Had a misfortune, well almost as the Mustang exhibited a Spektrum LOCK OUT as it seems like I have the older AR7000 with the long re-bind timing or at least this is what the hobby store and other RC flyers who locally fly with me told me. Here is a few pictures showing the crash results and VIDEO:
Okay, my model suffered from two major problems and here is the skinny and I am afraid that I am completely at fault.
Major Problem #1:
1A. The particular Electronic Speed Control (ESC) that I selected, one Castle Creations Thunderbird 54 has a linear 3.0 AMP maximum output onboard Battery Eliminator Circuit (BEC).
1B. The Mustang has a grand total of Five (5) Servos, three of which are HS-81MG for Rudder, Elevator, Gear and two are Park Zone Long Lead Analog for Ailerons.
1C. The one HS-81MG for the Gear had never been adjusted for "END POINT TRAVEL" to make sure I am not over driving it either in the DOWN or UP position.
Major Problem #2:
2A. Those that alerted me here are correct, even though my Spektrum radio gear is brand new there is something REALLY WRONG with the fact that the Receiver can not keep BIND with the Transmitter. Both Hobby shops were kind enough to determine this irregardless of the situation with the ill fated selection of the ESC.
2B. I verified this by calling the TOLL FREE number on the Spektrum manual for Technical Support in the page that discusses Binding! They already had me in their computer system and the person on the telephone said that a shipping label was being mailed right away so, I can ship both the Spektrum Transmitter and Receiver to them and turn around is about 7 business days. I told him that I am in no hurry as I am going to install my BERG 7-Channel in my new Mustang with battle scars!
I DID NOT measure the steady AMP draw with the Full compliement of 5-Servos during static testing and I may perhaps would have seen that any margin from the 3.0 AMP output linear device onboard from the Castle Creations Thunderbird 54 AMP ESC would be on the edge or gone thereby, the first attempt to turn and activate more than 3 servos such as making a turn would have deminished the Voltage levels for the Spektrum AR7000 and produce an UGLY situation that lost of BIND would occur.
The fact that I found the model with the LED LIGHT "ON" Post Crash just tells us that right before impact the Receiver came back to bind with the Transmitter and my Continuous UP Elevator commanding really worked and reason for my model not completely destroyed!!!!! The Video shows the model coming down vertically but, recall that the model went below ground level as it landed in a water run-off area of the field and there is a very big chance that the model regained BIND and started to Level off before impact. Post Crash pictures show this!
So, the Receiver did it's job but, the ESC was overloaded with 5-Servos being activated for flight and this left a very low margin (3.5 Volts) or below for the the Receiver and possible reason for the crash.
The Bind issue is another problem but, this did not have an range issue.
I have purchased one E-Flite 40-AMP Lite Pro Brushless ESC with Switch-Mode BEC and Advanced Programming. This device allows for up to 7 analog or 6 digital standard sized servos with the BEC on any "recommended" input Voltage, up to 6-Cell Li-POLYs!!! The cost $69.99 plus tax.
I will ship the Spektrum Radio gear to Horizon Hobby using the pre-printed mailing label and instructions as soon as it arrives and I will install the Castle Creations BERG 7-Channel Super narrow band 72Mhz FM receiver instead.
Please note that this power system is capable of flying this model!!!
A Special Thanks to Gerry (Simano) for taking this Video Footage!!!