Sidewayskiwi
OK internet sales 
2-4s 40amp simonk ESC brand new two flights on new RCP F18 V4 on 3s great flights
First flight on 4s 60sec poof smoke hard landing nose and wing damage 
Obviously not a 2-4s 40 amp ESC
3s 30 amp ESC smokes up on takeoff first flight FT Vector
Obviously not a 30amp 
Then the most left field fault I've seen 
Earth came out of connector crimp and plane nosed in from 20 ft
So out of 4 maidens 3 bit the dirt 
Two repairable one borderline junk 
Gremlins won today
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Wildthing
That sucks
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solentlife
I think we have all had those days ..... and what makes it worse : Once we have a crash or two - little voice says - Go Home .... save all for another day ... but do we ? No we fling another model in the air and SMACK !
I'll fly anything if I can launch it ! Youtube : solentlifeuk
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e3_Scott
OK internet sales 
2-4s 40amp simonk ESC brand new two flights on new RCP F18 V4 on 3s great flights
First flight on 4s 60sec poof smoke hard landing nose and wing damage 
Obviously not a 2-4s 40 amp ESC
3s 30 amp ESC smokes up on takeoff first flight FT Vector
Obviously not a 30amp 
Then the most left field fault I've seen 
Earth came out of connector crimp and plane nosed in from 20 ft
So out of 4 maidens 3 bit the dirt 
Two repairable one borderline junk 
Gremlins won today


Sorry about your luck.

What size motors and props were you running in these planes?  Any idea how many amps your setups were pulling? Did anything you read on these ESCs give you the indication of their burst rating?  

Do you have a link to the ESCs you purchased?

Cheers,

Scott
Park Jet noise...the "other" sound of freedom😎
#ParkJetnoise #ParkJetpilot
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Sidewayskiwi
e3_Scott wrote:


Sorry about your luck.

What size motors and props were you running in these planes?  Any idea how many amps your setups were pulling? Did anything you read on these ESCs give you the indication of their burst rating?  

Do you have a link to the ESCs you purchased?

Cheers,

Scott

all the ubiquitious 2826 2200 
kv 6042 gemfanflash motor prop set ups
all ebay purchases
Simonk esc had 40amp on it but didnt have the 2-4s sticker other ive brought had (flew fine on 3s but went poof 60sec on 4s)
the yellow cheapie had no rating but as sold as a 30amp but i noticed heat sink is same size as my known 20 amp esc's i find heat sink size is a good indication of ratings 
all were pulling mid 20's on 3s 
and mid 30's on 4s on the 40 amp esc 
got a simonk esc 40amp with 2826 6x4 prop in my HK F35 profile its been on 4s for @2 years no issues tons of flights 
so its a case of 
"caveat emptor" let the buyer beware 
anything out there that can test esc constant ratings ?
regards
Robf
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Sidewayskiwi
solentlife wrote:
I think we have all had those days ..... and what makes it worse : Once we have a crash or two - little voice says - Go Home .... save all for another day ... but do we ? No we fling another model in the air and SMACK !

yep exactly what happened lol
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Wildthing

all the ubiquitious 2826 2200 
kv 6042 gemfanflash motor prop set ups
all ebay purchases
Simonk esc had 40amp on it but didnt have the 2-4s sticker other ive brought had (flew fine on 3s but went poof 60sec on 4s)
the yellow cheapie had no rating but as sold as a 30amp but i noticed heat sink is same size as my known 20 amp esc's i find heat sink size is a good indication of ratings 
all were pulling mid 20's on 3s 
and mid 30's on 4s on the 40 amp esc 
got a simonk esc 40amp with 2826 6x4 prop in my HK F35 profile its been on 4s for @2 years no issues tons of flights 
so its a case of 
"caveat emptor" let the buyer beware 
anything out there that can test esc constant ratings ?
regards
Robf


When you plugged in the battery and when it initialized did it beep 4 times telling you it was 4S ? 
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solentlife
Surprised at the amps .... 

I run the 2826 2200kv in many of my models and on 3S with 6x4 (Hobby King APC style) ...... I will Wattmeter mine again ... as I had 18A max before ... 
I'll fly anything if I can launch it ! Youtube : solentlifeuk
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e3_Scott

all the ubiquitious 2826 2200 
kv 6042 gemfanflash motor prop set ups
all ebay purchases
Simonk esc had 40amp on it but didnt have the 2-4s sticker other ive brought had (flew fine on 3s but went poof 60sec on 4s)
the yellow cheapie had no rating but as sold as a 30amp but i noticed heat sink is same size as my known 20 amp esc's i find heat sink size is a good indication of ratings 
all were pulling mid 20's on 3s 
and mid 30's on 4s on the 40 amp esc 
got a simonk esc 40amp with 2826 6x4 prop in my HK F35 profile its been on 4s for @2 years no issues tons of flights 
so its a case of 
"caveat emptor" let the buyer beware 
anything out there that can test esc constant ratings ?
regards
Robf


I'm surprised you didn't cook the motor as well if you were spinning a 6042 prop on 4S.  In my testing, on 3S, that prop drew 29.5A, so if you theoretically increase that by 33% jumping to 4S, you are pulling close to 40A and that motor is rated for 34A.  I have run it close to or slightly over 34A in the past, but the motor runs very hot and probably wouldn't last long.

