Prototype build of ELLIE

[Bob Abell 2Participant @bobabell2]

Thank you, Dave

I had to read your post, several times, to make sense of it

When I refer to SloMo, I'm referring to The Ellie SloMo….the Bitza

The big SloMo was scrapped years ago

Are you saying that these Brushless motors will be ok in the Ellie SloMo?

I think they will, but they are very small?

Bob

[Diede van AbsParticipant @diedevanabs87670]

Bob – 35mm for an outrunner is not quite small, these motors pack QUITE some punch.

I have two 3000KV outrunners @ 26mm diameter driving a 70cm NQD toy speedboat on 2S LiPo, and it goes like hell (as far as the stock propshaft setup allows it to – they are too close to the transom for real speed)

I'd say: Give it a try!

Edited By Diede van Abs on 27/01/2014 12:58:46

[Dave MilbournParticipant @davemilbourn48782]

Bob
Brushless motors are much more efficient than brushed ones, so the equivalent motor will be smaller. In fact 38mm is about the same diameter as a 540 motor although the brushless one will be considerably shorter.
If VMBC say that this combination is ideal for models up to 40" long, running on a 7.2v NiMH pack then that's where I would start. I can't see that this ESC has reverse so be prepared for that if you buy this setup.
I think that twin motors would be a handful, but that's not to say "don't try it". You do have form for a degree of recklessness……
I should have realised that you'd scrapped the big SloMo – after all, I had the motors, props and shafts out of it for Mick Burke!

Dave M

[Bob Abell 2Participant @bobabell2]

Thank you, Diede

I think I'll try a pair running on NiCads and assess their suitability for the Brutus model

Are capacitors necessary on Brushless motors?

Bob

[Dave MilbournParticipant @davemilbourn48782]

No brushes = no commutator = no sparks = no RFI = no suppression. This was covered in my recent MB article……………"how quickly (we) forget",

DM

[IAN_IParticipant @ian_i]

Hi Bob…

Oh dear….LOL

Sounds like you will have to join me in the corner with the must try harders….lol

Ian

[Bob Abell 2Participant @bobabell2]

Thank you, Dave…..Haven't seen your article, yet

Bob in the corner with the rest of the thickies

Edited By Bob Abell on 27/01/2014 15:30:57

[Dave MilbournParticipant @davemilbourn48782]

**LINK**

Pages 26 – 39

[Bob Abell 2Participant @bobabell2]

Thank you, Dave for the info

Pleased to report that the Brushless gear is now on order and will also be suitable for Brutus!…..wow!

SloMo is about to go into orbit and should please Paul immensely…….as it sure is ………a Wolf in Sheep`s clothing!

Also on order is a Tin Hat, a set of reins and a pair of gold plated spurs from the local Rodeo outfitters shop!

In other words……..Brace ourselves for fireworks!….with a capital BANG!

Hopefully, anyway…..Bob about to get another dollop of Egg on his face!

[Dave MilbournParticipant @davemilbourn48782]

Also on order is a Tin Hat, a set of reins and a pair of gold plated spurs from the local Rodeo outfitters shop!

You'll look kinda weird water-skiing behind a model boat wearing that lot………… Still, if that's how you get your rocks off….(as they say).
Let us know in advance of launch date; Nottingham has a 60's nuclear bunker only about two miles yonder.

DM

[Bob Abell 2Participant @bobabell2]

This is the thread, Danos

Enjoy the build

Any problems, just ask

Bob

[Bob Abell 2Participant @bobabell2]

Danos, please read your mail

Bob

[Bob Abell 2Participant @bobabell2]

Danos

Here is the link for ordering a set of plans…..

**LINK**

All the best

Bob

[Bob Abell 2Participant @bobabell2]

Just to let you SloMo fans know, SloMo will be worked on shortly

The build is clashing with the Brutus creation at the moment…..and Ellesmere Port Show is only about two weeks off!

I will be taking both boats to the show and possibly Ellie also and will appear on the Etherow stand

See you there?

