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Micro-iceberg dual-drive setup

Old 04-08-2008, 02:31 PM
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Stokes
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Default Micro-iceberg dual-drive setup

I recently bought a MHZ micro-iceberg on ebay, with all the hardware less motors and escs included. Amongst the things included were a servo-y lead extension (which i assume is for both ESCs) to go into the receiver. Also with the stuff was a simprop v-mixer. I've seen similar stuff advertised elsewhere "for use with dual-drive boats", but not sure whether adding this mixer will help or not. Finally my ESCs and motors for the Micro-Iceberg are here and so far hooked them up using the y-leads (not tried it in the water)....What will the channel mixer do? how do i hook it up? basically it's got 2 female sockets and 2 male plugs (jr brown, red and yellow type)...any ideas? anyone?
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Old 04-08-2008, 07:53 PM
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Default RE: Micro-iceberg dual-drive setup

the V mixer will be weird. i believe it is meant for V tail planes.
any way when you drive straight both power the both motor. as soon as you turn it will drop speed int he one motor as well as turn your rudder
i think that is how it should work
Old 04-09-2008, 01:36 AM
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Default RE: Micro-iceberg dual-drive setup

Gee thanks. On the packaging it says it's a servo mixer, but i assumed this wouldn't apply here since i only have one servo. Now the wiring's gonna be a matter of trial and error, but we'll see...In any case, props still aren't here, and the ones i've gott are these plastic jokes by robbe, don't even feel like getting the boat wet cos i'm 95% sure they won't perform as proper props should...(k series graupner for the trial fit, then perhaps something more substantial....
Old 04-09-2008, 06:27 AM
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Default RE: Micro-iceberg dual-drive setup

I'm curious why you'd go duel drives in such a small boat. It's so fast set up with one motor. Just curious.
Old 04-09-2008, 06:58 AM
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Default RE: Micro-iceberg dual-drive setup

Imho servo is too weak, except boat stays quite slow..
Old 04-09-2008, 07:22 AM
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Default RE: Micro-iceberg dual-drive setup

SV27...your curiosity will be satisfied....it was more a matter of not wanting to undo what others did to the boat before i bought it. Apparently the seller had read this article on this German boating magazine, where the iceberg was set-up with 2 outrunners, so i decided to play along with the madness....should be running 2x2s lipos (one for each motor/ESC)...just bought the props. Will run 2x 33mm graupner ks (on the magazine - which the seller kindly included in the sale, the boat is said to reach 50+ km/h with 33mm props, and even with 36mm, the article said it should go even faster without the motors getting warm - though this still needs to be verified by yours truly).

Fiend - what was that you're saying about the servo? didn't quite get what you meant....
Old 04-09-2008, 07:26 AM
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Default RE: Micro-iceberg dual-drive setup

two is better then one.
and the servo is not to weak. it has the strength but does it have the quality.
Old 04-09-2008, 07:52 AM
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Default RE: Micro-iceberg dual-drive setup

yep taylor, quality (reliability usually rather than performance) can be a bit of an issue (or a massive one, when half your boats have burnt out fibre hulls on the inside) [&o]with these chinese bits - but we'll just have to wait and see....
Old 04-09-2008, 02:43 PM
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Default RE: Micro-iceberg dual-drive setup

OK I understand and wouldn't convert it back without trying it the way it is. I think twins sound awesome anyway. I guess If I was building a boat and cost mattered I'd gravitate to one motor. But you have two!. Let her rip.
Old 04-09-2008, 03:14 PM
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Default RE: Micro-iceberg dual-drive setup

Can't wait til the weekend....and need to convince "her" to join me down the lake to take a vid....first i will try the y leads feeding both ESCs equally, and if that works fine i'll leave as is. (who was it who used to sign his posts "if it ain't broke don't fix it!"?)

If not i'll hook up the mixer. If i understand the instructions correctly both ESCS feed into it, then one of its leads feeds into the receiver and the other one hooks onto the servo. It's a weird build for me, as i'm hardly following anything i learnt on my other projects - never run outrunners, never run twin drives, certainly not without cooling....and never had so many shiny new parts in one boat

In any case the micro-niceberg (is what i'm calling it until the first time she hits the water and things start going wrong) now weighs 760 grams with the lipos.

