heli bobs up and down on oxy 3

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leatherface
Posts: 72
Joined: Wed 08. Oct 2014 11:21:06
Location: sydney,australia

hi,when i fly fff and fast hurricanes etc on my oxy 3 i get a small bob up and down.it doesnt stay perfectly level.is there a setting that can help this situation?thanx
ZeXx86
Site Admin
Posts: 12832
Joined: Mon 29. Apr 2013 16:06:44
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Hi,

can you check if little bit lower cyclic gain cat help? I think that stock Oxy blades are not perfect for FBLs but I believe you can tune it.
Also make sure that your blades are not too tight in the blade holders.
Spirit System developer
leatherface
Posts: 72
Joined: Wed 08. Oct 2014 11:21:06
Location: sydney,australia

thanks for the reply.will try those things and let u know how i go.
Scott H
Posts: 119
Joined: Wed 24. Jun 2015 4:03:28

I just solved a similar problem on my 700 where the tail bobbed up and down at higher speeds. The resolution was to balance the blades. When I both statically balanced them (same balance point on each blade) and dynamically balanced them (on a seesaw balancer so neither was heavier than the other) my bobbing was fixed.

May not be the same bobbing, but I thought I'd share.
leatherface
Posts: 72
Joined: Wed 08. Oct 2014 11:21:06
Location: sydney,australia

had a quick fly this afternoon but was nearly dark.had cyclic gain set on 3 banks at 55%,52%and 48%. 48% seemed the worst.might try taking the cyclic gain the other way by increasing in gradual steps.i loosened the blades but had no effect.blades have also been balanced etc and seem good.im using lynx plastic 245mm.might post question on oxy thread on helifreak and see if anyone has had similar issues.might not even be the fbl causing this.thanx.
ZeXx86
Site Admin
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Joined: Mon 29. Apr 2013 16:06:44
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I heard about similar issue because of the plastic blades. They are unfortunately not good for the flying. Do you think you can try CF blades?
Spirit System developer
leatherface
Posts: 72
Joined: Wed 08. Oct 2014 11:21:06
Location: sydney,australia

finally replaced the plastic blades with carbon fibre ones and heli is much better.thanx tomas,hopefully this can help someone else.while im on here just gotta say what a great job you,ve done with the spirit.its helped me progress a lot quicker and save a lot of money because of rescue(which has worked flawlessly by the way}good job.
ZeXx86
Site Admin
Posts: 12832
Joined: Mon 29. Apr 2013 16:06:44
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Perfect!

We are very glad to help you. Enjoy your flight!
Spirit System developer
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