Prototype build of ELLIE

[Bob Abell 2Participant @bobabell2]

That`s not a job for Newbies!

Shaping the framework at the front end is rather a handfull!

The Bread hook is on the joint line and will take some careful shaping

The joint line will need defining with a section drawing…….Is the 6mm material shared equally with top and bottom skins?

Bob

[Paul TParticipant @pault84577]

Dear All

Bob has raised another good point about skill levels and I should explain to the readers that bending with a rachet strap is not a job for newbies but when I built prototype #1 I was testing the feasibility of using 4mm ply.

For the production design it will probably be better to use a double skin of 1.5mm ply but I am awaiting the outcome of Bobs build to see what he recommends before amending the design.

Bobs question about joint lines is also crucial as it highlights a fundamental point about design. All of the drawings use centre lines as the setting out points so wherever there is a 6mm frame the joint line (if there is one) is shared equally i.e. 3mm either side of the joint.

This drawing shows the joint line that Bob is referring to and indicates the centre line setting out position in red.

Paul

Edited By Paul T on 12/08/2013 19:07:54

[Bob Abell 2Participant @bobabell2]

Thank you, Paul

Don't think we'll need two layers of 1.5mm ply?

The "lands" of 3mm is not much for the skin glueing surface in the Bread Hook area?

Further down the hull, the lands are 6mm wide!

We need to back up the joint with Fibre Glass?…..In the bows area at least

Haven't got any ply at the moment, but will probably have a trip out tomorrow…..Greenfield

All for now…….Bob

[Paul TParticipant @pault84577]

Bob

Ultimately the thickness and material of the skin will depend upon your recommendations, the only reason for using 4mm on the original is that I commonly use this thickness on my 6 to 8ft models and it is a material that I am used to working with, you are absolutely correct in saying the newbies would struggle with 4mm and so rather than specifying a new thickness of material I am awaiting the outcome of your practical experiments.

Your comment about surface glueing areas brings the readers nicely into cross section drawings.

These top drawings show where a typical cross section is taken from and what the section looks like, if the reader looks at the side view of the design they will see some arrows just aft of the cockpit pointing forward.

The section is a view of an imaginary slice through the model looking in the direction of the arrows.

The lower drawing is a piece of the section and shows how the skin is fitted to the stringers and how the skin overlap effectively increases the glueing area without adding extra strength in this location.

The reader can see how the skin is jointed in this 'corner type' junction where the side of the hull meets the bottom.

This solution does not apply at the bow where the bottom of the hull changes angle to meet the near vertical at the stem post, this the the area where Bob is suggesting the addition of extra reinforcement in the form of glass fibre.

The question for the designer is wether the introduction of a new material such as glass fibre is the best solution to the problem or should the joints in question be strengthened with an existing material. i.e 6x6mm strip wood.

Paul

 

Edited By Paul T on 13/08/2013 07:13:38

[Bob Abell 2Participant @bobabell2]

Thank you, Paul

I'm still cleaning up the skeleton at the moment, that 6mm ply is tough stuff!……It is a job to be relished and not rushed ……….The structure is nice and strong, being secured to the bench.

I've noticed a few slight undulations along stringers B and K…..It's amazing how a slight variation stands out a mile, when viewed down the stringer, end on!

I'm using a very sharp chisel with a scraping action and finishing off with a crisp sanding block

I was just thinking….Wouldn't be nice to see a good collection of "Ellie's" on a stand at next year's Ellesmere Model Boat Show? It would be the ideal spot to sell a few printed copies of the plans too?

Bob in the PR Office

[Bob Abell 2Participant @bobabell2]

Tea lady to Mr Big……In the big house

Please Sir, I have something to say, please Sir……(With a timid curtsy)

Mr B……And what might that be, my little flower?

Thank Sir……..If it pleases you, sir………Ellie is a nice name for a Broads Cruiser, but not really suitable for a high speed Torpedo Boat, sir……Whatever that is, sir?

Mr T…….And what name are you thinking of, my girl?

I was thinking of something awesome, sir…..Like Tiger, sir?

Mr P……Hmmmmmmm?……Capital, my girl!…….Good idea, you shall be generously rewarded, let`s say…….Tuppence a week?……..And don`t spend it all at once!

Oh, thank you Sir…….er……The other boat, please sir, could do with a pretty name too, sir?

Mr Softie………Get back in that kitchen, girl!…….Think I`m made of money?

Such old world charm?……Bob

[Paul TParticipant @pault84577]

Whilst on the subject of military versions the hull would also lend itself to being a fire float, so its another potential superstructure to detail.

 

Edited By Paul T on 13/08/2013 12:01:08

[Dave MilbournParticipant @davemilbourn48782]

Are we getting bored, gents? To be thinking of names and shapes for other versions while this one hasn't even got a skin is indicative of wandering minds.

Wake up at the back there! Chins up! Shoulders back! Chests out! Chop-chop!

