Brutus

[Paul TParticipant @pault84577]

Bob

Is this the section that you were curious about?

Section taken through image 1 showing problem of mounting the motors within the confines of the hull at F1 / F2

Paul

[Dave MilbournParticipant @davemilbourn48782]

We can argue the merits and failings of the Fairey designs backwards and forwards all day and I am quite looking forward to my learned friends rebuttal.

Nope – not this time. We'll have to agree to disagree on this one, Paul. At the end of the day it's your design and you set your own parameters. I can recognise a brick wall when I see one and I learned a long ago that there's no mileage in trying to argue with one.

DM

[Bob Abell 2Participant @bobabell2]

Thanks Paul…..

How about two over steep prop shafts, but with a bottom plate to deflect the inclined thrust….along the horizontal?????….And gerronwithit!…..lol

That`s a new one!

Bob

[Paul TParticipant @pault84577]

Bob

Not so new………..you are describing the principals of a jet drive.

Paul

[Bob Abell 2Participant @bobabell2]

Sounds OK to me, Paul

A Jetdrive matches your project nicely?

Bob

[TelstarParticipant @telstar]

Paul

Is something like this what your looking for

**LINK**

Cheers Tom

[Paul TParticipant @pault84577]

Tom

That's exactly the piece of kit that I am looking for.

Cheers

Paul

[Paul TParticipant @pault84577]

The keel is now detailed

The cut out in the lower bow is a weight saving feature.

You can see how the keel relates to the basic design.

Paul

Edited By Paul T on 04/12/2013 20:36:02

[Dave MilbournParticipant @davemilbourn48782]

Paul
Please note that the belt drive Tom has found is for 800-sized motors. These may be too big for Brutus.
Dave M

[ashley needhamParticipant @ashleyneedham69188]

Paul, how fast do you see this going? Or perhaps how fast do you WANT it going is the question?

Ashley

[Paul TParticipant @pault84577]

Dave

Thanks for the warning but £32 each is a bit rich for me so I will be making a bespoke set.

Ashley

Personally I don't envisage doing anything more than 15mph as I am principally designing for looks rather than excessive speed but theoretically the hull is capable of straight line speeds somewhere between 25 > 30mph.

Paul

[Paul TParticipant @pault84577]

The main frames

[Dave MilbournParticipant @davemilbourn48782]

I like F7 best…………………

Sgt Pepper

[ashley needhamParticipant @ashleyneedham69188]

!! wont say it. Ashley

too early to ask about top access??

[Bob Abell 2Participant @bobabell2]

Hello Paul

This looks a very interesting project…………….. But the motors and props look extremely small?

Why don`t you move the motors forward and abandon the belt drive?

The lightening holes add a touch of quality to the model, was that your intention?

I think I`ve seen a photo recently of this boat…….Have I?

Bob

[Paul TParticipant @pault84577]

Dave:

I can just see you standing by a lamppost.

Ashley:

No its not to early……main access will be via the cabin superstructure and secondary access via the forward deck.

Bob:

Worry not as the motors and props are more than adequate for both long term endurance and sustained periods of speed.

The only image of Brutus is this one and as far as I am aware this design is unique.

The hull is a sea axe design that has been fascinating me for a long time whilst the cabin has its roots in Maximilian.

Paul

[ashley needhamParticipant @ashleyneedham69188]

Paul. This picture makes more sense, at least to me,as it were, if you cover up the waterline with a bit of paper and then it looks a bit like a Thames slipper…with the slopy back. No disrespect to your drawing of course.

The odd bit is the bow bit underneath the water. I am wondering…this sticky-down bit (I am sooo technical) stays in the water, thrusting through it like a knife through butter and dividing the waters like DM`s wit through a boring dinner party ? Is the boat intended to rise much or does it , as I suspect, stay fairly flat? or at least is that the intention.

My HMS Midge, with the negative raked bow rises out of the water, Turbinia style..mainly due to the cut-up at the back which is long and fairly "up". I made the bottom of my HMS Hasty virtually flat with only the tiniest amount of cut up at the rear and lo and behold it not only goes a lot faster but remains perfectly horizontal whilst travelling at speed.

Thinking about it, it must stay flat with the bow in the water or there would not be much point in this hull form?

Ashley

[Paul TParticipant @pault84577]

Ashley

Rather than do a long winded technical (boring) explanation about hull attitude

 

Your comment about a slipper launch is bang on as that is where the inspiration came from.

The concept is that the bow and long fore deck are square cut and brutal in appearance but as the design progresses toward the stern the body becomes more graceful and flowing as it disappears below the stern.

Paul

Edited By Paul T on 06/12/2013 16:35:57

[Paul TParticipant @pault84577]

By Christmas the design will be worked up to a point where construction of the prototype can begin, now all I have to now is persuade the shop floor that its a buildable project.

[Bob Abell 2Participant @bobabell2]

Sounds like another epic thread is on the cards!

Bob

[Paul TParticipant @pault84577]

Yes Bob it will be a real epic and certainly not one for the faint hearted as building something this experimental will take both engineering and theoretical skills.

[Bob Abell 2Participant @bobabell2]

Any chance of one of your very artistic isometrics, Paul?

I seem to be nibbling at the bait!

Those fancy frivolous lightening holes in the formers, would be easier to produce with simple drilled holes, old chap

The motor and prop still look too small……..Try to remember the Ellie stuff, I`ve got in stock!

Bob the sucker for a challenge

[Paul TParticipant @pault84577]

Bob

I am currently doing the iso pictorial build sequence and will be able to produce the 'finished' version when this section is completed.

The holes in the frames can easily be produced with a router (or your dremel trio) re the motors I cant remember what you have in stock but the spec for the motors is 600s but I am sure that anything up to 800s will do the trick.

Paul

[Paul TParticipant @pault84577]

Bob

Whilst you are busy nibbling its only fair to remind you that Brutus is just over 4ft long but it will be a challenging build worthy of your skills.

Paul

[ashley needhamParticipant @ashleyneedham69188]

And what a fabulous rough weather boat this should turn out to be at this size!! I would like to see a good watertight front access hatch and same for rear. A wave cleaving boat in teh rough..yes please (but not yet)

Ashley

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