ravill

My Feedback: (11)

Flashing lights on the receiver and satellites means a low voltage condition and the system had to rebind.

And only one satellite? In a Jet? Really?

Try to hook up your turbine and see what the last off condition was. Failsafe? Low Batt? RC off? Low RPM?

rrragmanliam

My Feedback: (1)

By downward do you mean downwind? How was you airspeed? Sounds like a tip stall to me not an equipment problem. Most tip stalls happen exactly that way. One wing stops flying(stalls), plane nosesover into a dive in the direction of the stalled wing.

Rrragman

jonty

It wasn't a tip stall as it was fair honking downwind

rrragmanliam

My Feedback: (1)

How do you know? Everything you have noted points to just that. Flying flat, level and fine' then a "mystery" R aileron input, elevater trim out of wack, flying the downwind leg. What's the wing loading on this plane? How much of a tail wind? A wing can stall at what seems to be (observing from the ground) a very fast airspeed on the down wind leg. My guess is that had the plane been high enough to recover you would of found you had no equipment problem and the right wing just stalled. You obviously disagree with me and that's fine but you may want to store my theory in your memory bank for future use.

Rrragman

Airforce7

My Feedback: (31)

jonty,

What brand servo and model number were on the ailerons? How much time on the airframe?

Doug Cronkhite

My Feedback: (34)

That's assuming this was in fact a radio issue and not a control surface or assembly issue.

jonty

I'll check the servo details tonight. Rrragman, i'm not trying to be argumentative or dismissive at all what I am saying it was not a tip stall because I was flying downwind with a very light 5mph breeze at about 90mph. With a big floaty boomerang if that was a tip stall then I may as well give up flying

roger.alli

Hi Jonty

Sound like this may have been your first jet?? It’s tough to lose one without any clue to what happened.. In the end it may be very hard or impossible to diagnose the actual cause of your crash .

A crash such as you describe can only be attributed to one of three causes.

A failure in the radio control system.
A mechanical or structural failure in the aircraft.
A pilot error.

You should be able to quickly rule out the third cause, especially if you have eyewitnesses and can confirm it did not stall, or you flew it into the ground!!.. .

Radio issues can some times be diagnosed, however with the DSM system you have, you are limited in the information available, i.e. no data logging or down link. Statistically, the most common radio fault would likely be low voltage, and this is a good place to start looking.. There are lots of threads here you can search for info,, This one http://www.rcuniverse.com/forum/m_10..._1/key_/tm.htm has some great info from very experienced modellers on voltage issues in Spectrum Systems.. Jack Diaz lost a model in very similar circumstance to you. This thread is certainly worth a read.

Once you rule low voltage out, then you need to go through each component of the radio link from Tx to Servo..

A mechanical failure also might be able to be diagnosed, if you have enough of the model left to do some forensics. I think a lot of perceived radio issues may actually be airframe failures. From what you have described, I would have to agree with post 18 by essyou35. Your model was inexplicably out of trim, so something was amiss from the moment you took off. An incorrectly assembled model would explain this.

Good luck.

madmodelman

You are very correct on that one, it is possible on a Boomerang to incorrectly assemble the tailplane, I accidently did this quite recently resulting in the stab not seating correctly on the fin on one side causing an untrimmable dive and nasty roll developing at speed.

Couch Potato

I know what you mean Gary.

I got in the habit of standing 10 yds in front of the Boomer and looking to see everything was rigged properly.
You can miss this if standing next to and above the jet !