boatman's 1/72 HMS Tiger C20 build
				
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G/M ALL well regardin them big fuses well i spoke to the gent who sent me them fuses an yes i can return them for a refund but he told me that 40 amp fuses is the highest they go in the standard size so no 50 amp or more so even if i fit new motors an if it still blows the 40 amp fuses due to her wheight on propload im stuck unless i do away with fuses altogether an just hope that the eletrics will take this very high currant well the ESC X 2 I KNOW SHOULD as they are rated at 320 amp so they should be ok but the wirein even though its very heavy duty an the motors may have probs SO just got to hope she dont catch fire oh dear but will see an hope for the bestAn hi John an Andy well ive found the four yr journey went very quick indeed as to me it doesnt seem that long ago since i was cuttin out her keel an hull frames an yes i hope to get all them bugs sorted out but its a job to know which motors to get as they will have to be fairly powerfull to propel her on the pond esp if there is a strong wind an then i maybe back to blowin fuses so instead of 40 amp fuses i'll have to get some 50 amp fuses an hope it dont catch fire which will be right up J/R 's street lol :rolling:
:smiling2:  so really its all gonna be trail an error mostly error i think boy ive never had this kind of trouble before as i could then buy the groupner 600 motors easy but now they have stopped makin them i will have to take pot luck on some new motors an in this case it may be that the motor shaft wont line up with the prop shaft then more probs
but will see what happens
cheers to you both
chrisb
chrisbComment
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	Guest
ChrisG/M ALL well regardin them big fuses well i spoke to the gent who sent me them fuses an yes i can return them for a refund but he told me that 40 amp fuses is the highest they go in the standard size so no 50 amp or more so even if i fit new motors an if it still blows the 40 amp fuses due to her wheight on propload im stuck unless i do away with fuses altogether an just hope that the eletrics will take this very high currant well the ESC X 2 I KNOW SHOULD as they are rated at 320 amp so they should be ok but the wirein even though its very heavy duty an the motors may have probs SO just got to hope she dont catch fire oh dear but will see an hope for the best
chrisb
Did you say. FIRE :nerd:Comment
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Chris, you could change the fuseholder for the larger type: https://en.wikipedia.org/wiki/Fuse_(automotive)
I'm surprised that the motors are drawing enough current to blow 40A fuses though. A typical fuse needs double its rated current for up to 5 seconds to blow.
PeteComment
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HI Pete no i dont really like the idea of doin away with the fuses so i may keep these big fuses but i need a fuse box for thes big fuses do you know where i can find a big fuse holder ? or i may just solder the wires to the blades but not keen on that ideaChris, you could change the fuseholder for the larger type: https://en.wikipedia.org/wiki/Fuse_(automotive)
I'm surprised that the motors are drawing enough current to blow 40A fuses though. A typical fuse needs double its rated current for up to 5 seconds to blow.
Pete
chrisbComment
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Would it be possible to use a fuse holder from a car!!
Maybe a trip to a local scrap yard with a selection of useful tools!! Hammer, jemmy, or something equally as destructive - but useful!!
 
 
No way would soldering fuses into the circuit!!:flushed:Comment
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HI Doug well all the car scrap yards around here are all closed up as 90% of us car drivers have fairly new cars so the scrap yards have all closed im sad to say as i use to enjoy havin a look around the scrap yards for bits of my old car an no im not goin to solder the wires on as sent for a proper maxi big fuse holder
So that will get fitted in the ship along side my normal fuse box so i will have the best of both worlds an i think i'll keep all these big fuses just in case i do need them as tiger is a very heavy model an movin her in the water must take a good bit of power an i may need to buy some bigger props but will see on that on sept warship day an cheers for your ideas
chrisbComment
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OH HELL Pete im not thinkin this morn proberly got to much sun from on the beach yesterday but ive sent for a big fuse holder off ebay an paid a couple of quid more but never mind
AN YES Pete i thought of that an no the fuse blades are bigger as i was thinkin along them lines of usein them to make my own fuse holder which would have been easy but no shot down in flames again but ive just ordered one an my idea will be to leave in the normal fuse holder an fit the new big fuse holder along side it an then fit spade connecters so i can just unclip the wires from the normal fuse box an clip the main feed wire into the big fuse holder an have the same idea on the other side to feed power through a heavy duty
Y lead to both the 320 amp ESC 'S THEN TO ALL 4 MOTORS hows that ?
chrsbComment
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I still think that the root of the problem is why the motors are drawing so much current. Are the propshafts turning freely Chris?
It must be getting pretty hot inside the hull. Do you have any way of recording the temperature? Maybe a greenhouse min/max thermometer? I sued to have a pile of little stick-on discs that change colour at a particular temperature, but they've all gone now. Something like these: https://uk.rs-online.com/web/p/tempe...labels/7799779
PeteComment
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HI Pete yes the prop shafts turn very easy so they not the probs an the big apetures in the hull sides have a back on but no top so the wind or air can blow through freely an there is a small fan nr the base of the second funnel that is running all the while suckin cool air into the hull an then a big 3 inch fan that i can work by R/C EVERY few mins so coolin should not be a problem an thank you for info on them sticks an ive been told that i am wirein up the batt wrong as i always fit the neg then the positive the off in revese is this correct ? an the 3 mm led in the gun is workin ok thank goodness an when paul looked it seems that the gunfire unit has to have about a 5 second delay before the gunfire an gun flash so my mate paul must have been lookin at it when it was in delay an also one of the probs i had up the pond was a dodgey r/c plug on the BIG RUDDER BUT GOES OK NOW AS FITTED A NEW ONE an out of the 20 plug leads i had when fitting it i had to go an pick a bad one just my luck an i also fixed the bowthruster now workin ok so all i need now is the motors then im back in bussiness an tiger can come out of drydock yayI still think that the root of the problem is why the motors are drawing so much current. Are the propshafts turning freely Chris?
It must be getting pretty hot inside the hull. Do you have any way of recording the temperature? Maybe a greenhouse min/max thermometer? I sued to have a pile of little stick-on discs that change colour at a particular temperature, but they've all gone now. Something like these: https://uk.rs-online.com/web/p/tempe...labels/7799779
Pete
chrisbComment
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