Thor

[Bob Abell 2Participant @bobabell2]

Blimey!…………I thought it was a big un!……lol

Coming along nicely, Paul

But do we like the white deck?……Nope

Bob

[Paul TParticipant @pault84577]

Bob

Its only a prototype so the colour scheme isn't sorted, in fact its far from perfect as I didn't use decent paint or even decent masking tape, the rear deck should be grey.

Paul

Here is a picture with a ruler so you can judge the size.

[Paul TParticipant @pault84577]

Bob

The rear deck is now grey, the twin motors are huge and the calculated ballast is 50lbs.

You could have some real fun on Etherow with this beast, you and duckie being towed around the lake in the rescue boat.

Paul

[Paul TParticipant @pault84577]

Some progress photos

Edited By Paul T on 21/06/2014 13:31:39

[Bob Abell 2Participant @bobabell2]

Hello Paul……Nice to see you back in circulation again

I like your tugboat very much!…….The colour scheme is very striking and very topical with the Union Jack touch!

We would like to see the motors on deck if possible, to get a better feel for the promised power fest!….With a Grand Piano alongside for scale comparison!

Bob

[Paul TParticipant @pault84577]

[ashley needhamParticipant @ashleyneedham69188]

Paul you can get creme for the affliction concerning this boat. Myself I use xxxxxx which is available over the counter .

Consider changing the name? It would cause great hilarity at our pond.

Ashley (wiping tears from eyes)

[ashley needhamParticipant @ashleyneedham69188]

Sorry its just my sense of humour. I showed it to the mrs and she struggled to see my point (as ever).

Love the colour scheme. It probably breaks some club rules somewhere, but its great. Motors lost in the big hull, a bit like my Fantome motors.

Ashley

[Paul TParticipant @pault84577]

Hi Ashley

I get the jokeths but I always thought that your medical condition was treated with little blue diamond shaped tablets not cream.

Paul

[Bob Abell 2Participant @bobabell2]

Hello Paul

How about mounting the motors in the ABELL drive setup?

On deck, with the drive belts descending through the deck into the bowels of the hull….. With a nice riveted belt guard?

It would also keep the motors cool and would add interest to a rather mundane stern area?

Bob

[Paul TParticipant @pault84577]

Bob

Nice idea but it would place the weight of the motors to high in the hull.

Paul

[Paul TParticipant @pault84577]

Ashley

Jane was so concerned about the potential for hilarity that she has decided to change the name to Mighty Fodger.

Jane also sends her condolences regarding your need for tucks cream.

Paul

Edited By Paul T on 23/06/2014 18:13:05

[Paul TParticipant @pault84577]

Dear All

I have been a busy bee today ordering the four pumps for Thors thrusters.

And the twin 7 bladed 90mm dia propellers

Paul

[Bob Abell 2Participant @bobabell2]

Hello Paul

Would like to see your pumps and 90mm props on deck please, for size comparison and can we have a few more WIP pictures please?

The colour of the pumps are a good match?……Or did you paint the boat to match the pumps?…lol

Bob

[Paul TParticipant @pault84577]

Hello Captain Bob

Are you back in barracks or still on manoeuvres?

There isn't much physical progress to photo as I have been busy detailing the twin motor mounts and designing the pipework system for the four thrusters. As you know one of our happy band is having a go at building this boat so I want to keep a few steps ahead of this brave soul.

But for the technically minded here is a little design update:

Each of the thrusters can move 18 gallons a minute (or 1.3 litres a second) through a 29mm dia outlet, I am reducing the outlet to 15mm (which will increase the thrust), in order to contain the pressure I am using copper tubing and having to redesign a few internal details to accommodate the pipework.

You will love the props as they are truly experimental (whilst the design is good on paper it still has to tested in the water)

I will post some photos when the kit arrives.

Paul

[Paul TParticipant @pault84577]

Thor thrusters layout

[Bob Abell 2Participant @bobabell2]

Very nice drawing and very technical!………Was this done with Turbo Cad?

