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Author Topic: Fairey Huntsman aft cabin becomes a Sports Fisherman  (Read 1988 times)

ChrisF

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #50 on: May 27, 2020, 03:50:24 PM »

Thanks for the information David. One of my next builds is going to have exposed prop shafts. Your P brackets look lovely. I see you have done away with the usual locking nut and used a grub screw to secure the prop which gives a nice neat look. Are they Prop Shop props (they look like it) which you have drilled and tapped for the grub screws?

Chris
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DJW

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #51 on: May 27, 2020, 04:17:01 PM »

Hi Chris


Ah yes, the props are from Prop shop, and they are beautiful.  And the grub screw approach is courtesy of UKMike..!  Drilled and tapped (M3 I think) then short grub screws.  I did put a flat on the shaft threads as I didn't want to risk stripping the threads in the prop hub. They'll be put in with loctite before heading to the lake.


This is before the conversion:





So the grub screw does look so much better.


Best regards
David.
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ukmike

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #52 on: June 02, 2020, 05:15:12 PM »

Hello.


Hull glassed now and rubbed down, 1oz cloth on the bottom and transom with 1/2oz on the sides.


2 coats of Z Poxy finishing resin unthinned, rubbing down between coats, no need for thinning as I always sand the majority of the resin away.


Have marked out the position of the lifting strakes on one side with tape and given it a dusting of primer, which also shows any surface filling that might be needed.


Fortunately, all looks good so none needed.


The photos show the results and the positioning of the strakes and the main spray rail that is already built into the hull sides.


Also, picture for ChisF of the bow flair.


Mike.
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ChrisF

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #53 on: June 02, 2020, 10:23:53 PM »

Hi Mike

You've made a nice job of the bow - to be expected of course! How did you manage to do the sides in one piece apart from the small block at the bow given the compound curvature? I did it in two and had to use thinner ply to the bow area. And did you put some additional timber in to support the edge of the ply to maintain the vertical strip for the rubbing strip? Here's a photo of mine before cloth and resin, only 2/3 the size though. I'm going to build another hull for the aft cabin version of the Huntsman 31 and have introduced some additional small frames to form the flare.


Chris

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ukmike

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #54 on: June 02, 2020, 11:04:03 PM »

Hi Chris.
I pre shaped that part of the ply, about 150mm long, by soaking in boiling water with a little washing up liquid added until I got fed up of boiling the kettle several times.
I then taped it around a cylindrical flower pot 120mm diameter and then left it overnight to dry.
The cylinder was layed long ways of course.
It's easier to fit the side starting bow first.
I held the ply in place using a pin pusher and brass pins, plus glue of course
I use a pin pusher and brass pins to hold almost all wooden parts in my models.
Your extra frames idea sounds a good way to go but would be helped by pre bending.
Hope that all makes sense.


Mike.
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DJW

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #55 on: June 03, 2020, 08:50:05 AM »

Morning Mike


Very nice hull form coming through. I know it's a classic, but as Chris said that hull is not easy to get the compound curves correct.


Best regards
David.
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ukmike

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #56 on: June 03, 2020, 10:59:28 AM »

Hi David.


I'm a little disappointed that I couldn't change change the overall shape of the bow very much, so it has to do.


Have decided not to use the 3 strakes but will now be fitting only two, also, reversing the the order and alter the


curve by flattening it out somewhat. Being only 2 it will appear that the bottom one is then the shortest and


there will be a sight increase in the size too.


This is because 3 were unnecessary and esthetically ugly, too much like the original boat.


I've worked out that the lift available will be just as as much as the 3 setup and a lot more pleasing to the eye.


Will post a picture showing the new setup, all be it held in place with tape.


Mike.


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DJW

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #57 on: June 03, 2020, 11:14:11 AM »

Morning Mike


She's going to be a hybrid for sure..!  Are you planning to keep the strakes full length of the hull..?  I ask as does the stern need them..?  Might be easier in planing turns if the stern of the hull doesn't have the extra grip on the water that the sharp edged strakes will give, so the stern can slide sideways with rudder applied. Given the profusion of carbon fibre that stern is't going to be heavy..!  :-))


Best regards
David.
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ChrisF

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #58 on: June 03, 2020, 11:37:18 AM »

Thanks Mike

Good process, it is a tricky hull to get right and I'm not 100% happy with mine. Bit trickier being a smaller hull at 31" - well that's my excuse anyway!

Re. David's comment. I know yours isn't a Huntsman now but on the full-sized boats, being twin props the strakes stop well short of the stern and are staggered.

