Vintage Gentleman’s Cruiser

[Bob Abell 2Participant @bobabell2]

Just had a phone call from a Technical Adviser………Brother Geoff, suggesting, buying a large shallow paddling pool for the Sea Trials!

Many thanks, our Geoff……That`s a great idea!………And solves a lot of problems and possible aggro at the lake!

Can now make sensible progress with the electrix and floatation tests………..Wow!

What a good suggestion………Why didn`t you think of that, Paul?

Capt Bob

[Paul TParticipant @pault84577]

Unless you have a paddling pool or garden pond the only option will be to test the boat at Etherow.

Bob I posted the above on the 23rd March………….

Paul

Edited By Paul T on 28/03/2015 10:26:18

[Bob Abell 2Participant @bobabell2]

Ah! Ah!……So you did, Paul!

Sorry for not stopping to think, my mate

A paddling pool is the answer!……..Now that summer is on the skyline, I could work on the VGC in the garage too!

See!…..It get`s better all the time!

How convenient it will be, to simply push the boat out and plop it in the water!………Shear joy!

Thanks Paul and Geoff for waking me up!

Bob

[Ralph PinchParticipant @ralphpinch41762]

Hi Paul, thanks for the plans, printed them today and they look great, used up a Brazilian rain forest before I realised that my PC printing setup was defaulted to Letter format, trip to wicks is needed before I start the build.

Bob, thats a great idea for indexing, see you use a center lathe when turning wood, do you use hand chisels or tool steel, I use tool steel but am thinking of getting a small set of wood chisels? .

Ralph.

[Bob Abell 2Participant @bobabell2]

Hello Ralph

I guess you are proposing to build a Lady Jane?

I wish you all the best and if you need any info….Just ask

Pleased that you understand the rim drilling procedure

I always use normal lathe tools when turning wood…..You get better accuracy that way

Bob

[Ralph PinchParticipant @ralphpinch41762]

Thanks for the info Bob, yes I am going to attempt the 5' version, perhaps with a few tweaks as the build progresses. I'm going to read all the posts first, then I have just got to fit the rear canopy and electrics to the Sprite before I start.

Like the drilling guide on the lathe, good idea

[shipwrightParticipant @shipwright]

Bob,

Re your posting on 27th March – ingenious substitute for dividing head (as you said).

Thought it worth posting from Wikipedia a description of a dividing head (also known as an indexing head) :

**LINK**

Ian

[Bob Abell 2Participant @bobabell2]

Thank you, Ian

My lathe idea is good enough for most model making needs

Mind you, I'd have a job pitching out a pentagon!

Bob

[Paul TParticipant @pault84577]

Bob

I must be missing something about your lathe procedure, isn't it easier and more precise to divide the circumference by the number of holes and simply mark them off.

Ralph

Good luck and if you get stuck please don't hesitate to ask.

Paul

 

Edited By Paul T on 29/03/2015 14:52:34

[Bob Abell 2Participant @bobabell2]

I'm very surprised you say that Paul!

Marking out eight holes would be a poor way of doing it

Using the gear tooth method, the pitch is dead on, your method is possible but prone to errors

Supposing the hub was 2" dia. = 2 pie circ divided by 8 = 0.786"

imagine pitching out 0,786"……8 times…..You would get a creeping error in no time

You would end up bodging it!

Drilling the holes in a drill vice, eight times is prone to error also…..Radial error and sideways error

You missed your chance there, boys!…..I said earlier, that I would struggle pitching out a pentagon

It would be no problem……It's every eight gear teeth!……Obviously?

Bob

[Paul TParticipant @pault84577]

Hello Bob

Firstly I would work in metric 50mm / 8 = 6.25mm,

Secondly working with instruments would be more precise than relying on lathe gearing which, as we all know is subject to wear and gear slop.

Paul

[Bob Abell 2Participant @bobabell2]

Paul….Once again, you surprise me!

Working in metric or Imperial…..Makes no difference whatsoever

Working with instruments etc……What instruments are you talking about?……..A bent rule?

