BRUTUS MK 11

[Bob Abell 2Participant @bobabell2]

Hi Ashley

You yourself must have built plenty of models with twin motors?

So…….Did you cut the said wire?

Bob

[Paul TParticipant @pault84577]

Bob

None of us know how you managed to wire the 4 motors in the VGC without blowing it up.

Regarding your current problem with the on/off switches, common sense tells me that the switches have been bypassed and that looking at the wiring diagram might resolve the problem but when it comes to your intriguing layouts the laws of physics don't apply.

Paul

[Bob Abell 2Participant @bobabell2]

Thank you my mate

Haven`t got a wiring diagram and I`ve tried ringing Howes Models, but no answer at the moment

NOW……..I`ve just come up with an idea and it`s a cracker!

Will send you an Email, shortly

Bob

[ashley needhamParticipant @ashleyneedham69188]

Bob. Unfortunately all the boats I have built that have twin motors only use one esc, because they are all fairly low powered.

The Titanic has three 385 motors on 35mm props on one Mtronics 15A esc no probs since build (2007) etc etc.

Your 850s demand two esc as you have fitted.

Ashley

[Bob Abell 2Participant @bobabell2]

Thank you Ashley

Just run the the system and all is well

The On / Off mystery

I have the story slightly incorrect……Sorry chaps

When both switches are ON the system operates correctly

When one switch is turned OFF…….The system still operates

With both switches OFF………The system is dead

This means the switches are not just ON/OFF switches

Bob

[Bob Abell 2Participant @bobabell2]

Chaps!…….I may have a logical explanation for the Cut Wire controversy

Have read on the net that on twin motor systems with twin batteries, that the wire in question, also known as the Earth Wire, is cut to prevent the power of two batteries leaking into the system and burning out the weakest wire and thus could cause a fire!

In my case where the wires have not been cut, the system will operate as normal, but is "an accident waiting to happen!"

Sounds reasonable to me

Bob

[Bob Abell 2Participant @bobabell2]

Paul….Email sent

Bob

[Tim CooperParticipant @timcooper90034]

Bob

In the models that I use 2 batteries I have fitted a Action P103 Parallel power board, from Component Shop. This connects the 2 batteries together and gives you one common power source. I must have 4 or 5 models with 2 batteries and a P103.

Tim

[Bob Abell 2Participant @bobabell2]

Thank You Tim

Paul Thomason has just said the same thing

I never knew these gadgets existed

Bob

[Paul TParticipant @pault84577]

Bob

Our good friend and electronic genius Dave M has been building these things for years and Action Electronics equipment has saved many expensive models from a fiery Viking ending.

I learnt my lesson many years ago when I fitted cheap ESCs into a boat only to see them burst into flames after running for 5 minutes, I didn't manage to save the model.

Ever since then I have always used Action equipment and Dave even built me a one off superheavy duty ESC / mixer.

The Action equipment has never let me down and I consider it money very well spent.

By the way since when did I qualify for being Mr Grimnasty? anybody else could get upset by this.

[Bob Abell 2Participant @bobabell2]

Don`t you go worrying there, my son………He`s not you anyway

In fact, I can`t remember who I was referring to now, but we`ll know when he does!

Was your burn`t out model a twin motor model

Bob

[Paul TParticipant @pault84577]

Yes Bob it was a twin.

It was my first Perkasa with an expensive pair of motors and two 50a speed controllers from China.

So if I'm not Mr Grimnasty then one of your forum friends is going to be very upset.

Paul

[Bob Abell 2Participant @bobabell2]

Thanks for the info about your twin motored model, Paul

Did you cut the contraversial wire?

If you didn`t then it caught fire due to the batteries finding the weakest wire acting as a fuse….and Bob`s your uncle

One learns quite a lot when serious unaccountable problems crop up

I feel quite happy with my set up now

That`s a bit daft saying that, eh? When it`s a ticking time bomb!

Bob

[Paul TParticipant @pault84577]

Hi Bob

It wasn't a wire, it was the Chinese speed controllers that overheated and caught fire, it was a common fault with these speed controllers.

Paul

[Bob Abell 2Participant @bobabell2]

Hi Paul

I can only say that the Esc's must have been the weakest link?

What batteries were you using?

Bob

[Paul TParticipant @pault84577]

Bob

The ESCs were crap and wouldn't take any amps without getting hot or blowing up, lots of people fell into the same trap.

The batteries were 12v SLA

[CookieParticipant @cookie15923]

Hello Bob , My first Perkasa i used the same esc as yours i got from Perkins and were fine , However i bought 2 more more for another project from another supplier and they were awful , Hope Yours are not the same Best Regards Dave

[Bob Abell 2Participant @bobabell2]

Hello Cookie…..Welcome aboard

In what way were your ESC awful?

Just curious

All the best, my mate

Bob

[CookieParticipant @cookie15923]

Hi Bob , The revs were all over the place , did not respond to the stick sometimes , the motors ran at different speeds to each other they were wired to a Y lead into 1 channel of the receiver , i tried everything but nothing worked so ended up sending back . They were cheaper than the Perkins ones but looked identical , anyway i got 2 more Perkins ones and they were fine .

Take Care Bob

Best Regards Dave

[ashley needhamParticipant @ashleyneedham69188]

They have been selling the JP esc’s for years so presumably they are ok.

i used mine once on something low powered and it was ok, barring at very slow revs however I suppose you don’t buy a 50A esc to run a speed 400!

Ashley

[Ray Wood 3Participant @raywood3]

Hi All,

I've had a couple of those blue one's both failed, wouldn't touch with a b pole , 😉

Bob I hope your lucky with yours 👍

Regards Ray

[Paul TParticipant @pault84577]

The Chinese ESCs look exactly like the Perkins units.

[Bob Abell 2Participant @bobabell2]

Thanx chaps, that cheered me up, no end!………Northern expression

Bob

[Bob Abell 2Participant @bobabell2]

Progress update

At the moment, not much progress to be made

Waiting for white paint to spray the inside of the hull, to seal unreachable areas

Then refit the Control panel

Tidy up the wiring and loose items

But in the meantime, I`m now having a look at the decking, to get rid of the plain looking appearance and get the scale of the model looking more like a Warship. Missile hatches etc

Bob

[ashley needhamParticipant @ashleyneedham69188]

…laser turret with red LED laser light?

Two sizes of missile silo hatches, possibly with a missile peeping out of one?

Chaff/decoy launcher barrels..

Ashley

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