Gliders > Thermal / Flat field

lost signal

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andrew wallace:
strange thing happened today went from being in a thermal to losing all radio contact and smashing the model  :shock:
no idea what went wrong checked battery 85% power left done a range check all ok  
i use a spektrum AR6255 receiver with a Turnigy SBEC regulator and flightpower 7.4 volt 1345 mah lipo battery
and the model was a dick edmonds 100" algebra

i'm gutted  :cry: thermals where good  and was having a ball

rogallo:
http://www.rcgroups.com/forums/showthread.php?t=1649016

looks like it may not have been the first, sorry for your loss, Algebra is a great model

Happy Days:
What a Bars***d! All the worse when it’s not your plane! :cry:

I remember when I had my very first glider flight. It was one of Joe’s polyhedral models. Flying off the west slope on Big L, the wind got a bit strong and started blowing the plane back towards the slope. Further and further back  it came. Then suddenly it just seemed to be pushed back over my head and disappeared over the forest! :shock:

“Er,….Joe, you know that model you lent me 20 minutes ago? Well it’s just disappeared somewhere over a hundred acres of forest land. :oops:  :oops: ”


If you lost control and the model was in line of sight all the time & the battery was 85% charged my trail of thought would go towards the rx or the sbec.

K.

andrew wallace:
i've flew this receiver in another thermal model and never had any problems, come Monday it will be back with horzion
the sad thing is i've been flying this model on those orange receivers you get off ebay for a few quid and never had any problems and the only reason i changed was i was to fly in a 100" competition last weekend  :shock:

you could fix the model but you're just adding extra weight the both wings are creased as well  :( so i would say it's a right off will change it into a slope model

as for the battery i checked it on the tester and both cells are showing good voltage and capacity

the sbec well how would you ever check if there was something not right that was my second or third flight when that happened can regeulators over heat ??

Happy Days:
High speed switching regulators don’t normally suffer with “Thermal Dissipation” problems. (Please pardon my lapsing into pompous sounding drivel :roll: ) That’s one of their main advantages over older type  ‘Linear’ regulators. (They’re also smaller and lighter than linear regs‘) But there are plenty of other things that can go wrong with them.

Just as an aside, switching BECs (regulators) tend to emit high levels of RF noise than can effect 35Mhz rx’s. Not a problem in your case Andy, but as I said there are other things that can go wrong inside a SBEC.

Hmmm, if you’ve flown the rx in other models without any probs it kinda suggests it’s okay. Have you used this SBEC before? If not then I’d say that’s potentially where the problem is, even if it works okay now there could be an intermittent problem in it.

It’s very unsatisfying when you can’t get to the bottom of a problem isn’t it! :evil:

K.

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