Hello gents...long story short:
we had a wing failure and lost one wing in flight on a new 5times flown
VOTEC 50CC from
www.2krc.com and www.lindinger.at
too bad no one took any video ..funny to watch but not to the owner see his 3000$ going down on the deck big time surviving only 4 servos
the failure took place while a big loop when the wing broke away from the wing tube
so since
thank God no one got hurt we checked the wings and here we go:
in photo 1: we see the balsa wood that connects the tube with the wing skin . wood grains are
sideways
in photo 2 : we see the thickness of the balsa estimate
2mm
in photo 3: we opened up the wing that didnt fail and we see the connection webs between the ribs after the tube.
balsa 2mm again with
grain sideways and all been broken in the spot on the photo (probably also from engines vibrations)
now the 3000$ question:
IS MANUFACTURES FAULT THE WING FAILURE BECAUSE OF THE WRONG GRAIN DIRECTION??
the manufacturer came back with an email saying there is nothing wrong with there design
my experience say: that web wood grains should be
VERTICAL cause they provide way better structural strength
here is a kit manual...not even 50cc ! please notice photo
DD19
http://manuals.hobbico.com/gpm/gpma0175-manual.pdf
Thank you all for your time voting and for also leaving a comment in this threat
We work hard for our money and manufactures of giant planes should not do this mistakes risking our money
Best regards
George