DM (from garden chair, with glass of Côtes du Rhône in hand, watching wife pottering and landscaper toiling…………..)

[Paul TParticipant @pault84577]

Hello Dave

The mind isn't wandering in fact it is busy detailing the boat launcher, as for the new variation I am just keeping the interest up.

My favourite wine before my enforced absence was Domaine du Caillou. I developed a taste during the late 90s and bought a couple of crates from a merchant in Douglas in late 1998 with some bonus money. Wonderful wine.

I thought that Liz would be busy painting the Huntsman that you bought for her

Paul

Edited By Paul T on 13/08/2013 14:39:09

[Dave MilbournParticipant @davemilbourn48782]

I thought that Liz would be busy painting the Huntsman that you bought for her

Paul

She's in disgrace after spilling the last tinlet of Dark Blue. Have you seen how much Humbrol Enamels are these days? Truly shocking.

DM

[Bob Abell 2Participant @bobabell2]

We are not bored old chap

I haven't got any plywood till weekend!!

Bob

ps…..Duckie has just mailed me…..He has a sheet of 1mm in stock……Can't really use it?

Before you ask, DM…..He got it from the Colwyn Bay show

Bob

Edited By Bob Abell on 13/08/2013 15:33:39

[Bob Abell 2Participant @bobabell2]

Paul

I came up with a big boat launcher, a few years ago

It was based on the canal lock principle and would have been nice to see it in action?

The problem with launchers is storage?

Bob

[Paul TParticipant @pault84577]

My launcher is sectional and folds flat for transport and storage, I've designed so that someone in a wheel chair can use it single handed to launch any boat upto 8ft in length.

[Bob Abell 2Participant @bobabell2]

Shop floor the Drawing Office

The prow needs looking at, old Bean!

The BH behind former 1 is 50mm across and has been sanded correctly

Still some way to go, so that the skin can touch former 1, but will end up sanding away the front edge of the prow

Your comments, please

Bob

Edited By Bob Abell on 13/08/2013 16:55:20

[Dave MilbournParticipant @davemilbourn48782]

Bob

Widen BH#1 by sticking a short length of 6 x 6 along the edge; let it set and then chamfer it to allow the skin to fit. By the looks of it you'll probably need to do that to BH#1 above the chine line as well. It's called "fettling" in polite circles.

Dave M

[Bob Abell 2Participant @bobabell2]

Thanks Dave,

I could easily put it right, but Paul will have to agree and the drawings will need updating

Bob

[Andy CParticipant @andyc56856]

Hi guys

Looks like it is coming along nicely. Can I say though, as a true beginner to the game, that it is starting to sound more and more complicated as the build progresses. Datum lines, breast hooks, back cutting the stringers etc is not in the beginers vocabulary. But I am sure it will be alright in the end. still looking forward to the completed model and seeing what the plans will look like.

Cheers, keep up the good work

Andy

[Bob Abell 2Participant @bobabell2]

Hello Andy

Don't you worry about it!…..Don't let technical jargon put you off!

If you need any advice……Just ask!

Bob

[Paul TParticipant @pault84577]

Andy

Don't worry to much about the technical banter as we are just having fun with each other and use big words to look impressive. I have to look up some of Bobs words just in case I reply with something daft.

When all the chit chat (and bullshine) is finished the final drawings and instructions will be straightforward and use simple language.

In fact I would value your comments and impressions on the final draft for ease of understanding so would you be up for doing a review?

Paul

[Paul TParticipant @pault84577]

Bob

This is a conundrum, the degree of error isn't clear on the photo so could you measure the gap between Frame 1 and the straight edge (as circled below)

Paul

[Bob Abell 2Participant @bobabell2]

Is this any better?

The rule is actually touching the edges of BH and former 1

The dimension you asked for is about 5mm

Bob

[Paul TParticipant @pault84577]

Is the degree of error the same on both sides of the keel?

[Bob Abell 2Participant @bobabell2]

Yes, Siree!

Quality control dept

[Paul TParticipant @pault84577]

Bob

There is certainly an error and the worry is that I can't pin it down so I am going to have some thinking time and hunt it down.

Signing off now.

Paul

[Andy CParticipant @andyc56856]

Posted by Paul T on 13/08/2013 18:36:36:

Andy

Don't worry to much about the technical banter as we are just having fun with each other and use big words to look impressive. I have to look up some of Bobs words just in case I reply with something daft.

When all the chit chat (and bullshine) is finished the final drawings and instructions will be straightforward and use simple language.

In fact I would value your comments and impressions on the final draft for ease of understanding so would you be up for doing a review?

Paul

Hi Paul

More than happy to take a look with the eyes of a noob. I am not too worried about the big words, to be honest I had to look them up too. Google is great for that sort of thing. Even though I did woodwork at school and passed the CSE (wow that feels like a lifetime ago) I don't rember some of the terms. I think the kids at school now are really missing out. But that is for another time and another place. Keep the fun and games going, as it is a jolly good read.

Cheers

Andy

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