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[Martin13]

The last job to do with the transom flap was to fit another length of Aluminium angle above the flap. The angle also needed 4 slots filed to allow for the hinges to pass through. After this had been achieved, the angle was fitted into place and flap checked for free up and down movement before being epoxied into place.
The transom flap was reinstalled and found that the flap could move 15 degrees up and 15 degrees down without interference - ample as I only require about 5 degrees either way.

Martin du

[Martin13]

Martin No.1 mentioned a valid point - I need to now and again add something into the photo's to show relative scale - good point

Martin du

[Martin13]

Hope the One Pound Note is still valid - got it in the early 70's.

Before I start with the linkages through the transom, I thought that I may start on the transom shelf and when finished and glued into place, then start on linkages.

The shelf and flap epoxy joins will be cleaned up with Dremel tool including wet and dry. before painting which I hope to do this weekend.

Picture of transom shelf construction (early stage) with references added

Martin doon under and that's it for tonight - watch this space ::)

[bluebird]

Hi ya Martin doon under 

The One Pound Note UK sterling is not legal tender anymore  ???  We now have One Pound coins to replace the One Pound Note - 

Can I make a comment on your build my mate?    ONE HELL OF A BUILD THIS IS TURNING OUT TO BE MY MATE    a secret craftsman that is you!!!!

aye john e

bluebirdy

[Martin (Admin)]

...a pound note..... ah, those were the days....

I remember with my first pond note..... I bought a house, a car and put 8 bob in the Bank of England.....  ::)

[Martin13]

Hi ya Martin doon under 

The One Pound Note UK sterling is not legal tender anymore  ???  We now have One Pound coins to replace the One Pound Note - 

Can I make a comment on your build my mate?    ONE HELL OF A BUILD THIS IS TURNING OUT TO BE MY MATE    a secret craftsman that is you!!!!

aye john e

bluebirdy

Rats !!!!  I've got a whole bunch of those - only good for wallpaper I suppose . How can I get hold of a One Pound Coin? How big is it?? ???

Glad to hear the build meets with your approval Hope to make a start on linkages and servo mounts this weekend as per your drawing..

Thanks again John - much appreciated.

Martin the happy doon under :) :)

[Martin (Admin)]

Use the dollar and/or the pound note..... we'll enjoy the build and reminisce at the same time!
What motors will you be using?

[Martin13]

Use the dollar and/or the pound note..... we'll enjoy the build and reminisce at the same time!
What motors will you be using?

Hi Martin - Glad to see that the note meets with your approval.

The motors will be 3 (now this is a mouth full) Darke Horse Speed 700, 3:1 Ratio Planetary extra High Performance Low Inertia Marine power units running on 20 cells each ( that's a lot of batteries) about 24Volts, running time 40 minutes minimum at medium to high revs. ::) ::) ::)

On the weekend, I'll sit the 3 motors in place with the One Pound Note for reference.

Martin doon under

[Bradley]

Just a little aside - I think that one pound notes are, probably now, collectors' items so treat it gently Martin du.  :)  Like the build - very good, very interesting  .
Derek.   

[GaryM]

Hi Martin DU
Just spent a very enjoyable hour and a half reading through your build, it's fantastic, it really is. :)
I especially like the scale size.

regards
Gary :)

[Peter Fitness]

Hi Martin 13,

The British 1 pound coin is roughly the diameter of our $2 coin, but thicker, and the same colour.

Peter.

[Martin13]

Are you fixing the bearings as in picture with the bush flange forward   BB P10110126 ?

Proteus
 

Proteus,

The gentleman that supplied me the motors plus the flanged bushes contacted me today after viewing the build and your comments.

You are correct         I'm wrong

The flanged bush must be fitted the other way around - that is, the flange must be behind the prop..

Thanks for your keen eye and comments - most appreciated

Martin doon under

[Martin13]

Hi Martin DU
Just spent a very enjoyable hour and a half reading through your build, it's fantastic, it really is. :)
I especially like the scale size.

regards
Gary :)

GaryM,

Glad to hear that you are enjoying the build. Don't know if anybody has built a 6 foot (1800mm) model of BB before - everything has to be scratch built. Hope I can keep you entertained in the future and thanks for your kind comments.

