Goblin helicopters technical support thread

[dreamer82]

Mr goblin can i know whats the difference between the 660 , 700 and 770 goblin? I know the frame is still the same only difference is the boom length, blades and belt am i right to say that? Just to confirm thanks

[dreamer82]

Also can you attach a picture of the confirm colour of the canopy that comes with the kit too as i have seen many different colours

[goblinhelicopter]

Originally Posted by Mr. Ben

What are the teeth counts...
1st stage belt: pinion and driven pulley
2nd stage gears: pinion and driven gear
Tail belt: drive pulley and driven pulley.
Thanks,
Ben

Hi,
1st stage belt = 15 to 28 / 60
2st stage gear = 19/68
3st tail belt = 36/27

Goblin helicopters

[goblinhelicopter]

Originally Posted by dreamer82

Also can you attach a picture of the confirm colour of the canopy that comes with the kit too as i have seen many different colours

for now, Goblin 630 is different in:

boom
tail belts
tail pulley
damper

for now, Goblin 770 is different in:

boom
tail belts
tail pulley
main shaft
damper

The Goblin 700 production will be very similar to the picture attached.

Goblin helicopters.

[dreamer82]

wow A1 respond thanks mr goblin

[dreamer82]

Have any of u guys considering Kontronik PYRO 700-52L to power the goblin or scorpion hk4525?

[jhheli]

What are you using to level the swashplate in the V Bar setup menue?

Justin

[scoti333]

Originally Posted by Inverse

Awesome.
How are you able to run bearings on your main grips and a solid shaft to your swash?
Doesn't the movement in the head and the fact you are using solid pushrods cause bad loadings in the grips and bearings?

I'd like to know this too..

Also, this has probably been mentioned before but what's the main shaft size?

[DT75]

http://www.goblin-helicopter.com/index.php

Just scroll down the page. It's in Italian, but measures, weight and gear ratios are pretty logical to work out.

[goblinhelicopter]

Originally Posted by jhheli

What are you using to level the swashplate in the V Bar setup menue?

Justin

Sorry, I do not understand what information you ask. Could you repeat the question?

[goblinhelicopter]

Originally Posted by Dumbthumb75

http://www.goblin-helicopter.com/index.php

Just scroll down the page. It's in Italian, but measures, weight and gear ratios are pretty logical to work out.

This page is an old page.
In a few days will be on line the new website.
The shaft is 12 mm. Steel hardened and tempered.

[jhheli]

Which one do you use?

http://www.readyheli.com/LEVELER4-Lo...g_p_34924.html

http://www.readyheli.com/LEVELER5-T-...g_p_34925.html

[goblinhelicopter]

Originally Posted by jhheli

Which one do you use?

http://www.readyheli.com/LEVELER4-Lo...g_p_34924.html

http://www.readyheli.com/LEVELER5-T-...g_p_34925.html

ok

We used a "Swashplate Leveler" done by us. No need to remove hub.
Probably will uprade in 2012.
The shaft is 12 mm.
This is ok.
http://www.readyheli.com/LEVELER5-T-...g_p_34925.html

[goblinhelicopter]

Originally Posted by csdstudio

Here's what happens during the rocking of the head (pic attached)...whether or not it's a good thing to have the ball position change back and forth, that I don't know. I'm sure the dampeners are extremely stiff on the goblin, so this drawing is a bit exaggerated to say the least.

Hi,
I took your picture.
I edited the picture to see what happens.

The movement of the spindle in the Goblin is very low.
The drawing emphasizes.... The swashplate remains oriented correctly, because the two linkage go in the opposite direction. The two linkage are not infinitely rigid and then deform.
In practice, their rigidity is added to the rigidity of the damper.

The system was developed with many tests. We worked on the damper, on their preload, on the distances. The result is very good for us.

[aris2024]

Originally Posted by goblinhelicopter

Hi,
The swashplate remains oriented correctly, because the two linkage go in the opposite direction. In fact, one goes forward, the other back. The two linkage are not infinitely rigid and then deform..

I think you mean the swashplate remains oriented correctly, because the two linkages go in the same direction. If they where going in the opposite direction we would have rotation in the swashplate instead of a slight deformation on the linkages. Your picture shows that correctly.

[goblinhelicopter]

Originally Posted by aris2024

I think you mean the swashplate remains oriented correctly, because the two linkages go in the same direction. If they where going in the opposite direction we would have rotation in the swashplate instead of a slight deformation on the linkages. Your picture shows that correctly.

Yes, I meant that in the same direction.
thanks Aris

[Inverse]

Originally Posted by goblinhelicopter

Hi,
I took your picture.
I edited the picture to see what happens.

The movement of the spindle in the Goblin is very low.
The drawing emphasizes.... The swashplate remains oriented correctly, because the two linkage go in the opposite direction. The two linkage are not infinitely rigid and then deform.
In practice, their rigidity is added to the rigidity of the damper.

The system was developed with many tests. We worked on the damper, on their preload, on the distances. The result is very good for us.

Yes, this is what I was suspecting, the original image was wrong and it wouldn't happen that way.
You saying your pushrods flex slightly?
Just interested in the mechanics behind it

[scoti333]

Just wanted to say that it is very cool that you guys (SAB) started this technical thread and are staying on top of it to boot! I have one last question. Did you guys have any problems with the servos flexing vertically since they are mounted horizontally?

[goblinhelicopter]

Originally Posted by scoti333

Just wanted to say that it is very cool that you guys (SAB) started this technical thread and are staying on top of it to boot! I have one last question. Did you guys have any problems with the servos flexing vertically since they are mounted horizontally?

Hi,

The servos are mounted with rubber but very tight.
In this way the servos very little flex.
Never any problems.

[OICU812]

Unless I missed it...

With the batches that HD is getting "WHAT" is the first run of Goblins color scheme going to be?????