Not sure what you mean by "esc constant ratings".  My experience is the cheaper an ESC or battery is, normally the more inflated the ratings/labellings.  A wattmeter will tell you what amps the motor/prop combo is trying to pull, but ESCs vary greatly in allowing motors to perform at their best.  If there are very few specs or reviews available on a piece of equipment, unfortunately the higher the risk in using it. 

Cheers,

Scott
Park Jet noise...the "other" sound of freedom😎
#ParkJetnoise #ParkJetpilot
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solentlife
solentlife wrote:
Surprised at the amps .... 

I run the 2826 2200kv in many of my models and on 3S with 6x4 (Hobby King APC style) ...... I will Wattmeter mine again ... as I had 18A max before ... 


Just tested my 2826 2200kv fitted the the Profile F16 .... brand new motor with 6x4 APC style .... on a partial depleted 3S - it drew 19.8A ... (I find that full charge amps are only there for a short period and I prefer to see what real numbers could be given a longer flight). This tells me that I will for a very short time draw about 21A when battery full ......
I'll fly anything if I can launch it ! Youtube : solentlifeuk
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Sidewayskiwi
Wildthing wrote:


When you plugged in the battery and when it initialized did it beep 4 times telling you it was 4S ? 

Ooo good point I don't recall
I have simonk ESC's that only beep once regardless of cell count 
Theyve been running 4s for a couple of years
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Sidewayskiwi
e3_Scott wrote:


I'm surprised you didn't cook the motor as well if you were spinning a 6042 prop on 4S.  In my testing, on 3S, that prop drew 29.5A, so if you theoretically increase that by 33% jumping to 4S, you are pulling close to 40A and that motor is rated for 34A.  I have run it close to or slightly over 34A in the past, but the motor runs very hot and probably wouldn't last long.

Not sure what you mean by "esc constant ratings".  My experience is the cheaper an ESC or battery is, normally the more inflated the ratings/labellings.  A wattmeter will tell you what amps the motor/prop combo is trying to pull, but ESCs vary greatly in allowing motors to perform at their best.  If there are very few specs or reviews available on a piece of equipment, unfortunately the higher the risk in using it. 

Cheers,

Scott

hi Scott no dropped prop back to 6x3 which ive run with 4s for awhile now 
ok constant ratings is the amperage an esc can tolerate with no issues (from my experience usually 10amps below the max rating)
Think of the burst rating as the "ultimate strength" of the esc but it wont last long  and the constant rating is the happy motoring forever after rating 
A burst rating is a balls to the wall short time that an esc can hold without the smoke escaping 
eg hk 60amp esc has a burst rating of 80 amps 20 sec but 60 amps constant all day long
the cheaper escs seem to be marketing the max or burst rating as the constant rating (either intentionally or not deceiving the buyer)
ive found theres a heatsink area correlation between the amperage rating and the heatsink size (obviously) and the bunch of escs (30amp esc ) i brought off ebay recently the heat sink size matches the that of an 18 to 20 amp this is been proven by my esc failure when fitted to a plane with a draw of mid 20 amp region 
Buying online used to be good  but last 5 purchases on aliexpress all no show (been refunded for them by aliexpress) has shaken the faith somewhat 
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solentlife
ESC ratings ..... 

I loved the old Hobby King 'square' basic 50A ESC's .... OK - they had a linear 2A BEC ... but they were compact and reliable as long as you kept them for 30A+ use.
The Red Brick ESC's ... and Blue Hobby King - I have often had them pushed near their max ratings and they have survived .... unlike certain branded ESC's that cost more ! Example : The F16 profile I have just completed has ~21A at max full charged 3S on the 2200kv / 6x4 .... the 20A Blue Hobby King ESC ran fine and only a slight increase in temperature after sustained test run. (I was in a rush and couldn't find a higher rated till later ... I have changed to my last 50A HK ESC I have !!).

I used to pay that bit more for Plush ESC's but once I used the YEP ESC's - that was end of Plush ESC's for me ... Plush I have reason to believe they are Hobby Wing rebranded ... 
I'll fly anything if I can launch it ! Youtube : solentlifeuk
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solentlife
Just been looking at various ESC's and one caughyt my eye .... Aerostar with WiFi programability ... 
I'll fly anything if I can launch it ! Youtube : solentlifeuk
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