Chris
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ukmike

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #59 on: June 03, 2020, 01:27:13 PM »

After looking at many photos of the the original boat, an awful lot of them have have been fitted with trim tabs, I assume because the very severe angle of the "V"
 
didn't provide enough lift to flatten the planing

Therefore, that is the reason for the fitting of lifting strakes,( not spray rails ) and why they will go all the way to the transom. That's my take on it and saves the need
 
trim tabs.

A few pictures, not fitted, just held in place with tape


Mike.



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DaveM

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #60 on: June 03, 2020, 04:21:22 PM »

Some of those trim tabs were actually nothing more than anti-cavitation plates. Photo of Mirak Huntsman 31 restoration project by Scott Pett.
I've built several different models of Huntsman 31 in three different scales, and I'm now convinced the only real way to fabricate that bow flare properly in wood is either to use block balsa or double-diagonal planking. Even a very creditable job like the one you've done won't avoid a 'lump' somewhere along the curve. It's like trying to cover the inside of a big spoon with sheet plywood!

Dave M
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ukmike

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #61 on: June 06, 2020, 06:35:14 PM »

Evening all.


All the rails fitted and have given it a light coat of primer just to show up any imperfections, of which there are many.


Will put that all right and put on another coat, hopefully all will be O.K.


If so, I will sand the bulk of it away ready for the final colour.


I have to admit to not being very pleased with it so far, as there is quite lot of fettling to be done.


Mike.

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DaveM

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #62 on: June 06, 2020, 06:51:00 PM »

Mike
Looks A1 Top-notch OK to me. The thing to remember is that only you know where all the less-than-good bits under the waterline are, so the trick is a) don't draw attention to them, and b) divert the viewer's eye with some easy-but-clever stuff topsides. Works for me...has done for years!    8)
DaveM
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ukmike

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #63 on: June 06, 2020, 09:43:14 PM »

Thanks Dave.


My problem is that the topsides will most likely need the same level of snagging as the hull.


Mike.
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DaveM

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #64 on: June 06, 2020, 10:59:48 PM »

Thanks Dave.
My problem is that the topsides will most likely need the same level of snagging as the hull.
Mike.
Mike - that's not a problem. In the modern parlance it's a challenge. I've always said that the difference between Mrs Milbs #1 and #2 is that #1 could spot the only brush-hair I'd left after glossing a whole door, whereas #2 stands back and says "That looks FANTASTIC!"
It's all a question of perspective, m'duck.
DaveM
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ukmike

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #65 on: June 24, 2020, 03:01:18 PM »

Hello.


Some changes to the motor mounting system, gone from wood to Aluminium and it is far better and more accurate.


Another coat of White primer to show up any fine defects, they will be corrected and then the majority of it will be sanded away.


When the hull is complete I'll carry on with the altered superstructure with the addition of a flying bridge with second helm position, still keeping the original wheelhouse


but heavily modified.


Some pictures of the state of play.
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DJW

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #66 on: June 24, 2020, 03:45:15 PM »

Looking excellent Mike.  Is the plinth just aft of the motors for the thrust bearings..?


Prop position relative to rudder looks fine too. (To me.)  Is that forward of the plan position..?


Best regards
David.
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ukmike

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #67 on: June 24, 2020, 04:03:21 PM »

Dead right David.


Am making the brackets as we speak. Appropriately bent to the required angle.


Mike.
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ChrisF

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #68 on: June 24, 2020, 05:42:27 PM »

Your attention to detail and execution never fails to impress Mike.

Looking forward to seeing the modifications to the superstructure.

Chris
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ukmike

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #69 on: June 28, 2020, 04:59:33 PM »

Good Afternoon.


If it's of any interest to anyone, here are some pictures of the prop shaft thrust bearing set up.


All of the fwd thrust is taken at this point, so nothing reaches the spiral coupling or motor bearings.


This method only works when the boat is going ahead, but, because the reverse maximum revs are limited to 20% when full astern, the spiral coupling will easily


handle what little thrust is presented to it


I've tested it and it works very well.


Mike.
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DJW

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #70 on: June 28, 2020, 08:38:33 PM »

Looking good Mike, and easily adjustable. P brackets next..?
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ukmike

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #71 on: June 28, 2020, 08:57:01 PM »

Evening David.


That's right, but first I need to find out why the carbon rudder blades don't like being painted. There is some sort of reaction that causes the weave pattern to show

through the applied primer, no matter what type of primer used. It's annoying but I'll solve it one way or another.

Will finally get the Riva windscreen frame back from the platers next week so this build will have to stop and the the Riva will take over.

Looking forward to that.

Mike.
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ukmike

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Re: Fairey Huntsman aft cabin becomes a Sports Fisherman
« Reply #72 on: July 07, 2020, 12:19:36 PM »

Hello.

This is as far as this blog goes for a while, probably until next year, due to my big Riva being back in the shed to for me to continue working on it.

Mike.
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