As far as we are concerned, there's no wear on my lathe…….The sprocket in question is not in mesh with any other gear

Dagga Dagga Dagga Dagga……Consider yourself shot down in flames!

Biggles

[Bob Abell 2Participant @bobabell2]

Paul…….Are you pulling my wire?

50 /8 = 6.25………..6.25? Refers to what?

And another thing……..50mm isn't 2"

I think you are pulling my leg?

Kevin is having none of it!……Ha! Ha!

Bob

[Paul TParticipant @pault84577]

Bob

I would use a digital micrometer and precisely measure across the chord of the radius.

Paul

[Bob Abell 2Participant @bobabell2]

You are talking like a Brick layer now

Kenin!……Take no notice…….Paul is feeling mischievous today?

Bob

I can only assume, that Jane is feeling better today?

Edited By Bob Abell on 29/03/2015 16:28:06

[Paul TParticipant @pault84577]

Bob

I'm not being mischievous.

I'm just providing an accurate and repeatable solution to the problem, your lathe might be accurate but many are not, my method can be confidently used with any equipment simply because it relies upon proven mathematics.

Paul

[Bob Abell 2Participant @bobabell2]

Hark at him!

Paul……A micrometer can't measure a chord!

Even Kevin knows that!……..And Jane for that matter!

Bob…….Getting a bit concerned now

[Paul TParticipant @pault84577]

Bob

B X is a chord measurement and this is the accurate way to establish points around a circumference.

How would you find the drilling points on a 12m radius wheel divided into 28 segments?

Paul

[Bob Abell 2Participant @bobabell2]

Hello Paul

A 12m radius wheel?

If it was important, it would be done on a Craven 32 ft Boring Mill!

If it was the local Bandstand, a tape measure may do it, but at 24m diameter, it is a risky job

Bob

[Paul TParticipant @pault84577]

Hello Bob

If it was important, it would be done on a Craven 32 ft Boring Mill

Would a 12m (39ft) radius wheel fit onto a 32ft Boring Mill?

If it was the local Bandstand, a tape measure may do it, but at 24m diameter, it is a risky job.

It wouldn't be a risky job if the engineer doing the setting out understood the correct application of mathematics and that by measuring the cords around the circumference would achieve millimetre accuracy.

PAUL

[Bob Abell 2Participant @bobabell2]

Hello Paul

I admit I got the units wrong with the Craven Boring Mill suggestion……But to get out of it with honour, I`m fitting outrigger supports to the table, since we are only marking out!

Just had an Email from Kevin……He thinks we are falling out!

I can assure Kevin that we are the best of friends and enjoy a battle of wits from time to time and the score at the moment is 40 all………Mind you, my outrigger suggestion could give me the edge?……..But if Paul knew about boring mills, he could call …..FOUL!

Our banter is also continued via Email…..So Kevin only gets half the story!…..lol

Nothing to be concerned about at all

Bob

[Paul TParticipant @pault84577]

Hello Captain Bob

In my professional life I had to have a working knowledge of machining equipment and how they work so that I could correctly specify steel components for building.

This is a boring mill.

Kevin needn't worry as this is all in good fun, Bob tries his best to catch me out but always runs aground when his arguments run out of steam.

Paul

Edited By Paul T on 30/03/2015 13:53:20

[Dave MilbournParticipant @davemilbourn48782]

a battle of wits from time to time and the score at the moment is 40 all………

Would that be half each then, Paul? Here is another boring mill……

(Tee hee).

DM

[Paul TParticipant @pault84577]

Ah yes Flat Foot mill

(Tee Hee, Tee Hee)

The score is 40+ for me and -40 for Bob

Paul

[Bob Abell 2Participant @bobabell2]

Well done, Paul………This is the size I was referring to………The year I started work!

It was designed by a German chap……Herr Zadow

It went to Canada and had a tight build schedule……….Needed to be built before the St Lawrence river froze over!

My pal Geoff R worked in the same Drawing Office, with 90 draffies!

Awerome

Bob

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