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S.Dubai · 10-29-2009, 05:14 PM

Hello Guys..
Today i was flying my Yak55 SP 2.6m Carf and something wrong happened i lost signal for 2 to 4 seconds, when it reached about 1 meter above the ground the signal came back and crashed the whole fuselage i left with alierons, elevators, rudder, landing gear, tail wheel, engine and all electronics
by the way im using
RRS
JR 9303 Radio
2 x R921 JR 9 channel recivers
2 x 3000mAh flight power li-po for recivers
2 x Dual sky regulators
1 x 2100mAh flight power for ignition
i lost the airplane after 10 minutes from the flight
This is the 2nd crash in the same place the first 1 was katana 50cc this was about a month ago, i dont know what happend exactly ?

can anybody help me please
Thanx

JoeAirPort · 10-29-2009, 05:18 PM

1st guess is the batteries were low or the regulators bottle necked the power to the servos...then you browned out the receivers. Especially if there were two receivers. What gear was common between the two planes?

S.Dubai · 10-29-2009, 05:23 PM

The battries was fully charged, i checked the wires before the flight
do electric cables affect the 2.4ghz ? because they were near by

yakpilot · 10-29-2009, 07:12 PM

Maybe the TX. I've seen those 2.4 ant.'s go bad causeing intermittent losses of control. Just one idea.

bodywerks · 10-29-2009, 07:57 PM

what's RRS? Was your tx antenna pointed straight out or straight up? do you have before pics? Is anyone else at your field having problems? If not, I would say there was something wrong with how you set it up or something wrong with your transmitter, like a broken antenna or loose antenna connection to the board(was a known problem in some of the first spektrum radios.

wylieruneyjr · 10-29-2009, 08:15 PM

Were you low and going straight away???? Seen that mask recepition before, unclear why.

MODE 1 · 10-29-2009, 08:21 PM

May or may not be of use. I used to fly in quiet part of an air base and the radar ( I am assuming) zapped me several times. I say this cuz you mentioned the same prob happened in the same place twice. Could well be signal interference.

2walla · 10-29-2009, 08:30 PM

My 2.6 yak is layed up a bit differently than some others I have seen. The entire nose/motor dome and tunnel is carbon fiber. I had it go into fail safe a couple of times.. I ended up putting 36" leads on all of the satellites and putting them as far aft as you could get in the fuse. While range testing you could definatly find the dead zone caused by the nose of the airplane. With that said, are you sure it didn't brown out from the regulators? Or did it go into fail safe/hold due to no signal reception?

3daviator · 10-29-2009, 11:44 PM

Is the 921 a power safe reciever like the 922 is? Not that brown out was your problem as mentioned above but, it might be worth having, just in case, if the 921 isn't power safe. Let us know what you figure out.

Mithrandir · 10-30-2009, 03:50 AM

RRS is the PowerBox Redundant Receiver System...

Click the play button to start.
Right click here to save the video

" title="You Tube" target="_blank">You Tube

://www.giantcircus.com/Videos/RRS_Explained.wmv
S.Dubai.... is the RRS still powered up after the crash??/ Did it show any FS's or Rx switchovers?

Mithrandir · 10-30-2009, 03:50 AM

RRS is the PowerBox Redundant Receiver System...

http://www.giantcircus.com/Videos/RRS_Explained.wmv

S.Dubai.... is the RRS still powered up after the crash??/ Did it show any FS's or Rx switchovers?

S.Dubai · 10-30-2009, 05:20 AM

I opend the black cover on the antena i found that it was not stright up, but still i have 4 satellite + 4 antenas out of recivers , they r pointing 1 up, 1 down, 2 left, 2 right and 4 in diffrent angels

S.Dubai · 10-30-2009, 05:24 AM

Maybe u r right yea both airplanes in the same place exactly just a couple of meters between both accicdents, i am worried that my Tx have a problem

	Quote: Originally Posted by MODE 1
	May or may not be of use. I used to fly in quiet part of an air base and the radar ( I am assuming) zapped me several times. I say this cuz you mentioned the same prob happened in the same place twice. Could well be signal interference.

S.Dubai · 10-30-2009, 05:27 AM

I was coming for landing about 10 meters above ground and i got the bad feeling when i lost the signals then crashed my fuselage =s

	Quote: Originally Posted by wylieruneyjr
	Were you low and going straight away???? Seen that mask recepition before, unclear why.

S.Dubai · 10-30-2009, 05:30 AM

It went into fail safe for a couple of seconds, it was near the ground when the signals came back so i couldnt recover

	Quote: Originally Posted by 2walla
	My 2.6 yak is layed up a bit differently than some others I have seen. The entire nose/motor dome and tunnel is carbon fiber. I had it go into fail safe a couple of times.. I ended up putting 36" leads on all of the satellites and putting them as far aft as you could get in the fuse. While range testing you could definatly find the dead zone caused by the nose of the airplane. With that said, are you sure it didn't brown out from the regulators? Or did it go into fail safe/hold due to no signal reception?

