Philip Lewis 3
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Posts posted by Philip Lewis 3
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If the model flops easily to the U/C then a few suggestions, it likely (as has been said) hasn't achieved full vertical so is still leaning towards the U/C, try doing it in front of you model side towards you to check vertical is actually being achieved, and if you can, max out the rudder throw, the more the better, you actually need more than a bit of power, I do stall turns at half throttle and chop the power as I hit the rudder, in a true stall turn the model has stopped so the one and only thing that is going to turn it is the prop wash over the rudder, so you need more than just a bit of power.
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3 hours ago, Billy said:
Thanks again - I have just watched a 40 minute video on calculating these requirements and was not looking forward to trying to work this through for myself.
There is actually a really easy way to do this, E Flite range of motors are named after their 2 stroke glow equivalents exactky for this purpose so an E Flite power 46 is the electric equivalent of a .46 glow.
Of course you don't need to actually use E Flite motors just buy one of the same size, KV and max amp rating from another range.
No need to complicate it more than that.
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Or you can put the prop on and run the motor up slowly, if you sstart to approach the max current rating before full throttle is reached then it's to big, as said above you can go down in either pitch or diameter it all depends on type of model it's in, an aerobat might use something like a 14X10 something scale would use more diameter and less pitch.
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30 minutes ago, Basil said:
Philip, how do you know what that figure is?
You need either a watt meter or the appropriate telemetry sensors, a 500kv motor is probably suitable for 4 to 6 cell LiPo's, 500 watts at 6 cell 24 volts (roughly) is around 20 amps. Most motor makers quote max current rather than max wattage because it's the current that will destroy the motor if exceeded.
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You are looking to not exceed the current rating of the motor.
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Close, I only charge my LiPo's to 4.17 v per cell anyway which is about 96% so 4.18 will be 97%-98% charged.
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1 hour ago, Ron Gray said:
Speaking for myself and not hearsay, I upgraded with no issues. I also know of 6 other club members who had the same results.
Likewise with 3 TX's and their modules and over a dozen receivers, all done OTA, the only issues I've seen on the FrSky facebook group and RC groups have been down to user error, most if not all resolved with doing a wired update.
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The X20S doesn't have the twin protocol in it so will never bind to a twin receiver, it has TD Access and ACCST V2, if you want to use a twin receiver you are going to have to put a Twin module in the back.
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Either use the NiCad setting to start of the charge then after a few minutes revert to LiPo charging OR connect two of the same LiPo's together with the good LiPo at storage charge only) through the balance leads (using a parallel charge board to do this), after a couple of minutes reconnect to the charger and charge normally. This works best for me with small batteries, large batteries might not be fully recoverable so test thoroughly.
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Well I've always said if you can't charge all the batteries you want for a days flying all in one go you'll soon get fed up with electric flight which means that I need to charge twelve large packs plus small four receiver packs.
The ones that I have use two of the small fans that most chargers use so pretty much no difference between these and other similar chargers, besides which it's academic because I would never hear them over the two servo power supply's!
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I've got five of the HOTA F6 Quad Channel Chargers, a couple of which are over three years old, best chargers I've ever had with so many useful features, can't speak for the others.
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3 hours ago, Witterings said:
Probably also going to do as @Sheepish suggested and convert a server as well for the longer term.
I've made literally dozens of these over the years.
Very high output, up to 87 amps, I use two of these to power two quad chargers each so in effect eight chargers for each power supply with each charger charging a 5 cell 5,000 mah pack so eight batteries per power supply being charged.
If you go down the route of converting a servo supply make sure you know how to turn the 12 supply on, for instance with these ones you short together the three pins in the photo.
However beware, high power they are and very compact too, but the one thing they definitely aren't is quiet!
You also need to use at least 12 awg wire from the supply to the charger and that assumes you have two + and two - connections of you'll get too much heat in the wires.
The good news however is that these are in effect electrical waste with virtually no demand for them, the last lot I bought were advertised on e bay at £30.00 each plus postage at cost and they had 12 of them, I offered to take all 12 for £100 and they pay the postage, and they accepted the offer.
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You can do multiple things, for example voltage against current in excel
Or all data in something like the free programme Flow csv viewer
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Valid data is definitely there, this is your csv file opened in excel, so exactly what are you trying to achieve?
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I'm wondering what the difference is between the two files that are both .csv files but that appear to be from the one flight, one is called ._00001187 the other just 00001187, if you care to attach the files here we might be able to help a bit better (no guarantee of that though)😁
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Go to File, then import, there are a couple of csv options there, try both?
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A .osd file is an open document spreadsheet, click the arrow next to it and if available change it to all files, then the csv file should appear so click that and see if that works.
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In your last photo showing dataExplorer open go to the file option on the top left and open the file you want to look at from there.
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If you're still having trouble then if you post the .FLD file here I'll have a look at the file structure and see if there is an alternative way to do this, it's got to be a pretty simple prcocess.
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I do, a few hundred cycles, on the basis that electronic items, if they are going to fail, normally do so when quite new, if they pass then they should have a long life, known as the bathtub curve.
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I'm not a Futaba user but I can tell you that you won't be able to open those files in any programme because they are a Futaba specific file type so you need to use Futaba software to use them.
Specifically you need to use the Futaba telemetry log converter software and instal it then you can convert the files to a .csv file and view in a spreadsheet such as excel.
However it appears that this is Windows only and IOS isn't supported so you might not be able to use it, however the Futaba instructions are attached.
Hope that helps to explain it.
Phil
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Having had a quick look at the U Tube vid it appears to me that you won't get any telemetry unless the receiver and sensors are connected and powered up so my guess would be no telemetry no log files, power everything up, no need for an actual flight, then see what is on the SD card.
I'm a bit curious as to what logging interval means, I might be tempted to make that one second rather than twenty but I'm a bit confused by it (and the manual is most unhelpful).
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It should create file (or files) but only when the logging is actually turned on. I have no knowledge of Futaba but would expect that you would also need to tell it which sensors to log as well as which not to, also if it is only logging telemetry then you might not get anything until there is some telemetry being actually received.
Your Mac can graph the data in a .csv in many programmes such as Excel, .csv is simply a universal file format that can be read by any computer.
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If it were me I would make it up as a seperate stand alone wiring harnes with your chosen male and female plugs each end and splice the voltage wires into that.
That way you will be able to insert it beween the esc plug and batery plug and therefore simply and easily be able to move it from one plane to another, simples.
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Thinking of leasing an Electric car, anyone had experience in this?
in Chit-chat
Posted
Same source as they use to get the C rating for LiPo's 🤣