SebArt Sukhoi 29 50E
I have seen 2 of these models crash and be a total write off. Both were being flown by very experienced and very skilled pilots. Only with the second crash was the problem discovered. The first crash happened when the plane was in low knife edge and the canopy came off. There was no response from the plane and it cart wheeled across the patch, totally destroying the plane.
The second crash was similar, this time the plane was doing a knife edge loop and at about 3/4 of the way round, the canopy came off and again the plane did not respond.
The first and obvious fault was the canopy comes off way too easily. This is an aerobatic/3D aircraft which should be capable of standard knife edge and knife edge loops.
The second fault is far more serious. When the canopy comes off it turns the radio off!!!!!!
Both of these models were built as per the instructions and the instructions tell you to install the ON/OFF switch at the front just under the canopy hatch. So when the canopy hatch comes off in flight, it turns the radio off, resulting in total loss of control and in both of these instances total loss of the airframe, motor, ESC and 6S batteries.
If you have one of these and have built it as per the instructions, then I highly recommend that you modify it immediately to put a physical catch so it's impossible for the canopy hatch to come off in flight. Magnets are not good enough for a model of this size.
Cheers n beers
George