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EDF Problems in SR71 Build.
- Walrus
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07 Jul 2012 22:07 #151
by Walrus
Replied by Walrus on topic Re: EDF Problems in SR71 Build.
The smaller the number the heaver the wire. 8 gauge is thicker thn 10. Originaly wire was made by pulling it thru a die the more pulls the thinner the wire. The number reflected in Gauge refers to the number of pulls thru a die.THE BLACKBIRD wrote: I need to order some heavier wire for the SR i think the stuff i have put in there is not up to the job but the biggest can find is 10 gauge ??
How do you measure the wire
what is 10 gauge ? will it carry the sort of power im putting through it, keeping in mind that the lipo's will be about 15" from the esc's, from leasons already learned it is very high power.
Your thoughts gentlemen please
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- Eric
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07 Jul 2012 22:51 #152
by Eric
if you are calm and collected when all about you are going berserk - you've missed something important!
Replied by Eric on topic Re: EDF Problems in SR71 Build.
BB, try a ham radio shop, if you can find one out there. They are likely to have really heavy duty cables.
Or - have a google for a shop called Rocket Radio, or one called Truck King, here in the UK, they sell heavy cable by the metre.
There was a guy on EBAY selling the stuff, too, I'll see if I can find a link, a bit later.
Or - have a google for a shop called Rocket Radio, or one called Truck King, here in the UK, they sell heavy cable by the metre.
There was a guy on EBAY selling the stuff, too, I'll see if I can find a link, a bit later.
if you are calm and collected when all about you are going berserk - you've missed something important!
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- THE BLACKBIRD
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08 Jul 2012 15:09 - 08 Jul 2012 15:10 #153
by THE BLACKBIRD
Replied by THE BLACKBIRD on topic Re: EDF Problems in SR71 Build.
I was talking to a hellicopter flyer this morning at the field and he said Castle Phoenix esc's were known for the fact that they burst into flames!!!! been a big issue with them, 
Wish i had known that before i parted with my £500 for the two. 
Aparently they are known in the helli world as CASTLE CREMATIONS
Wish i had known that before i parted with my £500 for the two.
Aparently they are known in the helli world as CASTLE CREMATIONS
Last edit: 08 Jul 2012 15:10 by THE BLACKBIRD.
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- Garry Pollard
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08 Jul 2012 15:12 #154
by Garry Pollard
Replied by Garry Pollard on topic Re: EDF Problems in SR71 Build.
Well thats news you DIDNT want BB.
Garry
Garry
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08 Jul 2012 20:47 #155
by Eric
if you are calm and collected when all about you are going berserk - you've missed something important!
Replied by Eric on topic Re: EDF Problems in SR71 Build.
Flaming hell!
if you are calm and collected when all about you are going berserk - you've missed something important!
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- THE BLACKBIRD
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10 Jul 2012 01:15 #156
by THE BLACKBIRD
Replied by THE BLACKBIRD on topic Re: EDF Problems in SR71 Build.
Ran a motor in the SR today everything was ok, i noticed the wire on the lipo's 6s 5000ah 65 c was 10 gauge, i am connecting two of these together to make 12s and the wire length from lipo to esc is 15" so i think i need 8 gauge wire for this, it must be 12 gauge i used today for the run.
But finding 8 gauge it is difficult, none here thats for sure .
But finding 8 gauge it is difficult, none here thats for sure .
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10 Jul 2012 01:34 #157
by blue123
Replied by blue123 on topic Re: EDF Problems in SR71 Build.
E BAY
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- Quorneng
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10 Jul 2012 05:17 #158
by Quorneng
Replied by Quorneng on topic Re: EDF Problems in SR71 Build.
If the wire from the 6s is 10 gauge and is capable of handling 35C maximum current then putting two batteries in series to make a 12S makes no difference. The voltage goes up but the maximum current each battery can deliver remains the same.
The test is to check if the wire gets unduly warm. If it does then its the 15" length that is the issue not the 12S.
You can always 'double up' wires rather than replace with bigger.
The test is to check if the wire gets unduly warm. If it does then its the 15" length that is the issue not the 12S.
You can always 'double up' wires rather than replace with bigger.
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- The Beard
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11 Jul 2012 07:39 - 11 Jul 2012 14:12 #159
by The Beard
Replied by The Beard on topic Re: EDF Problems in SR71 Build.
I know Timbo an electrics genius has a soldered joint melt on a maiden and he lost the model ,so make sure everything calculates correctly before hand,youve had enough aggro with this one as it is.
Last edit: 11 Jul 2012 14:12 by Garry Pollard.
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12 Jul 2012 18:57 - 12 Jul 2012 18:57 #160
by Eric
if you are calm and collected when all about you are going berserk - you've missed something important!
Replied by Eric on topic Re: EDF Problems in SR71 Build.
Found some 8swg silicon wire for you, BB. Have a look here -
Ebay Item number: 230802939797
Loads of other stuff useful to us, too, from funny size nimh, led's, chargers, button cells for your calculator or watch etc. Have a look in his on-line shop.
Ebay Item number: 230802939797
Loads of other stuff useful to us, too, from funny size nimh, led's, chargers, button cells for your calculator or watch etc. Have a look in his on-line shop.
if you are calm and collected when all about you are going berserk - you've missed something important!
Last edit: 12 Jul 2012 18:57 by Eric. Reason: typo
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- THE BLACKBIRD
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16 Jul 2012 17:45 #161
by THE BLACKBIRD
Replied by THE BLACKBIRD on topic Re: EDF Problems in SR71 Build.
Took the SR for some ground trials yesterday it went well but while it was running around a thought crossed my mine that with the air intakes on the underside of the engine nacils and with so much air being sucked into the intake it might suck in some debrie into the fans and bang that would be the end of the fan and motor, but if i cover the inlet it would restrict the air flow ???
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- Garry Pollard
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16 Jul 2012 18:40 #162
by Garry Pollard
Replied by Garry Pollard on topic Re: EDF Problems in SR71 Build.
Certainly a difficult one BB, but obviously needs sorting before more damage is done. Hope you get it sorted. But how is a different matter.
Garry
Garry
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- Grumpy42
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16 Jul 2012 19:28 #163
by Grumpy42
Replied by Grumpy42 on topic Re: EDF Problems in SR71 Build.
Ummm - it's a problem alright - if you put in a fine mesh to stop the small stuff that can do the most damage you are going to restrict the airflow more. On the other hand if you use a courser mesh you don't restrict the airflow as much but you only catch the big bits which are fewer and further between on a salt flat and so do less damage. The old story - damned if you do - damned if you don't. I agree with Garry - no easy solution.
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21 Jul 2012 11:09 #164
by THE BLACKBIRD
Replied by THE BLACKBIRD on topic Re: EDF Problems in SR71 Build.
I have been emailing Fastlad Performences about my Phoenix esc but im not getting any responce from them.
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23 Jul 2012 21:50 #165
by THE BLACKBIRD
Replied by THE BLACKBIRD on topic Re: EDF Problems in SR71 Build.
I have just had a email from Andy at Fastlad Performances they are going to send me a new esc when stocks come in next week and it's F.O.C
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