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03-03-2008 10:57 PM  10 years agoPost 1
red_sash

rrApprentice

Canberra, Australia

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I've gone through the last posts, but still need some guidance and advice.

I've got a workmates HBK2 he stacked. Had it hovering, with the tail holding sort of OK, and then it just started losing power. I thought how can the battery be dead. Then landed, and tried to spool it up and nothing. Brushed motor siezed.

For brushless (this guy is only learning, just hovering) 3100kv or 3800kv. I know there are other brands, but just want to use the stock esky stuff which is usually pretty reliable and its cheap and quick from Hong Kong. I'm just gonna get the standard brushless ESC.

Whichever, what pinion is recommended for both. I'm interested in whether you run a higher headspeed to control the tail. I dont want to tell him to get the xtreme pulley yet, because I feel like a bad mechanic already (gives me his heli to fix and then I ring him that he needs a new motor, and might as well get a better one etc). I want to keep the cost down for him.

Any advice greatly appreciated.

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03-04-2008 12:43 AM  10 years agoPost 2
norsman

rrKey Veteran

paradise PA

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I'm useing the 3100 and it sucks,hard starts.My son bought the 3800 and it's smooth as silk.I learned of the hard starting 3100 to late so I'll put up with it for awhile but buy the 3800...

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03-04-2008 12:43 AM  10 years agoPost 3
norsman

rrKey Veteran

paradise PA

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Were both turning 11t and they fly great...

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03-04-2008 12:53 AM  10 years agoPost 4
tryan02

rrProfessor

Canton, Missouri

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I use a 3800 but of the 300HDX variety on 10t but 9t would be fine for normal flight.

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03-04-2008 05:42 AM  10 years agoPost 5
waylander

rrNovice

Edmonton, Alberta - Canada

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3800 w/ 11t, the 10t would be fine but the 11t provides more head speed and won't bog at all. I like it because I have the extra weight of a fuselage.

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03-04-2008 06:01 AM  10 years agoPost 6
TJinGuy

rrProfessor

Socorro, NM - USA

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I would recommend either of the 3800 motors (esky or HDX) but they require a little something extra to install (spacer or frame mod). The esky 3900 motor should install without a second thought. I am currently running an 8t on a 300HDX 3800 with a pretty mild th.curve and it holds great for hovering and even for FF flight. When the heli is pushed harder, it won't hold. I am sure that a 10t would solve that easily. I have one coming. As for ESCs, I don't think many of us use the esky brushless. Most use one of the 30A models. I use the Dynam and like it, and others use the ELE or an Align ESC. Seems like all of them work as advertised in our small helis.

- Chris

Team New Mexico
TJinTech

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03-04-2008 10:49 AM  10 years agoPost 7
jwhitacre

rrKey Veteran

Tarentum,PA- US

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I would say get the Esky 3900Kv with the 25amp ESC and a 9T. Oh and get a switching BEC to feed the electronics

Depleting the world of parts, one crash at a time!!

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03-04-2008 03:26 PM  10 years agoPost 8
ut_neon

rrKey Veteran

Coimbra, Portugal

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I would recommend either of the 3800 motors (esky or HDX) but they require a little something extra to install (spacer or frame mod).
here is the perfect solution:

i am using some double sided tape as spacers right now but i will really get this nice upgrade =>

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03-04-2008 04:43 PM  10 years agoPost 9
tmaxx26power

rrApprentice

South Dakota

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Double sided tape as spacers for the motor? Not being a solid mount has to let your motor move around, no way can the pinion-main gear mesh stay accurate. That's just looking for trouble!

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03-04-2008 05:14 PM  10 years agoPost 10
TJinGuy

rrProfessor

Socorro, NM - USA

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Just buy or make a spacer. The spacer I got cost $3 and it works perfectly. Seems like a good deal to me. Just consider that as part of the cost of the motor.

- Chris

Team New Mexico
TJinTech

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03-04-2008 06:08 PM  10 years agoPost 11
ut_neon

rrKey Veteran

Coimbra, Portugal

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sorry i forgot to post a picture in last post... here is the perfect solution:
i meant to put this pitcture=)

~i'm just waiting for this release from extreme =>

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03-04-2008 09:15 PM  10 years agoPost 12
red_sash

rrApprentice

Canberra, Australia

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Thanks guys
Thanks to everyone for your time and assistance. What a nice bunch.

Looks like the 3800 (I didn't see the 3900, but it might be there), and I'll get a couple of pinions to start him off.

Anyway, seems the 3100kv is not the motor of choice for most.

Thanks again all, and may the lady of the lake, her arm clad in shimmering samite, also hold aloft an esky for all of you.

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03-05-2008 04:35 AM  10 years agoPost 13
ragtop

rrVeteran

salt lake city, utah, usa

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ya the 3100 are hit or miss in the hard start prob. i bought one on clearance because of this brob and its worked flawlessly from the beginning. 11tooth pinion and the head speed is good but nothing like the 3800s. good tail authority and i get good flight times. its really good for when i was working on my hovering.the lower head speed dulled down the instability. well it did for me! id get the 3800.

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03-05-2008 04:43 AM  10 years agoPost 14
red_sash

rrApprentice

Canberra, Australia

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Yep
Ragtop,

I have made the recommendation for the 3800 to the owner. Just waiting for him to accept the cost implications. But given he hasn't got a working motor at the moment................

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