MitchD
Senior Heliman
Location: Antioch TN USA
| Z230 Frame breaksI had a z230,never had frame breaks, there were upgrades being sold to stiffen the lower frame on the ergos,but the z230 had them already.Where did it break?up by the upper bearing block?I believe either KnS or JR had supports for that,aka frame supports,for the ergo.(maybe, its been a while).overtightened bolts dont help either.....
Also what kind of head speed were you running?and was the engine ever balanced?Zenoah G23PUH engines were never perfect as far as being balanced ,but a good resonance could crack the aluminum from a continual resonance,.(flywheel off,crank off etc)the vibrating aluminum kinda gets harder till it cant take the stress anymore and cracks,(fatigue)usually around the bolts thru the bearing blocks or near the mainshaft,sometimes in almost a U shaped pattern,used to happen on a few other helis..
On the XL Gassers I flew I used to get CF delamination near the upper bearing block,after a crash,and just CA'd em, clamped em tight,let em sit overnite and never had another problem,till I crashed it again
Just some things to think about that may get you in the right direction,hope this helps you out! |
