Vintage Gentleman’s Cruiser

[Bob Abell 2Participant @bobabell2]

Some readers are asking to see the WIP……Already!

I`ve just made a start on drawing the formers on plywood and have cut the keel from two layers of 5mm

The formers will also be similar, as the resulting sandwich is very flat and rigid

It`s a big boat……..Some of the formers are 16" wide……Lovely!

Todays tip…

Have a nice planed edge on the plywood sheet and cut the surplus paper from the drawing template…on the bottom edge

Use the cut edge to line up the template with the plywood edge…..A nice accurate start

Bob

[Dave MilbournParticipant @davemilbourn48782]

Looking at Dave M`s motor list, the MFA850 produces 80 amps, but the 700`s are all over 100 amps

You'll find that these figures are the stated power output in Watts, being the current drawn (in amps) multiplied by the voltage at maximum efficiency. I've never encountered a brushed motor which would exceed 100Amps – except something like a car starter motor.
I would fit two of these, running on maybe 15 cells each. Boat into water > switch on motors > water leaves lake!

Dave M

[Bob Abell 2Participant @bobabell2]

Thank you, Dave

We are not really after insane power, it's that power crazy Looney in the Drawing Office, he seems to have forgotten we are building. Gentleman's Cruiser!

Bob

[Bob Abell 2Participant @bobabell2]

This is my preferred method of hull build………Hope you don`t mind, Paul

It`s a spine beam screwed to a flat surface, with the formers straddling it

Location notches, yet to be added

This method saves having to make and assemble the frame base feet, which are then screwed to the work surface

This method was used for the Brutus build

Bob

[Paul TParticipant @pault84577]

These are the 3ft and 4ft design prototypes made from foamboard.

The design prototypes are produced to test the accuracy of the design before moving on to building from timber

 

The bow on the 4ft was an experiment with wide planking that didn't work very well so the design will be changed to narrower planks or full ply skin.

The TV paper gives a good idea of scale, Captain Bobs version is 5ft so it will dwarf the smaller boat

Edited By Paul T on 02/08/2014 16:30:32

[Bob Abell 2Participant @bobabell2]

I must say, that Paul has worked really hard producing his model boat range and since they are created with CAD, the drawings are very precise

Congratulations Paul, you really have made a name for yourself

Three sizes of Lady Jane……..Three foot, four foot and five foot

With CAD you can have any size!……….Even full size!

Three Lady Janes……….The shape looks rather square and upright, but with a few brass handrails on the deck and cabin roofs, lifebelts and hooters, should break up the stark appearance

Refer to the photos of the full size craft at the beginning of the thread, for the finished appearance

Bob

[Bob Abell 2Participant @bobabell2]

Quick assembly of the frames, to show Paul the latest state of play

What do you think, Paul?

The front end…..Note the difference from Paul`s drawing, of the former location…..Central spine method

Needless to say, the working surface and central spine are dead flat and true

Bob

We like big models, note the 12" rule for scale

[CookieOldParticipant @cookieold]

Hi Paul & Bob AKA Batman and Robin , I have just started reading this thread as i am thinking this could be my next build with Bobs kind offer of giving me plans at Haydock . I fully understand Pauls concerns with H&S in this claim driven world we live in . However if i was Paul he could put a simple out clause on all his plans that if the correct PPE and lifting gear is not used then serious injury may occure. SORTED.

Best Regards Dave

[Paul TParticipant @pault84577]

Captain Bob

The central spine is an easier and quicker method of building however it should be said that it does have a serious downside that might trip up the inexperienced.

Without using the thicker supports which are designed to hold the frames firm in both length and width there is a chance that the frames will twist across the width.

Dave

Unfortunately we do live in a very litigious age and a designer can no longer simply issue new designs without having thought and explained how they should be safely built and operated. The problem doesn't really apply to smaller, lighter models but when the boats get large and heavy the logistics of handling, transport, launching and recovery become an issue.

Paul

[Bob Abell 2Participant @bobabell2]

Don`t worry, Batman

The trick is to fully assemble the structure, dry, using clamps, heavy blocks and lacky bands…..and when all is square and Bob on…….Gradually glue all the joints, without any dismantling, but reinforcing the joints with glued blocks.

