goblin cyclic servo ball link lengths !

[Graysheli]

Hi guys i am building Goblin 700 heli my three ball link rods set to 47.3 mm the manaual states approx 47.5 all cyclic servos Futaba bsl451 will not go to 90 deg but fairly close had to set elevator ball link to 49.7 in order to set my swash plate using lynx swash plate leveler my question is do all ball link rods have to be set to the same length ? all my dx8 trims are zero thanks Gray

[GIXERMAN]

I would have links all same size, and if you can't 90 the horns, sub trim via the flybarless unit and leave radio 0

[BigBadDom]

Re: goblin cyclic servo ball link lengths !

I would have links all same size, and if you can't 90 the horns, sub trim via the flybarless unit and leave radio 0

+1 on this. When building my Goblin 630 I found the lengths advised in the manual did not result in 0° at centre stick so I had to alter all link lengths accordingly. You should as Gixerman says aim to keep all links at the same length though whilst setting this up, using (as little) sub trim in the transmitter as possible to achieve the perfect mechanical set up.

[Graysheli]

+1 on this. When building my Goblin 630 I found the lengths advised in the manual did not result in 0° at centre stick so I had to alter all link lengths accordingly. You should as Gixerman says aim to keep all links at the same length though whilst setting this up, using (as little) sub trim in the transmitter as possible to achieve the perfect mechanical set up.

Thanks for tht lads BigBadDom on your Goblin 630 do you run power to your rx from main supply through bec or a single flight pack to rx and servos ? Thanks Gray

[GIXERMAN]

By the looks of his signature threw bec. From main batteries

[BigBadDom]

Re: goblin cyclic servo ball link lengths !

Hi, I prefer independent power on bigger heli's but tend to use external becs over 2s lipos. This suits me as I don't use hv servos and it is one thing less for me to remember to charge!

If you chose to do the same be aware that most becs run off up to 6s/25v so on a 12s set up you need to wire into the parallel lead correctly or you'll feed the bec with 44.4v and it won't like that! Castle do a wiring diagram on their website that shows this correctly.

Cheers
Dom

[Graysheli]

Thanks for that Dom just one more thing to ask is the aux 1 on the ar7200 bx for pitch servo ! Thanks Gray

[BigBadDom]

Thanks for that Dom just one more thing to ask is the aux 1 on the ar7200 bx for pitch servo ! Thanks Gray

Hi Gray, yes the pitch servo goes to Aux 1 as you thought. It's detailed on P6 of the instruction manual. If you don't have a manual I would strongly suggest you download a copy as it's well written and straight forward to follow. If you need any help though, feel free to get in touch.

Cheers
Dom

[Graysheli]

Hi Gray, yes the pitch servo goes to Aux 1 as you thought. It's detailed on P6 of the instruction manual. If you don't have a manual I would strongly suggest you download a copy as it's well written and straight forward to follow. If you need any help though, feel free to get in touch.

Cheers
Dom

Hi Dom All sorted thanks got all done today what an awsome machine i love it thanks again Gray

[BigBadDom]

Re: goblin cyclic servo ball link lengths !

Awesome! They are rather special aren't they?!