Charlie

[Paul TParticipant @pault84577]

In keeping with my practice of designing a model in celebration of the birth of a grandchild I would like to introduce Charlie.

Charlie take its inspiration from the Ellie design and follows the theme of traditional cabin cruisers.

The finished model will be 4ft (1200mm) long and be powered by twin 850 MFA motors.

Paul

[Paul TParticipant @pault84577]

[Andy CParticipant @andyc56856]

Nice lines Paul.

Andy

[Colin BishopModerator @colinbishop34627]

Why twin props Paul? Most launches of this type would be fitted with one.

Nice design though and reminiscent of the old Aerokits Sea Rover although rather bigger!

Colin

[Bob Abell 2Participant @bobabell2]

48" Is a nice useful size, Paul………Is it possible, you could offer a laser cut set of profiles, for the chaps lacking a bandsaw?……We may get a few takers then?

Two 850`s sounds interesting too

Perhaps, one prop with an Abell Drive would be nice, for the more adventurous modeller?

I think the rear window should be in the same style as the front one……eh?

How about two keels, so it could stand on it`s own two feet?

Regards to Jane btw

Bob

[mike farrellParticipant @mikefarrell21522]

Welcom back with your design mind set up and running.I assume Jane is making progress which will be goood news.

Two things Colins why and Bobs Abell drive ,I would like to build with Bobs Abell drive with 2 800s and driving a large prop.Nice sedate pace with plenty of umf when needed

Will you bethinking of Curtains around the stern?Michael

[Paul TParticipant @pault84577]

Hi Andy

Glad you like the shape, it came about from the memories of the cabin boats from my youth.

Hi Colin

I agree that these boats (both model and full size) traditionally had a single motor but with Charlie being 4ft long and fairly chunky I decided to specify a twin motor set up.

A lot of care and attention has gone into designing Charlie so that it isn't the same as a Sea Rover but I have to admit that there was bound to be a very strong resemblance.

Hello Captain Bob

Having parts pre-cut and creating a basic kit is something that I have been thinking about, I have even been talking to a chap who has a CNC cutting machine but I have a lot more research to do before making any decisions.

Twin keels is a good idea and I will alter the drawings accordingly.

Hello Michael

Yes its nice to be drawing something traditional and I have high hopes of this particular design. The twin motors will provide a nice power range (with lots of umf)

Dear All

Jane is back at home but still poorly, she will be on anti clotting medication for some time and will have a few trips to out-patients before she is clear of the blood clotting problem.

I have been promoted to head nurse and I am now responsible for giving Jane her daily injections.

Jane has asked me to pass on her thanks for all of the kind words.

Paul

[Colin BishopModerator @colinbishop34627]

Do pass on to Jane all our heartfelt good wishes for a full recovery. There is no one else who can keep you in order!

Colin

[Paul TParticipant @pault84577]

Thanks Colin, Jane says that she doesn't know about keeping me in order but she will have a go. lol

[Colin BishopModerator @colinbishop34627]

Paul,

If you adopt twin keels then it would be logical to have twin rudders also to improve handling.

Colin

[Paul TParticipant @pault84577]

Colin

Good point.

Here is a question for the budding designers out there……if I adopt the twin keel approach do I remove the dead wood from the base of the mid hull keel?

Paul

[Bob Abell 2Participant @bobabell2]

I realise now that twin keels was a bit of a rash suggestion

Now suggest one prop and one rudder and central keel as your original design

You could fit twin out riders for the built in stand effect

Bob

[Paul TParticipant @pault84577]

Bob

I don't think of it as a rash suggestion, in fact I think its a very good suggestion otherwise I wouldn't have changed the design.

I am curious as why you think its a rash suggestion?

Paul

[Bob Abell 2Participant @bobabell2]

It doesn't seem right, a single prop with twin rudders?

Bob

[Paul TParticipant @pault84577]

Captain Bob

There will be two motors, two shafts, two props, two rudders and best of all two keels.

With having two of everything your suggestion of two keels make perfect sense

Paul

[Bob Abell 2Participant @bobabell2]

Ok Paul

What about……..One 850 motor, which has a shaft at each end, with two timing pulley's……One for each prop shaft

Just to add a bit of interest to the build?

Bob

[Paul TParticipant @pault84577]

Hi Captain

I'm keeping this one simple so its going to be two motors.

Paul

[Bob Abell 2Participant @bobabell2]

Let's see a few more drawings, then?

Bob

[Colin BishopModerator @colinbishop34627]

I think the twin motor/twin rudder setup should make the boat quite handy.

Colin

[Paul TParticipant @pault84577]

Sorry Bob

No drawings with this one.

Colin

It should be a handy little boat and will come in useful if I ever want to go water skiing.

Paul

[Colin BishopModerator @colinbishop34627]

The mind boggles Paul…..

Colin

[mike farrellParticipant @mikefarrell21522]

Hi Paul As my last comment a single drive with a Abell system would work as in a Boston system or as I know it a cathedral hulled system

They are using a single drive system and are used simply as a stable shape which can have a central hull with are 2 sponsons far apart or close, and can be forward or further back in the shape allowing the bows to pierce the water whilst making it very stable

In real life a cathedral hull can turn on a sixpence so it would be interesting if a model would do the same .Michael

[Mark Jarvis 2Participant @markjarvis2]

Hi Paul

A lot of boats keep the deep keel as well as the keels, i think that some hulls are fitted with side keels when they are aground at low tide, stops them leaning to far over and potentialy swamping.

High speed hulls dont appear to have a central keel beyond the propshafts, does this help them to plane???

Charlie doesnt seem to be a planing hull, its a cruiser, medium speed, semi displacment hull shape.

If you stick with the central keel, stay with one rudder. Given twin motors use twin speed controlers for more manuverability.

Mark

[Paul TParticipant @pault84577]

Hello Michael

Thanks for the input

I did design a cathedral hulled boat called RiverCat which could easily be adapted into a cabin cruiser.

But this one had twin motors.

Very fast and could turn on a sixpence.

Hi Mark

Thanks for the thoughts

I have decided to keep the main keel simply to keep some strength along the spine, the pond banks have a nasty habit of jumping out in front of me so the extra strong keel helps the boat bounce.

You are right in assuming the removal of the mid keel does aid planing but with Charlie I'm not looking for mad speed and keeping the keel should help keep the boat straight on long runs.

I will be using twin rudders each positioned behind the props as this will help with low speed manoeuvring

Paul

[Paul TParticipant @pault84577]

Cut out the frames and keel today.

Used the new cordless jigsaw which continues to impress, it is light, quiet and very well balanced. I got about twenty minutes cutting time out of one charge (which suits me fine)

Went to Atlantic Timber to buy a new building board and came away with a chunky 30mm thick piece of MDF (£3) and bought 236ml Gorilla glue for £2.75.

With the frames and keel loosely laid out on the building board the boat looks to be nicely in proportion.

Paul

(Sorry Bob no photos this time)

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