Sea Hornet

[harry smith 1Participant @harrysmith1]

Hi All

I have the original boat which has sat in a cupboard for 40 years.

It was built as a cabin cruiser not as a speed boat.

It has the original plans and booklet also!!!

The original boat is 25.5 inches(not 24 inches)

Beam is 8 inches

Freeboard is 2.5 inches.

So the kits they sell now are in correct!!!

[harry smith 1Participant @harrysmith1]

Seas Hornet

[Dave MilbournParticipant @davemilbourn48782]

Some pictures might be more illuminating/persuasive, Harry.

Dave M

[harry smith 1Participant @harrysmith1]

Hi Dave M

Just added photo's into my album.

I am getting the original plans scanned, but, the plans have no bulkhead drawings on them.

A fellow modeller has shown me by drawing thru the waterline point and measuring you can make your own bulkhead drawing frames.

The is getting converted to brushless electric with so Hobbyking bits.

3639-1100kv motor with a car 60A ESC(with reverse) and a 5800mah battery.

Prop 40mm x 1.4 pitch.

[Colin BishopModerator @colinbishop34627]

The reason that the plans have no bulkhead profiles is to discourage people making the model without buying the kit!

Colin

[Paul TParticipant @pault84577]

Harry

To expand upon Colins point of the copyright holders wish to discourage people from building without buying a kit, you might also find the drawing information on the plans isn't to the correct scale or size and that there is a good chance that, if you take templates from the plans, nothing will actually fit.

You might end up having to draw the plans yourself and building from scratch.

On the plus side it would be nice to see a Sea Hornet being built.

Regarding the prop size, 40mm sounds a tad on the large size for a 2ft boat…..(standard Ashley disclaimer)…this is only my personal opinion so please don't shout at me.

Best of luck.

Paul

[Dave MilbournParticipant @davemilbourn48782]

Regarding the prop size, 40mm sounds a tad on the large size for a 2ft boat…..

As does that motor, which can produce 800W. That's over 1 BHP and enough for a 46" Huntsman 31. The torque roll with that combination in such a small non-specialist hull will be huge – and possibly uncontrollable. I'd err towards a 2822 size and no bigger than a 32mm prop (say a PropShop 3-blade 1215).
I can definitely see the 50's style open-speedboat shape of the hull, but the cabin looks oddly later in style (more 60's or even 70's). It's certainly nothing like the other Aerokits models, which were very 50's.
As for plans, I've drawn a few in the past and I can't see the point in drawing something incorrectly. Do you start with an accurate plan and then deliberately introduce errors? If you draw something one size and then give it different dimensions how does the builder know which is correct? You might just as well not have a plan at all.

The other mystery – and it genuinely does puzzle me – is the number of kits you find for sale secondhand and said to be complete except for the plans and instructions. Why keep the paperwork separate from the kit, and why do so many folk appear to do it? Am I missing something here or maybe I'm not quite as cynical as I could be…………..

Dave M

[Colin BishopModerator @colinbishop34627]

From the photos it looks like a Sea Hornet hull with a freelance superstructure added.

As Dave says, it is unlikely that the plans will have been deliberately distorted, just incomplete. The advert for the current kit does say that the design has been 'modernised' which probably accounts for the discrepancy in length.

Colin

[harry smith 1Participant @harrysmith1]

Hi All

I measured the boat as built(I do not like the top myself).

Built Length 25 and 3/8 total.

Beam 8 and 1/4 total.

It's a friends, the motor purchase and before he said the size for the sea hornet.

All he said that it had a 1.5 diesel and a 40mm prop.

So I told him that I was running that size prop on my boat (850mm length) and what size motor etc.

He turned up with the motor.

I also have a 24" shallow vee with a Hobbyking F3 outboard on the stern(motor28mm, 700watts ,3000kv,3S battery(33,300rpm) prop metal 32mm x 1.4 pitch.

This is insanely quick!!!

On flat water in a straight line it's sitting on the prop with the hull sitting parallel with the water!!!

So the 3639 and prop is too big and I think he a smaller motor would be better!!!

Hobbyking have a Mercury look a like outboard, if you like the more scale look.

Harry

[Dave MilbournParticipant @davemilbourn48782]

Typical 1.5cc competition diesel motor (ED Super Fury) had a peak power output of 0.165BHP at 14,000 RPM. Many "sports" motors were less powerful. Wish your friend good luck with the 3639 brushless. I think he might need it…………

Dave M

[harry smith 1Participant @harrysmith1]

Hi Dave

This one had a Tapian diesel in it.

Thank you the ED specs.

I have a XK 2845B-2000kv 280watt 28mm motor and a 32mm x 1.4 pitch prop( a 2 blade and a 3 blade),but, I think it would be a bit tame.

Also had a B28-57-17L 1700Kv 630 watt (18870rpm on 3S) which I think would be better.

The 2 blade is a spare for my Hobbyking F3 outboard and the 3 blade is the upgrade ,but , I found with the 3 blade gave the boat better low speed bite but loaded up the motor on the top end.

The only specs on the motor is 28mm 3000Kv wattage ??

As Hobbyking have a 28 mm mount mounted drive kit (codes BP22-S Prop and BP-22 Sleeve) with a 30mm plastic prop.

Just received another oldie Swordsman(with plans no bulkheads) 33and 1/4 by 11and 1/2 beam, I think the 40mm prop and 3639 motor would fit this one??

[Paul TParticipant @pault84577]

Hi Harry

I have to say that I agree with Colin regarding your boats superstructure in that it definitely looks like a freelance addition, given Les Rowell's style of design I would have said that it is highly unlikely that he would have added such a high superstructure to this little boat.

However you do say that you have copies of the original plans and booklet which, of course, prove the link and would cause quite a stir with the Les Rowell fans, could you photograph or scan the documents and post them on this thread. If this can be authenticated your little boat could be worth a great deal of money.

All the best

Paul

[Dave MilbournParticipant @davemilbourn48782]

Would this be the model in question (Canabus – 2nd posting with photo of plan)? I don't see a superstructure drawn here. **LINK**

The Taipan was an Australian motor with an excellent reputation for power output – probably equal to the ED Super Fury.

DM

[harry smith 1Participant @harrysmith1]

Hi Dave

The original boat only had two windscreens and was not shown on the plan like the bulkheads.

This was so you would buy the kit.

But I think a good look a like would be better than the exist cabin.

But it's not my model but I think I can talk him into changing, if it would increase the value of the boat.

I have the PDF files of the plans (also the Swordsman 33 and 1/4&quot.

The Swordsman plan is in better condition and again no bulkhead drawings.

I am waiting for the owner to return to get a look a the boat, as it's only has the sides on it and no drive line or rudder.

So getting a few bulkhead measurement would be very easy.

[Dave MilbournParticipant @davemilbourn48782]

The misunderstanding arose because your original post implied that the original design had that anachronistic superstructure as well as the fact that the Vintage Model Co kit is "incorrect".
In fact the VMCo kit has, according to their blurb, "been modernised" etc and the advert clearly states that it's 24" long and not 25.5" like the Les Rowell design. Quite why they shortened it is anyone's guess. As for that superstructure I think the less said the better! **LINK**

I think we're all on the same page now – apart from the fitting of a motor and prop which seem far too powerful.

Dave M

[harry smith 1Participant @harrysmith1]

Hi

The owner called in today motor,ESC, radio fitted(roughly into place).

Programmed the ESC, waiting on a 3.175mm to3/16" coupler and she will ready.

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