Derek,
Thanks for the comments and hope that you keep watching this space. I'll look after the rest of the One Pound Notes.

Peter,
Must send you a PM and thanks for info. If I visit the money exchange booth at the airport, do you reckon I can get a One Pound Coin??. Also, do they have tinnies in the UK, possibly the same size as our XXXX or VB??? - Liquid Reference Material and throat lubrication

Martin doon under

[Peter Fitness]

Yes Martin, they do have tinnies in the UK. They're quite civilised over there actually,  :) their tinnies are bigger than ours, and you can get XXXX, Fosters or just about any brand of beer you want, in the liquor aisles of the supermarkets. Great idea 
Peter.

[boatmadman]

We even have proper warm beer 'over here' 

[Peter Fitness]

We even have proper warm beer 'over here' 

You certainly do boatmadman, and furthermore, I like British beer - in fact, I like just about ANY beer 

Peter.

[Martin13]

Use the dollar and/or the pound note..... we'll enjoy the build and reminisce at the same time!
What motors will you be using?

Martin No.1 To answer your question re motors - here are some photo's with motors temporarily installed for your perusal....

Martin du

[Martin13]

Continued on with building the Transom Shelf - lots a small bits of wood but finally got it right.

Martin du

[Martin13]

CA glue tends to leave stains on timber but with a bit of rubbing down with wet and dry - looking good.
Now with a coat of primer on the shelf before carefully using epoxy to glue into place.

Martin du

[Martin13]

With the Transom Shelf firmly affixed to the transom, it's now time to start thinking about linkages connected to Transom flap through transom - work begins using Bluebird's method as posted earlier....

Martin du

[bluebird]

Hey Martin

the boat is looking great - 

aye
john

[DickyD]

Grieves me to agree with John but on this occasion he is right Martin. It doesn't often happen. 

It's looking great. Are you sure its the right way up seeing as you is doon under ?  :-\

[Martin13]

It's looking great. Are you sure its the right way up seeing as you is doon under ?  :-\

Not sure Dicky :-\ Been doon under for so long - its' a change to turn the hull over

Martin doon under

[Martin13]

After measuring and marking out, I drilled the 2 holes into the transom below the shelf to fit the brass tubes for the transom flap control rods. The Brass tubes were then epoxied into place and after set, P38 added for extra strength. The control rods were made with clevises and connected to flap assembly. The control mechanism for inside the hull was also made up and can be seen on mate below the hull.

Martin doon under

[Martin13]

After installing the control rods through the brass tubes and connecting up to the transom flap, I had a few problems. Initially the brass tubes extended the hull by about 35mm (1, 1/2 inches). The Flap was designed to move a maximum of 15 degrees up or down but noticed that now and again, one rod was sticking in the tube. At this point, I reduced the length of the brass tube to extend the hull by 5mm or 1/2 inch and operated much better.

I was still unhappy with the setup - the clearance between the tube and rod was quite small and could see that if any muck got caught on the rod, the rod may jam. Also I did not like the rod thread extending above the clevis at the transom flap (see previous photo's) - did not look good.

So, I pulled the whole lot out and started again.

This time I installed brass tubes with ample clearance for the rods to pass through and also made up new control rods and Clevises.

I'm a Happy Chappy now - much better;D

[Martin13]

Next step was to make up 2 brass mounting brackets for the control mechanism inside the hull - the photo is self explanatory combined with Bluebird's early drawing for the setup - only needs a servo and control arm to be installed, but need to setup rudder control arms to see what space I have and where to place servos.
I also need to install motor water cooling pickup's - forgot about these - thanks Bluebird.

Martin no longer itchin doon under

[Martin13]

And one more photo

Martin doon under

[bluebird]

Good evening |Martin doon there - cos it's night time there isnt it my mate....by you are doing well on this build.