Bob

[Dave MilbournParticipant @davemilbourn48782]

So I have finally got round to installing all of the innards in Sea Spray prior to chucking it into the pond and shoving the stick forward. Here you go:

and a close up of the electronics end:

From the left we have two MFA 540/1 motors with flexible couplings; ACTion P95/2 twin indicator fuseboard; ACTion P94 Dual ESC/Mixer, modified to operate from two separate battery packs and with 90 degree cranked heat-sinks to clear the cabin floor; in-line mini-blade fuses between ESC and battery packs; Hitec Optima 7 receiver and switch; 4-cell receiver battery pack; 2 x 7.2v 5000mAH NiMH main power packs; Hitec low profile servo connected to twin rudders with Robbe tiller arms and SLEC connectors. The receiver aerial is fitted into a self-adhesive cable clamp on the inside of the port hull, above the waterline. There are no main power on/off switches. I am still waiting for some brand new ACTion P106 switch harnesses (it's a nuisance when you no longer run the company!) and I shall just use the Deans connectors as switches until the new ones arrive.

With a bit of luck sea trials will be this weekend.

Dave M

[Bob Abell 2Participant @bobabell2]

That's very nice, Dave….Well thought out and beautifully laid out too

You have just reminded me to fit some fuses….I had completely overlooked them!

Have you had a bath test yet?

Looking forward to a few ACTion shots on the water

Are you at Ellesmere this weekend?

Bob

[Dave MilbournParticipant @davemilbourn48782]

Thank you, Bob. In answer to your questions, the answers are no and no.
DM

[Tony HadleyParticipant @tonyhadley]

Dave,

A really neat installation, thanks for showing. Not a criticism but a question as to why the choice of 540 motors? Today wouldn't most installations choose to go brushless.

The reason behind the question is in the shed awaiting an upgrade and in need of tlc, is a Dark Class MTB (32" long) which is fitted with two basic 540 motors. I was thinking along the lines of replacing them with brushless, but seeing this installation it might not be necessary.

Tony

[Dave MilbournParticipant @davemilbourn48782]

Several reasons, not the least of which is that I have access to parts for all ACTion speed controllers from stock which I kept back for my own use when we sold the business! We did not get round to designing and manufacturing a brushless ESC. Also that this model – or plans for it – will be sold to many folk who will not want to install brushless motors, for all sorts of reasons. If it can be shown to perform well using brushed technology then it would also be fine using brushless motors, whereas the converse might not be the case.

Dave M

[Paul TParticipant @pault84577]

Tony

To reiterate what DM has said when I designed this model I had cost effective equipment in mind and fully expected builders to use cheap or spare motors and so the hull will perform well with most 540 (or larger) brushed motors.

I find that brushed motors provide plenty of power for scale speeds even though I will probably throw caution to the wind this summer and fit 3 brushless motors just to see how fast these hulls will go.

Paul

[Dave MilbournParticipant @davemilbourn48782]

Had the model out on the water at Papplewick Pumping Station this morning. Weather was a bit gloomy but there wasn't much wind. Sea Spray sits very slightly stern down from the way I have the gear installed, which is not a problem. Performance with the two stock 540/1 motors turning Robbe 35mm x 3 blade plastic props on 7.2v is very pleasant; not screamingly fast, just a steady scale cruising speed with the bow up and a nice wake. The spray rails also do their job so the model runs very dry. There wasn't a drop of water inside after half an hour's running.

After about ten minutes of cruising round at between 3/4 and full throttle the batteries, motors and speed controller heat-sinks were checked and were stone cold, which indicates that I got the power train about spot on. With the twin rudders and the mixer/speed controller the model is very manoeuvrable. With two hotter motors and/or more voltage then this hull would plane easily, but that would spoil the atmosphere of this particular version of Paul's design.

I'm not sure what I will do with this model now. I've had my fun with building it and I've always preferred that side to sailing the things. Any offers?

Dave M

[Paul TParticipant @pault84577]

Hi Dave

I am very pleased with the way the model looks on the water and you are right about the spray rails.

The scale speed with the stock motors looks just right.

Paul (a happy bunny)

[Dave MilbournParticipant @davemilbourn48782]

We aim to please, sir.

Dave M

[Peter FitnessParticipant @peterfitness34857]

She looks great, Dave, very realistic.

Peter.

[Bob Abell 2Participant @bobabell2]

Hello SloMo fans out there!

Latest situation

Have ordered two sets of Brushless gear for SloMo

Having gained some experience with the motors for Brutus, I'm looking forward to this exciting part of the build

We should have a sparkling performance, with two brushless motors installed!

More later

Bob

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