Dickw Posted January 14 Share Posted January 14 13 minutes ago, Outrunner said: I don't think it's an overheating problem as you said your esc let the smoke out on connection. If you're using 6s lipo you might want to fit anti-spark connectors, not sure if having sparks wrecks ESC's though... I use 6s, 9s and 10s without any "anti-spark". Not had any problems yet over many years, so I would be surprised if sparks were an issue here. The spark actually tells you the capacitors are OK, so some people think they are a good indicator of a healthy ESC 😀. Dick 2 Quote Link to comment Share on other sites More sharing options...
GrumpyGnome Posted January 14 Share Posted January 14 Indeed. You are now due about 5 years of modelling good luck...... 1 1 Quote Link to comment Share on other sites More sharing options...
toto Posted January 14 Author Share Posted January 14 I'm not complaining too much. The set up this far has proved to be reliable and has given me a reasonable run at unhindered flight. I know it should have been good for many more flights but sometimes ..... it just happens. I will be in the ahed later and will Post up some photos showing where the ESC is currently located ( cramped conditions ) and look at how I could possibly move it to another location although I had looked at this before and was hindered by cable lengths. Let's try again. Toto Quote Link to comment Share on other sites More sharing options...
Philip Lewis 3 Posted January 14 Share Posted January 14 You might want to put in a back order for one of these as a bit of insurance for the future, these are stupidly cheap for what they are (a very good copy of a much more expensive YGE Esc), they have anti spark and over temperature protection built in and the ones I've had (although I used the HV versions) have all been bullit proof and still going many years later. BTW you can use as bigger ESC as you want without any trouble so a 100 amp ESC on a 40 amp set up is fine. Quote Link to comment Share on other sites More sharing options...
Rich Griff Posted January 14 Share Posted January 14 (edited) Yes, as above in so much that you do not run your car engine at full power, or even 85 percent full power for most of the time... Unless it's a racing/rally/off road/completion car or similar.... One new part ( or even a rtf plane/model or whatever... ) Failing, **** happens. Same product fails again, coincidence, **** happens. A third failure, something is wrong.... Hospital medical notes go missing after a medical test, """" happens as hospitals are very big busy places. Same notes when found go missing again, coincidence, same reason. Same notes when found again go missing......... The specialist nurses etc. agreed, something is very wrong... NHS/hospital notes computer system even after many years and millions and millions written off ( waterfall effect ??? ) Still not working properly... Sorry NHS but it's true, but thank you so so much for saving my life again recently.... Toprc spit and bf109 mark two ? , I wonder why ? ( Update on that bitter bag of sweets shortly ... ) Anyways, stay focused and methodical toto... Picture of esc "internals" ? Ps don't give up on your broken trainers until they have grown so fat ( due to repairs ) they will not fly very well at all any more. You have them in front of you so can always make a new fuz/wing etc.... Edited January 14 by Rich Griff 1 Quote Link to comment Share on other sites More sharing options...
toto Posted January 14 Author Share Posted January 14 Hi Rich, Pictures of ESC internals coming up very soon. I fell asleep on the job last night .... maybe the fresh air done me good. I need to get my Tasman dis assembled to give me working space in the shed. I'll do that first then put the Domino on the operating table. I'll be back. Toto Quote Link to comment Share on other sites More sharing options...
Rich Griff Posted January 14 Share Posted January 14 Yep, fresh air will do that, but so will carbon dioxide/ monoxide, you will never wake up with that stuff as you know... Take your time, no real rush... Ps, get the taris button to work ! Quote Link to comment Share on other sites More sharing options...
toto Posted January 14 Author Share Posted January 14 So, all the trials of the blown ESC now moved to its own post. As far as flying goes, all is back on for next weekend. The Domino is already armed with another ESC ( of the same kind ) and as a belt and braces perspective, I will have the Tasman onboard as a second model backup. The idea is ( not to complicate things by adding a second model ) but just to have something there should it be needed. There is nothing more frustrating than travelling all the way to the field just to be let down by a technical issue. The Domino will be good to go as my No1 go to model as we have been used to flying this now ..... largely with no issues. In the main..... its a good reliable model and I love flying it now that I am making some ground. The Tasman ..... second fiddle and to make the most of a bad situation should it arise again. It is more or less in a state of readiness only needing to be tethered to the NX6 buddy box transmitter. It is already set up to the NX8. Tethering the NX6 will be tomorrow nights task. until then ...... cheers toto Quote Link to comment Share on other sites More sharing options...
toto Posted January 16 Author Share Posted January 16 So, a bit of a plan is hatched for the weekend coming. The forecast looks grim temperature wise so if the minus 5 or minus 10 is to believed .... flying itself could be off the cards. However, the club shed with its heater may allow for some tinkering both in terms of putting a resistance test over the Domino's motor ..... and...... checking 9ut the Tasman to have ready and willing as a separate standby model. This has been discussed with my mentor who is happy to do both and have the second model available for any potential future technical failures. That's the plan potentially for Saturday. I need to link the NX8 to buddy with the NX6 for the Tasman. Also check the nose wheel alignment on the Domino as the steering is a bit out. More homework. Toto 1 Quote Link to comment Share on other sites More sharing options...
Geoff S Posted January 16 Share Posted January 16 Toto, there is no point at all in checking the motor with a multimeter. It will tell you nothing. If it runs and there are no mechanical issues (eg rubbing on the mount) then there's nothing wrong with the windings. That's supported by your own figures from your Wattmeter tests. Quote Link to comment Share on other sites More sharing options...
toto Posted January 16 Author Share Posted January 16 No worries Geoff. Toto Quote Link to comment Share on other sites More sharing options...