10-29-2009, 05:14 PM	#1
S.Dubai Uber Contributer Join Date: Aug 2009 Location: U.A.E, Dubai Posts: 176	Lost signal Hello Guys.. Today i was flying my Yak55 SP 2.6m Carf and something wrong happened i lost signal for 2 to 4 seconds, when it reached about 1 meter above the ground the signal came back and crashed the whole fuselage i left with alierons, elevators, rudder, landing gear, tail wheel, engine and all electronics by the way im using RRS JR 9303 Radio 2 x R921 JR 9 channel recivers 2 x 3000mAh flight power li-po for recivers 2 x Dual sky regulators 1 x 2100mAh flight power for ignition i lost the airplane after 10 minutes from the flight This is the 2nd crash in the same place the first 1 was katana 50cc this was about a month ago, i dont know what happend exactly ? can anybody help me please Thanx

10-29-2009, 05:18 PM	#2
JoeAirPort Obsessed Join Date: Jan 2006 Location: Milwaukee, WI Age: 47 Posts: 5,501	Re: Lost signal 1st guess is the batteries were low or the regulators bottle necked the power to the servos...then you browned out the receivers. Especially if there were two receivers. What gear was common between the two planes? __________________ Videos: 88" EF Yak http://www.youtube.com/watch?v=ynkFiYZOS7k 88" EF Yak http://www.youtube.com/watch?v=z1SD21qAJoA 110" EF Yak http://www.youtube.com/user/Vortran?.../5/UyaC9xGFKTk

10-29-2009, 05:23 PM	#3
S.Dubai Uber Contributer Join Date: Aug 2009 Location: U.A.E, Dubai Posts: 176	Re: Lost signal The battries was fully charged, i checked the wires before the flight do electric cables affect the 2.4ghz ? because they were near by

10-29-2009, 07:12 PM	#4
yakpilot Bad-ass Super Contributer! Join Date: May 2006 Location: Molalla,OR Posts: 617	Re: Lost signal Maybe the TX. I've seen those 2.4 ant.'s go bad causeing intermittent losses of control. Just one idea.

10-29-2009, 07:57 PM	#5
bodywerks Bad-ass Super Contributer! Join Date: Jan 2006 Location: Tucson Age: 36 Posts: 5,229	Re: Lost signal what's RRS? Was your tx antenna pointed straight out or straight up? do you have before pics? Is anyone else at your field having problems? If not, I would say there was something wrong with how you set it up or something wrong with your transmitter, like a broken antenna or loose antenna connection to the board(was a known problem in some of the first spektrum radios. __________________ Gmoney and Smarks are spooners

10-29-2009, 08:15 PM	#6
wylieruneyjr RUTNBUC Join Date: Sep 2008 Location: McClellanville South Carolina Age: 48 Posts: 1,748	Re: Lost signal Were you low and going straight away???? Seen that mask recepition before, unclear why. __________________ Here me Now, Believe me Later !

10-29-2009, 08:21 PM	#7
MODE 1 Has moved on Join Date: Jul 2008 Posts: 4,153	Re: Lost signal May or may not be of use. I used to fly in quiet part of an air base and the radar ( I am assuming) zapped me several times. I say this cuz you mentioned the same prob happened in the same place twice. Could well be signal interference.

10-29-2009, 08:30 PM	#8
2walla Bad-ass Super Contributer! Join Date: Apr 2007 Location: Walla Walla Wa Posts: 1,162	Re: Lost signal My 2.6 yak is layed up a bit differently than some others I have seen. The entire nose/motor dome and tunnel is carbon fiber. I had it go into fail safe a couple of times.. I ended up putting 36" leads on all of the satellites and putting them as far aft as you could get in the fuse. While range testing you could definatly find the dead zone caused by the nose of the airplane. With that said, are you sure it didn't brown out from the regulators? Or did it go into fail safe/hold due to no signal reception?

10-29-2009, 11:44 PM	#9
3daviator Bad-ass Super Contributer! Join Date: Jan 2006 Location: Simpsonville , SC Posts: 598	Re: Lost signal Is the 921 a power safe reciever like the 922 is? Not that brown out was your problem as mentioned above but, it might be worth having, just in case, if the 921 isn't power safe. Let us know what you figure out. __________________ Save a Kid today !! http://www.generationrescue.org/resources/vaccination/ http://www.lewrockwell.com/miller/miller15.html

10-30-2009, 03:50 AM	#11
Mithrandir Bad-ass Super Contributer! Join Date: Jan 2006 Location: High Desert California, USA Age: 50 Posts: 5,690	Re: Lost signal RRS is the PowerBox Redundant Receiver System... http://www.giantcircus.com/Videos/RRS_Explained.wmv S.Dubai.... is the RRS still powered up after the crash??/ Did it show any FS's or Rx switchovers? __________________ TEAM FUTABA TEAM DURALITE FLIGHT SYSTEMS Hacker Brushless USA GP38% Video-Page

10-30-2009, 05:20 AM	#12
S.Dubai Uber Contributer Join Date: Aug 2009 Location: U.A.E, Dubai Posts: 176	Re: Lost signal I opend the black cover on the antena i found that it was not stright up, but still i have 4 satellite + 4 antenas out of recivers , they r pointing 1 up, 1 down, 2 left, 2 right and 4 in diffrent angels

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