AJ

Lookup fresnel zones on google. You were in it, the wet ground will have enhanced the effect. Bruce on rcmodelreviews did a good youtube vid on the subject recently AJ.

There is an easier way to recover a lipo. Just parrallel up the dead battery with a second fully charged lipo through the balance connector and leave it somewhere safe for a day or so. This will equalize the voltage between the two batteries. Both will need a proper balance charge afterwards. A.

Keep the perfectly good phon e you have for making calls and get a cheap tablet for running the apps. The are two seperate tasks and are better served by two seperate devices. AJ

For modeling you probably won't use the negative supplies, they are generally used for amplifier circuits where you have to deal with ac signals that vary above and below 0 volts. AJ.

A 0.5A supply will charge your lipos it will just do it very slowly, so perhaps not the best way. Instead connect it to a spare BEC and use it to power a servo tester. AJ

Just buy one of the plug in battery checkers on ebay for about £3 then fly until it starts beeping at you. A.

The issue with the reverse charge is not that the cell is going to take a reverse charge, for various technical reasons and as observed that's not going to happen, the problem is that the charge current is going to be applied in reverse to the dead cell. That is a very bad thing to do, especially to a lipo. In fact if the cell could take the reverse charge and store it then it wouldn't be bad at all, but because the cell is unable to store the charge then the only thing it can do with the energy applied is to turn it into heat. Whether this is a problem depends entirely on the cells ability to lose the heat generated. If it can't dissipate it more quickly than it is generated then bad things will happen. Simply saying that 200ma should be fine is misleading, it may be ok or it may not be. The only sure safe way to discharge any battery is to do each cell individually, fortunatly that is easy to achieve with our lipos as we have access via the balance plug to each cell. Use this to discharge and never try to discharge via the main series connector. A.

"Mode 1 first (attempt)" then people learnt better and along came mode 2

Bruce on the rcmodelreviews youtube channel has one of these. He has done a number of videos comparing diferrent props and motors. Worth a look A.

Gangster, digital tv and mobile phones are quite differrent systems from our radios. Digital tv only uses a single transmitter in any given area so never has to deal with channel contention. It is a simple time sharing system used to send multiple (tv) channels on a single freq. Mobile phones work on a master slave principle so although there are loads af transmitters (phones) they are all controlled by a master at the base station which allocates time slots and freqs so avoiding contention. Contrast this with dsm2 which just listens for two spare freqs at switch on and then tries to work just using those two. There is no coordination between tx so if someone else switches on out of range of your tx then they could easily choose one of the same channels you are using and block it, so now you only have one usable freq. If both freqs are blocked then you lose the link. Dsmx meanwhile uses multi channel freq hopping so is able to dynamically avoid blocked freqs as they appear And so is much more resilient. A.

Hi Peter, I didn't realise Dremel made a glo powered version A.

When we had our windows changed I saved a 2 X 4 glazing unit and laid a same size sheet of plasterboard on top. The plasterboard takes the pins and the glass keeps it perfectly flat. A.

To late. Price back up to £92 & no stock left. A

Rather than just joining the batteries in parallel you should join the cells in parallel then you would only have 1 balance lead. A.

Banggood have really great cust service. No quibble, just send you another if probs. Typical Chinese quality can be a bit hit & miss but thats reflected in the price. Don't expect next day delivery, can take four to six weeks but again, price. If you want it tomorrow there are better places. A