GrumpyGnome Posted January 17 Share Posted January 17 Toto, did I read earlier that you're down to about 84 wpp on thus now - I haven't trawled the threads but I thought it was previously higher. What else has changed? I may, of course, be mis-remembering 🙂 Quote Link to comment Share on other sites More sharing options...
toto Posted January 17 Author Share Posted January 17 Hi Grumpy, You are correct. I'll go back through the previous watt meter readings that were originally posted and compare against what I now have. Good point. Toto Quote Link to comment Share on other sites More sharing options...
toto Posted January 17 Author Share Posted January 17 Hi Grumpy, Done a check. Originally I was getting a watt reading of 571.20 ..... divided by the weight of 2.8 kg gives 6.7 lbs 571.20 divided by 6.7 lbs equals 85.25 watts per pound The recent readings were 522.70 divided by 6.7 lbs equals 78.01 watts per pound. There is a drop. Maybe I will take these readings again. Toto Quote Link to comment Share on other sites More sharing options...
GrumpyGnome Posted January 17 Share Posted January 17 10% drop is quite significant.... you changes the prop? Quote Link to comment Share on other sites More sharing options...
Frank Skilbeck Posted January 17 Share Posted January 17 Or cold battery? 1 Quote Link to comment Share on other sites More sharing options...
toto Posted January 17 Author Share Posted January 17 Have not changed the prop but maybe the battery was cold and not quite 100% charged ....... maybe 93 %. I can try again on a fully charged battery Toto Quote Link to comment Share on other sites More sharing options...
GrumpyGnome Posted January 17 Share Posted January 17 👍 Quote Link to comment Share on other sites More sharing options...
Dickw Posted January 17 Share Posted January 17 1 hour ago, toto said: Have not changed the prop but maybe the battery was cold and not quite 100% charged ....... maybe 93 %. I can try again on a fully charged battery Toto "Cold" makes a bigger difference than many people imagine. Comparative tests need to be at roughly the same battery temperature. Dick Quote Link to comment Share on other sites More sharing options...
GrumpyGnome Posted January 17 Share Posted January 17 Indeed - comparative tests need to be very consistent...... Probably one of the reasons I rarely do such things. Quote Link to comment Share on other sites More sharing options...
toto Posted January 17 Author Share Posted January 17 Well ..... Everything comes to a halt. .... way too cold for the shed at the moment. I usually put on a wee 2kw heater which warms things up nicely but to be honest .... I can't face it at the moment... Just too cold. I wouldn't put a milk bottle out in that. So I've just succeeded in delaying all the odds and ends I need to do until tomorrow night .... the last minute really. Look at the nose steering wheel on the domino as its tracking off a little so the servo linkage must be slightly asque. Do a rerun of the power meter tests with a known fully charged battery, charge batteries for both the Eomino and the Tasman and give the Tasman another check over as well as li king the master TX to the slave for the Tasman's bury box connection. I bet I'll regret not going out tonight ..... Toto 1 Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 17 Share Posted January 17 I know what you mean Toto. Over here it would freeze the barnacles of a brass monkey 🙊 1 Quote Link to comment Share on other sites More sharing options...
toto Posted January 17 Author Share Posted January 17 Funny you should say that ...... I just looked out the window to see a brass monkey frantically running around looking for a welder. 2 Quote Link to comment Share on other sites More sharing options...
Peter Jenkins Posted January 18 Share Posted January 18 Like much of our language, "freezing the balls off a brass monkey" comes from the Royal Navy. The brass monkey was what you placed cannon balls in but as the brass contracted more than the iron cannon balls, when it got very cold the brass monkey reduced in size significantly thus allowing the cannon balls to fall off! Here's another one. A square meal. When a sailor joined a ship, his plate was cut off a wooden plank so that it was literally a square plate. Sailors got fed regularly on this square plate hence the term. Some of the older hands used to nail little pieces of wood at the edge of the plate to stop the gravy running off. These were called fiddles. So, anyone on the fiddle had a modified plate. There are loads more of these expressions that we use today without knowing their derivation. In the days when the RN ruled the waves, there were a lot of seamen who spread this terminology when they came home. 1 Quote Link to comment Share on other sites More sharing options...
toto Posted January 19 Author Share Posted January 19 Well ..... Come hell or high water ..... I need to brave the shed today. It actually looks a little milder so .... not so bad. As far as topping up batteries go, I've maybe done myself a favour. Charging the night before rather than two days before. They shouldn't lose as much of their charge over one cold night. I have no way of keeping them warm other than bringing them indoors once charged in a lipo bag ......... but I'm really not keen on that. I would have around eight to ten. Four or five for the Domino and the same for the Tasman which is going down as a support ( 2nd model ) and for an initial check over by my mentor. Whilst the batteries are charging, I'll check out the nose wheel alignment on the Domino as well as it seems a bit out when taxing for take off. I also need to rig up the NX6 to the NX8 for the Tasman although this will be the last priority as the Tasman can be fully checked over and maidened on the NX8 by my mentor. ...... although I know I will be gagging to have a flight with it if its maiden goes well. That's what is on for today / tonight. ....I cant really hit the shed quite yet as I am awaiting a potential call on another new contract.... and cant afford to miss it. The signal from the shed can be a bit patchy at times unless I leave the door wide open ..... too cold for that nonsense. Out for now Toto 1 Quote Link to comment Share on other sites More sharing options...
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