ORIGINAL: ravill
Xjet,
Have you read the posts regarding the 2 deaths in europe? I've had PCM radios since they came out and I have never (knock on wood!
) had a lock out. And I am ok if this continues to be the case! I've only heard accounts of people having lock outs....
I am not trying to start a "whats the best way to set your failsafe" debate, I just want to get folks opinion regarding how much a model flying "fast" will slow down with this full deflection setting. I know many people are strongly opinionated and that is OK, I just want folks input on my question!
Mark,
Thanks. No guess to what speed? Think about how fast your jet is traveling when you land. (I think it is safe to assume most jets land in the 25-40mph range?) Do you think a jet would slow down to a landing speed?
Thanks again,
Raf
How much the airplane slows down would be dependent upon the size, total amount of surface deflection, and aerodynamic characteristics of the aircraft. Each one would be different.
Take note: I believe the snap-roll fail-safe setting is the best choice scenario in the case of a fly-a-way full lockup R/F link failure, per how the majority of our model aircraft are equipped today!
Thinking about the tragedy that occurred most recently. Understand a snap-roll fail-safe setting... precludes the availability (some day) of some sort of on board parachute deployment safety system.... similar to some that are available for full scale aircraft today! I believe the parachute auto deployment system would be the best of all worlds. It could react within one second of R/F link failure and conceivably be the best and safest system!
There is nothing new about REQUIRING a fail-safe setup, as it was required for many, many years by the AMA for all Experimental Class aircraft. The snap-roll idea is not how slow the aircraft will be going when it hits the ground... but rather that it WILL NOT wander off out of the (safe flight area) and hit someone! The aircraft is going to hit the ground ASAP! Minimum wander time, if you will.
Yes, there are several other R/F link failure scenario's, examples might be short one or two second failures, intermittent and shorter... ect., ect. The one scenario that is all of our nightmare, and is the one we should program for is the total loss fly-a-way! You must understand that is the scenario that can most likely put people in harms-way! To heck with all of the MY MODEL comes first folks.
The snap-roll fail-safe setting has little to do with how well the aircraft survives the crash... rather that the model aircraft crashes quickly.... out in the safe flight zone!
Lee H. DeMary
AMA 36099