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HomeAircraftHelicopterMain Discussion › Can somebody explain why.....
02-23-2013 06:42 PM  5 years agoPost 1
JDBfor3

rrApprentice

Grand Rapids, MI, United States

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Can somebody explain why the Goblins main aluminum block and the main shaft is angled forward 2.5 degrees? Doesn't perfectly vertical make more sense? I know there has to be some reason?

Name........Jason

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02-23-2013 07:25 PM  5 years agoPost 2
icanfly

rrElite Veteran

ontario

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Because it looks rad.

I've been doing the same thing by either propping the rear skid stay with a spacer, 1/8, on my se and have modded my v2 frame by cutting out material along the bottom edge.

If anything it might send the bird gently away from you upon startup should an errant wind or breeze catch it, and you, off guard while lifting off. I have noticed that lift offs are into the wind mostly and it is annoying when the bird starts to wander your way before you get heli above you.

Compass has the rake too, and IT LOOKS RAD.

A third thing to keep in mind is that your not always landing on level ground so it is better to have the tail up in the air than putting stress on it by chancing it gets into grass or dirt and the rotor flings things into the main and chassis, or you take out parts.

And, did I mention, IT LOOKS RAD

And, one more, it will allow a lower profile chassis because the tail rotor can remain static while the chassis is lowered.

Hope that 'splains a few.

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02-23-2013 07:37 PM  5 years agoPost 3
Wave

rrKey Veteran

Illinois

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Probably helps with avoiding boom strikes.

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02-23-2013 07:42 PM  5 years agoPost 4
fenderstrat

rrProfessor

Aston,Pa

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it just looks rad

Compass helis Support Team
PerformancePlusRC field rep
Mini Titan/SE
TEAM KBDD

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02-23-2013 07:56 PM  5 years agoPost 5
OICU812

rrMaster

Edson, Alberta, Canada

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Shaft is 90 to boom same as any other Heli that has zero to do with boom strikes or anything. Have an elevated rake or angled forward head is common only reason you notice it more on goblin is cause the fuselage boom etc, etc...

...Once upon a time there were Nitros, flybars and frequency pins...

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02-23-2013 08:05 PM  5 years agoPost 6
JDBfor3

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Grand Rapids, MI, United States

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So since The main rotor shaft is not perfectly straight vertically then it's normal to have to compensate for that when you are getting angles on the blades. With the blades being perpendicular to the helicopter and straight with the tailboom the angles will be different If you are trying to achieve zero both ways right?

Name........Jason

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02-23-2013 08:28 PM  5 years agoPost 7
OICU812

rrMaster

Edson, Alberta, Canada

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When its in the air it doesent care...lol

All that matters is that its 90 to boom

...Once upon a time there were Nitros, flybars and frequency pins...

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02-23-2013 08:33 PM  5 years agoPost 8
ren

rrVeteran

Houston, TX

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Mmmm coz it looks rad....

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02-23-2013 10:33 PM  5 years agoPost 9
Dr.Don

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Cedar Park, TX -- USA

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Just be sure that if you use a level (electronic or otherwise) to set blade pitch you need to put shims under the front skids until the main shaft is true vertical or your pitch readings will be way off.

Dr.Don

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02-23-2013 10:42 PM  5 years agoPost 10
OICU812

rrMaster

Edson, Alberta, Canada

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Top of motor is same as boom 90 to shaft. Set pitch gauge on top of motor and see zero, done. Also the grips of course have zero marks on then allready to so you can set there and set gauge to zero and then evaluate...simple.

...Once upon a time there were Nitros, flybars and frequency pins...

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02-23-2013 10:46 PM  5 years agoPost 11
Dr.Don

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Cedar Park, TX -- USA

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Agree it is easy to do. However, some would overlook the need for it............

Dr.Don

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02-23-2013 11:23 PM  5 years agoPost 12
icanfly

rrElite Veteran

ontario

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If you are totally confused, let me set things straight right here and now , the tail drive mechanism and main shaft are ALWAYS 90 degrees no matter what "TILT" the heli has at rest.

I have for the last time esplained why, wherefore, who, and how art thou, what the ! is going on (hehe, don't mean to be hard).

You got a Goblirn?

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02-23-2013 11:42 PM  5 years agoPost 13
nobato1

rrApprentice

USA

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it does not matter

bet anything the gyro mount is perfect 90 to the shaft, that matters

and WHY all the goblin talk on the main forum and not in the goblin section

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02-23-2013 11:49 PM  5 years agoPost 14
JDBfor3

rrApprentice

Grand Rapids, MI, United States

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Because I wanted it that way and other manufacturers do the same thing so other owners of multiple brands of Heli's can comment on their opinion. See. Your comment is not just directed at goblins. If you don't want Goblin talk then when you see the word "Goblin" kindly keep scrolling down the page. Thanks.

Name........Jason

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02-24-2013 12:05 AM  5 years agoPost 15
BobOD

rrElite Veteran

New York- USA

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Has nothing to do with boom strike as the boom is still parallel to the rotor disk.
The reason likely goes like this.
Since the belt sprocket is at the bottom of the geartrain, there is more frame above the boom. Then, more importantly, there is more canopy above the boom. Now when you go to design the lower half and the skids, in order to get the tail off the ground, it gets very tall and awkward looking. So, the compromise is to lower the bottom half and angle the skids to clear the tail.

Team POP Secret

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02-24-2013 06:48 AM  5 years agoPost 16
ICUR1-2

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Ottawa, Ontario

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they tilted the nose downward

Has anyone else seen the Goblin Gasser ?

spending time, paying attention

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