Can I make 2 comments Sir;

Looking at the photograph showing your propellers and P brackets side view; I noticed that the bushes on the P brackets - leading edge or the face that is going to face the flow of the water when moving forward is still square - should this be shaped similar to a bullet to ease flow through the water?

2nd - looking at the linkage support inside the hull where you have the 2 brass supports P38 stuck to the transom - can we not think of some form of plywood shelf - this would support these pieces of brass rather than the P38 as when the P38 really goes off hard.....it may become a bit brittle and if your model takes a bump on the flap - it may snap these off....food for thought my mate.....but hey its definitely looking GOOD!!!

aye
john e
bluebird

[DickyD]

Thats coming on well Itchy, very impressive.

That John doesn't miss much does he ?  ::)

[bluebird]

No, Scratchy he doesnt 

[Martin13]

Good evening |Martin doon there - cos it's night time there isnt it my mate....by you are doing well on this build.

Can I make 2 comments Sir;

Looking at the photograph showing your propellers and P brackets side view; I noticed that the bushes on the P brackets - leading edge or the face that is going to face the flow of the water when moving forward is still square - should this be shaped similar to a bullet to ease flow through the water?

2nd - looking at the linkage support inside the hull where you have the 2 brass supports P38 stuck to the transom - can we not think of some form of plywood shelf - this would support these pieces of brass rather than the P38 as when the P38 really goes off hard.....it may become a bit brittle and if your model takes a bump on the flap - it may snap these off....food for thought my mate.....but hey its definitely looking GOOD!!!

aye
john e
bluebird

G'Day John,

It's 9:30pm to be exact and after a rotten day at work, my arms are ready to drop off - too old for this sh#t.

Comment 1. The P Brackets have been filed down to more like a bullet as you once suggested that I should do. See the area where the paint is missing. It's been filed down roughly at a 45 degree angle. Do you think I should decrease the angle (that is, take off more paint) and attempt to flare even more - your thoughts please....On the weekend, I'll see if I can take a couple of photo's from a better angle of the P Brackets.

Comment 2. I have taken a straight on shot of the linkages inside the hull but it looks messy (starting to get proud of my work - on an ego trip). Beneath the 2 Brass supports, I epoxied a length of 6mm square hardwood to aid alignment and support. Firstly, I epoxied in the brass supports with a reasonable filler around them before applying P38. The brass supports fitted into the 8mm transom by about 6mm was then back filled with more epoxy then only a light smear of P38 - This can be seen on the last photo above transom shelf.

Do you believe I require more support to the brass mounts?? Maybe a piece of brass or wood from the Brass support close to pivot point back down at a 45 degree angle and epoxied to the transom.?????

Your thoughts and comments are most appreciated as it will aid me in making a better model :)

Martin doon under

[Martin13]

Thats coming on well Itchy, very impressive.

That John doesn't miss much does he ?  ::)

Thanks Richard - your right again, John doesn't miss much and I'm glad of it.

Martin

[Martin13]

Hi ya Martin doon under 

The One Pound Note UK sterling is not legal tender anymore  ???  We now have One Pound coins to replace the One Pound Note - 

aye john e

bluebirdy

Hey John,

You willing to swap a One Pound Note UK sterling for a One Pound coin ::) ::)

Martin doon under

[Martin (Admin)]

How was the 'trim tab'(?) operated on the real boat?
Do you have a picture of the full size?

[Martin13]

How was the 'trim tab'(?) operated on the real boat?
Do you have a picture of the full size?

Hi Martin No.1

I do have some pictures of the internals plus original drawings of the mechanical layout. The transom flap operational setup is quite complicated as hydraulics are also used. You can imagine the amount of stress on this flap with a boat going in excess of 50 knots.

That being the case, when I built the flap, I was quite generous with epoxy in its construction. I cannot see the flap or hinging mechanism failing (cos I made it so well) but the control mechanism may have to be built stronger - time will tell.

The rudder operational setup will be as the original. This layout suits my requirements for servo mounting etc.

Hope that answers your question.

Bluebird, where is my One Pound Coin

Martin doon under