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Post by dracer247 on Jan 29, 2015 15:12:03 GMT 1
The last flight on my sc, it took off like normal then immediately turned hard right and would not respond to my controls! Needless to say it ended up in the top of the tree. I was able to get it down and surprisingly no damage :-). Anyway I get it down and check everything out and everything appears to be functional. The only change I made to it pre-flight was swapping to the 10x8 propeller as I usually pack a go pro underneath. I didn't have it on for this flight. Trim settings are all neutral so my question is, is the new propeller grabbing to much air and causing a torque twist? Or maybe just a one time fluke?? Thanks ahead of time for any advice!
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Post by flydiver on Jan 29, 2015 18:28:27 GMT 1
You best check EVERYTHING carefully and do a range test before you fly again.
Be aware the 10x8 prop pulls ~19A at full throttle and the ESC is only good for ~13A.
(Of course Horizon doesn't tell you that). Too much full throttle and you won't have any control when it fries ($50 to replace). Keep full throttle to 30 second or less intervals with a cooling period between.
A smaller prop would have less torque effect. A hard right turn with no control is not torque, that's something screwing up; signal loss, servo glitch, something loose, something caught, etc.
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Post by dracer247 on Jan 30, 2015 7:42:37 GMT 1
Thanks flydiver! I'm new to all this so the info is very much appreciated. I'll switch back to stock prop, I only put the 10 on to pack a gopro. Checked EVERYTHING, all is well and works... Not sure what happened now
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Post by sham on Jan 30, 2015 8:07:36 GMT 1
I actually think that with such a low powered plane, and assuming the trimming isn't perfect anyway, that it could pull like that just with so much more thrust.
But Fly is right. That's too much prop for a land based cub and will burn it up.
On the next flight, with the right prop, be ready for it to pull and then once corrected and at height you can see if the trimming is out and correct it after landing.
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Post by flydiver on Jan 30, 2015 20:37:21 GMT 1
Depending on where you put the gopro you could have messed up the CG. A tail heavy plane is very squirrely, a nose heavy plane is sluggish.
That's a fair amount of mass and drag....on an already draggy plane.You also might have stalled it. Once a wing stalls due to inadequate airspeed you are out of luck unless you have enough ground clearance to get up to speed and get the wings lifting again. In a stall your controls simply would not work, nothing....dead....bad news. Too close to the ground > in you go.
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Post by coupe1942 on Jan 31, 2015 0:30:30 GMT 1
Me, I believe that a GoPro is just not a suitable camera for the SC. If you use it without the case, it is very risky for damage in a crash, especially if you use it with a SC that has floats. Once you add the camer and case, the CoG is too easily altered and the plane may carry the camera and setup, but not without risk. Add the tripod mount and you have a tad more weight to contend with. There are just too many other cameras that offer less weight and less price if the camera is dunked in water or lost in a crash. The Mobius is a good camera to reduce weight and many of the 808 key chain camers of better quality are cheap to risk on an SC. I just feel the GoPro has much better uses on different planes as the Bixler than the SC. Personal choice as to what camera you want to use, but from my experience with different mountings on my SC with a GoPro, I just don't see the money investment worthwhile for such a risk. This is not even taking into account the price of repair parts, if a crashed plane is salvagable. There are just too many other cameras to use with the SC, other than an expensive GoPro. Heck, when I smashed on my maiden and also lost my Mobius, at $79 bucks you would have thought I was that proverbial baby whom someone had taken candy from with all my whining and crying over the loss of a camera at that price. Just imagine my shenanigans if I lost my 200-300 GoPro. :-)
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Post by dracer247 on Jan 31, 2015 2:23:54 GMT 1
I didn't have the gopro on that flight, took it off just in case lol. I agree tho, I've had a lot of good flights with the gopro. But took it off for good, I agree with the risk and cost.
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Post by dracer247 on Jan 31, 2015 2:42:03 GMT 1
Also the plane didn't stall, it took off at full throttle and immediatly banked hard right into a tree, it was a 15 second flight. I just recently did the tape mod on the wings and removed struts, maybe this along with the propeller are the problem? I did also try to turn right as well and nothing.....
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Post by flydiver on Jan 31, 2015 2:50:23 GMT 1
Also the plane didn't stall, it took off at full throttle and immediatly banked hard right into a tree, it was a 15 second flight. I just recently did the tape mod on the wings and removed struts, maybe this along with the propeller are the problem? I did also try to turn right as well and nothing..... I don't know where you got a 'tape mod' + no struts recommendation but that idea is pretty much completely foolish. Tape alone will not control the flex adequately. You either use struts, or imbed some kind of sturdy rod (carbon, bamboo, etc) to support the wing. Even then you have to do a decent job. If you are using camera weight this is even more important unless the camera is one of those 10g tiny jobs. |
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Post by dracer247 on Jan 31, 2015 18:02:43 GMT 1
Ok I removed tape and put struts back on! Checked electronics and found something interesting. I turned on my controller and it synced with plane but then the safe system wouldn't work. Turned the controller off then back on and it worked again. It's done this twice now since I've gotten it. Is something wrong with my electronics or is it just a glitch?? Im now thinking a combination of the tape wings with no struts, the bigger propeller and the electronics caused crash. I have trimmed everything perfectly on the ground but will trim in air. Getting ready to go fly it now, will let you know how it works. Thank you everyone for your advice!!! You guys make it easy on this noob.
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Post by flydiver on Jan 31, 2015 18:39:36 GMT 1
I turned on my controller and it synced with plane but then the safe system wouldn't work. Turned the controller off then back on and it worked again. It's done this twice now since I've gotten it. Is something wrong with my electronics or is it just a glitch?? I've never used SAFE so can't comment on it. I strongly suspect it should either be on or off and not arbitrarily toggle between the settings. OTOH, when it's OFF it should not compromise the plane any more than voluntarily turning it off. I'd check the connections-plug and unplug and check the mounting. It has to be horizontal and firm, not loose. This might be one to talk to Horizon about if that doesn't work. |
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Post by sham on Jan 31, 2015 19:03:03 GMT 1
If the plane is having problems with the SAFE technology, it could be that the AS3X part is also having problems and moving control surfaces.
Ensure you are following the instructions on powering it up, the plane must be totally still for a period of time after powering on for the system to set.
Having the wing flexing more than it should really wouldn't have been helping though, the complex gyro systems are programmed for a stock Supercub. Any changes will cause b unpredictable behaviour.
If its switching on and off unpredictably, ensure you're following correct procedures - but it sounds like its simply faulty.
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Post by flydiver on Jan 31, 2015 19:39:38 GMT 1
BTW, limited tape on the leading edge and tips to protect the wing is fine. Tape won't support much of a load though.
Some folks hear about tape reinforcement and try to make the SC 'newbie-proof' by taping everything. This just makes it heavy all over and contributes to flying crappy, making it more prone to crash.
When you do reinforcement you have to figure what you are reinforcing, why, and what the consequences might be. No tape will protect a plane from a 50' nose in, nothing will.
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Post by dracer247 on Jan 31, 2015 22:45:38 GMT 1
Just took it out and it flew perfectly! Thanks again everyone. I was moving the plane to much after plugging in battery so you guys were absolutely correct, all is right now! Batteries are charged so back to it, beautiful sunny day with a mild 3 mph wind :-)
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Post by sham on Jan 31, 2015 22:49:40 GMT 1
Often the most simple answer is the right one. Glad all is well.
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