Prototype build of ELLIE

[Bob Abell 2Participant @bobabell2]

Three model boat plans on a CD, with the proceeds going to charity, is a very suitable present at this time of year!

You don`t have to make it……..Just buy the disc and marvel at Paul`s tireless efforts and skill`s on the CAD system and feel proud that you have contributed to a worthy cause!

Build the hull carcass and invent your own superstructure…….We`d love to see your creations

All the best chaps from Paul and Bob

[Bob Abell 2Participant @bobabell2]

Just a WIP picture showing latest progress of the SloMo Cruiser

I`m really looking forward to the end result, with the hull planked with Mahogany planks at 45 degrees!

I`m sure Paul will approve

Bob

[Paul TParticipant @pault84577]

You know me Bob I'm a sucker for deeply varnished diagonal planked mahogany.

[Bob Abell 2Participant @bobabell2]

Hello Paul

Being a sucker for diagonal planking……Having you got an example, by any chance?

I might has well get it right

In case you are wondering where 460 planks have come from……..Try Sovereign of the Seas!

Bob the Plank

[Bob Abell 2Participant @bobabell2]

Because the hull will be veneered, I can cover the hull framework with 1mm ply remnants!

This pleases me immensely, as I hate waste and didn`t fancy another 70 mile round trip!

The formers are made from scrap 3mm soft ply, doubled up…….Stringers are 6mm sq hard balsa and skinned with 1mm ply. This combination has made the build much easier to construct

Bob in Steptoes Yard

[Paul TParticipant @pault84577]

Here you go Bob

An example of a veneer diagonal planking

Do you remember this boat

Paul

[Bob Abell 2Participant @bobabell2]

Thanks for the picture, Paul

This is your famous Barrelback with 36 coats of varnish?

Ellie hull….

Just spotted that former 6 is incorrect….The red cutting line is out of position…..About 12mm too high

Bob

[Paul TParticipant @pault84577]

Bob

Yes it the Barrel Back.

The cutting line on Frame 6 is in the correct position, this frame forms the raised back panel of the open cockpit (SeaSpray) version and completes the coaming on all the versions.

You can see how Frame 6 fits in the following images

Paul

[Bob Abell 2Participant @bobabell2]

OK, Paul

My memory, these days…..Is none existant

Bob

[Bob Abell 2Participant @bobabell2]

The patchwork skinning is now complete……..That`s a big job out of the way

Now in the process of fixing the spray/rubbing strips and this is my way of setting them. It looks crude and primitive, but allows the strip to be set precisely before fixing with superglue

Bob

[Bob Abell 2Participant @bobabell2]

Shop floor to Design Office

Just had a thought!

Supposing we fit a Submarine type Hydro plane at the prow, with the intention of activating it during a high speed run….Down wind?

That sounds novel?

Bob

[Paul TParticipant @pault84577]

Bob

Fitting such a device would be up to you but with this shape and weight of hull I doubt that there would be any significant gain, I can do the calculations if you are serious.

Paul

[Bob Abell 2Participant @bobabell2]

The fact that you can calculate the effect is awesome!

Carry on, Doc

A model with assorted novel features would be great fun to play about with on the water

ie….A front rudder……Lifeboat type dampers at the stern……Opposed rudders is not new…….Any suggestions?

Bob

[Bob Abell 2Participant @bobabell2]

A ShowBoat is born!

I`m getting really excited about this build!…..Built for the showstand mainly but with the potential of being an exciting craft on the club pond…..With a few experimental features

Imagine the diagonal side planking, with Barrel Back planking fore and aft, gleaming in the sunshine etc

The tail fin and twin rudders will be the icing on the cake!

Why not start building the hull right now and invent the rest your self?………Send for the plan now, have fun, join in, and keep up to date with the build

You lucky people

Bob the Rabble rowser

[Paul TParticipant @pault84577]

Bob

I have been looking at this all morning and I have bad & good news.

Firstly the bad news, as I suspected the hull is the wrong shape and to heavy for a hydroplane device as it would only create a minimum amount of lift with lots of splashing.

The good news is that the hull in its 3 motor configuration will work very well with a forward mounted retractable hydrofoil. If fitted at F2 position this device would raise the bow and most of the model clear of the surface leaving the props and rudders in the water. I imagine that this is the effect that you wish to achieve.

Paul

[Bob Abell 2Participant @bobabell2]

Thank you Paul

For the time being, I`ll carry on with the cosmetic work and decide later about three motors

Bob

[Paul TParticipant @pault84577]

Bob

If you keep the weight down the hydrofoil system will work with twin motors and a pair of racing props.

The hull / foil point of connection is at the rear of Frame 2.

Paul

[Bob Abell 2Participant @bobabell2]

Thank you, Paul

That's nice to know……Would that be a fixed foil or an animated one?

Bob

[Paul TParticipant @pault84577]

Bob

It can be either fixed or animated as there is plenty of room between F1 and F2 for the machinery but F2 will need to be reinforced by replacing the cut out section.

A little engineering challenge for you.

Paul

[Bob Abell 2Participant @bobabell2]

Another WIP picture for a very special lurker out there!

Note the deck top at the nose is being adjusted to slope dowwards for that racy look……..More to go yet!

Very interesting build at the moment …..Full of forthcoming attractive features……Watch this space, chaps

Bob

[ashley needhamParticipant @ashleyneedham69188]

Bob. The sloped front is remininscent of those ww2 PT boats and always looks racy, at least to me.

I could see an animated foil linked to the throttle…more throttle, more foil..more lift?? I could also see massive amounts of tinkering time and machinery swapping time taking place….

Paul. If you are lifting the front up by using a foil, would not the props be dangerously close to the top of the water and/or be at a funny angle??

A fixed large semi-circular foil might look nice and IF the same were to be fitted aft, with props deep on flexible drives?????

Ashley

[Bob Abell 2Participant @bobabell2]

Thank you, Ashley

Pleased you recognise the racy WW2 look!

Lifting the front up with a forward hydroplane…….Foil?…..Pah!……..Would cause the props to sink, surely?

I could link forward and rear planes, quite easily……..Any sense in that idea?

 

Bob

I think, Paul is still in shock from our frivolous comments on Brutus….lol

Edited By Bob Abell on 14/12/2013 09:29:23

[ashley needhamParticipant @ashleyneedham69188]

When "designing" my models I always welcome any comments, frivolous or not, you never know when an idea will hit the mark.

Brutus deserves to stand out from the sea of mundanity that is "fast boats". Imagine it lined up with a group of boats at the pond side. Would anyone notice the novelty of the design unless they just happen to spot the chisel bow ?? No. It needs a little extra.

I have not exhibited at any shows, but I think we can safely say that no one would walk past my stand without noticing something different!

Ashley

[Paul TParticipant @pault84577]

The science surrounding hydrofoils is fairly complex and starts with calculations being made on either fixed or 'animated' equipment then moving on to forward only or forward and rear foils, needless to say the propshafts on fixed rear foils are very long.

There is a lot of information about this subject on the internet have a look at the basic theory in practice **LINK**

[Bob Abell 2Participant @bobabell2]

That`s very interesting, Paul and now I see what Ashley was referring to, when he mentions the props leaving the water

But…..I wasn`t referring to this type of airfoil

I was referring to submarine type hydro planes that can be operated when required

Bob

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