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Other News  I think I see a goblin
10-13-2011 03:34 PM  6 years agoPost 21
jphilli

rrKey Veteran

Atlanta, Ga.

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Another +1 for belts. Am I allowed to say that this helicopter makes me excited?

Oh and damn Bert, killed those batteries huh?

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10-13-2011 03:40 PM  6 years agoPost 22
rpat

rrElite Veteran

Weirton, W. Va.

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Hey guys don't you remember the Koyosho line the 30 and the cal 5 were both belt driven. The word for that is smooth. I naver had a problem with any of the belts on either one of the calibers, and they were very smooth.....they just had other problems like parts supply.

trex 700fbl cal30,minititan,, trx600fbl,trex250,logo 500,Velocity N2

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10-13-2011 03:56 PM  6 years agoPost 23
Justin Stuart (RIP)

rrMaster

Plano, Texas

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I'm a little concerned that the motor has a belt under tension and no bearing on the far side of the motor output shaft. Seems to me that this will tweak the motor bearing causing premature failure.

Don't most new helicopters these days of the 700 variety have a 3rd bearing block for the motor/pinion?

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10-13-2011 03:58 PM  6 years agoPost 24
Ronald Thomas

rrMaster

Gainesville, Fl, USA

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It has been proven that 6mm motor shafts, do not need counter bearing or 3rd bearing assemblies. So no....not unless you plan on running a 5mm shaft in your motor. I am pretty sure they don't even come that way any more...............Ron

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

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10-13-2011 04:09 PM  6 years agoPost 25
Wave

rrKey Veteran

Illinois

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Justin, A radial bearing should be able to tolerate some radial loading.

The trend to support the end of the motor shaft may be related to the vibration and shock loading that a main gear can deliver directly to the motor output shaft.

The primary drive belt on the Goblin acts to isolate the motor from the main gear.

Your correct though, it would have been nice to see support for the end of the shaft.

I think they just tried to keep it simple and light weight.

In my opinion the industry changing design aspect was taking the FAI fusalage look and incorporating it into a lightweight 3D heli design.

We may see other companies follow suit in the future.

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10-13-2011 04:21 PM  6 years agoPost 26
jgunpilot

rrKey Veteran

Pollock, LA

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In my opinion the industry changing design aspect was taking the FAI fusalage look and incorporating it into a lightweight 3D heli design.

We may see other companies follow suit in the future.
That was a brilliant way to stand out in the market. It remains to see if it's easy to work on and if people can get parts.

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10-13-2011 04:39 PM  6 years agoPost 27
bradbranch

rrNovice

bradbranch@msn.com

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Also we need to add Mikado to the belt class of heli's. LOGOS are chewing up air space with little problems.

Also look at the boom of the Goblin, there isn't one the fuse is the boom! It would be a feat to keep bearings center for a torque tube,
and you have less balancing issues with a belt.

It's a cool copter, its like I am looking at what Heim should be today with the modular components.

SAB has taken the next step.

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10-13-2011 04:58 PM  6 years agoPost 28
Havoc

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Ky.

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Looks like a Compass head with a Joker gear train.

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10-13-2011 05:43 PM  6 years agoPost 29
Justin Stuart (RIP)

rrMaster

Plano, Texas

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It would look good on my shelf.

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10-13-2011 06:00 PM  6 years agoPost 30
blackbird

rrVeteran

thessaloniki-Greece

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Those blades with green and white is only for goblin??

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10-14-2011 01:47 AM  6 years agoPost 31
OLROY

rrKey Veteran

Wichita Ks

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Watch at YouTube

For those that didn't see this one....the flight before Bert's

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10-14-2011 05:24 AM  6 years agoPost 32
cap231ex

rrApprentice

Muncie , Indiana , USA

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Saw a couple of them at the jamboree this year and they were very impressive.

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10-14-2011 07:04 AM  6 years agoPost 33
BobOD

rrElite Veteran

New York- USA

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I'm a fan of belt driven tails. More robust and the tail only averages 15% or so of the power so the impact of a lower efficiency is minimal. 10% of 15% is not much to speak of.
But to drive 100% through a belt?

Most efficient is a straight spur.
Next is helical
Then herringbone
Then belt.

I wonder why they went this route?

Team POP Secret

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10-14-2011 07:29 AM  6 years agoPost 34
Heliguychris

rrKey Veteran

Perth, West Australia

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this is the first heli that i have dreams about since my r90se i bought cause alan had one and spanked it.....
now its bert and a goblin......sik

im holding of until regular folks are getti g time on them. bert could polish a t.,d and folks can do the damndedst things to get a heli through a flight or two.

ill know its for me when i see the regular joes beating on it all weekend without a wrench in site

Licensed (CASA) UAV operator certificate holder 1-YFOF5-01 www.helicamaerial.com.au

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10-14-2011 10:12 AM  6 years agoPost 35
Richardmid1

rrProfessor

Leeds, England

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^^^thought herringbones were more efficient because they don't produce side load on bearings like helical?

Anyway, what the price of those booms on the Goblin? Looks awfully expensive to crash!

60% of the time, it works every time!

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10-14-2011 01:33 PM  6 years agoPost 36
BobOD

rrElite Veteran

New York- USA

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Stronger and quiter, but less efficient. There's more sliding (friction) in the tooth contact versus a straight spur which gives almost pure rolling.
The side loading acts on bearings which don't consume much power...as long as they are strong enough for it of course. Sometimes not the case unfortunately.

Team POP Secret

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10-14-2011 01:41 PM  6 years agoPost 37
philip 01

rrElite Veteran

ft worth

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very impressive,

and doubt anyone is interested in splitting hairs.

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10-14-2011 01:41 PM  6 years agoPost 38
Justin Stuart (RIP)

rrMaster

Plano, Texas

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Straight spur is also the most noisy. Maybe they were going for noise reduction with the belt on the motor, or maybe just convenience considering the power pod layout.

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10-14-2011 01:43 PM  6 years agoPost 39
philip 01

rrElite Veteran

ft worth

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anyone know what the cost will be on this heli?

might need one.....

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10-14-2011 02:10 PM  6 years agoPost 40
Wave

rrKey Veteran

Illinois

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Philip, They are $1000 and come with main blades and tail blades, which are ~ $150 value.

So basically an $850 kit, and it comes fully painted ( Canomod ).

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