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Goblin 700 › head schake
12-02-2016 05:36 AM  6 months agoPost 1
plakkertje

Senior Heliman

belgium

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Hi all,
what head speeds are u using on jour goblins 700comp without chaking?
for smood flying.

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12-04-2016 08:14 PM  6 months agoPost 2
plakkertje

Senior Heliman

belgium

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No one have an goblin 700 comp...
is there any one who have the hps 2 head on it?

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12-04-2016 09:51 PM  6 months agoPost 3
crespo1

Heliman

parksville new york

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I run 1800 1900 and 2000 in mine

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12-05-2016 04:56 AM  6 months agoPost 4
plakkertje

Senior Heliman

belgium

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Hi Crespo 1,
did you try to go lower on the headspeed?

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12-05-2016 11:36 PM  6 months agoPost 5
crespo1

Heliman

parksville new york

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not on my 700 but on my 770 I run low head speed 1300 1400 1500

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12-06-2016 05:13 AM  6 months agoPost 6
plakkertje

Senior Heliman

belgium

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Why i ask,
i have 2goblins 700kse.
one i converted into 2 blade head with the hps 2 but have terrible schakings at lower head speeds (1600-1800) i disassembled and rebuild it 3 thimes, tryes al the different head dempeners, gains,...
but the schaking is still there.
befoure i buyed it i had one regular head from an 700 comp that i have tryed from an frind of myne and it was perfect.

than i wondering if it is an hps 2 head problem because i see that it do not come on the new uruquai anymore (it is an singel schaft setup and not an 2 independent now)

that is why is ask if there are people with the same prob on the hps 2 head...

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12-07-2016 12:16 AM  6 months agoPost 7
crespo1

Heliman

parksville new york

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I don't know kse at1600 1700 and1800 no problem and I have 630 and I run that one at 2000 2200 and 2400 no shakes on any you shur got it together right

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12-07-2016 12:22 AM  6 months agoPost 8
crespo1

Heliman

parksville new york

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all two blade comp head is one spindle shaft and check to see if its bent

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12-07-2016 07:45 AM  6 months agoPost 9
plakkertje

Senior Heliman

belgium

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Its brand new, i desassables and assembled 3 thimes
Al the headspeeds above 1800 are ok but not ok lower.
With the comp head there was no problem at this head speeds...
i think it is the design of the hps 2 bead...
i realy want to know if there are pilots here that flying that hps2 head
and what there opinions are about it.

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12-09-2016 11:01 PM  6 months agoPost 10
plakkertje

Senior Heliman

belgium

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Nobuddy on the hps 2?

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12-10-2016 03:20 PM  6 months agoPost 11
Anton123

Senior Heliman

Canada

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Have you contacted SAB? Maybe there is a design flaw in the one you have received. Maybe contact them for some answers or a replacement. Keep us posted.

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12-10-2016 03:30 PM  6 months agoPost 12
plakkertje

Senior Heliman

belgium

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Yes, i did.
They will send mee some new parts.

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12-10-2016 03:32 PM  6 months agoPost 13
Anton123

Senior Heliman

Canada

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Nice!

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12-30-2016 01:15 PM  5 months agoPost 14
plakkertje

Senior Heliman

belgium

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Problem solved.
It was the 3blade tail that coused the schakings
It is not possible to track the tail blades on that system and that make vibrations.
above 2000rpm on the main rotor where fine, but when douing autos there was an therrible schaking at an point
I put an 2blade tail assebly and the schakings are gone.
The strange thing is that with the 3bladed rotorhead there is no probl at al, it must absorbe a lot of vibrations.

Thanks to sab itally for the wunderfull service!!

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Goblin 700 › head schake
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