The structure will be well glued again, when the hull is turned over

POW!…..That`s the way I do it, anyway

Robin

[Bob Abell 2Participant @bobabell2]

Shop floor to Drawing Office

The transom side edges are drawn vertical and parallel

The full size craft has sloping sides

Please advise solution

Shop floor PR Exec

[Paul TParticipant @pault84577]

Drawing Office to Shop floor minion.

The transom on the Lady Jane is designed to be vertical and parallel.

I wanted our first foray into hull planking to be as easy as possible and the barrel stern presented to many problems for the novice plankers so I kept it square.

Paul

[Bob Abell 2Participant @bobabell2]

Bitterly disappointed shop floor staff to Drawing Office

Will you be issuing an amendment for the discerning modeller who prefers the barrel stern?

BDSFS

[Paul TParticipant @pault84577]

Ok Bob

Just for you.

Do we know a discerning modeller?

Paul

you had best stop work on the rear end of the boat as this 'little amendment' will affect almost everything to the rear of Frame 8

[Bob Abell 2Participant @bobabell2]

That's the way, Paul, we want Lady Jane to have a shapely bottom!

What about a shapely cabin too?

Just having an early look at the stringers…..Might have a problem with over ambititious stringer flexing?

Bob

[Bob Abell 2Participant @bobabell2]

Hello Paul

A few pictures of the transom end to perhaps help you with the transom mod?

And a general view

The structure is only loosely put together

Bob

[Bob Abell 2Participant @bobabell2]

Hello Paul again

We seem to have a problem at the front end?

The breasthooks don`t fit the keel upright

The stringers look optimisic

Former one to former two looks like one giant step for mankind?

The structure is only loosely put together

Bob

[Paul TParticipant @pault84577]

Bob

Re the breast hooks: I think you are using the old drawings as the breasthooks were revised on drawings 02r1 and 03r1.

Frame 1 and Frame 2 look weird but they do work as its the point on the hull where the skin makes a sharp change from vertical to near horizontal.

The stringers are thin but the calcs do work and the hull becomes strong when the skin is glued on.

Paul

Jane has had a look at the design and said it might be better to extend the breasthooks back to Frame 2

Edited By Paul T on 07/08/2014 16:43:59

[lnvisiblemanParticipant @lnvisibleman]

Extended breasthooks would compliment the shapely stern !

[Bob Abell 2Participant @bobabell2]

Hello Corporal

So you noticed the demotion after all!

Breasthooks solve a lot of bent stringer problems and will be needed for the bow section, with out a doubt

Paul,………Are you issuing new breasthook drawings?

I think we need them

Bob

[Paul TParticipant @pault84577]

Drawing Office to Sweatshop

This is an automated reply…..the drawing office is closed at the moment as we have all gone home for tea but we will get back to you about your request during normal office working hours of 2pm to 2.05pm…..maybe.

[Bob Abell 2Participant @bobabell2]

OK. Paul

Take your time…..There`s no rush….It`s just a hiccup

Frames two and three seem to be in conflict?

Bob

[Paul TParticipant @pault84577]

As if there wasn't enough problems in this world, now we hear that Frame 2 and Frame 3 are in conflict.

A quick phone conversation with Downing St this morning has ruled out UN intervention and any imminent NATO action so it looks like its up to local mediators to try and resolve the issue.

[Bob Abell 2Participant @bobabell2]

Idle production team to Drawing Office, amendment and correction Department

Nice to see you back to your old flippant silly self!…..But have we arbitrated the conflict?

In other words…..What's the situation in the war zone?

Right now, in our part of Manchester, we've got the Mother of al rain storms, don't know how you do it!

Bob

[Bob Abell 2Participant @bobabell2]

The latest WIP situation

The stringers terminate at Former 3……Thereon, we have two sets of three bulky breasthooks to take care of the tricky flexing

Have a great Eureka Moment idea for situations like this!

The stringers are 10mm square and therefore are not very flexible

Answer……Use four 5mm stringers!………Like it?…………Could be useful in the future

Question for Paul…..Where do the two stringers with red ends terminate?

Bob

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