What about the ballast?

The downward step in the hull bottom is handy for the motor and propshaft?

Bob

[ashley needhamParticipant @ashleyneedham69188]

Paul how much were the little pumpy bunnies? they look interesting.

Cant wait to see the props.

Great drawing.

Will be an outstanding vessel from any number of viewpoints.

Thor Thrusters would also not be a very good name.

One of the pumps should make an awesome fire hose squirter…have a fan spray like they do when welcoming scarce and overworked RN ships back to port for scrapping.

Ashley

[Paul TParticipant @pault84577]

Hello Bob

Yes it was drawn on TurboCad.

The step down hull was actually designed as a 'step up' hull….the hull sides extend down where the pump intakes are to offer a little extra protection for the intake grills.

I am still working on the ballast ……which now looks like being shaped ingots of lead that will be fitted in wherever I have the spare space.

Hello Ashley

The pumps aren't cheap try looking up 'Rule 27d 1100 gph bilge pump' and see for yourself…….I shopped around and got a good deal on 4 of them.

The props should be a revelation (hopefully) as they were designed specifically for this model, they have been made from nylon and cut from solid blocks on a CNC machine. The shape is radically different with a large central boss and blades that look like they have come from a turbine.

The premise behind the design was often overlooked fact that whilst propellers can be scaled down from the real world full size versions the density and molecular structure of the water remains the same…………so what might be right for a real ocean going tug might not necessarily work as well in a scaled down version (its fairly basic fluid dynamics)

You are right about the pumps being able to produce a 'fire hose squirter' as the range should be phenomenal……just think of 1.3lit per second being forced through a 4mm outlet.

Paul

 

 

 

Edited By Paul T on 11/07/2014 14:42:44

[Bob Abell 2Participant @bobabell2]

Hello Paul

Your TurboCad drawing has given me hope that the system can be tamed!

I don't understand the need for such a sophisticated propellor?……..Being CNC machined from solid, sounds extremely expensive?……What sort of improvement in performance are we talking about?

I would have thought, one of those hi tech sub props would have done the job?

With all these nozzles to control, you will make good use of your new multi channel tranny?

Looking forward to the finished product!

Bob

[Paul TParticipant @pault84577]

Hi Captain Bob

The propellers were expensive but theoretically should provide about 25% extra thrust compared to standard issue items, the problem with theories is that they can only be proved correct (or complete bo–ox ) by taking the plunge and producing a prototype…………..this is where I almost invested in one of your 3D printers.

I looked at submarine propellers but couldn't get enough thrust out of them.

The nozzles would be even more useful if I could swivel the outlets (just like a Harrier jet exhaust) but the mechanics of this is beyond me at the moment.

This model is the reason why Jane bought the new transmitters for me

Paul

[lnvisiblemanParticipant @lnvisibleman]

**LINK**

Is this much the same thing ????

[ashley needhamParticipant @ashleyneedham69188]

It is amazing whats out there when you look, or more correctly, know what to look for! Cant wait to see the props. The issue I am thinking is that you will have to have two conventional props to judge the new ones by??

Ashley

[Paul TParticipant @pault84577]

Hi Mike

Yes that's the same sort of thing, I only went for the Rule products because I have been told they are the reliable.

Ashley

Don't be daft… conventional 90mm props are expensive so I wont be doing a comparison…….. I'm not made of money.

Paul

[ashley needhamParticipant @ashleyneedham69188]

Not after buying all that lot !! (I should add a LOL there, eh??)

It would be nice though to see the difference and prove the superiority of a new design. It might be possible to make some props though just to see?? Bob, knock some up for Paul please.Just need to turn some bosses and slit them to accept sheet brass or steel blades, easy for such an engineer as yourself with ten Myfords in his bedroom.

I should be very interested to see a completely new design based on scientific principles rather than just sticking tiny big-boat replica props on models.

Ashley

 

Edited By ashley needham on 11/07/2014 20:38:27

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