

01-28-2008 03:10 AM

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e-E-Sky Honey Bee- Lama- Belt CP- E-Smart > Esky 3100 vs 3900 Brushless Motor, HB King?

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