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[Pat-K]

Hi,


In my opinion Mtroniks ESC's are the very best - especially as they give full speed astern - IMHO a necessity [/size] for larger models that can go fast, however, they are becoming increasing expensive and harder to source, OK you can order then direct online but then you normally have to wait at least 10 days also I find an incresing tendency for suppliers to charge you first class post and packing and send out second class.
Personally I would prefer to going into a shop and see them on the self and say I want that that and that, but it does not seem possible these days.
Anyway onwards, as a cheaper alternative I have started using FTX FTX6557W2 they are less than half the price of a Mtroniks and rated at 60 AMP - a bit more complicated to use - there is a jumper for car or boat and if you dont move it to boat then you do not get the full astern mode.Also there is a jumper from NiMH and LiPO batteries with no mention of Lead Acid - I keep meaning to send and email to the maunfactures about settings for Lead Acid.Since I put a ESC in per shaft in order to make the model more realistic and more manoverable using MTroniks all the time - things can get expensive a FTX is less that £20 plus VAT for a 60Amp Esc.Wondered what anyones thoughts are on this subject and how many model builder still use the cheap nasty Japanese items.ThanksPat

[HMS Invisible]

Hi,


In my opinion Mtroniks ESC's are the very best - especially as they give full speed astern - IMHO a necessity for larger models that can go fast, however, they are becoming increasing expensive and harder to source, OK you can order then direct online but then you normally have to wait at least 10 days also I find an incresing tendency for suppliers to charge you first class post and packing and send out second class
Personally I would prefer to going into a shop and see them on the self and say I want that that and that, but it does not seem possible these days.
Anyway onwards, as a cheaper alternative I have started using FTXFTX6557W2 they are less than half the price of a Mtroniks and rated at 60 AMP - a bit more complicated to use - there is a jumper for car or boat and if you dont move it to boat then you do not get the full astern mode.Also there is a jumper from NiMH and LiPO batteries with no mention of Lead Acid - I keep meaning to send and email to the maunfactures about settings for Lead Acid.Since I put a ESC in per shaft in order to make the model more realistic and more manoverable using MTroniks all the time - things can get expensive a FTX is less that £20 plus VAT for a 60Amp Esc.Wondered what anyones thoughts are on this subject and how many model builder still use the cheap nasty Japanese items.

Pat, do you want a written critique of your comments or of the FTX esc from someone who has tested the FTX esc or purely speculative points on the esc from people who have not had the chance to use it?

[Pat-K]

Just points please

[HMS Invisible]

Just points please

Points about the FTX esc or other escs or counterpoint to what you wrote?

I don't know if you are just after a suggestion of an alternative esc choice based on a comparison or an open ended discussion on significant esc technical features, listed below, that includes some you didn't mention.

• battery type setting
• frequency
• minimum duty cycle
• current rating
• bec type (linear or switching)
• behaviour at low voltage
• maximum voltage
• glitch filtering or sustain

+ many more

I've already bought a large selection of Chinese manufactured escs for evaluation based on limited information  but I'd pass on the FTX one. ( oriental deception, concealment of spec, entry level spec at premium price - which I  base on sound esc design principles)

[Pat-K]

Thanks for that information - if you have eveluated a lot of esc what would be your recommendation

[roycv]

Hi I like a bit of testing and evaluation so count me in as well.
Could I throw into the mix the Bandolean tiny esc's that I use.  Although rated at 10 and 20 amps I use them for up to 4 or 5 amps.  They are very cheap and via Aliexpress or the like.

ttps://www.aliexpress.com/item/1005006112400103.html?src=google&pdp_npi=4%40dis!GBP!5.91!1.79!!!!!%40!12000035803319376!ppc!!!&src=google&albch=shopping&acnt=494-037-6276&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&gclsrc=aw.ds&&albagn=888888&&ds_e_adid=&ds_e_matchtype=&ds_e_device=c&ds_e_network=x&ds_e_product_group_id=&ds_e_product_id=en1005006112400103&ds_e_product_merchant_id=731012774&ds_e_product_country=GB&ds_e_product_language=en&ds_e_product_channel=online&ds_e_product_store_id=&ds_url_v=2&albcp=17859500389&albag=&isSmbAutoCall=false&needSmbHouyi=false&gad_source=1&gclid=Cj0KCQiAvP-6BhDyARIsAJ3uv7Y_HSmuZm5SVoIs4DDPK4TEHmEfsBsXnx0YxgaYBvli7n6j0218t3kaAo6oEALw_wcB

Hope that is right!  Alegedly up to 30 amps I have used them for at least 6 years now, never had one fail and they drive the small motors, monoperm Super, 385 etc. very well.  At £1.79 each what is not to like?  The, 4 to 8 cells and small, there is a noticeable buzzing noise from the duty cycle.  You need to start in neutral on the Tx and then advance to Fwd etc.  There is a red light to show it is on and a switch to turn off the braking and just a few grams in weigh.
Roy

[HMS Invisible]

Thanks for that information - if you have eveluated a lot of esc what would be your recommendation

Not just me. Three other Mayhem members local to me as well tried below.
You mentioned twin throttle and lead acid, which I assume is 12volt.
I assume you use 2.4 GHz.
https://www.aliexpress.com/item/1005005376657723.html
Ebay vendors charge nearly £20 delivered and you'll turn up one or two at 2 or 3 day post from UK located stock.
If you want a single esc that actually does 60 to 80 amp continuous search on Ebay for 12V-24V Brushed Motor 640A.

[NickelBelter]

The, 4 to 8 cells and small, there is a noticeable buzzing noise from the duty cycle.  You need to start in neutral on the Tx and then advance to Fwd etc.  There is a red light to show it is on and a switch to turn off the braking and just a few grams in weigh.
Roy

This is due to the frequency that the ESC 'chops' the DC voltage at, and it's not the ESC that produces it, it's vibrations in the motor can. 

[HMS Invisible]

...If you want a single esc that actually does 60 to 80 amp continuous search on Ebay for 12V-24V Brushed Motor 640A.

Finally! , I tracked down vendor data on the high power esc via Aliexpress.
I copied & pasted it on the thread about 12v-24v escs. Here
 So you see when a Chinese supplier says 640A or 320A it refers to the a very short term rating before a cutout. Not a continuous rating.
 It's not an entry level 15 amp esc with four fets in a bridge.