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Model Forum / Radio Controlled / Air Models / August 2007Crimp connectors for electric flight
Are there standard crimp connectors for electric flight? A friend uses 10Amp car connectors - but I have found them difficult to get. Halfords have 5 Amp and 15 Amp - but not 10 Amp. I want to standardise on something that is fairly standard in the modelling world. What do most people use?  SignatureChris > Are there standard crimp connectors for electric flight? > [quoted text clipped - 4 lines] > I want to standardise on something that is fairly standard in the > modelling world. What do most people use? why do you use crimps there are much better alternatives even soldering and heat shrink is so much better(if done correctly), which is what I would use for a semi permanent connection or if you need to remove items then 2mm 3mm or 4mm gold connectors >> Are there standard crimp connectors for electric flight? >> A friend uses 10Amp car connectors - but I have found them difficult >>to get. >> Halfords have 5 Amp and 15 Amp - but not 10 Amp. >> I want to standardise on something that is fairly standard in the >>modelling world. What do most people use? >why do you use crimps there are much better alternatives even soldering >and heat shrink is so much better(if done correctly), which is what I >would use for a semi permanent connection or if you need to remove >items then 2mm 3mm or 4mm gold connectors The engineering consensus now seems to be that crimping is more reliable than soldering. Soldering is said to suffer from brittleness. Crimping is used in aerospace - and I quote: "They could afford the solder!" SignatureChris >>> Are there standard crimp connectors for electric flight? >>> A friend uses 10Amp car connectors - but I have found them difficult [quoted text clipped - 12 lines] > Crimping is used in aerospace - and I quote: "They could afford the > solder!" but the aerospace industry does not use halfords crimps?? :-) not had one failure in any of my joints yet but quite a few down to brain errors ;-) >>>> Are there standard crimp connectors for electric flight? >>>> A friend uses 10Amp car connectors - but I have found them >>>>difficult to get. >>>> Halfords have 5 Amp and 15 Amp - but not 10 Amp. >>>> I want to standardise on something that is fairly standard in the >>>>modelling world. What do most people use? >>> why do you use crimps there are much better alternatives even >>>soldering and heat shrink is so much better(if done correctly), which >>>what I would use for a semi permanent connection or if you need to >>>remove items then 2mm 3mm or 4mm gold connectors >> The engineering consensus now seems to be that crimping is more >>reliable than soldering. Soldering is said to suffer from brittleness. >> Crimping is used in aerospace - and I quote: "They could afford the >>solder!" >but the aerospace industry does not use halfords crimps?? :-) >not had one failure in any of my joints yet but quite a few down to >brain errors ;-) Point taken Kevin. I am getting back into modelling after a long break - and starting electric for the first time - and I want to be as standard as possible from the standpoint of sharing batteries with others etc. The friend that uses the 10 Amp crimps is very experienced - and so it may pay me just to go for compatibility with him. SignatureChris >>>>> Are there standard crimp connectors for electric flight? >>>>> A friend uses 10Amp car connectors - but I have found them [quoted text clipped - 22 lines] > others etc. The friend that uses the 10 Amp crimps is very experienced > - and so it may pay me just to go for compatibility with him. but how can you share a battery thats crimped??? or have we got our wires crossed or do you mean something like 10amp crimped spades?? http://www.kampenwagen.co.uk/Crimping.htm as I dont think these are designed for repeated insertions >>>>>> Are there standard crimp connectors for electric flight? >>>>>> A friend uses 10Amp car connectors - but I have found them >>>>>>difficult to get. >>>>>> Halfords have 5 Amp and 15 Amp - but not 10 Amp. >>>>>> I want to standardise on something that is fairly standard in >>>>>>modelling world. What do most people use? >>>>> why do you use crimps there are much better alternatives even >>>>>soldering and heat shrink is so much better(if done correctly), >>>>>which what I would use for a semi permanent connection or if you >>>>>need to remove items then 2mm 3mm or 4mm gold connectors >>>> The engineering consensus now seems to be that crimping is more >>>>reliable than soldering. Soldering is said to suffer from brittleness. >>>> Crimping is used in aerospace - and I quote: "They could afford the >>>>solder!" >>> but the aerospace industry does not use halfords crimps?? :-) >>> not had one failure in any of my joints yet but quite a few down to >>>brain errors ;-) >> Point taken Kevin. I am getting back into modelling after a long >>break - and starting electric for the first time - and I want to be >>as standard as possible from the standpoint of sharing batteries with >>others etc. The friend that uses the 10 Amp crimps is very >>experienced - and so it may pay me just to go for compatibility with him. >but how can you share a battery thats crimped??? or have we got our >wires crossed or do you mean something like 10amp crimped spades?? >http://www.kampenwagen.co.uk/Crimping.htm >as I dont think these are designed for repeated insertions The ones I'm talking about are called "bullet connectors". SignatureChris >>>>>>> Are there standard crimp connectors for electric flight? >>>>>>> A friend uses 10Amp car connectors - but I have found them [quoted text clipped - 31 lines] > > The ones I'm talking about are called "bullet connectors". Ah but my comment still stands these are not suitable IMHO for repeated make and break connection as in a battery connection >> have we got our >>> wires crossed or do you mean something like 10amp crimped spades?? [quoted text clipped - 4 lines] > Ah but my comment still stands these are not suitable IMHO for repeated > make and break connection as in a battery connection gold bullets are eminenmtly suitable. Except for crimping. >>>>>>>> Are there standard crimp connectors for electric flight? >>>>>>>> A friend uses 10Amp car connectors - but I have found them >>>>>>>>difficult to get. >>>>>>>> Halfords have 5 Amp and 15 Amp - but not 10 Amp. >>>>>>>> I want to standardise on something that is fairly standard in >>>>>>>>modelling world. What do most people use? >>>>>>> why do you use crimps there are much better alternatives even >>>>>>>soldering and heat shrink is so much better(if done correctly), >>>>>>>which what I would use for a semi permanent connection or if you >>>>>>>need to remove items then 2mm 3mm or 4mm gold connectors >>>>>> The engineering consensus now seems to be that crimping is more >>>>>>reliable than soldering. Soldering is said to suffer from >>>>>>brittleness. >>>>>> Crimping is used in aerospace - and I quote: "They could afford >>>>>>solder!" >>>>> but the aerospace industry does not use halfords crimps?? :-) >>>>> not had one failure in any of my joints yet but quite a few down >>>>>to brain errors ;-) >>>> Point taken Kevin. I am getting back into modelling after a long >>>>break - and starting electric for the first time - and I want to be >>>>as standard as possible from the standpoint of sharing batteries >>>>with others etc. The friend that uses the 10 Amp crimps is very >>>>experienced - and so it may pay me just to go for compatibility with him. >>> but how can you share a battery thats crimped??? or have we got our >>>wires crossed or do you mean something like 10amp crimped spades?? >>> http://www.kampenwagen.co.uk/Crimping.htm >>> as I dont think these are designed for repeated insertions >> The ones I'm talking about are called "bullet connectors". >Ah but my comment still stands these are not suitable IMHO for repeated >make and break connection as in a battery connection What are your reasons? What do you think might happen? The friend who does use them has done so for many years without incident and he is an experienced electronics engineer. SignatureChris >>>>>>>>> Are there standard crimp connectors for electric flight? >>>>>>>>> A friend uses 10Amp car connectors - but I have found them [quoted text clipped - 39 lines] > The friend who does use them has done so for many years without incident > and he is an experienced electronics engineer. I think if you check the specifications for them repeated insertions/withdrawals are not recommended but I could be wrong I just find those stlye of conectors lossen ever time you re-use them and the cheapo Halfords ones are going to be a higher resistance than a gold plated ones similar to these <http://cgi.ebay.co.uk/4mm-gold-plug-socket-2-pairs-UK-seller_W0QQitemZ3001415267 23QQihZ020QQcategoryZ34056QQssPageNameZWDVWQQrdZ1QQcmdZViewItem> I would avoid any tin plated connectors full stop Or go for something similar these <http://cgi.ebay.co.uk/10-pairs-of-T-plug-Connector-RC-Remote-battery-Deans_W0QQi temZ200144597984QQihZ010QQcategoryZ34056QQssPageNameZWDVWQQrdZ1QQcmdZViewItem> >>>>>>>>>> Are there standard crimp connectors for electric flight? >>>>>>>>>> A friend uses 10Amp car connectors - but I have found them >>>>>>>>>>difficult to get. >>>>>>>>>> Halfords have 5 Amp and 15 Amp - but not 10 Amp. >>>>>>>>>> I want to standardise on something that is fairly standard >>>>>>>>>>modelling world. What do most people use? >>>>>>>>> why do you use crimps there are much better alternatives even >>>>>>>>>soldering and heat shrink is so much better(if done correctly), >>>>>>>>>which what I would use for a semi permanent connection or if >>>>>>>>>you need to remove items then 2mm 3mm or 4mm gold connectors >>>>>>>> The engineering consensus now seems to be that crimping is >>>>>>>>more reliable than soldering. Soldering is said to suffer >>>>>>>>from brittleness. >>>>>>>> Crimping is used in aerospace - and I quote: "They could afford >>>>>>>>solder!" >>>>>>> but the aerospace industry does not use halfords crimps?? :-) >>>>>>> not had one failure in any of my joints yet but quite a few down >>>>>>>brain errors ;-) >>>>>> Point taken Kevin. I am getting back into modelling after a >>>>>>break - and starting electric for the first time - and I want to >>>>>>be as standard as possible from the standpoint of sharing >>>>>>batteries with others etc. The friend that uses the 10 Amp >>>>>>crimps is very experienced - and so it may pay me just to go for >>>>>>him. >>>>> but how can you share a battery