RE: Bob Cat Copy Falcon 120 Jet
Hi tumbler, sorry about the loss of your model, do you think that the cause of the crash was the ally wing tubes failing, or failure of the wing structure itself.? Did the bending up of both sides of the tubes, occur in flight or as a result of the plane hitting the ground, as the remaining wing appears mostly in tact. Have you any video of the incident? There are a lot of planes flying out there and all this info helps in providing a safer plane for us all. I have a carbon main spar and ally front spar, purly to reduce weight, as I am heavier than a comercial bought engine installation. My wings only have 1 bolt retaining fixure in the root of the wing, I think you have 2. I have read somewhere that the later versions have a few differences, like 2 bolts in the wings, is the the rest of wing the same as the old version.
My beast has had 59 flights, all but 3 take offs have been on rough grass and the structure has performed well. (Note my previous post ref cracking around the engine mount area)
Anyone who has posted video on youtube, can you include some info on any strengthening measures you took, or any change to the spars you may have made and if the models are still airworthy. Some of the videos show the plane in high G manouvers. I would agree that any quality stamp you may find on the structure of the kit may not represent inspection levels that you or I would consider to be adaquete. I have made no strengthening measures on my wings.
I have read an alert somewhere, reference another model, having problems with the wood sheeting that makes up the main spar, having its grain running in the wrong direction which could cause structural failure in flight, (not this model, but you never know). It might be worth a look at yours so see if there are any anomolies in this area.
I would say that I, like many others, are really pleased with the model and I have not experieneced this type of failing of the structure, despite a few heavy and occasionally really heavy landings, bearing in mind i have carbon main spar.
Glad your main expensive items survived, hope you get airbourne again and would like to say that it was such a shame to see a really well finished model let you down, all best Tim