Hardware and electrics details are as follows:

2 x 2mm gundert wire drives with m4 stubs running in 4mm tubes and 2mm bushings at the ends
2 x 2mm turned alu motor mounts and motor aligners (with lube pipes) from gundert
1 x 110mm CNC alu rudder (from gundert)
2 x 33mm counter-rotating props (graupner k series are all i found at the lhs) - will try the robbe plastic 35mm with less pitch - but not really trusting them
2 x mystery 30A brushless escs
2 x mystery 3000kv outrunners (about 50 grams each)
2 x solid alu couplers
1 x hxt micro-servo
2 x 2s 1300mAh 20c lipos (loong max)

actually SV27 dayton....cost did matter (so i cut corners by buying the mystery combos - 60USD for everything)


Old 04-15-2008, 01:58 PM
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Default RE: Micro-iceberg dual-drive setup

she WORKS!!!!! best handling boat i''ve got, though perhaps not the fastest (yet). Great in a straight line and pretty stable in turns - flat as a pancake as she should be. Water was flat so no problems turning and giving it gas. Acceleration''s pretty good too, even with a twig on the rudder (found that later). the only "but" is that the outrunners make a bit of a strange noise - the usual whistle of these kind of motors, and then a rasping sound at speed - like the plastic gearboxes on the Graupner hydrospeed setups...weird - but it works fine otherwise. Anyways - i''m happy, though in all fairness i took over someone else''s work.

Will try her with 2x 3s lipo in parallel thursday with some good vid hopefully. Oh yes - and most impressive thing about it is the super-long run-time. 15 mins flat out on 2x2s 1300mAh with 33mm props

Old 04-15-2008, 02:05 PM
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Default RE: Micro-iceberg dual-drive setup

ps- v-mixer not necessary. Ran great with y leads...
Old 04-15-2008, 04:04 PM
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Default RE: Micro-iceberg dual-drive setup


ORIGINAL: Stokes

ps- v-mixer not necessary. Ran great with y leads...
no its not. it is just kinda cool to play with
Old 04-18-2008, 09:06 AM
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Default RE: Micro-iceberg dual-drive setup

Stokes

Where is the video?

What do you think of the quality of the MHZ boats?

Just order 2 from MHZUsa: the Eco Shark and the Micro Fountain......

JC
Old 04-18-2008, 10:54 AM
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Default RE: Micro-iceberg dual-drive setup

those boats are really nice looking..mhz makes pretty nice hulls..but the iceberg is a bit thin in some places
Old 04-18-2008, 04:02 PM
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Default RE: Micro-iceberg dual-drive setup

hey i'm uploading the video as I type. In the meantime here are the pics.....

so today was a kind of successful trip to the lake, although the inside of the iceberg is now black - burnt both ESCs on 11.1v...she ran great before that...anyways it was a matter of time before that happened. Anyone know of an efficient system to get the black gunk out of the fibreglass? The first couple of runs on 2s were fine....but with 3s - handling was kind of iffy. Pity the ESCS didn't hold up....
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Old 04-18-2008, 04:29 PM
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Default RE: Micro-iceberg dual-drive setup

Thanks Joccee

I have never reallyseen an MHZ boat in real, only in pictures and internet. But so far I have read so many things about and is very impressed, especially the quality. Hope its the same quality as a BMW or a Mercedes..... or a Volvo.....


Stokes

Pictures looks great. Can't wait to see the video.

JC

Old 04-18-2008, 04:43 PM
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Default RE: Micro-iceberg dual-drive setup

Yeah Jerome, i really think they make great hulls. I used to swear by hydro and marine, but having tried the iceberg from MHZ makes me want to experiment more with this brand. I agree with Jocee that they can be quite thin in places, but compared to Hydro and marine (i have 4 HM hulls) - i can say that this is really nothing to worry about.

I'd say they're one of the best RC hull manufacturers in europe - don't know the other markets unfortunately.

oh - and youtube is super-slow today.....just managed to upload 1 vid so far, but that's of my sidewinder mono, so i'll leave that for another thread..
Old 04-18-2008, 05:03 PM
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Default RE: Micro-iceberg dual-drive setup

finally the vids:

Iceberg on 2s2p:
http://www.youtube.com/watch?v=GaSGHiNr-LA

Iceberg on 3s2p:
http://www.youtube.com/watch?v=BcCjAP0UwQ0




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