thats crimped??? or have we got >>>>>wires crossed or do you mean something like 10amp crimped spades?? >>>>> http://www.kampenwagen.co.uk/Crimping.htm >>>>> as I dont think these are designed for repeated insertions >>>> The ones I'm talking about are called "bullet connectors". >>> Ah but my comment still stands these are not suitable IMHO for >>>repeated make and break connection as in a battery connection >> What are your reasons? >> What do you think might happen? >> The friend who does use them has done so for many years without >>incident and he is an experienced electronics engineer. >I think if you check the specifications for them repeated >insertions/withdrawals are not recommended but I could be wrong I just [quoted text clipped - 8 lines] >ans_W0QQitemZ200144597984QQihZ010QQcategoryZ34056QQssPageNameZWDVWQQrdZ1 >QQcmdZViewItem> Thanks for the links. I hadn't come across T-Plug connectors. They look interesting. I have discussed your comments with the aforementioned friend, who says that he does use soldered connections for everything except the battery. For instance, he permanently solders the motor to its speed controller, not using connectors at all. He uses the crimped bullet connectors solely for battery connections which have to be repeatedly disconnected. BTW he didn't get his from Halfords; they probably came from work. SignatureChris >>> Are there standard crimp connectors for electric flight? >>> A friend uses 10Amp car connectors - but I have found them difficult [quoted text clipped - 12 lines] > Crimping is used in aerospace - and I quote: "They could afford the > solder!" It wasn't once. Anyway most people use gold bullets Deans Astro gold zero loss polrized or Tamiyas. Mostly the model is broken long before the solder/heatshrink fractures ;-) >The engineering consensus now seems to be that crimping is more reliable >than soldering. Soldering is said to suffer from brittleness. >Crimping is used in aerospace - and I quote: "They could afford the >solder!" Sometimes I will crimp, then solder... :) David Crimping then soldering probably results in a less reliable connection, depending on the application. Solder will 'wick' up the strands of the cable making it solid. This can lead to breakage if it is flexed. Just crimping retains the flexibility of the stranded cable. Peter >>The engineering consensus now seems to be that crimping is more reliable >>than soldering. Soldering is said to suffer from brittleness. [quoted text clipped - 4 lines] > > David > Crimping then soldering probably results in a less reliable connection, > depending on the application. Solder will 'wick' up the strands of the > cable making it solid. This can lead to breakage if it is flexed. Just > crimping retains the flexibility of the stranded cable. > > Peter The trouble with crimping is that whilst its highly suitable for automation, where you can relaibly cut, strip and crimp the same wire and the same connector, with a precise tool, its not as good when you are doing one offs. Crimps tend to fail via corrosion, soldered with brittle fractore. You pays yer money.. Crimps are used in production because they are cheap. Because they are, with automatic machines, very fast. They are not necessarily better than solder. They are however GOOD ENOUGH. If you use a good heat shrink to support the wire solder works very reliably. Needless to say in production work this is also very time consuming and expensive. Crimps are used almost exclusively in the aviation world and have been for some time. Decent crimps (not the three colour automotive type) are crimped with precision termination tools that are calibrated on a regular basis to help ensure the quality of the joint. The crimps also hold the insulation in a lot of cases which makes for a flexible joint. I would have no hesitation in using them in model use but I doubt they would be readily available for high current (70 amps upwards) use. >> Crimping then soldering probably results in a less reliable connection, >> depending on the application. Solder will 'wick' up the strands of the [quoted text clipped - 17 lines] > reliably. Needless to say in production work this is also very time > consuming and expensive. > Crimps are used almost exclusively in the aviation world and have been for > some time. Decent crimps (not the three colour automotive type) are crimped [quoted text clipped - 4 lines] > I would have no hesitation in using them in model use but I doubt they would > be readily available for high current (70 amps upwards) use. Precisely. Under carefully controlled and repeatable conditions in a non corrosive environment, its a very cheap and reliable way to do things. However model makers at home do not in general have the above conditions. Crimps are regularly used in automotive work on starter motor wires: up to 500A or so. Its no big deal. I have myself taken such apart with a brisk tug when corrosion has set in, and soldered them back together ;-) >>> Crimping then soldering probably results in a less reliable connection, >>> depending on the application. Solder will 'wick' up the strands of the [quoted text clipped - 17 lines] >> reliably. Needless to say in production work this is also very time >> consuming and expensive. |
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