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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Throttle went to idle and then came back to life.....pls help.
09-08-2006 04:34 PM  14 years ago
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reilly13

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Binghamton, NY

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Throttle went to idle and then came back to life.....pls help.
I've searched for an answer but not found a solution on the boards here so I'll explain.

Two times now (4/5 flights apart) I've gone streaking by and pulled up into a stall turn and right near the top the engine cuts to idle and after a second, maybe two it comes back to life, scares the hell out of me though!
It's a raptor 50 hyper with GV1 running 620's. At first I thought it was too lean but it didn't quit completely and actually idled very nicely during the horrificly quiet pause. So my second thought was low battery and the fail safe kicking in on the governor?

Does it cut to idle permanantly when the fail safe kicks in or will if give control back if the voltage comes back up? During that relatively simple maneuver one could potentially be using all the servos and draw the battery down temporarily but I didn't know if the GV1 would give give the throttle back, I guess that's what I'm really wondering.

Thanks-John
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09-08-2006 04:42 PM  14 years ago
gearset

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Thunder Bay Ontario

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do ypu have a pcm radio? it could be that or you throtal curve isn't set right. It sounds silly but look anyway.Livin'............
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09-08-2006 04:48 PM  14 years ago
JKos

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Redondo Beach, CA

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Does this happen on the first flight of a freshly charged battery pack? Or, does it only happen after several flights?

What receiver are you using? Some recievers also do a low voltage throttle pull back.

According to the GV-1 manual page 44, no, it does not automatically bring the throttle back up. To get control back after going into battery fail safe, throttle must be put at mininum throttle.

- John
RR rules!
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09-08-2006 05:27 PM  14 years ago
reilly13

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Binghamton, NY

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I've got a Futaba PCM receiver, can't remember which one, (9cap trans)and two 2300mah NIMH batteries.
I can usually easily get two 20 minute flights (90 size fuel tank) and the volt monitor still reads well up in the green.
If my memory serves me this happened in the second tank of the day both times.
I can't remember the voltage color level the first time it happened but yesterday after this happened (30+ minutes total time)when moving both sticks around I could get it down into the orange, which IS lower than normal after that much flying.
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09-08-2006 05:45 PM  14 years ago
reilly13

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Binghamton, NY

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I forgot about the receiver fail safe function but after checking on that, it's the same as the GV1 for getting control back. Gotta pull the stick to idle (full negative pitch) to get control back and I didn't do that. Stumped.
I'll check the curves when I get home, but I think I set up some basic curves for all three. Have only used the normal one and counted on the governor for the inverted stuff even though there are curves as backup.
-John
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09-08-2006 05:53 PM  14 years ago
cub2000

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Massachusetts

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I had this problem when I pulled the throttle stick down all the way during flight. It triggered the gv-1 delay causing the engine to idle for a few seconds.
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09-08-2006 07:02 PM  14 years ago
Chopper

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Stow,Oh- oops, I mean St Louis, nope Stow again,

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It sounds like low battery to me....assuming you have the throttle curves right.Paul Soha is a free agent now. Wow.
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09-08-2006 08:49 PM  14 years ago
reilly13

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Binghamton, NY

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Forgive me if I' not understanding something horribly obvious, but once the governor takes control of the throttle and wants to hold X-rpms what do the curves have to do with anything? I assumed they had no effect and I only roughed them in so I wouldn't auger in from 3" inverted if the governor quit.
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09-08-2006 09:23 PM  14 years ago
gamedemon3000

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Goose Bay, Newfoundland & Labrador, Canada

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magnetic sensor or optical? this could be caused by an optical sensor because of sunlight when you get vertical.Derek O'B
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09-09-2006 01:23 AM  14 years ago
reilly13

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Binghamton, NY

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Magnetic.
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09-09-2006 02:14 AM  14 years ago
nighttrain

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Louisville KY

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The GV-1 goes to idle for one second as a low battery warning then gives you back the operation. It's a low batt warning telling you to land.
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09-09-2006 02:16 AM  14 years ago
JKos

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Redondo Beach, CA

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> The GV-1 goes to idle for one second as a low battery warning

Interesting as that doesn't match the manual, but I do believe it.

- John
RR rules!
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09-09-2006 03:43 AM  14 years ago
jadams

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East coast USA

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John, spend the money on a lithium and a regulator!! We gotta fly before winter!!

Jordan.
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09-09-2006 07:07 AM  14 years ago
Furious Predator

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Kitchener, Ontario, Canada

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you would be surprised how low the battery get get under flying conditions!!

with a freshly charged 2300NIMH pack, during basic mild 3D, my volt watch recorded a peak min of 4.3Volts. on the Second flight of only 10 minutes each, i could get down to 3.9-4.0 volts.

after seeing what kind of voltages i'm getting in flight, i'm saving up for a lithium/regulator setup.
Shawn
Team Leisure-Tech
Team HelixRC
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09-09-2006 05:58 PM  14 years ago
reilly13

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Binghamton, NY

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adams, what's you're schedule this week? I'm possibly free thursday maybe tuesday too after work.

I figured TWO 2300 mah batteries would last me at least the 40 minutes I typically fly but I think the Triton isn't fully charging them, even a full discharge to charge only puts in around 2000 in each pack. Have to save up for a lith and reg if I can't get it ironed out!

If that's the case with the GV1 I do like having that little warning....as long as I'm not inverted!
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09-10-2006 06:11 AM  14 years ago
av8er

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NH, USA

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sure you were in idle up? While doing the stall turn, the governor will disengage if you were below certain stick position (1/4 stick?) for zero degrees, which you would be at/below if you had your hover set at 1/2 stick.

Battery still an option...Fast charges somtimes deceiving in what they read for voltage also.
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09-10-2006 03:51 PM  14 years ago
reilly13

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Binghamton, NY

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Yeah the governor isn't set up like that. I'm either in normal mode transmitter curves or governor controlled idle up 1 & 2. The governor is turned on by a switch not the stick position. I'm leaning towards the battery being low.
The last 3 times I've tried to top off with the triton it put in 90ma exactly so somethings not right there. What are the chances it would put 90 in three times in a row?
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09-10-2006 05:02 PM  14 years ago
cmsilvoy

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Durham, NC

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It's Futaba's battery failsafe function for sure. It's a function of the rx.
It does not matter where your failsafes are set, what governor you are using, etc.
It gives you time to land and shut down before things go terribly wrong.
You need to recycle (ie, get rid of) that pack and get yourself a new one. Sounds like you have lost a cell or two in that pack.

Chris
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