BRUTUS MK 11

[Paul TParticipant @pault84577]

Captain Bob

I would love to cut out some vinyl for you but my machine is back with the manufacturer after it decided to rip everything. It looks as though the depth of cut function is knackered and as throwing it against a wall didn't fix it so the supplier can sort it out.

Sorry old friend but if are stuck then can get them from Amazon link

Paul

[Bob Abell 2Participant @bobabell2]

OK Paul

Not a problem, never thought of Amazon

Thanks my mate

Bob

[Bob Abell 2Participant @bobabell2]

At last, Brutus 2 has got her feet wet

Had a quick visit to the lake

No other club members present, probably due to the Corvid restrictions?

I noticed that one prop was more powerful going backwards than forwards!

Looking at the ESC instructions, it says that with the motor going forward, 50 amps are available

Going backwards, only 20 amps are available

Also, there are no setting up buttons to fiddle with!

The ESC`s are Brushed Marine ESC-50 with reverse

I assume that the hand of the props need to be looked into, to match the going forward and reverse feature?

Lady Joyce took the photographs, as there was nobody else around

A few photos of the non event

Bob

[ashley needhamParticipant @ashleyneedham69188]

Bob. That looks very good mate, yes indeed. Did you get a good speed out of it?? 😇

Although in practice it usually makes no difference, just sometimes swapping the prop rotation (say from inwards turning to outwards turning) can have an effect.

Also you could re-check that the locknut adjustment on the shafts is even, ie, ne isn’t tighter than the other.

Ashley

[Bob Abell 2Participant @bobabell2]

The instructions for the ECP say that going Forward, it has 50 amps and going in reverse, it has 20 amps

How can I tell which is forward and reverse?

Bob

[ashley needhamParticipant @ashleyneedham69188]

Easy Bob. It should be apparent as to what’s the 50A way and what’s the 20A direction by simply using full throttle either way.

On my Fantome which has a similar esc….ie only 25% going backwards it is very obvious which way is which, even accounting for the props being in reverse one way.

Ashley

[Bob Abell 2Participant @bobabell2]

The instructions also say that for 5 seconds Max, the ESC gives out 70 amps!

I assume this feature is automatic on start up?

Having reversed the red and blue wires on each motor, they still run faster in reverse?

Any comments, chaps please?

Come in Paul Thomason

Bob

[ashley needhamParticipant @ashleyneedham69188]

I think a lot of esc will deliver more current than they are rated for, for a few seconds…I don’t think it a special feature as such.

All things being equal, I find that reverse usually gives a few more revs as the blades are not stwisted to bite properly going in reverse.

remind me what motors you have and what size prop please Bob. (And battery type/voltage)

just possibly the motors are struggling going forwards, so as per the above point, there is a bigger difference in reverse as the motors are more able to turn the props backwards?

Ashley

[Bob Abell 2Participant @bobabell2]

Thanks Ashley

Just been in contact with Howes and nobody has asked this question before.

The motors are Two x MFA 850`s and the props are 50 mm dia x very fine helix angle

The batteries are 4000mAh, 7,2 volts NiMH

Over to you, Mr Starter

Bob

PS Please send a photo of your Dance Band if available please

[Bob Abell 2Participant @bobabell2]

Hi Ashley

How do you like my snazzy charger set up?

Bob

[Paul TParticipant @pault84577]

Good Morning Captain Bob

Nice to see the boat in its natural environment and it looks very impressive against the black and silver water, Lady Joyce is a very skilled photographer.

Regarding your motor problem, how many battery packs are you using?

it might help if you took some photos of your setup

Paul

[Bob Abell 2Participant @bobabell2]

OK Paul….10 – 4

Hang Six

Spanner

[ashley needhamParticipant @ashleyneedham69188]

Like the charging board, and I keep on thinking it is something I could do with, and have all three chargers ready to go rather than untangling them constantly!

The motors need to connected so that they drive forward with the stick forward, then connections (and possibly props) reversed so they still drive forward when the stick is reversed if that makes sense .

this means that you can have to goes on the lake, going forward using the throttle pushed forward, then a second test still going forward, but using the stick pulled back in reverse. Then you can see the difference in the forward speed effectively using both the forward Andre erase settings on the esc.

i know that’s a lot of forwards and backwards but not sure I can make it any simpler.

OR…. just had a thought, try a wattmeter…..there should be a big difference in the forwards/reverse readings?.

Look out a picture of the band later!

Ashley

[Bob Abell 2Participant @bobabell2]

Thanks Ashley

I can do all that in the bath

Will keep you informed

Here are the photo`s that Paul requested

Dive in Mates

Bob

[ashley needhamParticipant @ashleyneedham69188]

If that’s the j perkins type 50 A esc, I had no problems….set the transmitter throttle to “normal” and turn it on. I had full throttle forwards and low power reverse straight away .

Ashley

[Bob Abell 2Participant @bobabell2]

Hello Ashley, it is a Perkins Marine ESC-50

If you reversed the red and blue leads to the motor. would the motor run the other way?

Bob

[john jones 23Participant @johnjones23]

I think I am right saying switching red and blue wires would reverse the motor,but not the sense of the esc.Looks like the two ecs are connected to two different rx channels( tank or mixed ?.) I suggest reversing the problem channel at the tx.If this helps great,if not sorry for misleading you!

John

[Bob Abell 2Participant @bobabell2]

Many thanks John for your contribution

The chappie at Howes suggest that option, but don`t really fancy having Tank Steering where the controls are reversed

I feel sure there is a simple solution?

Bob

[ashley needhamParticipant @ashleyneedham69188]

Bob. Do you have a "Y" lead so the steering socket on the receiver controls both esc at the same time?

Ashley

[john jones 23Participant @johnjones23]

Just realised, I said tank ,what I really meant was are the esc's mixed to use one channel or do you have the throttles on separate sticks?

My thinking was that the channel operating the problem esc was reversed compared to the other one.

John

[Bob Abell 2Participant @bobabell2]

Ashley

Don't have a Y lead, Imprefer twin stick steering anyway

John

The Esc's are not mixed……..Don't fancy that either

I have noticed that the prop shaft are quite tight for some reason

Think this requires investigation right away

Bob

[Paul TParticipant @pault84577]

Captain Bob

As you are using twin stick for motor control have you checked the settings on your transmitter?

Paul

[Bob Abell 2Participant @bobabell2]

Hi Paul, I am using two sticks to control the motors

What settings are you referring to?

This new to me

Bob

[ashley needhamParticipant @ashleyneedham69188]

Bob, if you are using two sticks, one per motor, what controls the rudder?

Ashley

[Bob Abell 2Participant @bobabell2]

Good question, Ash

Right and left vertical sticks control the motors

RH stick controls the Rudder, left and right

What did Paul mean when he mentioned the settings on the tranny?

Bob

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